CN108179355A - A kind of high-intensity and high-tenacity spring steel wire and its preparation process - Google Patents
A kind of high-intensity and high-tenacity spring steel wire and its preparation process Download PDFInfo
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- CN108179355A CN108179355A CN201810095035.6A CN201810095035A CN108179355A CN 108179355 A CN108179355 A CN 108179355A CN 201810095035 A CN201810095035 A CN 201810095035A CN 108179355 A CN108179355 A CN 108179355A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/04—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of bars or wire
- B21C37/047—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of bars or wire of fine wires
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/34—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of silicon
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- Heat Treatment Of Steel (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Abstract
The present invention discloses a kind of high-intensity and high-tenacity spring steel wire and its preparation process.The spring steel wire is prepared by the raw material of following mass percents, wherein：Fe is 96.2~97%, C is 0.5~0.6%, Si be 1.2~1.6%, Mn be 0.6~0.8%, Cr is 0.6~0.8%, P≤0.015%, S≤0.015%, remaining is nonmetallic inclusion.The present invention is to carry out Q-tempering to the steel wire that wire rod obtains after Wire Drawing to handle to obtain the spring steel wire of high-intensity and high-tenacity, the spring of high allowable stress is obtained after cold rolling forming, destressing temper, shot blasting on surface, pressure and processing using the spring steel wire that the present invention prepares, can be used as the contained spring of automobile clutch transmission and torsion bar structure part；Due to the present invention steel embryo material in do not need to addition precious metal and alloying element dosage it is few, steel embryo material easily obtains, is of low cost, less energy consumption.
Description
Technical field
The present invention relates to a kind of high-intensity and high-tenacity spring steel wire and its preparation processes.
Background technology
With the sternness increasingly of global environmental protection situation, all trades and professions are also penetrated into energy-saving and environment-friendly demand, therefore
Material lightweight is also increasingly paid attention to during automobile and construction machinery production.Spring is in automobile and construction machinery production row
Industry is widely used, in order to meet the material lightweight demand of spring, it is desirable that spring material is tired to high intensity, high stress, height
The direction in service life is developed.Raising for manufacturing the spring steel wire tensile strength of spring is conducive to the allowable stress and fatigue of spring
The raising in service life, and then realize the material lightweight demand of spring.
At present the allowable design stress of spring generally in 900MPa hereinafter, if it is desired to the allowable design stress of spring is promoted
To more than 1100MPa, then the corresponding tensile strength of spring steel wire of manufacture spring is required to have to be larger than 2000MPa.It is meanwhile high tired
The spring material in labor service life does not need only to have high tensile strength, and yield tensile ratio is required to be more than 0.9.It is also contemplated that spring
Cold coiling process is the process of a cold-bending deformation, in order to avoid spring steel wire is broken in process, the modeling to spring steel wire
Property index has certain requirement：Seldom it is broken in coiling process when the contraction percentage of area of spring steel wire >=40%, when
The fracture because of caused by material plasticity will not occur during the contraction percentage of area of spring steel wire >=45% substantially in coiling process.
It is current at home and abroad to produce tensile strength >=2000MPa and ensure the spring steel with certain plasticity
Silk is essentially all using following techniques：Precious metal is added in blank（Such as Ti, V, Ni, Mo, W element）And it suitably carries
The content of high C and Mn, this traditional handicraft can cause the consumption of precious metal resource, and increase the energy in production process and disappear
Consumption, of high cost, energy consumption is big, blank is not easy to obtain.
Invention content
The purpose of the present invention be exactly for the above-mentioned prior art in the presence of shortcoming and to provide a kind of high intensity high
Flexible springs steel wire and its preparation process.Spring steel wire intensity height, the good toughness produced using the preparation process of the present invention, is utilized
The spring steel wire that the present invention prepares can roll into the spring of high allowable stress；Due to not needing to add in the steel embryo material of the present invention
Add precious metal and alloying element dosage is few, therefore steel embryo material easily obtains, is of low cost, less energy consumption.
The purpose of the present invention can be realized by following technique measures：
The high-intensity and high-tenacity spring steel wire of the present invention is prepared by the raw material of following mass percents, wherein：Fe is
96.2~97%, C be 0.5~0.6%, Si be 1.2~1.6%, Mn be 0.6~0.8%, Cr is 0.6~0.8%, P≤0.015%, S
≤ 0.015%, remaining is that the sum of nonmetallic inclusion, the mass percent of each ingredient of above-mentioned raw materials is 100%.
