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High-performance alloy steel material and preparation method thereof

An alloy steel, high-performance technology, applied in the field of alloy steel materials, can solve the problems of high content of carbon and alloy elements, unfavorable application of alloy steel materials, lack of processability, etc., to achieve good processability, improve hardenability and resistance Tempering and softening ability, low cost effect

Inactive Publication Date: 2018-05-15
宁波诚泰汽车部件有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In the Chinese patent document with the application number 201611105516.8, a high-temperature and wear-resistant alloy steel material and its preparation method are introduced. It adopts electric furnace melting, uses 1Cr13 steel scrap and 625 nickel-based alloy scrap as the main raw materials, and adds ferroboron, Ferro-titanium, high-carbon ferrochrome, aluminum, nickel-coated WC powder, rare earth ferrosilicon alloy, silicon-calcium-barium-aluminum alloy and other materials, this alloy steel material has the characteristics of high temperature resistance and wear resistance, but it is easy to cause cold cracks , and does not have good processability
In the Chinese patent literature with the application number 201710379824.8, a wear-resistant low-carbon alloy steel material for stirring blades and its preparation method are introduced. It uses alloying elements such as silicon, chromium, molybdenum, and vanadium to make the alloy steel have high hardness. , higher wear resistance, and better toughness, but the selected alloy steel material has a high content of carbon and alloy elements, showing a clear hardening tendency, which is not good for the application of alloy steel materials

Method used

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preparation example Construction

[0029] Correspondingly, the present invention also provides a method for preparing the high-performance alloy steel material described in the above technical solution, comprising the following steps: step a) putting scrap steel into an intermediate frequency furnace for melting, and then sequentially adding Mo, Cr, Mn, Ti, Alloying V, Ni, La, and Dy; step b) raising the temperature of the intermediate frequency furnace to 1200-1400°C, and casting to obtain a casting; step c) raising the temperature of the casting to 800-900°C for quenching treatment, and keeping it warm for 0.5-2 After 1 hour, take it out of the furnace and air cool to room temperature; step d) raise the temperature of the casting to 400-700°C for tempering treatment, keep it warm for 1-3 hours, and obtain a high-performance alloy steel material after cooling.

[0030] As a preferred solution, the heating temperature of the intermediate frequency furnace is 1300-1400°C. In step c, the heating temperature is 85...

Embodiment 1

[0036] The preparation method of high-performance alloy steel material of the present invention is as follows:

[0037] (1) Put the steel scrap into the intermediate frequency furnace and fully melt it, and add the alloy components in the intermediate frequency furnace after the scrap steel is melted: Mo, Cr, Mn, Ti, V, Ni, La, Dy for alloying;

[0038] (2) The temperature in the furnace is raised to 1200° C., and cast into a casting mold box to obtain a casting;

[0039] (3) heating up the casting obtained in step 2 to 800° C. for quenching treatment, keeping the temperature for 2 hours, and air-cooling to normal temperature after being released from the furnace;

[0040] (4) Heating the casting obtained in step 3 to 400° C. for tempering treatment, keeping the temperature for 3 hours, and then taking it out of the furnace and air-cooling to normal temperature.

[0041] The weight percentage content of each chemical composition is: C: 0.2%, Si: 0.4%, N: 0.03%, Mn: 0.7%, Cr: ...

Embodiment 2

[0043] The preparation method of high-performance alloy steel material of the present invention is as follows:

[0044] (1) Put the steel scrap into the intermediate frequency furnace and fully melt it, and add the alloy components in the intermediate frequency furnace after the scrap steel is melted: Mo, Cr, Mn, Ti, V, Ni, La, Dy for alloying;

[0045] (2) The temperature in the furnace is raised to 1300° C., and cast into a casting mold box to obtain a casting;

[0046] (3) heating up the casting obtained in step 2 to 850° C. for quenching treatment, keeping the temperature for 1 hour, and air-cooling to normal temperature after being released from the furnace;

[0047] (4) Heat the casting obtained in step 3 to 600° C. for tempering treatment, keep it warm for 1 hour, and then take it out of the furnace and air-cool it to room temperature.

[0048] The weight percentage content of each chemical composition is: C: 0.15%, Si: 0.3%, N: 0.03%, Mn: 0.5%, Cr: 2%, V: 0.3%, Ti: 0....

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Abstract

The invention provides a high-performance alloy steel material and a preparation method thereof. The high-performance alloy steel material is prepared from C, Si, N, Mn, Cr, V, Ti, Mo, Ni, La, Dy, P,S and Fe. The high-performance alloy steel material provided by the invention is made of waste steel, so that the high-performance alloy steel material is environmentally friendly, low in cost, excellent in mechanical property, high in machinability and suitable for industrial production. On the basis of the waste steel, a proper number of alloy elements Ti and V are added; the alloy elements andelements C and N form carbonitride particle refined austenite grains, so that the intensity and the toughness of the material are enhanced; by the adding of the element Mo cooperating with the elements such as Ti and V, the mechanical property of the material is improved; the element Mo is matched with the element Ni to improve the hardenability the temper softening resistance of alloy steel; by the adding of a rare earth element La, active inclusion nucleation particles can be produced, thereby refining the grains and purifying the grain boundary; under the action of the rare earth elements Dy and La, the intensity, the toughness and the wear resistance of the material are further improved.

Description

technical field [0001] The invention relates to an alloy steel material, in particular to a high-performance alloy steel material and a preparation method thereof. Background technique [0002] Alloy steel is an iron-carbon alloy formed by adding an appropriate amount of one or more alloying elements to ordinary carbon steel. It is widely used in machine parts, engineering structural parts, tools and mold materials. With the rapid development of modern science and technology, higher and higher requirements are put forward for the performance of alloy steel. [0003] In the Chinese patent document with the application number 201611105516.8, a high-temperature and wear-resistant alloy steel material and its preparation method are introduced. It is smelted in an electric furnace, with 1Cr13 steel scrap and 625 nickel-based alloy scrap as the main raw materials, and ferroboron, Ferro-titanium, high-carbon ferrochromium, aluminum, nickel-coated WC powder, rare earth ferrosilicon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/44C22C38/46C22C38/50C22C33/04C21D1/18
CPCC22C38/02C21D1/18C22C33/04C22C38/001C22C38/005C22C38/04C22C38/44C22C38/46C22C38/50
Inventor 姚赞诚
Owner 宁波诚泰汽车部件有限公司
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