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Process method for precisely controlling glow ion nitriding of small module gear

A technology of glow ion infiltration and small modulus gears, which is applied in the direction of manufacturing tools, metal material coating processes, furnace types, etc., can solve the problem of poor consistency in the control of the depth of the penetration layer and the thickness of the nitriding layer on the teeth of the small modulus gears. , affecting the service life of gears and other problems, to achieve the effect of solving the small modulus gear nitriding layer out of tolerance, the process method is stable, and the service life is guaranteed.

Pending Publication Date: 2021-12-10
GUIZHOU QUNJIAN PRECISION MACHINERY
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Problems solved by technology

[0003] The present invention aims at the deficiencies of the glow ion nitriding technology for small modulus m=0.5~1 gears, and provides a process method for precisely controlling the glow ion nitriding of small modulus gears to solve the problem of existing small modulus gears. The gear nitriding layer structure and nitriding layer thickness control consistency is poor, it is easy to cause small modulus gear teeth to penetrate or the depth of the nitriding layer is insufficient, which seriously affects the service life of the gear

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  • Process method for precisely controlling glow ion nitriding of small module gear

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Embodiment

[0013] refer to figure 1 , this embodiment provides a process method for accurately controlling the glow ion nitriding of small modulus gears. The small modulus gears in this embodiment are made of 30CrMnSiA. , use glow sputtering and auxiliary heat source to heat up to the nitriding temperature, and then perform glow ion nitriding treatment, the specific process is as follows:

[0014] Clean the surface of the workpiece and place it on the cathode plate of the equipment, with a distance of 30-40mm between the workpieces, then use a vacuum pump to vacuum the furnace to 60-80Pa, and use an auxiliary heat source (second heat source) to heat the temperature in the furnace to 170 ~190°C, at this temperature, thin oxygen pre-oxidizes the surface of the workpiece to provide a good surface state for the uniformity of the glow ion nitriding structure. Then, turn off the auxiliary heat source (second heat source), start the cathode voltage, and use the glow sputtering effect to purify...

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Abstract

The invention provides a process method for precisely controlling glow ion nitriding of a small module gear. The method comprises the following steps of manufacturing the small module gear by using 30CrMnSiA, heating to a nitriding temperature by using glow sputtering and an auxiliary heat source after nitriding alloy structural steel 30CrMnSiA is subjected to pre-heat treatment and thermal refining, and then carrying out glow ion nitriding treatment. The problems that according to an existing small module gear nitriding layer structure, the nitriding layer thickness control consistency is poor, small module gear tooth permeation or insufficient nitriding layer depth is likely to be caused, and the service life of a gear is seriously affected are solved. The process method belongs to the technical field of metal material heat treatment.

Description

technical field [0001] The invention relates to a process method for accurately controlling the glow ion nitriding of small modulus gears, and belongs to the technical field of metal material heat treatment. Background technique [0002] Small modulus gears have the characteristics of high transmission precision and long service life. Usually, tooth surface nitriding is used to increase the hardness of the tooth surface and improve the service life of small modulus gears. The glow ion nitriding process has the characteristics of high efficiency, low consumption, and environmental protection. During the heating process of the existing glow ion nitriding technology, high-speed moving nitrogen ions hit the surface of the workpiece to generate internal energy, which increases the temperature of the workpiece. The temperature of the glow ion nitriding process can be nitriding at 420-540°C, so that nitrogen atoms infiltrate the workpiece during the heating process, and the infiltr...

Claims

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Application Information

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IPC IPC(8): C23C8/38C23C8/02C21D1/18C21D9/32C21D1/74
CPCC23C8/38C23C8/02C21D1/18C21D9/32C21D1/74
Inventor 陈汉兵周鹏亮杨华
Owner GUIZHOU QUNJIAN PRECISION MACHINERY
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