It further says, each chemical composition of the high-intensity and high-tenacity spring steel wire of the present invention is done as described below：
C is 0.5~0.6%：C is most important intensified element in steel, with the raising of C content, the tensile strength of spring steel wire,
Yield strength is significantly improved, and the elasticity attenuation resistance for rolling into spring is also improved；But excessively high C content reduces the toughness of steel.
It is therefore preferable that control C content is 0.5~0.6%.
Si is 1.2~1.6%：Si is present in solution in steel, can be improved the intensity of steel, elastic limit and be bent strong
Than can also improve the quenching degree of steel and anti-temper softening ability；But the Si of too high amount（More than 2.0%）The decarburization of steel can be increased
And graphitization is inclined to, and reduces the toughness and fatigue behaviour of steel.It is therefore preferable that control Si contents are 1.2~1.6%.
Mn is 0.6~0.8%：Mn can increase substantially the quenching degree of steel, increase the relaxation resistance of material, in blank smelting
As important deoxidier and desulfurizing agent during refining；But excessively high Mn contents increase the retained austenite after heat treatment and contain
Amount increases temper brittleness tendency.It is therefore preferable that control Mn contents are 0.6~0.8%.
P≤0.015%：P is harmful element, and the serious plasticity and toughness for reducing steel increases temper brittleness, and is segregated tight
Weight preferably controls P content≤0.015%.
S≤0.015%：S is harmful element, reduces the toughness of steel, increases the red brittleness of steel, is easily segregated, and weakens intercrystalline
Binding force, should strictly control its content, Mn can be used as desulfurizing agent to form MnS, but excessive MnS reduces the fatigability of material
Can, preferably control S content≤0.015%.
Heretofore described nonmetallic inclusion fine line level A class≤1.5, B class≤1.5, C class≤1.0, D class≤1.0.
The preparation process for high-intensity and high-tenacity spring steel wire of the present invention includes the following steps：
（1）Make wire rod：The raw material is subjected to melting, hot rolling, annealing according to the steel embryo material that proportioning obtains, is produced
Specification is the wire rod of 6.5~φ of φ 11mm；
（2）Wire Drawing：To step（1）The wire rod of middle gained be surface-treated and Wire Drawing into specification be φ 4.5
The steel wire of~8.5mm；
（3）Q-tempering processing：To step（2）The steel wire of middle gained carries out Q-tempering processing：Quickly add i.e. in 10~20s
Heat keeps the temperature 10~15s to 900~970 DEG C, is cooled to room temperature through≤2s；Then 410~450 DEG C are heated in 4~7s, is protected
15~25s of temperature, is water-cooled to room temperature, obtains spring steel wire.
The tensile strength of heretofore described spring steel wire is 2100~2300MPa, the contraction percentage of area >=45%, yield tensile ratio
≥0.91；Utilize the allowable design stress >=1200MPa for the spring that the spring steel wire rolls（In view of manufactured spring
High allowable stress, high fatigue life and following process low temperature destressing tempering, need to control the tensile strength of spring steel wire
>=2100MPa, it is contemplated that the difficulty of spring forming and the requirement for rolling lumber recovery, need control spring steel wire tensile strength≤
2300MPa, therefore the tensile strength of the spring steel wire finally obtained in the present invention needs to control in 2100~2300MPa.In order to
Spring steel wire is avoided to be broken during spring is rolled, it is also necessary to from improving the toughness of spring steel wire, that is, control the disconnected of spring steel wire
Face shrinking percentage >=45%, since it typically be considered that spring is rolled up during the steel wire section shrinking percentage >=40% of the common counter of reflection toughness of material
The defects of should not being broken when processed, and controlling the contraction percentage of area >=45% item of steel wire that can reduce material sensibility, improve bullet
The fatigue life of spring.In order to improve the relaxation resistance of spring and resistance to subtracting property of bullet, effective means are to improve bending for spring steel wire
Take intensity, therefore yield tensile ratio >=0.91 of preferred control spring steel wire）.
