CN111705254A - CoNiFe intermediate entropy alloy for corrosion-resistant dynamic seal and preparation method thereof - Google Patents
CoNiFe intermediate entropy alloy for corrosion-resistant dynamic seal and preparation method thereof Download PDFInfo
- Publication number
- CN111705254A CN111705254A CN202010616505.6A CN202010616505A CN111705254A CN 111705254 A CN111705254 A CN 111705254A CN 202010616505 A CN202010616505 A CN 202010616505A CN 111705254 A CN111705254 A CN 111705254A
- Authority
- CN
- China
- Prior art keywords
- entropy alloy
- corrosion
- conife
- rolling
- preparation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C30/00—Alloys containing less than 50% by weight of each constituent
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/03—Alloys based on nickel or cobalt based on nickel
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Forging (AREA)
Abstract
the invention relates to a CoNiFe intermediate entropy alloy for corrosion-resistant dynamic seal and a preparation method thereof, wherein the CoNiFe intermediate entropy alloy for the dynamic seal comprises 5-35% of cobalt, 5-35% of iron and the balance of nickel, the proportion of special grain boundaries (particularly sigma 3 grain boundaries) in the intermediate entropy alloy is regulated and controlled through grain boundary engineering, the improvement of the low sigma CSL grain boundary proportion and the interruption of high-energy random grain boundary network connectivity are realized, wherein the proportion of the low sigma CSL (the grain boundaries are more than or equal to 3 and less than or equal to 29) is 40-70%, and the proportion of the sigma 3 grain boundaries in the low sigma CSL grain boundaries is more than 80%, so that the corrosion resistance of the intermediate entropy alloy is effectively improved23～0.03μA/cm2. The corrosion-resistant CoNiFe intermediate entropy alloy prepared by the method can be widely applied to the field of dynamic sealing materials.
Description
Technical Field
The invention relates to an alloy preparation method, in particular to a CoNiFe intermediate entropy alloy for corrosion-resistant dynamic seal and a preparation method thereof, belonging to the technical field of dynamic seal materials.
Background
The dynamic seal is an important part of an aircraft engine and other turbomachines, and is widely applied to the fields of various aircraft engines, aeroderivative gas turbines, steam turbines, heavy-duty gas turbines, nuclear power units and the like. Dynamic sealing materials are usually operated under special conditions of high rotational speed, high ambient temperature or high frictional heat generation, which requires high corrosion resistance. The microstructure determines the performance of the material, the metal material common in industry is mostly crystal material, and the grain boundaryAs an important component of polycrystalline materials, the corrosion phenomenon is basically existed in all industrial fields, the fact that the corrosion causes huge economic loss is well known, and according to statistics, the direct economic loss caused by metal corrosion worldwide is about 7000-10000 billion dollars, wherein the annual corrosion loss rate in America accounts for 4.2% of GDP, the annual economic loss caused by corrosion in China accounts for 3.3% of GDP, the industrial and engineering corrosion problems seriously restrict the industrial development, and the improvement of the corrosion performance of metal structural materials has important research value. The proposal of the grain boundary engineering opens up a new way for improving the corrosion performance of the metal material. Krongberg et al [1 ]]based on the CSL model, grain boundaries are divided into low- ∑ CSL grain boundaries (∑ ≦ 29) (also referred to as special grain boundaries) and random grain boundaries (∑)>29). The low sigma CSL has low and stable grain boundary energy, and has strong inhibiting effect on slip fracture, stress corrosion, crack propagation, solute segregation and the like. Random grain boundaries, due to their high energy and high mobility, often become the core and propagation channels of cracks, leading to the occurrence of grain boundary corrosion. The grain boundary characteristic distribution of the material is regulated and controlled through a certain deformation or heat treatment