Carburizing method of 9310 steel spiral bevel gear

A spiral bevel gear and carburizing technology, applied in the field of heat treatment of low-carbon high-alloy steel, can solve the problems of difficult to achieve precise control of carburized layer depth, large fluctuations in carburized layer depth, etc., to achieve control of carburized layer depth and quenching deformation , Reasonable effect of technology

Active Publication Date: 2020-01-17
ZHONGNAN TRANSMISSION MACHINERY FACTORY CHANGSHAAVIATION IND
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a commonly used carburized gear steel, 9310 steel has a very fast carburizing speed. When the carburized layer depth is ≥1.0mm, the carburized layer depth fluctuates greatly, and it is difficult to achieve precise control of the carburized layer depth with existing technologies.

Method used

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  • Carburizing method of 9310 steel spiral bevel gear
  • Carburizing method of 9310 steel spiral bevel gear

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Embodiment 1

[0027] For a spiral bevel gear part of an aviation product, the carburizing depth of the tooth is required to be 1.25~1.5mm (measured to HV513), the hardness of the carburizing surface of the tooth is 81~83HRA, and the depth of the tooth surface HRC60 is ≥0.56mm.

[0028] Such as figure 1 As shown, the carburizing method of a kind of 9310 steel spiral bevel gear of the present embodiment specifically comprises the following steps:

[0029] (1) The surface of the spiral bevel gear parts is protected by copper plating except for the teeth, and the thickness of the copper layer is 0.03-0.05mm (0.035mm in this embodiment).

[0030] (2) The spiral bevel gear parts are placed in the sand blowing machine to clean the carburized surface of the teeth. The corundum sand grain size is (60-100) mesh, and the wind pressure is ≤0.15MPa to ensure that the sand blowing surface is gray after sand blowing.

[0031] (3) The spiral bevel gear parts are placed in the vacuum carburizing furnace, a...

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Abstract

The invention discloses a carburizing method of a 9310 steel spiral bevel gear. The method includes the following steps of performing pretreatment on a spiral bevel gear part; putting the spiral bevelgear part in a vacuum furnace with the vacuum degree smaller than or equal to 15 mbar for pulse type carburizing treatment at the temperature of 927 DEG C, wherein the time of each time of introducing of the carburizing atmosphere is 40-60 seconds, the time of each time of introducing of the diffusing atmosphere is 100-6000 seconds, and the flow of the carburizing atmosphere and the diffusing atmosphere is 1500-2000 Nl/h; performing primary tempering treatment on the spiral bevel gear part; performing quenching treatment on the spiral bevel gear part; and performing cold treatment and secondary tempering treatment on the spiral bevel gear part. The carburizing depth can be precisely controlled.

Description

technical field [0001] The invention relates to the field of heat treatment of low-carbon high-alloy steel, in particular to a carburizing method for a 9310 steel spiral bevel gear. Background technique [0002] Aviation gears are key components of aero-engines, and reliable and accurate gear transmission is a necessary condition to ensure engine life. In order to improve the fatigue strength and wear resistance of the gear surface and increase the life of the gear, the surface of the gear and the bearing raceway are often carburized, and after quenching, parts with high surface hardness and high toughness are obtained. As a commonly used carburized gear steel, 9310 steel has a very fast carburizing speed. When the carburized layer depth is ≥1.0mm, the carburized layer depth fluctuates greatly, and it is difficult to achieve precise control of the carburized layer depth in the existing technology. Aviation products involve a spiral bevel gear part, requiring the carburizing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C8/22C21D1/18C21D9/32C21D6/04
CPCC23C8/22C21D1/18C21D9/32C21D6/04Y02P10/20
Inventor 王广超张志华吴平刘龙凯
Owner ZHONGNAN TRANSMISSION MACHINERY FACTORY CHANGSHAAVIATION IND
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