CN105088002A - Copper-aluminum-iron-nickel-manganese-tungsten-molybdenum alloy with improved thermal fatigue resistant property - Google Patents
Copper-aluminum-iron-nickel-manganese-tungsten-molybdenum alloy with improved thermal fatigue resistant property Download PDFInfo
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Abstract
The invention discloses a copper-aluminum-iron-nickel-manganese-tungsten-molybdenum alloy with an improved thermal fatigue resistant property. The alloy is characterized by being prepared from the following raw materials: electrolytic copper, industrial aluminum ingot No.A00, common rust-free iron nail, electrolytic nickel, electrolytic manganese, pure tungsten, pure molybdenum, and composite rare earth additive. The alloy comprises 10% of Al, 4 to 5% of Fe, 3 to 4% of Ni, 1.5 to 2.5% of Mn, 0.8 to 1.2% of W, 0.4 to 0.6% of Mo, 0 to 1.2% of composite rare earth additive, and the balance being copper. The preparation method comprises the following steps: weighing the raw material according to the weight ratio mentioned above, smelting the raw materials in an induction smelting furnace, after the raw materials are completely smelted, casting the molten mixture into seven copper-aluminum-iron-nickel-manganese-tungsten-molybdenum blanks with different addition amount of composite rare earth additive, wherein the addition amount of the rare earth additive is 0%, 0.2%, 0.4%, 0.6%, 0.8%, 1.0%, and 1.2%; sampling the blanks, processing thermal fatigue samples through linear cutting, and finally carrying out thermal fatigue tests.
Description
Technical field
The invention belongs to copper alloy technical field, refer in particular to a kind of copper ferro-aluminum nickel manganese miramint that can improve thermal fatigue property.
Background technology
Because copper aluminum base alloy has excellent characteristic, more and more receive favor, play an important role in civilian and military industry.The macro property of copper aluminum-based alloy material is subject to the impact of many conditions.But structures shape performance is the eternal rule of nature, and performance is determined by the heterogeneous microstructure of inside.In order to analyze the microstructure of xantal accurately, many good tries are carried out.As utilized the microstructure of the method for colour metallograpy to copper alloy to process, with this come qualitative identification thing phase, crystal grain position to etc. microstructure characteristic.Lay the foundation for putting forward heavy alloyed over-all properties further.
In metallurgical industry, rare earth is often referred to as " VITAMIN " of metallic substance.Be characterized in the rare-earth action of a small amount of even trace in alloy, just can improve its over-all properties significantly.Rare earth element is mainly used in improving hot workability and cast structure in copper alloy, prevents segregation; Obtain high strength, good thermal fatigue property and corrosion resistance nature.In copper alloy, add rare earth element also have certain deoxidation effect, the surface energy of such copper alloy forms layer oxide film, prevents the extraneous medium atom of alloy internally to spread, effectively raises the corrosion resistance nature of alloy.The wear resisting property of copper alloy is also improved by rare earth element.Add rare earth element in copper alloy and can improve the weave construction of copper, mechanical property and electroconductibility.Hardness and the tensile strength of alloy increase along with the increase of ree content, and the plasticity of alloy also arrives good effect simultaneously.McGill metals has that intensity is high, wear resisting property good, castability is excellent, melting technology is simple, power consumption less, the series of advantages such as pollution-free and material cost is low, thus be subject to the most attention of domestic and international expert, therefore McGill metals has the very strong market competitiveness.But it also has the shortcomings such as performance is even not, limits its range of application.In order to expand the range of application of McGill metals, improving the reliability of part, particularly preventing its thermal fatigue fracture at high temperature, needing to improve its thermal fatigue property further.The present invention develops a kind of copper ferro-aluminum nickel manganese miramint that can improve thermal fatigue property.
