CN114318125A - High-strength and high-toughness alloy tool steel wire and manufacturing method thereof - Google Patents
High-strength and high-toughness alloy tool steel wire and manufacturing method thereof Download PDFInfo
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- 229910052729 chemical element Inorganic materials 0.000 claims abstract description 10
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Abstract
The invention discloses a high-strength and high-toughness alloy tool steel wire which contains the following chemical elements in percentage by mass besides Fe: c: 0.60-0.90 wt.%, Si: 1.00-3.00 wt.%, Mn: 0.45-1.00 wt.%, Cr: 0.45-1.00 wt.%, Mo: 0.20-0.60 wt.%; wherein the microstructure of the high-strength and high-toughness alloy tool steel wire is tempered martensite and spherical carbide which is dispersed and distributed. In addition, the invention also discloses a manufacturing method of the high-strength and high-toughness alloy tool steel wire rod, which comprises the following steps: (1) smelting, casting and rolling into a wire rod; (2) off-line spheroidizing annealing; (3) after the wire rod is manufactured through the processing procedure, quenching and tempering heat treatment is carried out: heating to the austenitizing temperature of 820-960 ℃, preserving heat for 0.5-1 h, quenching and cooling to room temperature at the speed of 1-50 ℃/s; and (4) heating to 200-400 ℃ again for tempering, and keeping the temperature for 0.5-3 h. The high-strength and high-toughness alloy tool steel wire rod has excellent torsion fracture resistance and can be effectively applied to the field of hardware tools.
Description
Technical Field
The invention relates to a metal material and a manufacturing method thereof, in particular to an alloy tool steel wire and a manufacturing method thereof.
Background
Tool steel is a generic name for high-quality steels used for various tools, cutting tools, measuring tools, etc. which require high hardness, toughness, and wear resistance. Tool steels can be classified into carbon tool steels, alloy tool steels and high speed tool steels according to alloy composition. Based on the service condition of the tool steel, the following characteristics are generally required: (1) the hardness is high at the use temperature, and the wear resistance is good; (2) good heat treatment performance, difficult generation of quenching cracking and good tempering stability; (3) the material has certain toughness, impact resistance, torsion resistance or bending load resistance and other properties; (4) has special performances of corrosion resistance, red hardness and the like.
Carbon tool steel generally has a carbon content of 0.6-1.5%, has a metallographic structure of quenched martensite + granular carbide, is mainly subjected to quenching and tempering in a heat treatment process, has the characteristics of hard surface and soft core, and is widely applied to shear blades, blanking dies, reamers, lathe tools, woodworking tools, band saws and the like, and the hardness and wear resistance of the carbon tool steel mainly depend on the carbon content. The high-speed tool steel contains a large amount of alloying elements such as W, Cr, Mo, V, Co and the like, has the characteristics of good red hardness, good wear resistance, high strength and the like, and is mainly used for manufacturing high-efficiency cutting tools, dies, rollers, high-temperature bearings, high-temperature springs and the like with high requirements on manufacturing performance. The high-speed tool steel may be classified into tungsten-based high-speed steel, tungsten-molybdenum-based high-speed steel, high-molybdenum-based high-speed steel, vanadium-based high-speed steel, cobalt-based high-speed steel, and the like, according to alloy elements.
Such steels, in which certain alloying elements are added on the basis of carbon tool steels, are collectively called alloy tool steels in order to improve the mechanical properties and hardenability of the tool steels.
The alloy tool steel in GB/T1299-. The alloy tool steel has more brands, and the performances and the purposes of different component steel grades are different, so that the alloy tool steel is mainly used for the wire rod product in the hardware tool industry, and has higher requirements on the hardness, the toughness and the wear resistance of steel, such as a hexagonal wrench, a screwdriver, a tool sleeve, a clamp and the like.
The grades of the bar wire tool steel produced by domestic iron and steel enterprises mainly comprise SAE6150/50CrVA, SUP11, 9SiCr and the like, the alloy tool steel is added with Cr and V elements on the basis of common carbon tool steel, the alloy system is simpler, the comprehensive performance is general, and the space for improving the torsional toughness, the wear resistance and the like is greatly increased.
