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T7 steel and strengthening method thereof

A technology of carbon dioxide and temperature range, applied in the field of strengthening steel, can solve the problems of long nitriding time and increased production cost

Inactive Publication Date: 2018-05-25
衢州量智科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] It can be seen that the nitriding time on the surface of alloy steel is relatively long, at least 40 hours. Since argon, nitrogen or hydrogen gas needs to be injected during this process, the operation time greatly increases the production cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The strengthening method of T7 steel: It includes the steps of heat-treating the steel billet of T7 material in an atmosphere containing nitrogen and then lowering the temperature; the heat-treating is carried out under negative pressure atmosphere, where the pressure is (-0.02) Mpa; The heat treatment includes a first temperature section, a second temperature section, a third temperature section and a fourth temperature section; wherein the temperature of the first temperature section is 780°C, the temperature of the second temperature section is 620°C, and the temperature of the third temperature section is The temperature in the fourth temperature zone is 830°C, and the temperature in the fourth temperature zone is 780°C; among them, the treatment time in the first temperature zone is 2.5h, the treatment time in the second temperature zone is 3h, and the treatment time in the third temperature zone is 4h. The processing time of the segment is 5h;

[0031] Among them, in...

Embodiment 2

[0034] The strengthening method of T7 steel includes the steps of heat-treating the billet made of T7 material in an atmosphere containing nitrogen and then lowering the temperature; the heat-treatment is carried out under negative pressure atmosphere, wherein the pressure is (-0.04)Mpa; The heat treatment includes a first temperature section, a second temperature section, a third temperature section and a fourth temperature section; wherein the temperature of the first temperature section is 820°C, the temperature of the second temperature section is 650°C, and the temperature of the third temperature section The temperature in the fourth temperature zone is 800°C; the treatment time in the first temperature zone is 1h, the treatment time in the second temperature zone is 2h, the treatment time in the third temperature zone is 2h, the first temperature zone The processing time is 3h;

[0035] Among them, in terms of volume content, the content of nitrogen in the atmosphere at th...

Embodiment 3

[0038] The strengthening method of T7 steel: including the steps of heat-treating the billet of T7 material in an atmosphere containing nitrogen and then lowering the temperature; the heat-treatment is carried out under negative pressure atmosphere, wherein the pressure is (-0.03)Mpa; The heat treatment includes a first temperature section, a second temperature section, a third temperature section and a fourth temperature section; wherein the temperature of the first temperature section is 800°C, the temperature of the second temperature section is 635°C, and the temperature of the third temperature section is The temperature in the fourth temperature zone is 820°C, and the temperature in the fourth temperature zone is 790°C; among them, the treatment time in the first temperature zone is 1.8h, the treatment time in the second temperature zone is 2.5h, and the treatment time in the third temperature zone is 3h. The processing time of the temperature section is 4h;

[0039] Among ...

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PUM

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Abstract

The invention relates to the field of steel strengthening, and discloses T7 steel and a strengthening method thereof. The method comprises the steps that a steel billet made from T7 is subjected to thermal treatment in the nitrogen-including atmosphere, and then cooling is carried out, wherein thermal treatment comprises a first temperature section, a second temperature section, a third temperature section and a fourth temperature section. According to the strengthening method of the T7 steel, large strengthened layer thickness can be obtained within a short work time, and the rigidity of thestrengthened T7 steel can be remarkably increased. Furthermore, the rigidity of a base body except for a strengthened layer is also increased, and the service life of a T7 steel product can be furtherprolonged.

Description

Technical field [0001] The present invention relates to strengthened steel, in particular to a T7 steel and a strengthening method thereof. Background technique [0002] Coated tool is a tool obtained by coating a layer of refractory metal or non-metal compound with good wear resistance on the surface of cemented carbide or high-speed steel (HSS) substrate with good strength and toughness. The coating acts as a chemical and thermal barrier to reduce the diffusion and chemical reaction between the tool and the workpiece, thereby reducing the wear of the crescent socket. Coated tools have the characteristics of high surface hardness, good wear resistance, stable chemical properties, heat resistance and oxidation resistance, low friction factor and low thermal conductivity. During cutting, the tool life can be increased by more than 3 to 5 times compared with uncoated tools. The cutting speed is 20% to 70%, the machining accuracy is improved by 0.5 to 1 level, and the tool consumpt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C8/26C22C38/02C22C38/04C22C38/22C22C38/12
CPCC23C8/26C22C38/02C22C38/04C22C38/12C22C38/22
Inventor 江雨仙
Owner 衢州量智科技有限公司