process, the improvement of the low sigma CSL grain boundary proportion and the interruption of the network connectivity of a high-energy random grain boundary are realized, and the purpose of controlling and optimizing the material is achieved, namely the grain boundary engineering [2-4 ]]. Since 2004, a completely new alloy has entered the researchers' view, a multi-principal element alloy, which is rapidly becoming a focus of research because of its unique alloy design and excellent properties [5-10 ]]. According to the size of the alloy mixed entropy value, the multi-principal-element alloy is divided into a high-entropy alloy (delta Smix is more than 1.6R) and a medium-entropy alloy (the mixed entropy is more than or equal to 1.6R and more than or equal to delta Smix is more than or equal to 1R). Gludovatz et al [6 ]]Researches show that the rolled CrCoNi medium-entropy alloy has excellent room temperature and low temperature performances, the tensile strength is close to 1GPa, the fracture elongation reaches 70 percent, and the fracture toughness exceeds 200MPa m1/2Even at low temperature, the tensile strength exceeds 1.3GPa, the elongation at break reaches 90 percent, and the fracture toughness value also reaches 275MPa m1/2. The intermediate entropy alloy of CrCoNi becomes one of the metal materials with the best plasticity. Sohn et al [11]The VCoNiCr intermediate entropy alloy is designed and prepared by utilizing the lattice distortion effect of the multi-principal-element alloy, and the room temperature tensile test result shows that the yield strength of the VCoNiCr intermediate entropy alloy is higher than 1GPa, and the VCoNiCr intermediate entropy alloy has good ductility (40%). The yield strength at room temperature is far higher than that of most multi-principal-element alloys, and the alloy has very large application potential. Tsuu et al [12 ]]The H of the as-cast FeCoNi medium-entropy alloy and the FeCoNiCr high-entropy alloy are contrastively researched2SO4And the corrosion behavior in NaCl solution, the corrosion resistance of the entropy alloy in FeCoNi is found to be better than that of FeCoNiCr high-entropy alloy, and the corrosion resistance of both is stronger than that of 304 stainless steel. The previous researches also find that the FeCoNi intermediate entropy alloy has good cold and hot processing performance and wide application prospect, and then after plastic processing, the corrosion performance of the FeCoNi intermediate entropy alloy is obviously reduced compared with the corrosion performance of the FeCoNi intermediate entropy alloy in an as-cast state due to internal stress caused by deformation, so that the service performance of the FeCoNi intermediate entropy alloy is greatly reduced. The method adopts a grain boundary engineering method, and improves the corrosion resistance of the FeCoNi intermediate entropy alloy by regulating and controlling the proportion of low sigma CSL grain boundaries (particularly sigma 3 grain boundaries). The method is controllable, reliable and easy to popularize and apply, and can be expanded to entropy alloys in other similar classes.
[1]M.L.Kronberg,F.H.Wilson,Secondary Recrystallization in Copper,JOM1(8)501-514.
[2]G.Wu,D.Juuljensen,Orientations of recrystallization nucleideveloped in columnar-grained Ni at triple junctions and a high-angle grainboundary,Acta Materialia 55(15)(2007)4955-4964.
[3]M.K.Dash,R.Mythili,A.Dasgupta,S.Saroja,Effect of AnnealingTreatment onΣ3-Type CSL Boundaries and Its Interactions in 304HCu GradeAustenitic Stainless Steel,Metallurgical and Materials Transactions A 49(7)(2018)2843-2853.
[4]E.A.Holm,D.L.Olmsted,S.M.Foiles,Comparing grain boundary energiesin face-centered cubic metals:Al,Au,Cu and Ni,Scripta Materialia 63(9)(2010)905-908.
[5]Y.Lu,X.Gao,L.Jiang,Z.Chen,T.Wang,J.Jie,H.Kang,Y.Zhang,S.Guo,H.Ruan,Y.Zhao,Z.Cao,T.Li,Directly cast bulk eutectic and near-eutectic highentropy alloys with balanced strength and ductility in a wide temperaturerange,Acta Materialia 124(2017)143-150.
[6]B.Gludovatz,A.Hohenwarter,K.V.Thurston,H.Bei,Z.Wu,E.P.George,R.O.Ritchie,Exceptional damage-tolerance of a medium-entropy alloy CrCoNi atcryogenic temperatures,Nature Conmucation 7(2016)10602.
[7]X.Gabaix,P.Gopikrishnan,V.Plerou,H.E.Stanley,A theory of power-lawdistributions in financial market fluctuations,Nature 423(6937)(2003)267-70.