At the present stage, the main problems existing in the tool steel industry in China are that the performance of low-end tool steel products needs to be improved, high-end products completely depend on import, the cost is very high, and the market requirements cannot be met. Therefore, there is a need to develop a high-quality alloy tool steel product that can meet the market demand.
The Chinese patent document with the publication number of CN1422972A and the publication number of 2003, 6 and 11, entitled "a high-strength alloy tool steel" discloses a high-strength alloy tool steel which is applied to the field of cutting tools, rock breaking tools and die manufacturing, adopts high-temperature quenching at 1100-1200 ℃ and three tempering treatments at 500-580 ℃, has the highest hardness of 58-62 HRC and the structure of tempered martensite and uniform and fine carbides, but in a heat treatment process, the overhigh austenitizing temperature easily causes coarse grains, the tempering times are many, and the production cost is increased.
Chinese patent publication No. CN110791717A, entitled "high-quality hypoeutectoid alloy tool steel wire rod and method for producing same", published as 2/14/2020, discloses a method for producing a high-quality hypoeutectoid alloy tool steel wire rod, which contains alloy components of C: 0.63-0.68%, Si: 1.10 to 1.20%, Mn: 0.60-0.70%, P is less than or equal to 0.025%, S is less than or equal to 0.025%, Cr: 0.30-0.40%, Mo: 0.50-0.60%, V: 0.20-0.30%, Ni: 0.10-0.20% and Cu is less than or equal to 0.25%, the tool steel wire structure obtained by the controlled rolling and controlled cooling technology consists of ferrite, granular pearlite and carbide, the hardness is 15-25 HRC, the subsequent drawing and machining are facilitated, but the carbon content in the alloy is low, and the subsequent modulation heat treatment is not involved.
Chinese patent publication No. CN107419175A, published as 2017, 12, month, and 1 entitled "economical tool steel with good fatigue life and method for producing same", discloses a method for producing economical tool steel with good fatigue life, which comprises the following alloy components: c: 0.75 to 1.00%, Si: 0.15 to 0.35%, Mn: 0.50-1.20%, Cr: 0.30-1.10%, V: 0.05-0.20%, Alt is less than or equal to 0.040%, P is less than or equal to 0.020%, S is less than or equal to 0.010%, N is less than or equal to 0.006%, a uniform granular pearlite structure is obtained after hot rolling and annealing, and a fine tempered martensite structure is obtained after quenching and tempering.
In summary, in order to overcome the defects in the prior art, the invention provides a high-toughness alloy tool steel wire and a manufacturing method thereof, the high-toughness alloy tool steel wire has significant advantages in wear resistance and torsional fracture resistance, has good hardness and excellent torsional toughness, can be effectively applied to high-end products in the hardware tool industry, and has very important practical significance.
Disclosure of Invention
One of the objectives of the present invention is to provide a high toughness alloy tool steel wire rod, which has significant advantages in wear resistance and torsional fracture resistance, and has good hardness and excellent torsional toughness. The Rockwell hardness of the high-toughness alloy tool steel wire is 58-62 HRC, the torsion angle per unit length is higher than 10 degrees/mm, the high-toughness alloy tool steel wire has excellent torsion fracture resistance, can be effectively applied to high-end products in the hardware tool industry, and has very important practical significance.
In order to achieve the above object, the present invention provides a high-toughness alloy tool steel wire rod which contains, in addition to Fe and inevitable impurities, the following chemical elements in mass percent:
C：0.60～0.90wt.％、Si：1.00～3.00wt.％、Mn：0.45～1.00wt.％、Cr：0.45～1.00wt.％、Mo：0.20～0.60wt.％；
wherein the microstructure of the high-strength and high-toughness alloy tool steel wire is tempered martensite and spherical carbide which is dispersed and distributed.