The design principle of the present invention is as follows：
The present invention is to carry out Q-tempering to the steel wire that wire rod obtains after Wire Drawing to handle to obtain the bullet of high-intensity and high-tenacity
Spring steel wire, the spring steel wire prepared using the present invention is through cold rolling forming, destressing temper, shot blasting on surface, pressure and handles
The spring of high allowable stress is obtained afterwards, can be used as the contained spring of automobile clutch transmission and torsion bar structure part；By
In the present invention steel embryo material in do not need to addition precious metal and alloying element dosage it is few, therefore steel embryo material easily obtain, into
This cheap, less energy consumption.
It further says, the present invention is that the material lightweight demand that spring proposes is designed in order to meet energy conservation and environmental protection
's.Realize that the material lightweight of spring requires to roll spring steel wire that spring uses to high intensity, high stress, high fatigue life
Direction develop.Therefore, it is desirable to reach the material lightweight purpose of spring, effective means are exactly to improve the tension of spring steel wire
Intensity, the raising of spring steel wire tensile strength are conducive to the allowable stress and fatigue behaviour of manufactured spring again.In view of made
The low temperature destressing tempering of the high allowable stress of spring, high fatigue life and following process is made, needs to control the anti-of spring steel wire
Tensile strength >=2100MPa, it is contemplated that the difficulty of spring forming and the requirement for rolling lumber recovery need to control the tension of spring steel wire
Intensity≤2300MPa, thus the tensile strength of the finished product spring steel wire finally obtained in the present invention need to control 2100~
2300MPa.In addition, in order to avoid spring steel wire is broken during spring is rolled, it is also necessary to improve the toughness of spring steel wire, i.e.,
Control the contraction percentage of area >=45% of spring steel wire；It is to improve the relaxation resistance of spring and resistance to subtracting property of bullet, effective means
The yield strength of spring steel wire is improved, that is, controls yield tensile ratio >=0.91 of spring steel wire.It is right to pass through in the preparation process of the present invention
The steel wire that wire rod obtains after Wire Drawing carries out Q-tempering and handles to obtain tensile strength as 2100~2300MPa, section receipts
Shrinkage >=45%, the spring steel wire of the high-intensity and high-tenacity of yield tensile ratio >=0.91；The spring rolled into using the spring steel wire
Allowable design stress >=1200MPa.Quenching treatment in the present invention is will be after Wire Drawing using the method for Frequency Induction Heating
Obtained steel wire is heated rapidly to austenitizing temperature, and steel wire carries out austenitizing, is then quickly cooled to room temperature.Quenched
Hardening heat is very big to the toughness, intensity and Influence of Fatigue Properties of steel wire in journey, inclined in order to eliminate the ingredient of steel blank as possible
Thinner original quenched martensite is analysed and obtained, its austenitizing temperature, but excessively high austenitizing temperature meeting should be improved as possible
Coarse grains, toughness is caused to reduce, are 900~970 DEG C it is advantageous to quenching temperature；And heating time control 10~
In 20s, the trend that crystal grain is grown up can be inhibited by carrying out quick heating, be conducive to the raising of steel wire toughness and fatigue behaviour；Then
The heat preservation of the 10~15s carried out, then be conducive to the abundant austenitizing of material, the practical insulating process of 10~15s is slow
Process air cooler；It is quickly cooled down after 10~15s of heat preservation, cooling velocity is faster, and obtained martensitic crystal grains are smaller, that is, improve
The intensity of steel wire, plasticity, relaxation resistance, but excessively high cooling velocity easily makes steel wire generate change because transformation stress is excessive again
Shape and cracking, thus the present invention can make austenitizing in≤2s by using special cooling device after the fast quickly cooling of steel wire
But room temperature is arrived without being deformed and cracking, this contributes to steel wire still to keep good toughness under high intensity.
The advantageous effects of the present invention are as follows：
Spring steel wire intensity height, the good toughness produced using the preparation process of the present invention, the spring steel that the present invention is utilized to prepare
Silk can roll into the spring of high allowable stress；Due to not needing to addition precious metal and alloy member in the steel embryo material of the present invention
Plain dosage is few, therefore steel embryo material easily obtains, is of low cost, less energy consumption.