[8]Z.Li,K.G.Pradeep,Y.Deng,D.Raabe,C.C.Tasan,Metastable high-entropydual-phase alloys overcome the strength-ductility trade-off,Nature 534(2016)227-30.
[9]Y.Qiu,Y.J.Hu,A.Taylor,M.J.Styles,R.K.W.Marceau,A.V.Ceguerra,M.A.Gibson,Z.K.Liu,H.L.Fraser,N.Birbilis,A lightweight single-phase AlTiVCrcompositionally complex alloy,Acta Materialia 123(2017)115-124.
[10]C.E.Slone,S.Chakraborty,J.Miao,E.P.George,M.J.Mills,S.R.Niezgoda,Influence of deformation induced nanoscale twinning and FCC-HCPtransformation on hardening and texture development in medium-entropy CrCoNialloy,Acta Materialia158(2018)38-52.
[11]S.S.Sohn,A.Kwiatkowski da Silva,Y.Ikeda,F.
W.Lu,W.S.Choi,B.Gault,D.Ponge,J.Neugebauer,D.Raabe,Ultrastrong Medium-Entropy Single-PhaseAlloys Designed via Severe Lattice Distortion,Advanced Materials 31(8)(2019)1807142.
[12]C.H.Tsau,S.X.Lin,C.H.Fang,Microstructures and corrosion behaviorsof FeCoNi and CrFeCoNi equimolar alloys,Materials Chemistry and Physics 186(2017)534-540.
Disclosure of Invention
The invention provides a CoNiFe intermediate entropy alloy for corrosion-resistant dynamic seal and a preparation method thereof aiming at the problems in the prior art, the technical scheme provides a method for regulating and controlling the corrosion resistance of the CoNiFe intermediate entropy alloy, and the improvement of the low sigma CSL crystal boundary proportion is realized by controlling and optimizing the internal crystal boundary characteristic distribution of materials by utilizing the thought of crystal boundary engineering, so that the network connectivity of high-energy random crystal boundary is broken, and the purpose of regulating and controlling the corrosion resistance of the intermediate entropy alloy is achieved.
In order to achieve the purpose, the technical scheme of the invention is as follows, the CoNiFe entropy alloy for corrosion-resistant dynamic seal and the preparation method thereof are as follows, and the CoNiFe entropy alloy for dynamic seal comprises the following components: 5% -35% of cobalt, 5% -35% of iron and the balance of nickel, wherein the grain boundary distribution of the CoNiFe intermediate entropy alloy for corrosion-resistant dynamic sealing is regulated and controlled through grain boundary engineering, the proportion of low sigma CSL (grain boundary sigma is more than or equal to 3 and less than or equal to 29) in the CoNiFe intermediate entropy alloy for corrosion-resistant dynamic sealing is 40% -70%, and the proportion of sigma 3 grain boundary in the low sigma CSL grain boundary is higher than 80%.
The preparation method comprises the following specific steps:
the first step is vacuum smelting, the granular/block raw material with the atomic percentage of 5 to 35 percent of cobalt, 5 to 35 percent of iron and 5 to 35 percent of nickel (the purity is more than 99.99 percent) is put into a vacuum smelting furnace and is vacuumized to 1 × 10-3～5×10- 3Pa, melting current: 250-300A, then filling argon until the pressure in the furnace is: 0.1-0.5 Pa, overturning and repeatedly smelting for 2-3 times, introducing magnetic stirring and smelting for 1-3 times, and finally cooling along with the furnace to form ingots;
step two: homogenizing, namely placing the ingot prepared by vacuum melting in a muffle furnace, vacuumizing, filling argon, and preserving the temperature at 800-1000 ℃ for 12-24 hours to uniformly distribute elements in the alloy;
step three: hot forging, namely putting the ingot subjected to homogenizing annealing into an induction furnace with the set temperature of 800-1100 ℃, preserving heat for 10-20 minutes, and then forging different surfaces of the ingot by adopting a free forging method, wherein the forging frequency is as follows: 240 times/min;
step four: and (3) controlling rolling, keeping the temperature of the forging material alloy prepared by hot forging at 800-100 ℃ for 30-60 minutes, and cooling in air. And (4) obtaining different rolling reduction amounts by adjusting the distance between the rollers, and finally obtaining the rolled plate.