Further, in the high-strength and high-toughness alloy tool steel wire rod, the mass percentages of all chemical elements are as follows:
c: 0.60-0.90 wt.%, Si: 1.00-3.00 wt.%, Mn: 0.45-1.00 wt.%, Cr: 0.45-1.00 wt.%, Mo: 0.20-0.60 wt.%; the balance being Fe and other unavoidable impurities.
In the high-strength and high-toughness alloy tool steel wire rod, the design principle of each chemical element is as follows:
c: in the high-strength and high-toughness alloy tool steel wire rod, C is the most important element, on one hand, the C can play a solid solution strengthening role in the steel, and on the other hand, the C can form various carbides. It should be noted that, when the content of C element in the alloy tool steel is too low, it is difficult to ensure the hardness and wear resistance of the steel; when the content of C element in steel is too high, it may adversely affect the toughness of steel, making segregation difficult to control, increasing the difficulty of smelting and rolling, and easily generating abnormal structures such as network carbide. Therefore, in consideration of the influence of the element C on the performance of the high-strength and high-toughness alloy tool steel wire rod in the technical scheme, the mass percent of the element C in the high-strength and high-toughness alloy tool steel wire rod is controlled to be 0.60-0.90 wt.%.
Si: in the high-strength and high-toughness alloy tool steel wire rod, Si is a non-carbide forming element, and the Si element has a strong solid solution strengthening effect in steel, so that the hardness of the tool steel can be effectively improved. However, it should be noted that the content of Si element in steel should not be too high, and when the content of Si element in steel is too high, the toughness of steel is lowered. Therefore, in the high-strength and high-toughness alloy tool steel wire rod, the mass percent of Si element is controlled to be 1.00-3.00 wt.%.
Mn: in the high-strength and high-toughness alloy tool steel wire rod, Mn element can effectively improve the hardenability of the steel, improve the stability of austenite, delay pearlite transformation and improve impact toughness. In consideration of the requirement of the high-strength and high-toughness alloy tool steel wire rod on hardenability, the mass percent of Mn element is controlled to be 0.45-1.00 wt.%.
Cr: in the high-strength and high-toughness alloy tool steel wire rod, Cr element can effectively improve the hardenability, the hardenability and the tempering stability of steel. Cr is a carbide-forming element which forms carbide with C in steel and also acts as a strengthening effect by being dissolved in ferrite. Therefore, the high-strength and high-toughness alloy tool steel wire rod is characterized in that the mass percent of Cr element is controlled to be 0.45-1.00 wt.% by comprehensively considering the strengthening effect and the production cost.
Mo: in the high-strength and high-toughness alloy tool steel wire rod, Mo is a strong carbide forming element, and can be combined with C to form special carbide and improve the hardenability and the tempering secondary hardening strength of the steel. The strengthening effect and the production cost are comprehensively considered, and the mass percent of Mo element in the high-strength and high-toughness alloy tool steel wire rod is controlled to be 0.20-0.60 wt.%.
Further, in the high strength and toughness alloy tool steel wire rod, at least one of the following chemical elements is contained:
0＜V≤0.30wt.％；
0＜Ni≤0.50wt.％；
0＜Nb≤0.05wt.％。
in the technical scheme of the invention, V, Ni and Nb can further improve the quality and performance of the high-strength and high-toughness alloy tool steel wire rod.
It should be noted that the Ni element mainly plays a role in reducing the low-temperature brittle transition temperature in the steel, and can improve the strength of the steel without significantly reducing the toughness, improve the corrosion resistance of the steel, reduce the notch sensitivity of the steel, and improve the fatigue performance. In the high-toughness alloy tool steel wire rod, the mass percent of Ni can be controlled to be more than 0 and less than or equal to 0.50wt percent by comprehensively considering the beneficial effect and the cost of the Ni.
