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High-temperature variable-carbon potential quick carburizing treatment process for gear parts

A carburizing treatment and variable carbon potential technology, applied in the field of heat treatment, can solve the problems of long process time and low efficiency, and achieve the effect of shortening process time and improving efficiency

Inactive Publication Date: 2013-02-06
CHANGZHOU METRO EVERBRIGHT HEAT TREATMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Long process time and low efficiency

Method used

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  • High-temperature variable-carbon potential quick carburizing treatment process for gear parts
  • High-temperature variable-carbon potential quick carburizing treatment process for gear parts
  • High-temperature variable-carbon potential quick carburizing treatment process for gear parts

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Experimental program
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Effect test

Embodiment 1

[0022] Such as figure 1 As shown, the first embodiment of the high-temperature variable carbon potential rapid carburizing process for gear parts of the present invention, the steps are as follows:

[0023] (1) One-time infiltration: first, carburize the parts in the carburizing furnace, maintain the furnace temperature in the range of 940-950°C, hold the time for 300 minutes, and keep the carbon potential in the mesh belt furnace within 1.30CP;

[0024] (2) Primary diffusion: Carburize the parts in the carburizing furnace, maintain the furnace temperature in the range of 940-950°C, keep the temperature for 240 minutes, and the carbon potential in the mesh belt furnace is 0.7% CP;

[0025] (3) Secondary strong infiltration: keep the furnace temperature in the range of 940-950°C, keep warm for 180min, and the carbon potential in the mesh belt furnace is 1.20%CP;

[0026] (4) Secondary diffusion: keep the furnace temperature in the range of 940-950°C, keep it warm for 120min, a...

Embodiment 2

[0034] Such as figure 2 As shown, the second embodiment of the high-temperature variable carbon potential rapid carburizing process for gear parts of the present invention, the steps are as follows:

[0035] The difference from Embodiment 1 is that:

[0036] (1) One-time infiltration: first, carburize the parts in the carburizing furnace, maintain the furnace temperature in the range of 940-950°C, hold the temperature for 300 minutes, and keep the carbon potential in the mesh belt furnace within 1.30% CP;

[0037] (2) Primary diffusion: Carburize the parts in the carburizing furnace, maintain the furnace temperature in the range of 940-950°C, keep the temperature for 240 minutes, and the carbon potential in the mesh belt furnace is 0.75% CP;

[0038] (3) Secondary strong infiltration: keep the furnace temperature in the range of 940-950°C, keep it warm for 300min, and the carbon potential in the mesh belt furnace is 1.25%CP;

[0039] (4) Secondary diffusion: maintain the fu...

Embodiment 3

[0043] Such as image 3 As shown, the third embodiment of the high-temperature variable carbon potential rapid carburizing process for gear parts of the present invention, the steps are as follows:

[0044] The difference from Embodiment 1 is that:

[0045] (1) One-time infiltration: first, carburize the parts in the carburizing furnace, maintain the furnace temperature in the range of 940-950°C, hold the temperature for 300 minutes, and keep the carbon potential in the mesh belt furnace within 1.35% CP;

[0046] (2) Primary diffusion: Carburize the parts in the carburizing furnace, maintain the furnace temperature in the range of 940-950°C, keep the temperature for 240 minutes, and the carbon potential in the mesh belt furnace is 0.8% CP;

[0047] (3) Secondary strong infiltration: keep the furnace temperature in the range of 940-950°C, keep warm for 360min, and the carbon potential in the mesh belt furnace is 1.30%CP;

[0048] (4) Secondary diffusion: keep the furnace temp...

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Abstract

The invention relates to a high-temperature variable-carbon potential quick carburizing treatment process for gear parts. The high-temperature variable-carbon potential quick carburizing treatment process comprises the steps as follows: strongly carburizing for the first time; diffusing for the first time; strongly carburizing for the second time; diffusing for the second time; cooling; quenching; cleaning; tempering; and taking out the parts, discharging and air-cooling. According to the high-temperature variable-carbon potential quick carburizing treatment process, a high-temperature variable-carbon potential method is adopted, so that the process time can be shortened by 20-30% under the condition that materials, part sizes and carburized layer depths are the same, that is, the efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of heat treatment, in particular to a high-temperature variable carbon potential rapid carburizing treatment process for gear parts. Background technique [0002] Carburizing is a chemical heat treatment process in which the steel is heated and kept warm in a carburizing medium to increase the carbon content and a certain carbon concentration gradient on the surface of the steel so that carbon atoms can penetrate into the surface. Quenching and tempering after carburizing can improve the surface hardness and wear resistance of the parts, while the core has good toughness. Carbonitriding is a heat treatment process in which nitrogen and carbon are infiltrated into the surface of the workpiece, and nitriding is the main method. The infiltration layer has lower hardness and less brittleness. The main advantage is that the deformation of the workpiece is small, and it is not limited by the steel type. However...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C8/22
Inventor 邱鹏
Owner CHANGZHOU METRO EVERBRIGHT HEAT TREATMENT
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