Summary of the invention
A kind of copper ferro-aluminum nickel manganese miramint that can improve thermal fatigue property, it is characterized by: with electrolytic copper, No. A00, industrial aluminium ingot, common iron nail, electrolytic nickel, electrolytic manganese, pure tungsten, pure molybdenum, the combined rare earth additive not containing rust, (components based on weight percentage is calculated, Nd10-15%, Tb8-12%, V7-10%, Sb7-10%, Ce6-9%, La+Sc+Sm+Er+Yb+Lu+Gd+Nb+Ti+Ba add up to 15-20%, and surplus is copper.) be raw material.Composition counts by weight percentage, the ratio being copper in Al10%, Fe4-5%, Ni3-4%, Mn1.5-2.5%, W0.8-1.2%, Mo0.4-0.6%, combined rare earth additive 0-1.2%, surplus weigh after melting in induction melting furnace.Melting technology is: first add aluminium ingot, electrolytic copper, common iron nail, electrolytic nickel, electrolytic manganese, pure tungsten, pure molybdenum, the combined rare earth additive not containing rust, after material all melts, be incubated 4min-6min when being warming up to 1250 ~ 1300 DEG C and make each element homogenizing, then copper alloy refining deslagging agent is sprinkled into, leave standstill degasification of skimming after 5min-4min, when temperature is 1200 ~ 1250 DEG C, prepare cast.Casting technique is: sand mold casting, base plate is metal mold, the inner water flowing cooling of metal mold, by melted copper ferro-aluminum Magno liquid casting growth 250mm, wide 40mm, the blank of high 70mm, different according to the content adding combined rare earth additive, water and cast out the different copper ferro-aluminum Magno blank of seven groups of combined rare earth additive content, its combined rare earth additive add-on is respectively 0%, 0.2%, 0.4%, 0.6%, 0.8%, 1.0%, 1.2%, sample on blank again, thermal fatigue sample is gone out by linear cutter, thermal fatigue specimen size is long 40mm, wide 10mm, high 5mm, sample top is with v-notch, as shown in Figure 1.
Resistance furnace heating is adopted to carry out thermal fatigue test from constraint thermal fatigue tester.Plate tensile sample is installed on four sides of cube jig, ensures that the heating of every block sample is consistent with cool position, and by the upper and lower vertical movement of transmission mechanism, thus the automatization reaching sample heating and cooling completes.Automatic control when employing is established, thermocouple measurement control temperature, sample carries out the thermal cycling of heating Yu cooling between room temperature 20 DEG C to 450 DEG C, adopts counter to carry out Auto-counting, adjusts and keep furnace temperature 450 DEG C, water temperature 20 DEG C (flowing tap water).Rapid heating sample, heating, cooling are once as a circulation, and each circulating-heating time is 120s, and entering the water cooling time is 5s, until predetermined cycle index.For the sample of research heat fatigue cracking germinating, often circulate 500 times, take off sample, surface film oxide is removed in polishing, and surface measurements crack length, using 0.1mm as crack initiation length, write down sample crack initiation cycle index, observe and taken a picture in the germinating position of crackle.For the sample of research crack propagation of thermal fatigue, often circulate 1000 times, take off sample, polishing is also observed.Surface measurements crack length.Table 1 is for adding the impact of different composite rare earth addition on copper aluminum base alloy crack length.As can be seen from Table 1, when combined rare earth additive add-on is 0.8%-1.0%, copper aluminum base alloy thermal fatigue property is best.
Table 1 copper aluminum base alloy add different composite rare earth addition 20 DEG C-450 DEG C circulation after crack length (mm).
Accompanying drawing explanation
Fig. 1 thermal fatigue specimen size (unit mm)
Fig. 2 does not add combined rare earth additive sample at 20 DEG C-450 DEG C circulations, 9000 crackle figure
Fig. 3 adds combined rare earth additive 0.4% sample at 20 DEG C-450 DEG C circulations, 9000 crackle figure
Fig. 4 adds combined rare earth additive 0.8 sample at 20 DEG C-450 DEG C circulations, 9000 crackle figure
Fig. 5 adds combined rare earth additive 1.2 sample at 20 DEG C-450 DEG C circulations, 9000 crackle figure
Fig. 2-Fig. 5 is the heat fatigue cracking figure of sample after circulation 9000 times of different composite rare earth addition content, found out by Fig. 2, the crackle not adding compound rare-earth interpolation sample becomes thick, germinate and secondary or three crackles, extended mode is the bridging between crackle and crackle, will meet in the tip of crackle and lead crack, make crackle expanded forward; Found out (adding combined rare earth additive 0.4%) by Fig. 3, two lead crack are expanded to equidirectional, and have fine crack to be connected with two lead crack, and now two lead crack obviously reduce; Found out (adding combined rare earth additive 0.8%) by Fig. 4, two lead crack are expanded to equidirectional, but main lead crack is obviously short and small, and have generation secondary or three crackles; Found out (adding combined rare earth additive 1.2%) by Fig. 5, alloy sample crackle increases again, and has all occurred zone of oxidation around, and crackle is expanded wherein.
