A composite heat treatment process for wear-resistant gears

A composite heat treatment and process technology, applied in heat treatment furnaces, heat treatment equipment, metal material coating processes, etc., can solve the problems of complex heat treatment process and insignificant energy saving effect, and achieve the effect of improving hardness, saving energy and prolonging service life.

Active Publication Date: 2018-05-15
东华链条兴化有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Due to the advantages of high strength and high wear resistance, alloy steel castings gradually replace ordinary carbon steel parts and are widely used in the field of casting. In practical applications, it is necessary to reasonably select the strength, hardness and toughness of low alloy steel. The existing heat treatment The process is complicated and the energy-saving effect is not obvious. Although its strength and hardness can be improved to a certain extent, the process needs to be improved for certain high-demand and high-standard workpieces.

Method used

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  • A composite heat treatment process for wear-resistant gears

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Effect test

Embodiment 1

[0017] The invention provides a technical solution: a composite heat treatment process for wear-resistant gears, comprising the following steps:

[0018] A. Cleaning and drying: send the workpiece to the washing machine for drying, the drying time is 45min, and then send the dried workpiece to the heating chamber;

[0019] B. Carburizing: Heat up the heating chamber. During the heating process, the amount of propane is 0.15L / h. When the temperature of the heating chamber rises to 880°C, the amount of propane is 0.25L / h, and the standard air is 20L / h. Maintain a constant temperature for 10 minutes; then heat the radiant tube in the heating chamber with full power, the temperature rises to 925°C, the amount of propane introduced is 0.15L / h, the standard air is 20L / h, and the carbon potential is 1.2; then diffuse , the diffusion temperature is 925°C, the carbon potential drop is 0.85; then the temperature is lowered to 820°C, the holding time is 20min, and the carbon potential re...

Embodiment 2

[0028] The invention provides a technical solution: a composite heat treatment process for wear-resistant gears, comprising the following steps:

[0029] A. Cleaning and drying: send the workpiece to the washing machine for drying, the drying time is 45min, and then send the dried workpiece to the heating chamber;

[0030] B. Carburizing: Raise the temperature of the heating chamber. During the heating process, the amount of propane introduced is 0.15L / h. Maintain a constant temperature for 10 minutes; then heat the radiant tube in the heating chamber with full power, the temperature rises to 925°C, the amount of propane introduced is 0.15L / h, the standard air is 20L / h, and the carbon potential is 1.3; then diffuse , the diffusion temperature is 925°C, the carbon potential drop is 0.85; then the temperature is lowered to 830°C, the holding time is 25min, and the carbon potential remains at 0.85;

[0031] C. Protective gas air cooling: After the program is finished, the PPC se...

Embodiment 3

[0039] The invention provides a technical solution: a composite heat treatment process for wear-resistant gears, comprising the following steps:

[0040] A. Cleaning and drying: send the workpiece to the washing machine for drying, the drying time is 45min, and then send the dried workpiece to the heating chamber;

[0041] B. Carburizing: Raise the temperature of the heating chamber. During the heating process, the amount of propane is 0.15L / h. Maintain a constant temperature for 10 minutes; then heat the radiant tube in the heating chamber with full power, the temperature rises to 915°C, the amount of propane introduced is 0.15L / h, the standard air is 20L / h, and the carbon potential is 1.3; then diffuse , the diffusion temperature is 915°C, the carbon potential drop is 0.90; then the temperature is lowered to 820°C, the holding time is 25min, and the carbon potential remains at 0.90;

[0042] C. Protective gas air cooling: After the program is finished, the PPC sends the wor...

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PUM

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Abstract

The invention discloses a compound heat treatment technology for wear-resistant gears. The compound heat treatment technology comprises the following steps: A, washing and drying; B, carburizing; C, carrying out shielding gas air-cooling; D, washing and drying; E, heating and exhausting; F, carrying out intensive carburizing; G, diffusing; H, discharging out of a furnace and air-cooling; and I, carrying out rust prevention. The technology is simple, is environment-friendly and pollution-free in the whole process, can effectively improve the hardness, strength and wear resistance of alloy castings, reduces production cost, saves energy, reduces environmental pollution, is high in tempering temperatures, enables the gears to be resistant to high temperatures, deformation and friction and prolongs the service life.

Description

technical field [0001] The invention relates to the technical field of heat treatment of alloy castings, in particular to a composite heat treatment process for wear-resistant gears. Background technique [0002] Due to the advantages of high strength and high wear resistance, alloy steel castings gradually replace ordinary carbon steel parts and are widely used in the field of casting. In practical applications, it is necessary to reasonably select the strength, hardness and toughness of low alloy steel. The existing heat treatment The process is complicated and the energy-saving effect is not obvious. Although its strength and hardness can be improved to a certain extent, the process needs to be improved for certain high-demand and high-standard workpieces. Contents of the invention [0003] The purpose of the present invention is to provide a composite heat treatment process for wear-resistant gears to solve the problems raised in the above-mentioned background technolo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C8/34C21D1/18C21D9/32C21D1/613C23F17/00
CPCC21D1/18C21D1/613C21D9/32C23C8/34C23F17/00
Inventor 徐孙传卢俊蒋亚龙薛文奎王广忠宗勇彬
Owner 东华链条兴化有限公司
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