Step five: controlling annealing crystal boundary engineering, and placing the rolled plate at 600-1000 DEG CAnd (3) preserving heat for 5-10 h in the muffle furnace, and cooling by water to obtain the medium-entropy alloy plate with high corrosion resistance. The corrosion potential of the prepared CoNiFe medium entropy alloy for the corrosion-resistant dynamic seal is-0.55 to-0.11V, and the corrosion current density is 23 to 0.03 mu A/cm2. The corrosion-resistant CoNiFe intermediate entropy alloy prepared by the method can be widely applied to the field of dynamic sealing materials.
As an improvement of the invention, in the fourth preparation step, different rolling reduction amounts are obtained by adjusting the distance between the rollers, the first rolling is performed by adjusting the roller spacing to be 4-9 mm, and the reduction amount is as follows: 10-20%, rolling the cast rod into a plate with the thickness of 4-9 mm; rolling for the second time, adjusting the roller interval to be 3.5-6 mm, and pressing the roller: 30-40%, rolling the cast rod into a plate with the thickness of 3.5-4 mm; and (3) rolling for the third time, adjusting the roller interval to be 3.5-6 mm, and pressing the roller: rolling the cast rod into a plate with the thickness of 2.5-3 mm at 50-60%; rolling for the fourth time, adjusting the roller interval to be 1.5-2 mm, and pressing: 70-80%, rolling the cast rod into a plate with the thickness of 2.5-3 mm; and (3) rolling for the fifth time, adjusting the roller interval to be 1-1.5 mm, and pressing the roller: 80-85% to finally obtain the alloy.
Compared with the prior art, the invention has the following advantages that 1) the CoNiFe entropy alloy for the dynamic seal comprises the following components: the low-sigma CSL alloy is prepared by five steps of vacuum melting, homogenizing treatment, hot forging, controlled rolling, controlled annealing grain boundary engineering and the like, the proportion of special grain boundaries (particularly sigma 3 grain boundaries) in the medium-entropy alloy is regulated and controlled by the grain boundary engineering, the improvement of the low-sigma CSL grain boundary proportion and the interruption of the network connectivity of high-energy random grain boundaries are realized, wherein the proportion of the low-sigma CSL (the proportion of sigma 3 grain boundaries is more than or equal to 29 and less than or equal to 3) is 40-70%, and the proportion of the sigma 3 grain boundaries in the low-sigma CSL grain boundaries is higher than 80%, so that the corrosion resistance of the medium-entropy alloy is effectively improved. The corrosion-resistant CoNiFe intermediate entropy alloy prepared by the method can be widely applied to the field of dynamic sealing materials; 2) the method provided by the invention has high controllability, the required equipment is the most basic equipment in industrial production, and the method is reliable and easy for industrial production and popularization.
The specific implementation mode is as follows:
for the purpose of enhancing an understanding of the present invention, the present invention will be described in detail with reference to the following examples.