embodiment
embodiment 1
With electrolytic copper, No. A00, industrial aluminium ingot, common iron nail, electrolytic nickel, electrolytic manganese, pure tungsten, pure molybdenum, the combined rare earth additive not containing rust, (components based on weight percentage is calculated, Nd10-15%, Tb8-12%, V7-10%, Sb7-10%, Ce6-9%, La+Sc+Sm+Er+Yb+Lu+Gd+Nb+Ti+Ba add up to 15-20%, and surplus is copper.) be raw material.Composition counts by weight percentage, the ratio being copper in Al10%, Fe4-5%, Ni3-4%, Mn1.5-2.5%, W0.8-1.2%, Mo0.4-0.6%, combined rare earth additive 0.2%, surplus weigh after melting in induction melting furnace.Melting technology is: first add aluminium ingot, electrolytic copper, common iron nail, electrolytic nickel, electrolytic manganese, pure tungsten, pure molybdenum, the combined rare earth additive not containing rust, after material all melts, be incubated 4min-6min when being warming up to 1250 ~ 1300 DEG C and make each element homogenizing, then copper alloy refining deslagging agent is sprinkled into, leave standstill degasification of skimming after 5min-4min, when temperature is 1200 ~ 1250 DEG C, prepare cast.Casting technique is: sand mold casting, and base plate is metal mold, the inner water flowing cooling of metal mold, by the blank of melted copper ferro-aluminum Magno liquid casting growth 250mm, wide 40mm, high 70mm.Sample on blank, go out thermal fatigue sample by linear cutter, thermal fatigue specimen size is long 40mm, wide 10mm, high 5mm, sample top with v-notch, as shown in Figure 1.
Resistance furnace heating is adopted to carry out thermal fatigue test from constraint thermal fatigue tester.Plate tensile sample is installed on four sides of cube jig, ensures that the heating of every block sample is consistent with cool position, and by the upper and lower vertical movement of transmission mechanism, thus the automatization reaching sample heating and cooling completes.Automatic control when employing is established, thermocouple measurement control temperature, sample carries out the thermal cycling of heating Yu cooling between room temperature 20 DEG C to 450 DEG C, adopts counter to carry out Auto-counting, adjusts and keep furnace temperature 450 DEG C, water temperature 20 DEG C (flowing tap water).Rapid heating sample, heating, cooling are once as a circulation, and each circulating-heating time is 120s, and entering the water cooling time is 5s, until predetermined cycle index.For the sample of research heat fatigue cracking germinating, often circulate 500 times, take off sample, surface film oxide is removed in polishing, and surface measurements crack length, using 0.1mm as crack initiation length, write down sample crack initiation cycle index, observe and taken a picture in the germinating position of crackle.For the sample of research crack propagation of thermal fatigue, often circulate 1000 times, take off sample, polishing is also observed.Surface measurements crack length.As can be seen from Table 1, when combined rare earth additive add-on is 0.4%, copper ferro-aluminum nickel manganese tungsten is after 20 DEG C-450 DEG C circulations 12000 times, and crack length is 0.580mm.