Accordingly, V and Nb elements, which are both strong carbonitride forming elements, can be added to the steel as microalloying elements, and they mainly play a role in refining grains, and are beneficial to toughness while increasing the hardness of the tool steel. However, it should be noted that the contents of V and Nb in the steel should not be too high, and when the contents of V and Nb are too high, the production cost is increased. Therefore, in the high-strength and high-toughness alloy tool steel wire rod, the mass percent of V is controlled to be more than 0 and less than or equal to 0.30 wt.%, and the mass percent of Nb is controlled to be more than 0 and less than or equal to 0.05 wt.%.
Further, in the high strength and toughness alloy tool steel wire rod according to the present invention, among other inevitable impurities: p ≦ 0.015 wt.%, and/or S ≦ 0.015 wt.%.
In the technical scheme of the invention, the P element and the S element are impurity elements in the high-strength and high-toughness alloy tool steel wire rod, and the content of the impurity elements in the high-strength and high-toughness alloy tool steel wire rod is reduced as far as possible in order to obtain steel with better performance and better quality under the permission of technical conditions.
It should be noted that both impurity elements P and S are easy to generate segregation at grain boundaries, reduce the toughness of steel, and have a large influence on the cold workability of steel, so the content of P, S element in steel must be strictly controlled, P is controlled to be equal to or less than 0.015 wt.%, and S is controlled to be equal to or less than 0.015 wt.%.
Further, in the high-toughness alloy tool steel wire rod, the grain size of the spherical carbide is 0.1-3 μm.
Furthermore, in the high-strength and high-toughness alloy tool steel wire rod, the Rockwell hardness is 58-62 HRC, and the torsion angle of the unit length is higher than 10 degrees/mm.
Furthermore, in the high-strength and high-toughness alloy tool steel wire rod, the torsion angle per unit length is 10 degrees/mm-15 degrees/mm.
Accordingly, another object of the present invention is to provide a method for manufacturing a high toughness alloy tool steel wire, wherein the high toughness alloy tool steel wire obtained by the method has not only good hardness, but also excellent torsional toughness, and can meet the requirements of wear resistance and torsional fracture resistance of high-end products in the hardware tool industry.
In order to achieve the above object, the present invention provides a method for manufacturing the high strength and toughness alloy tool steel wire rod, comprising the steps of:
(1) smelting, casting and rolling into a wire rod;
(2) off-line spheroidizing annealing;
(3) after the wire rod is manufactured through the processing procedure, quenching and tempering heat treatment is carried out: heating to the austenitizing temperature of 820-960 ℃, preserving heat for 0.5-1 h, quenching and cooling to room temperature at the speed of 1-50 ℃/s; and (4) heating to 200-400 ℃ again for tempering, and keeping the temperature for 0.5-3 h.
The manufacturing method of the high-strength and high-toughness alloy tool steel wire rod is based on scientific and reasonable alloy component design, the wire rod with the diameter of 8-12 mm can be obtained by smelting, casting and rolling into a wire rod and controlling the cooling technology, the structure and the plasticity of the wire rod are optimized by using an off-line isothermal spheroidizing annealing process, the subsequent drawing processing efficiency is improved, and finally the alloy tool steel wire rod with the Rockwell hardness of 58-62 HRC and the torsion angle of unit length higher than 10 degrees/mm can be obtained by matching with quenching and tempering heat treatment.
In the step (1), after the wire rod is rolled, in some embodiments, slow cooling measures may be taken when passing through a stelmor air cooling line, and the specific operations may be: and (3) closing all fans and covering a heat-insulating cover through a stelmor air cooling line, and reducing the cooling rate of the wire rod. This is done because: and after rolling, the wire rod is slowly cooled when passing through a stelmor air cooling line, so that the martensite content in the structure can be reduced, and the fracture in the subsequent bundling and transportation process can be avoided.
In addition, in the step (2), the rolled wire rod is subjected to an offline spheroidizing annealing process, so that a spherical carbide structure with dispersion distribution and 0.1-3 mu m of particle size can be effectively obtained.