Example 1: a corrosion-resistant CoNiFe intermediate entropy alloy for dynamic seal and a preparation method thereof are disclosed, wherein the preparation method comprises five steps of vacuum melting, homogenizing treatment, hot forging, controlled rolling and controlled annealing grain boundary engineering; the low sigma CSL (grain boundary is more than or equal to 3 and less than or equal to 29) proportion of the prepared CoNiFe medium entropy alloy is between 40 and 70 percent, wherein the sigma 3 grain boundary accounts for more than 80 percent of the total proportion of the low sigma CSL. The medium-entropy alloy prepared by the method has strong corrosion resistance;
the method comprises the following specific steps:
(1) vacuum melting, placing granular/block raw materials containing 33.3 atomic% of cobalt, 33.3 atomic% of iron and 33.4 atomic% of nickel (purity is more than 99.99%) into a vacuum melting furnace, and vacuumizing to 5 × 10-3Pa, melting current: 300A, then filling argon until the pressure in the furnace is: 0.5Pa, overturning and repeatedly smelting for 3 times, introducing magnetic stirring and smelting again for 2 times, and finally cooling along with the furnace to form ingots;
(2) homogenizing: placing the cast ingot in a muffle furnace, vacuumizing, filling argon, and preserving heat at 100 ℃ for 12 hours to ensure that elements in the alloy are uniformly distributed;
(3) hot forging: placing the ingot subjected to homogenizing annealing into an induction furnace with the set temperature of 1000 ℃, preserving heat for 20 minutes, and then forging different surfaces of the ingot by adopting a free forging method, wherein the forging frequency is as follows: 240 times/min to finally obtain a cuboid forging stock with the length of 50mm, the width of 10mm and the height of 5 mm;
(4) controlling rolling by using rolling reduction: and (3) preserving the temperature of the forging material alloy at 1000 ℃ for 30 minutes, and cooling in air. By adjusting the distance between the rollers, different rolling reduction amounts are obtained, and finally the plate with the thickness of 1mm is obtained.
(5) Grain boundary engineering: and (3) placing the rolled sample in a muffle furnace at 700 ℃, preserving the temperature for 10h, and cooling with water.
Example 2: the preparation method comprises five steps of vacuum melting, homogenizing treatment, hot forging, controlled rolling and grain boundary annealing control engineering, wherein the low sigma CSL (grain boundary sigma is more than or equal to 3 and less than or equal to 29) proportion of the prepared CoNiFe medium entropy alloy is 40-70%, and the sigma 3 grain boundary accounts for more than 80% of the total proportion of the low sigma CSL. The medium entropy alloy prepared by the method has strong corrosion resistance.
The method comprises the following specific steps:
(1) vacuum melting, placing granular/block raw materials containing 33.3 atomic% of cobalt, 33.3 atomic% of iron and 33.4 atomic% of nickel (purity is more than 99.99%) into a vacuum melting furnace, and vacuumizing to 5 × 10-3Pa, melting current: 300A, then filling argon until the pressure in the furnace is: 0.5Pa, overturning and repeatedly smelting for 3 times, introducing magnetic stirring and smelting again for 2 times, and finally cooling along with the furnace to form ingots;
(2) homogenizing: placing the cast ingot in a muffle furnace, vacuumizing, filling argon, and preserving heat at 100 ℃ for 12 hours to ensure that elements in the alloy are uniformly distributed;
(3) hot forging: placing the ingot subjected to homogenizing annealing into an induction furnace with the set temperature of 1000 ℃, preserving heat for 20 minutes, and then forging different surfaces of the ingot by adopting a free forging method, wherein the forging frequency is as follows: 240 times/min to finally obtain a cuboid forging stock with the length of 50mm, the width of 10mm and the height of 5 mm;
(4) controlling rolling by using rolling reduction: and (3) preserving the temperature of the forging material alloy at 1000 ℃ for 30 minutes, and cooling in air. By adjusting the distance between the rollers, different rolling reduction amounts are obtained, and finally the plate with the thickness of 1mm is obtained.
(5) Grain boundary engineering: and (3) placing the rolled sample in a muffle furnace at 800 ℃, preserving the temperature for 10h, and cooling with water.
Example 3: a corrosion-resistant CoNiFe intermediate entropy alloy for dynamic seal and a preparation method thereof are disclosed, wherein the preparation method comprises five steps of vacuum melting, homogenizing treatment, hot forging, controlled rolling and controlled annealing grain boundary engineering; the low sigma CSL (grain boundary is more than or equal to 3 and less than or equal to 29) proportion of the prepared CoNiFe medium entropy alloy is between 40 and 70 percent, wherein the sigma 3 grain boundary accounts for more than 80 percent of the total proportion of the low sigma CSL. The medium entropy alloy prepared by the method has strong corrosion resistance.