embodiment 2
With electrolytic copper, No. A00, industrial aluminium ingot, common iron nail, electrolytic nickel, electrolytic manganese, pure tungsten, pure molybdenum, the combined rare earth additive not containing rust, (components based on weight percentage is calculated, Nd10-15%, Tb8-12%, V7-10%, Sb7-10%, Ce6-9%, La+Sc+Sm+Er+Yb+Lu+Gd+Nb+Ti+Ba add up to 15-20%, and surplus is copper.) be raw material.Composition counts by weight percentage, the ratio being copper in Al10%, Fe4-5%, Ni3-4%, Mn1.5-2.5%, W0.8-1.2%, Mo0.4-0.6%, combined rare earth additive 0.8%, surplus weigh after melting in induction melting furnace.Melting technology is: first add aluminium ingot, electrolytic copper, common iron nail, electrolytic nickel, electrolytic manganese, pure tungsten, pure molybdenum, the combined rare earth additive not containing rust, after material all melts, be incubated 4min-6min when being warming up to 1250 ~ 1300 DEG C and make each element homogenizing, then copper alloy refining deslagging agent is sprinkled into, leave standstill degasification of skimming after 5min-4min, when temperature is 1200 ~ 1250 DEG C, prepare cast.Casting technique is: sand mold casting, and base plate is metal mold, the inner water flowing cooling of metal mold, by the blank of melted copper ferro-aluminum Magno liquid casting growth 250mm, wide 40mm, high 70mm.Sample on blank, go out thermal fatigue sample by linear cutter, thermal fatigue specimen size is long 40mm, wide 10mm, high 5mm, sample top with v-notch, as shown in Figure 1.
Resistance furnace heating is adopted to carry out thermal fatigue test from constraint thermal fatigue tester.Plate tensile sample is installed on four sides of cube jig, ensures that the heating of every block sample is consistent with cool position, and by the upper and lower vertical movement of transmission mechanism, thus the automatization reaching sample heating and cooling completes.Automatic control when employing is established, thermocouple measurement control temperature, sample carries out the thermal cycling of heating Yu cooling between room temperature 20 DEG C to 450 DEG C, adopts counter to carry out Auto-counting, adjusts and keep furnace temperature 450 DEG C, water temperature 20 DEG C (flowing tap water).Rapid heating sample, heating, cooling are once as a circulation, and each circulating-heating time is 120s, and entering the water cooling time is 5s, until predetermined cycle index.For the sample of research heat fatigue cracking germinating, often circulate 500 times, take off sample, surface film oxide is removed in polishing, and surface measurements crack length, using 0.1mm as crack initiation length, write down sample crack initiation cycle index, observe and taken a picture in the germinating position of crackle.For the sample of research crack propagation of thermal fatigue, often circulate 1000 times, take off sample, polishing is also observed.Surface measurements crack length.As can be seen from Table 1, when combined rare earth additive add-on is 0.8%, copper ferro-aluminum nickel manganese tungsten is after 20 DEG C-450 DEG C circulations 12000 times, and crack length is 0.379mm.
embodiment 3
With electrolytic copper, No. A00, industrial aluminium ingot, common iron nail, electrolytic nickel, electrolytic manganese, pure tungsten, pure molybdenum, the combined rare earth additive not containing rust, (components based on weight percentage is calculated, Nd10-15%, Tb8-12%, V7-10%, Sb7-10%, Ce6-9%, La+Sc+Sm+Er+Yb+Lu+Gd+Nb+Ti+Ba add up to 15-20%, and surplus is copper.) be raw material.Composition counts by weight percentage, the ratio being copper in Al10%, Fe4-5%, Ni3-4%, Mn1.5-2.5%, W0.8-1.2%, Mo0.4-0.6%, combined rare earth additive 1.2%, surplus weigh after melting in induction melting furnace.Melting technology is: first add aluminium ingot, electrolytic copper, common iron nail, electrolytic nickel, electrolytic manganese, pure tungsten, pure molybdenum, the combined rare earth additive not containing rust, after material all melts, be incubated 4min-6min when being warming up to 1250 ~ 1300 DEG C and make each element homogenizing, then copper alloy refining deslagging agent is sprinkled into, leave standstill degasification of skimming after 5min-4min, when temperature is 1200 ~ 1250 DEG C, prepare cast.Casting technique is: sand mold casting, and base plate is metal mold, the inner water flowing cooling of metal mold, by the blank of melted copper ferro-aluminum Magno liquid casting growth 250mm, wide 40mm, high 70mm.Sample on blank, go out thermal fatigue sample by linear cutter, thermal fatigue specimen size is long 40mm, wide 10mm, high 5mm, sample top with v-notch, as shown in Figure 1.