Further, in the manufacturing method, in the step (2), the temperature of the wire rod is increased to 775-840 ℃ along with the furnace, the temperature is kept for 4-6 h, the wire rod is cooled to 710-750 ℃ at the speed of 10-50 ℃/h and kept for 4-7 h, and then the wire rod is cooled to be less than or equal to 600 ℃ at the speed of 10-50 ℃/h and taken out of the furnace.
Further, in the manufacturing method of the present invention, in the step (3), when the austenitizing temperature is 850 to 960 ℃, oil is used as the quenching cooling medium.
In the above technical solution, in step (3) of the manufacturing method of the present invention, the cooling rate needs to be controlled in the quenching and tempering heat treatment process. When the austenitizing temperature is 850-960 ℃, oil can be adopted as a quenching cooling medium, so that the cracking tendency of the product is reduced.
Compared with the prior art, the high-strength and high-toughness alloy tool steel wire and the manufacturing method thereof have the advantages and beneficial effects as follows:
the invention can obtain the high-strength and high-toughness alloy tool steel wire by reasonably designing chemical element components and matching with an optimized isothermal spheroidizing annealing process and a quenching and tempering heat treatment process. The Rockwell hardness of the high-strength and high-toughness alloy tool steel wire is 58-62 HRC, the torsion angle per unit length is higher than 10 degrees/mm, and the high-strength and high-toughness alloy tool steel wire has excellent torsion fracture resistance.
The high-strength and high-toughness alloy tool steel has remarkable advantages in the aspects of wear resistance and torsional fracture resistance, can be effectively applied to high-end products in the hardware tool industry, fills the blank of domestic markets in the field, and improves the technical level of the hardware tool industry.
Detailed Description
The high toughness alloy tool steel wire rod and the method for manufacturing the same according to the present invention will be further explained and illustrated with reference to specific examples, which, however, should not be construed to unduly limit the technical scope of the present invention.
Examples 1 to 8
The high-strength and high-toughness alloy tool steel wire rods of the embodiments 1 to 8 are prepared by the following steps:
(1) smelting, casting and rolling into wire rods according to chemical components shown in the table 1: the specification of the wire rod is phi 8-12 mm, slow cooling measures are taken when the rolled wire rod passes through a stelmor air cooling line, all fans are closed and heat preservation covers are covered when the rolled wire rod passes through the stelmor air cooling line, and the cooling rate of the wire rod is reduced.
(2) Off-line spheroidizing annealing: the wire rod is heated to 775-840 ℃ along with a furnace, the first heat preservation time is controlled to be 4-6 h, then the wire rod is cooled to the first final cooling temperature 710-750 ℃ at the first speed of 10-50 ℃/h, the second heat preservation time is 4-7 h, and then the wire rod is cooled to the second final cooling temperature which is less than or equal to 600 ℃ at the second speed of 10-50 ℃/h and taken out of the furnace.
(3) After the wire rod is manufactured through the processing procedure, quenching and tempering heat treatment is carried out: after the annealed wire rod is processed into a finished product through the working procedures of drawing, turning, milling and the like, quenching and tempering heat treatment is required; firstly heating to the austenitizing temperature of 820-960 ℃, preserving heat for 0.5-1 h, quenching and cooling to room temperature at the speed of 1-50 ℃/s; and (4) heating to 200-400 ℃ again for tempering, and keeping the temperature for 0.5-3 h. In addition, when the austenitizing temperature is 850-960 ℃, oil is adopted as a quenching cooling medium.
It should be noted that the chemical composition design and related processes of the high toughness alloy tool steel wire rods of examples 1-8 meet the design specification requirements of the present invention.
Table 1 shows the mass percentage of each chemical element of the high strength and toughness alloy tool steel wire rods of examples 1-8.
TABLE 1 (wt%, balance Fe and unavoidable impurities other than P, S)
Tables 2-1 and 2-2 list the specific process parameters for the high toughness alloy tool steel wire rods of examples 1-8 in the above process steps.
Table 2-1.
Table 2-2.