The method comprises the following specific steps:
(1) vacuum smelting: 33.3 atomic percent of cobalt, 33.3 atomic percent of iron and 33.4 atomic percent of nickel (pure cobalt)degree of more than 99.99%) of granular/blocky raw materials are put into a vacuum melting furnace and vacuumized to 5 × 10-3Pa, melting current: 300A, then filling argon until the pressure in the furnace is: 0.5Pa, overturning and repeatedly smelting for 3 times, introducing magnetic stirring and smelting again for 2 times, and finally cooling along with the furnace to form ingots;
(2) homogenizing: placing the cast ingot in a muffle furnace, vacuumizing, filling argon, and preserving heat at 100 ℃ for 12 hours to ensure that elements in the alloy are uniformly distributed;
(3) hot forging: placing the ingot subjected to homogenizing annealing into an induction furnace with the set temperature of 1000 ℃, preserving heat for 20 minutes, and then forging different surfaces of the ingot by adopting a free forging method, wherein the forging frequency is as follows: 240 times/min to finally obtain a cuboid forging stock with the length of 50mm, the width of 10mm and the height of 5 mm;
(4) controlling rolling by using rolling reduction: and (3) preserving the temperature of the forging material alloy at 1000 ℃ for 30 minutes, and cooling in air. By adjusting the distance between the rollers, different rolling reduction amounts are obtained, and finally the plate with the thickness of 1mm is obtained.
(5) Grain boundary engineering: and (3) placing the rolled sample in a muffle furnace at 900 ℃, preserving the temperature for 10h, and cooling with water.
It should be noted that the above-mentioned embodiments are not intended to limit the scope of the present invention, and all equivalent modifications and substitutions based on the above-mentioned technical solutions are within the scope of the present invention as defined in the claims.
Claims (8)
1. The CoNiFe intermediate entropy alloy for the corrosion-resistant dynamic seal and the preparation method thereof are characterized in that the CoNiFe intermediate entropy alloy for the dynamic seal comprises the following components: 5% -35% of cobalt, 5% -35% of iron and the balance of nickel, wherein the grain boundary distribution of the CoNiFe intermediate entropy alloy for corrosion-resistant dynamic sealing is regulated and controlled through grain boundary engineering, the proportion of low sigma CSL (grain boundary sigma is more than or equal to 3 and less than or equal to 29) in the CoNiFe intermediate entropy alloy for corrosion-resistant dynamic sealing is 40% -70%, and the proportion of sigma 3 grain boundary in the low sigma CSL grain boundary is higher than 80%.
2. The CoNiFe entropy alloy for corrosion-resistant dynamic seal and the preparation method thereof according to claim 1 are characterized by comprising the following specific preparation steps:
the method comprises the following steps: the vacuum melting is carried out, and the vacuum melting,
step two: the homogenization treatment is carried out, and the uniform treatment,
step three: the hot forging is carried out, and the hot forging,
step four: the rolling is controlled, and the rolling speed is controlled,
step five: and controlling annealing grain boundary engineering.
3. the CoNiFe intermediate entropy alloy for corrosion-resistant dynamic seal and the preparation method thereof according to claim 2 are characterized in that the first step is vacuum melting, wherein granular/blocky raw materials with the atomic percentages of 5-35% of cobalt, 5-35% of iron and the balance of nickel (the purity is more than 99.99%) are put into a vacuum melting furnace and are vacuumized to 1 × 10-3～5×10-3Pa, melting current: 250-300A, then filling argon until the pressure in the furnace is: 0.1-0.5 Pa, overturning and repeatedly smelting for 2-3 times, introducing magnetic stirring and smelting for 1-3 times, and finally cooling along with the furnace to form ingots.
4. The CoNiFe entropy alloy for corrosion-resistant dynamic seal and the preparation method thereof according to claim 3 are characterized in that the second step is: and (3) homogenizing, namely placing the ingot prepared by vacuum melting in a muffle furnace, vacuumizing, filling argon, and preserving heat at 800-1000 ℃ for 12-24 hours to uniformly distribute elements in the alloy.
5. The CoNiFe entropy alloy for corrosion-resistant dynamic seal and the preparation method thereof according to claim 3 or 4 are characterized in that the third step is: hot forging, namely putting the ingot subjected to homogenizing annealing into an induction furnace with the set temperature of 800-1100 ℃, preserving heat for 10-20 minutes, and then forging different surfaces of the ingot by adopting a free forging method, wherein the forging frequency is as follows: 240 times/min.