Specific embodiment
The present invention is further described with reference to embodiments：
Embodiment one
In the present embodiment, steel embryo material is prepared by following raw material proportionings first：Fe is that 96.65 %, C 0.56%, Si are
1.41%, Mn 0.7%, Cr 0.67%, P 0.003%, S 0.002%, remaining is nonmetallic inclusion, each ingredient of above-mentioned raw materials
The sum of mass percent be 100%.And the steel embryo material of preparation is inspected by random samples after being rolled into wire rod, respectively choose 1,2,
3rd, 4 four wire rod samples carry out the inspection of tetra- class nonmetal inclusion of A, B, C, D, and inspection result is as shown in table 1-1.
The nonmetal inclusion inspection result of tetra- wire rod samples of table 1-1
| Number | A | B | C | D |
| 1 | 1.5 | 1 | 0.5 | 0 |
| 2 | 1 | 1 | 0 | 0 |
| 3 | 1 | 1.5 | 0 | 0.5 |
| 4 | 1 | 1 | 0.5 | 0.5 |
The technique for preparing high-intensity and high-tenacity spring steel wire in the present embodiment includes the following steps：
（1）Make wire rod：The steel embryo material obtained in the present embodiment is subjected to melting, hot rolling, annealing, producing specification is
The four discharge plate bar samples of φ 6.5mm；
（2）Wire Drawing：To step（1）Middle gained specification is surface-treated for the four discharge plate bar samples of φ 6.5mm and wire drawing
It is processed into four kinds of steel wire samples that specification is φ 5.0mm；
（3）Q-tempering processing：To step（2）Four kinds of steel wire samples of middle gained carry out Q-tempering processing：I.e. in 10~20s
It is inside heated rapidly to 900~970 DEG C, keeps the temperature 10~15s, be cooled to room temperature through≤2s；Then it is heated to 410 in 4~7s~
450 DEG C, 15~25s is kept the temperature, room temperature is water-cooled to, obtains spring steel wire.Four kinds of steel wire samples are carried out at Q-tempering respectively
The actual conditions of reason are as shown in table 1-2.
Tetra- kinds of steel wire samples of table 1-2 carry out the condition of Q-tempering processing
| Number | Hardening heat DEG C | Quench heating time s | Quenching Soaking Time s | Temperature DEG C | It is tempered heating time s | Tempering insulation time s |
| 1 | 910 | 10 | 12 | 420 | 5 | 16 |
| 2 | 930 | 10 | 12 | 440 | 5 | 16 |
| 3 | 950 | 10 | 12 | 430 | 5 | 16 |
| 4 | 970 | 10 | 12 | 450 | 5 | 16 |
The mechanical property of four kinds of spring steel wire samples of final gained is as shown in table 1-3.
The mechanical property of table 1-3 four kinds of spring steel wire samples of final gained
| Number | Tensile strength MPa | Contraction percentage of area % | Yield tensile ratio |
| 1 | 2288 | 49 | 0.925 |
| 2 | 2075 | 53 | 0.912 |
| 3 | 2204 | 51 | 0.918 |
| 4 | 2107 | 53 | 0.929 |
Embodiment two
In the present embodiment, steel embryo material is prepared by following raw material proportionings first：Fe is that 96.82 %, C 0.54%, Si are
1.26%, Mn 0.67%, Cr 0.69%, P 0.004%, S 0.011%, remaining is nonmetallic inclusion, each ingredient of above-mentioned raw materials
The sum of mass percent be 100%.And the steel embryo material of preparation is inspected by random samples after being rolled into wire rod, respectively choose 1,2,
3rd, 4 four wire rod samples carry out the inspection of tetra- class nonmetal inclusion of A, B, C, D, and inspection result is as shown in table 2-1.