The high-toughness alloy tool steel wires of finished examples 1 to 8, which were obtained through the above process steps, were sampled respectively, and subjected to relevant performance tests, and the obtained performance test results are listed in table 3. The specific detection method is as follows:
and (3) hardness testing: according to the relevant regulations of GB/T230.1-2018 Rockwell hardness test for metal materials, a diamond cone pressure head is adopted for testing at room temperature, the size of a sample is phi 7mm, the thickness of the sample is 10mm, the upper surface and the lower surface of the sample are parallel, and a test point is positioned in the core part of the sample. .
Torsion angle per unit length test: the test is carried out according to the relevant regulations of GB/T10128-2007 Metal Material Room temperature torsion test method, the sample size is phi 7mm, the total length is 150mm, the gauge length is 50mm, the torsion speed is 30 DEG/min, and the test temperature is room temperature.
Table 3 lists the results of the performance tests associated with the high toughness alloy tool steel wire rods of examples 1-8.
Table 3.
As can be seen from Table 3, the high strength and toughness alloy tool steel wires according to examples 1 to 8 of the present invention have significant advantages in terms of wear resistance and torsional fracture resistance. The Rockwell hardness of the high-strength and high-toughness alloy tool steel wire rod of each embodiment is 58-62 HRC, the torsion angle per unit length is higher than 10 degrees/mm, and the preferred control is between 10 degrees/mm-15 degrees/mm, so that the high-strength and high-toughness alloy tool steel wire rod has good hardness and quite excellent torsion toughness, can be effectively applied to high-end products in the hardware tool industry, and improves the technical level of the hardware tool industry.
In addition, as can be seen from the microstructure observation of the high toughness alloy tool steel wire rods of examples 1 to 8, the microstructure of the high toughness alloy tool steel wire rods of examples 1 to 8 is tempered martensite plus spherical carbides in a dispersed manner, and the grain size of the spherical carbides may be 0.1 to 3 μm.
In conclusion, the invention can be seen that based on scientific and reasonable alloy composition design, wire rods with the specification of phi 8-12 mm can be obtained by smelting, casting and rolling the wire rods and controlling the cooling technology, the structure and plasticity of the wire rods are optimized by using an off-line isothermal spheroidizing annealing process, the subsequent drawing processing efficiency is improved, and finally the alloy tool steel wire rods with the Rockwell hardness of 58-62 HRC and the torsion angle of unit length higher than 10 degrees/mm can be obtained by matching with quenching and tempering heat treatment.
The high-strength and high-toughness alloy tool steel wire rod has remarkable advantages in the aspects of wear resistance and torsional fracture resistance, can be effectively applied to the field of hardware tools such as screw driver heads, inner hexagonal wrenches and sleeves, improves the technical level of the hardware tool industry, and has very important practical significance.
It should be noted that the combination of the features in the present application is not limited to the combination described in the claims of the present application or the combination described in the embodiments, and all the features described in the present application may be freely combined or combined in any manner unless contradicted by each other.
It should also be noted that the above-mentioned embodiments are only specific embodiments of the present invention. It is apparent that the present invention is not limited to the above embodiments and similar changes or modifications can be easily made by those skilled in the art from the disclosure of the present invention and shall fall within the scope of the present invention.
Claims (10)
1. The high-strength and high-toughness alloy tool steel wire is characterized by further comprising the following chemical elements in percentage by mass in addition to Fe:
C：0.60～0.90wt.％、Si：1.00～3.00wt.％、Mn：0.45～1.00wt.％、Cr：0.45～1.00wt.％、Mo：0.20～0.60wt.％；
wherein the microstructure of the high-strength and high-toughness alloy tool steel wire is tempered martensite and spherical carbide which is dispersed and distributed.
2. The high strength and toughness alloy tool steel wire rod of claim 1, wherein the mass percentage of each chemical element is as follows:
c: 0.60-0.90 wt.%, Si: 1.00-3.00 wt.%, Mn: 0.45-1.00 wt.%, Cr: 0.45-1.00 wt.%, Mo: 0.20-0.60 wt.%; the balance being Fe and other unavoidable impurities.