6. The CoNiFe entropy alloy for corrosion-resistant dynamic seal and the preparation method thereof according to claim 5 are characterized in that the fourth step is: and (3) controlling rolling, keeping the temperature of the forging material alloy obtained by hot forging at 800-100 ℃ for 30-60 minutes, air cooling, and adjusting the distance between rollers to obtain different rolling reduction amounts so as to finally obtain a rolled plate.
7. The CoNiFe medium entropy alloy for corrosion-resistant dynamic seal and the preparation method thereof according to claim 6 are characterized in that the fifth step is: controlling annealing crystal boundary engineering, placing the rolled sheet in a muffle furnace at 600-1000 ℃, preserving heat for 5-10 h, and cooling by water, wherein the prepared medium-entropy alloy sheet has high corrosion resistance.
8. The CoNiFe entropy alloy for the corrosion-resistant dynamic seal and the preparation method thereof according to claim 6 are characterized in that in the fourth preparation step, different rolling reduction amounts are obtained by adjusting the distance between the rollers, the first rolling is performed by adjusting the roller spacing to 4-9 mm, and the reduction amount is as follows: 10-20%, rolling the cast rod into a plate with the thickness of 4-9 mm; rolling for the second time, adjusting the roller interval to be 3.5-6 mm, and pressing the roller: 30-40%, rolling the cast rod into a plate with the thickness of 3.5-4 mm; and (3) rolling for the third time, adjusting the roller interval to be 3.5-6 mm, and pressing the roller: rolling the cast rod into a plate with the thickness of 2.5-3 mm at 50-60%; rolling for the fourth time, adjusting the roller interval to be 1.5-2 mm, and pressing: 70-80%, rolling the cast rod into a plate with the thickness of 2.5-3 mm; and (3) rolling for the fifth time, adjusting the roller interval to be 1-1.5 mm, and pressing the roller: 80-85%, and finally obtaining the plate with the thickness of 1-1.5 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010616505.6A CN111705254A (en) | 2020-06-30 | 2020-06-30 | CoNiFe intermediate entropy alloy for corrosion-resistant dynamic seal and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010616505.6A CN111705254A (en) | 2020-06-30 | 2020-06-30 | CoNiFe intermediate entropy alloy for corrosion-resistant dynamic seal and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111705254A true CN111705254A (en) | 2020-09-25 |
Family
ID=72543940
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010616505.6A Pending CN111705254A (en) | 2020-06-30 | 2020-06-30 | CoNiFe intermediate entropy alloy for corrosion-resistant dynamic seal and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111705254A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113403518A (en) * | 2021-05-21 | 2021-09-17 | 西北工业大学 | FeCoNiB containing eutectic structurexMulti-principal-element alloy and preparation method thereof |
| CN115233042A (en) * | 2022-06-15 | 2022-10-25 | 广东工业大学 | Co-based Co-Fe-Ni-Al eutectic entropy alloy resistant to high-temperature oxidation and preparation method and application thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1827795A (en) * | 2004-03-01 | 2006-09-06 | 株式会社小松制作所 | Ferrous seal sliding parts and producing method thereof |
| CN108866417A (en) * | 2018-06-07 | 2018-11-23 | 东南大学 | A kind of high strength anti-corrosion medium entropy alloy and preparation method thereof |
| CN110938770A (en) * | 2019-12-26 | 2020-03-31 | 中国科学院兰州化学物理研究所 | Dynamic sealing material and preparation method and application thereof |
| CN111155020A (en) * | 2020-01-20 | 2020-05-15 | 东南大学 | Method for regulating and controlling corrosion resistance of CoNiFe intermediate entropy alloy |
| EP3660178A1 (en) * | 2017-07-26 | 2020-06-03 | Postech Academy-Industry Foundation | Medium-entropy alloy having excellent cryogenic characteristics |
-
2020
- 2020-06-30 CN CN202010616505.6A patent/CN111705254A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1827795A (en) * | 2004-03-01 | 2006-09-06 | 株式会社小松制作所 | Ferrous seal sliding parts and producing method thereof |