Resistance furnace heating is adopted to carry out thermal fatigue test from constraint thermal fatigue tester.Plate tensile sample is installed on four sides of cube jig, ensures that the heating of every block sample is consistent with cool position, and by the upper and lower vertical movement of transmission mechanism, thus the automatization reaching sample heating and cooling completes.Automatic control when employing is established, thermocouple measurement control temperature, sample carries out the thermal cycling of heating Yu cooling between room temperature 20 DEG C to 450 DEG C, adopts counter to carry out Auto-counting, adjusts and keep furnace temperature 450 DEG C, water temperature 20 DEG C (flowing tap water).Rapid heating sample, heating, cooling are once as a circulation, and each circulating-heating time is 120s, and entering the water cooling time is 5s, until predetermined cycle index.For the sample of research heat fatigue cracking germinating, often circulate 500 times, take off sample, surface film oxide is removed in polishing, and surface measurements crack length, using 0.1mm as crack initiation length, write down sample crack initiation cycle index, observe and taken a picture in the germinating position of crackle.For the sample of research crack propagation of thermal fatigue, often circulate 1000 times, take off sample, polishing is also observed.Surface measurements crack length.As can be seen from Table 1, when combined rare earth additive add-on is 1.2%, copper ferro-aluminum nickel manganese tungsten is after 20 DEG C-450 DEG C circulations 12000 times, and crack length is 0.557mm.
comparative example
With electrolytic copper, No. A00, industrial aluminium ingot, common containing rust iron nail, electrolytic nickel, electrolytic manganese, pure tungsten, pure molybdenum is for raw material.Composition counts by weight percentage, the ratio being copper in Al10%, Fe4-5%, Ni3-4%, Mn1.5-2.5%, W0.8-1.2%, Mo0.4-0.6%, surplus weigh after melting in induction melting furnace.Melting technology is: first add aluminium ingot, electrolytic copper, common iron nail, electrolytic nickel, electrolytic manganese, pure tungsten, the pure molybdenum not containing rust, after material all melts, be incubated 4min-6min when being warming up to 1250 ~ 1300 DEG C and make each element homogenizing, then copper alloy refining deslagging agent is sprinkled into, leave standstill degasification of skimming after 5min-4min, when temperature is 1200 ~ 1250 DEG C, prepare cast.Casting technique is: sand mold casting, and base plate is metal mold, the inner water flowing cooling of metal mold, by the blank of melted copper ferro-aluminum Magno liquid casting growth 250mm, wide 40mm, high 70mm.Sample on blank, go out thermal fatigue sample by linear cutter, thermal fatigue specimen size is long 40mm, wide 10mm, high 5mm, sample top with v-notch, as shown in Figure 1.
Resistance furnace heating is adopted to carry out thermal fatigue test from constraint thermal fatigue tester.Plate tensile sample is installed on four sides of cube jig, ensures that the heating of every block sample is consistent with cool position, and by the upper and lower vertical movement of transmission mechanism, thus the automatization reaching sample heating and cooling completes.Automatic control when employing is established, thermocouple measurement control temperature, sample carries out the thermal cycling of heating Yu cooling between room temperature 20 DEG C to 450 DEG C, adopts counter to carry out Auto-counting, adjusts and keep furnace temperature 450 DEG C, water temperature 20 DEG C (flowing tap water).Rapid heating sample, heating, cooling are once as a circulation, and each circulating-heating time is 120s, and entering the water cooling time is 5s, until predetermined cycle index.For the sample of research heat fatigue cracking germinating, often circulate 500 times, take off sample, surface film oxide is removed in polishing, and surface measurements crack length, using 0.1mm as crack initiation length, write down sample crack initiation cycle index, observe and taken a picture in the germinating position of crackle.For the sample of research crack propagation of thermal fatigue, often circulate 1000 times, take off sample, polishing is also observed.Surface measurements crack length.As can be seen from Table 1, when not adding combined rare earth additive, copper ferro-aluminum nickel manganese tungsten is after 20 DEG C-450 DEG C circulations 12000 times, and crack length is 0.936mm.