The nonmetal inclusion inspection result of tetra- wire rod samples of table 2-1
| Number | A | B | C | D |
| 1 | 1 | 1 | 0.5 | 0 |
| 2 | 1 | 1 | 0 | 0 |
| 3 | 1 | 0 | 0.5 | 0.5 |
| 4 | 1 | 1 | 0.5 | 0.5 |
The technique for preparing high-intensity and high-tenacity spring steel wire in the present embodiment includes the following steps：
（1）Make wire rod：The steel embryo material sample obtained in the present embodiment is subjected to melting, hot rolling, annealing, produces rule
Lattice are the four discharge plate bar samples of φ 8.0mm；
（2）Wire Drawing：To step（1）Middle gained specification is surface-treated for the four discharge plate bar samples of φ 8.0mm and wire drawing
It is processed into four kinds of steel wire samples that specification is φ 6.0mm；
（3）Q-tempering processing：To step（2）Four kinds of steel wire samples of middle gained carry out Q-tempering processing：I.e. in 10~20s
It is inside heated rapidly to 900~970 DEG C, keeps the temperature 10~15s, be cooled to room temperature through≤2s；Then it is heated to 410 in 4~7s~
450 DEG C, 15~25s is kept the temperature, room temperature is water-cooled to, obtains spring steel wire.Four kinds of steel wire samples are carried out at Q-tempering respectively
The actual conditions of reason are as shown in table 2-2.
Tetra- kinds of steel wire samples of table 2-2 carry out the condition of Q-tempering processing
| Number | Hardening heat DEG C | Quench heating time s | Quenching Soaking Time s | Temperature DEG C | It is tempered heating time s | Tempering insulation time s |
| 1 | 950 | 14 | 13 | 425 | 7 | 20 |
| 2 | 950 | 12 | 11 | 425 | 6 | 18 |
| 3 | 950 | 10 | 10 | 425 | 5 | 16 |
| 4 | 950 | 10 | 10 | 415 | 5 | 16 |
The mechanical property of four kinds of spring steel wire samples of final gained is as shown in table 2-3.
The mechanical property of table 2-3 four kinds of spring steel wire samples of final gained
| Number | Tensile strength MPa | Contraction percentage of area % | Yield tensile ratio |
| 1 | 2256 | 51 | 0.919 |
| 2 | 2247 | 54 | 0.927 |
| 3 | 2251 | 52.5 | 0.914 |
| 4 | 2299 | 50 | 0.924 |
Embodiment three
In the present embodiment, steel embryo material is prepared by following raw material proportionings first：Fe is 96.38%, C 0.58%, Si are
1.54%, Mn 0.77%, Cr 0.72%, P 0.002%, S 0.005%, remaining is nonmetallic inclusion, each ingredient of above-mentioned raw materials
The sum of mass percent be 100%.And the steel embryo material of preparation is inspected by random samples after being rolled into wire rod, respectively choose 1,2,
3rd, 4 four wire rod samples carry out the inspection of tetra- class nonmetal inclusion of A, B, C, D, and inspection result is as shown in table 3-1.
The nonmetal inclusion inspection result of tetra- steel embryo material samples of table 3-1
| Number | A | B | C | D |
| 1 | 1 | 1.5 | 0.5 | 0 |
| 2 | 1 | 1 | 0 | 0 |
| 3 | 1 | 0 | 0 | 0.5 |
| 4 | 1 | 1 | 0.5 | 0.5 |
The technique for preparing high-intensity and high-tenacity spring steel wire in the present embodiment includes the following steps：
（1）Make wire rod：The steel embryo material sample obtained in the present embodiment is subjected to melting, hot rolling, annealing, produces rule
Lattice are the four discharge plate bar samples of φ 11mm；
（2）Wire Drawing：To step（1）Middle gained specification is surface-treated for the four discharge plate bar samples of φ 11mm and wire drawing
It is processed into four kinds of steel wire samples that specification is φ 8.0mm；
（3）Q-tempering processing：To step（2）Four kinds of steel wire samples of middle gained carry out Q-tempering processing：I.e. in 10~20s
It is inside heated rapidly to 900~970 DEG C, keeps the temperature 10~15s, be cooled to room temperature through≤2s；Then it is heated to 410 in 4~7s~
450 DEG C, 15~25s is kept the temperature, room temperature is water-cooled to, obtains spring steel wire.Four kinds of steel wire samples are carried out at Q-tempering respectively
The actual conditions of reason are as shown in table 3-2.
Tetra- kinds of steel wire samples of table 3-2 carry out the condition of Q-tempering processing
| Number | Hardening heat DEG C | Quench heating time s | Quenching Soaking Time s | Temperature DEG C | It is tempered heating time s | Tempering insulation time s |
| 1 | 950 | 20 | 15 | 420 | 7 | 25 |
| 2 | 950 | 20 | 15 | 420 | 7 | 25 |
| 3 | 950 | 20 | 15 | 420 | 7 | 25 |
| 4 | 950 | 20 | 15 | 420 | 7 | 25 |
The mechanical property of four kinds of spring steel wire samples of final gained is as shown in table 3-3.