| EP3660178A1 (en) * | 2017-07-26 | 2020-06-03 | Postech Academy-Industry Foundation | Medium-entropy alloy having excellent cryogenic characteristics |
| CN108866417A (en) * | 2018-06-07 | 2018-11-23 | 东南大学 | A kind of high strength anti-corrosion medium entropy alloy and preparation method thereof |
| CN110938770A (en) * | 2019-12-26 | 2020-03-31 | 中国科学院兰州化学物理研究所 | Dynamic sealing material and preparation method and application thereof |
| CN111155020A (en) * | 2020-01-20 | 2020-05-15 | 东南大学 | Method for regulating and controlling corrosion resistance of CoNiFe intermediate entropy alloy |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113403518A (en) * | 2021-05-21 | 2021-09-17 | 西北工业大学 | FeCoNiB containing eutectic structurexMulti-principal-element alloy and preparation method thereof |
| CN115233042A (en) * | 2022-06-15 | 2022-10-25 | 广东工业大学 | Co-based Co-Fe-Ni-Al eutectic entropy alloy resistant to high-temperature oxidation and preparation method and application thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111155020B (en) | Method for regulating and controlling corrosion resistance of CoNiFe intermediate entropy alloy | |
| CN106498318B (en) | Improve the process of 2219 aluminium alloy rings comprehensive mechanical properties | |
| CN113235030B (en) | Preparation method of large-size GH4169 high-temperature alloy bar | |
| CN109161780B (en) | Method for improving processing performance of FeCrNiAl-based high-entropy alloy | |
| Gao et al. | Microstructure and properties of forged plasma arc melted pilot ingot of Ti–45Al–8.5 Nb–(W, B, Y) alloy | |
| CN108998649B (en) | Method for improving hydrogen resistance of iron-nickel-based alloy by improving proportion of special crystal boundary | |
| CN111495970A (en) | Rolling method for reducing surface cracking of TC4 titanium alloy smelted in EB (electron beam) furnace | |
| CN111705254A (en) | CoNiFe intermediate entropy alloy for corrosion-resistant dynamic seal and preparation method thereof | |
| CN111996397A (en) | Method for regulating hydrogen embrittlement resistance and corrosion resistance of CoNiV medium-entropy alloy | |
| CN102409258B (en) | Structural homogeneity control method of boron-containing high strength hydrogen resistant brittle alloy | |
| CN108977689B (en) | Metastable beta titanium alloy plate and processing method thereof | |
| CN105002337A (en) | H13 die steel heat treating method and H13 die steel obtained through same | |
| CN112048682B (en) | Processing heat treatment process for medium-entropy alloy plate | |
| CN107523772A (en) | A kind of homogenization process of U720Li high temperature alloys | |
| CN100590210C (en) | Technological process for improving twin boundary amount in gamma' precipitation strengthened type ferrous alloy | |
| CN110964995A (en) | Increase sigma 3 IN IN718 nickel-base superalloynMethod for proportion of type crystal boundary | |
| CN113930693B (en) | Fe-Mn-Al-Ni-Cu super-elastic alloy and preparation method thereof | |
| CN102154600A (en) | Heat treatment method for improving damping stability of medium manganese-manganese-copper alloy | |
| CN115011894A (en) | Production method of TB3 titanium alloy cold-rolled wire for fastener | |
| CN112251684B (en) | Micro-nanocrystalline maraging steel and preparation method thereof | |
| Ma et al. | Hot Processing Maps and Texture Evolution during Hot Compression of CF170 Maraging Stainless Steel | |
| CN114749618A (en) | Production method for reducing mountain scale at edge of hot-rolled 200-series stainless steel coil | |
| CN115074503B (en) | Method for regulating and controlling niobium carbide distribution and size of niobium-containing austenitic stainless steel | |
| CN115245996B (en) | UNS N06030 corrosion-resistant alloy forging and preparation method thereof | |
| CN114769947B (en) | Microalloying method for improving strong plastic matching of titanium alloy welding wire |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200925 |
|
| RJ01 | Rejection of invention patent application after publication |