Claims (2)
1. one kind can be improved the copper ferro-aluminum nickel manganese miramint of thermal fatigue property, it is characterized by: with electrolytic copper, No. A00, industrial aluminium ingot, common iron nail, electrolytic nickel, electrolytic manganese, pure tungsten, pure molybdenum, the combined rare earth additive not containing rust, components based on weight percentage is calculated, Nd10-15%, Tb8-12%, V7-10%, Sb7-10%, Ce6-9%, La+Sc+Sm+Er+Yb+Lu+Gd+Nb+Ti+Ba add up to 15-20%, surplus is copper, is raw material, composition counts by weight percentage, the ratio being copper in Al10%, Fe4-5%, Ni3-4%, Mn1.5-2.5%, W0.8-1.2%, Mo0.4-0.6%, combined rare earth additive 0-1.2%, surplus weigh after melting in induction melting furnace, melting technology is: first add aluminium ingot, electrolytic copper, common iron nail, electrolytic nickel, electrolytic manganese, pure tungsten, pure molybdenum, the combined rare earth additive not containing rust, after material all melts, be incubated 4min-6min when being warming up to 1250 ~ 1300 DEG C and make each element homogenizing, then copper alloy refining deslagging agent is sprinkled into, leave standstill degasification of skimming after 5min-4min, when temperature is 1200 ~ 1250 DEG C, prepare cast, casting technique is: sand mold casting, base plate is metal mold, the inner water flowing cooling of metal mold, by melted copper ferro-aluminum Magno liquid casting growth 250mm, wide 40mm, the blank of high 70mm, different according to the content adding combined rare earth additive, water and cast out the different copper ferro-aluminum Magno blank of seven groups of combined rare earth additive content, its combined rare earth additive add-on is respectively 0%, 0.2%, 0.4%, 0.6%, 0.8%, 1.0%, 1.2%, sample on blank again, thermal fatigue sample is gone out by linear cutter, thermal fatigue specimen size is long 40mm, wide 10mm, high 5mm, sample top is with v-notch, resistance furnace heating is adopted to carry out thermal fatigue test from constraint thermal fatigue tester, plate tensile sample is installed on four sides of cube jig, ensures that the heating of every block sample is consistent with cool position, and by the upper and lower vertical movement of transmission mechanism, thus the automatization reaching sample heating and cooling completes, automatic control when employing is established, thermocouple measurement control temperature, sample carries out the thermal cycling of heating Yu cooling between room temperature 20 DEG C to 450 DEG C, adopts counter to carry out Auto-counting, adjust and keep furnace temperature 450 DEG C, water temperature 20 DEG C, and flow tap water, rapid heating sample, heating, cooling are once as a circulation, and each circulating-heating time is 120s, and entering the water cooling time is 5s, until predetermined cycle index, for the sample of research heat fatigue cracking germinating, often circulate 500 times, take off sample, surface film oxide is removed in polishing, and surface measurements crack length, using 0.1mm as crack initiation length, write down sample crack initiation cycle index, observe and taken a picture in the germinating position of crackle, for the sample of research crack propagation of thermal fatigue, often circulate 1000 times, take off sample, polishing is also observed, surface measurements crack length.
2. a kind of copper ferro-aluminum nickel manganese miramint that can improve thermal fatigue property according to claim 1, when combined rare earth additive add-on is 0.8%-1.0%, thermal fatigue property is best.
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| CN108085531A (en) * | 2016-11-21 | 2018-05-29 | 宜兴市帝洲新能源科技有限公司 | A kind of Elbow material of ground warm device |
| CN108950294A (en) * | 2018-07-20 | 2018-12-07 | 赵云飞 | A kind of preparation method of albronze material |
| CN110284025A (en) * | 2019-07-29 | 2019-09-27 | 江西省鹰潭铜产业工程技术研究中心 | A kind of aluminum-bronze material and preparation method thereof |
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Application publication date: 20151125 |