The mechanical property of table 3-3 four kinds of spring steel wire samples of final gained
| Number | Tensile strength MPa | Contraction percentage of area % | Yield tensile ratio |
| 1 | 2202 | 52.5 | 0.920 |
| 2 | 2214 | 54 | 0.925 |
| 3 | 2208 | 51 | 0.927 |
| 4 | 2209 | 53 | 0.919 |
Claims (4)
1. a kind of high-intensity and high-tenacity spring steel wire, it is characterised in that：It is prepared by the raw material of following mass percents,
Wherein：Fe is 96.2~97%, C is 0.5~0.6%, Si be 1.2~1.6%, Mn be 0.6~0.8%, Cr is 0.6~0.8%, P≤
0.015%th, S≤0.015%, remaining is that the sum of nonmetallic inclusion, the mass percent of above-mentioned raw materials is 100%.
2. high-intensity and high-tenacity spring steel wire according to claim 1, it is characterised in that：The nonmetallic inclusion is carefully grade
Other A class≤1.5, B class≤1.5, C class≤1.0, D class≤1.0.
3. a kind of technique for being used to prepare high-intensity and high-tenacity spring steel wire described in claim 1, it is characterised in that：The work
Skill includes the following steps：
（1）Make wire rod：The raw material is subjected to melting, hot rolling, annealing according to the steel embryo material that proportioning obtains, is produced
Specification is the wire rod of 6.5~φ of φ 11mm；
（2）Wire Drawing：To step（1）The wire rod of middle gained be surface-treated and Wire Drawing into specification be φ 4.5
The steel wire of~8.5mm；
（3）Q-tempering processing：To step（2）The steel wire of middle gained carries out Q-tempering processing：Quickly add i.e. in 10~20s
Heat keeps the temperature 10~15s to 900~970 DEG C, is cooled to room temperature through≤2s；Then 410~450 DEG C are heated in 4~7s, is protected
15~25s of temperature, is water-cooled to room temperature, obtains spring steel wire.
4. preparation process according to claim 3, it is characterised in that：The tensile strength of the spring steel wire for 2100~
2300MPa, the contraction percentage of area >=45%, yield tensile ratio >=0.91；The design of spring rolled using the spring steel wire is allowable
Stress >=1200MPa.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109108103A (en) * | 2018-08-07 | 2019-01-01 | 辽宁通达建材实业有限公司 | The prestress wire production technology that tensile strength is 2300MPa grades |
| CN109226325A (en) * | 2018-08-21 | 2019-01-18 | 贵州钢绳股份有限公司 | A kind of manufacturing method of spring steel wire |
| CN109252103A (en) * | 2018-11-02 | 2019-01-22 | 太仓卡兰平汽车零部件有限公司 | A kind of spring highly resistance steel wire and its processing method |
| CN111334708A (en) * | 2020-03-05 | 2020-06-26 | 马鞍山钢铁股份有限公司 | High-strength spring steel with tensile strength of more than or equal to 2250MPa and excellent fatigue performance and production method thereof |
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| CN114769351A (en) * | 2022-03-30 | 2022-07-22 | 厦门立洲五金弹簧有限公司 | Manufacturing process of high-stress spring |
| CN115094335A (en) * | 2022-07-22 | 2022-09-23 | 李家华 | Automobile tail door spring steel wire and preparation method thereof |
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| EP4063531A4 (en) * | 2019-12-20 | 2023-12-06 | Posco | Wire rod for ultra-high strength spring, steel wire and manufacturing method thereof |
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| CN112143869A (en) * | 2020-09-27 | 2020-12-29 | 广州市奥赛钢线科技有限公司 | Preparation process of quenched and tempered spring steel wire with tensile strength of 2300-2400 MPa |
| CN115505837A (en) * | 2021-06-23 | 2022-12-23 | 浙江武义和平金属制品有限公司 | High-toughness steel wire and preparation method thereof |
| CN114769351A (en) * | 2022-03-30 | 2022-07-22 | 厦门立洲五金弹簧有限公司 | Manufacturing process of high-stress spring |
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Application publication date: 20180619 |