3. The high strength/toughness alloy tool steel wire rod as claimed in claim 1 or 2, further containing at least one of the following chemical elements:
0＜V≤0.30wt.％；
0＜Ni≤0.50wt.％；
0＜Nb≤0.05wt.％。
4. the high strength, high toughness alloy tool steel wire rod as claimed in claim 1 or 2, wherein among other unavoidable impurities: p ≦ 0.015 wt.%, and/or S ≦ 0.015 wt.%.
5. The high strength/toughness alloy tool steel wire rod as claimed in claim 1 or 2, wherein the spherical carbide has a grain size of 0.1 to 3 μm.
6. The high toughness alloy tool steel wire rod as claimed in claim 1 or 2, wherein the Rockwell hardness is 58 to 62HRC, and the torsion angle per unit length is higher than 10 °/mm.
7. The high strength/toughness alloy tool steel wire rod according to claim 6, wherein the torsion angle per unit length is 10 °/mm to 15 °/mm.
8. The method for producing a high toughness alloy tool steel wire rod as claimed in any one of claims 1 to 7, which comprises the steps of:
(1) smelting, casting and rolling into a wire rod;
(2) off-line spheroidizing annealing;
(3) after the wire rod is manufactured through the processing procedure, quenching and tempering heat treatment is carried out: heating to the austenitizing temperature of 820-960 ℃, preserving heat for 0.5-1 h, quenching and cooling to room temperature at the speed of 1-50 ℃/s; and (4) heating to 200-400 ℃ again for tempering, and keeping the temperature for 0.5-3 h.
9. The manufacturing method according to claim 8, wherein in the step (2), the wire rod is heated to 775-840 ℃ along with the furnace, is kept warm for 4-6 h, is cooled to 710-750 ℃ at the speed of 10-50 ℃/h, is kept warm for 4-7 h, is cooled to the temperature of less than or equal to 600 ℃ at the speed of 10-50 ℃/h, and is taken out of the furnace.
10. The method according to claim 8, wherein in the step (3), oil is used as the quenching cooling medium when the austenitizing temperature is 850 to 960 ℃.
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| CN202011060372.5A CN114318125A (en) | 2020-09-30 | 2020-09-30 | High-strength and high-toughness alloy tool steel wire and manufacturing method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115821169A (en) * | 2022-12-21 | 2023-03-21 | 湖南华菱涟源钢铁有限公司 | High-strength steel and preparation method and application thereof |
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| US5904787A (en) * | 1995-09-01 | 1999-05-18 | Sumitomo Electric Industries, Ltd. | Oil-tempered wire and method of manufacturing the same |
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| KR20110075318A (en) * | 2009-12-28 | 2011-07-06 | 주식회사 포스코 | High strength and toughness spring steel wire having excellent fatigue fracture resistance, spring for the same and method for manufacturing thereof |
| CN108160741A (en) * | 2017-12-28 | 2018-06-15 | 东莞科力线材技术有限公司 | Press part steel alloy wire rod preparation method, press part and its hardening and tempering process |
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| US5904787A (en) * | 1995-09-01 | 1999-05-18 | Sumitomo Electric Industries, Ltd. | Oil-tempered wire and method of manufacturing the same |
| CN1914347A (en) * | 2004-02-04 | 2007-02-14 | 住友电工钢铁电缆株式会社 | Steel wire for spring |
| KR20110075318A (en) * | 2009-12-28 | 2011-07-06 | 주식회사 포스코 | High strength and toughness spring steel wire having excellent fatigue fracture resistance, spring for the same and method for manufacturing thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115821169A (en) * | 2022-12-21 | 2023-03-21 | 湖南华菱涟源钢铁有限公司 | High-strength steel and preparation method and application thereof |
| CN115821169B (en) * | 2022-12-21 | 2024-04-05 | 湖南华菱涟源钢铁有限公司 | High-strength steel and preparation method and application thereof |
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Application publication date: 20220412 |