Strengthening Method of Tooth Surface of Drive Wheel Ring Gear of Tracked Vehicle

A driving wheel and tooth surface technology, which is applied in the field of surface strengthening of parts, can solve the problems of insufficient wear resistance of the tooth surface of the driving wheel ring gear, and achieve the effect of solving the insufficient wear resistance.

Active Publication Date: 2017-04-12
内蒙古一机集团瑞特精密工模具有限公司
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  • Application Information

AI Technical Summary

Problems solved by technology

Effectively solve the problem of insufficient wear resistance of the tooth surface of the driving wheel ring gear

Method used

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  • Strengthening Method of Tooth Surface of Drive Wheel Ring Gear of Tracked Vehicle
  • Strengthening Method of Tooth Surface of Drive Wheel Ring Gear of Tracked Vehicle
  • Strengthening Method of Tooth Surface of Drive Wheel Ring Gear of Tracked Vehicle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0027] The tooth surface strengthening process of the driving wheel ring gear is implemented in the following six steps:

[0028] (1) Roughly process the ring gear in the quenched and tempered state, process and remove the 3mm base material of the tooth surface on a CNC milling machine, and inspect the processed tooth surface to ensure that there are no defects such as cracks and sand holes;

[0029] (2) Prepare T15 high speed steel rare earth modified powder and 507Mo: T15 high speed steel rare earth modified powder = 3:7 mixed powder. Before cladding, use a high-speed vibrating ball mill to perform high-speed ball milling on the alloy powder for cladding for 20 minutes to mix the powder particles evenly, and dry them in a vacuum drying oven at 80°C for 12 hours.

[0030] (3) According to the process parameters in Table 1, firstly, the tooth surface is clad with 507Mo: T15 high-speed steel rare earth modified powder = 3:7 mixed powder cladding, and cladding is carried out fro...

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Abstract

The invention relates to a method for reinforcing the tooth surface of a driving wheel gear ring of a crawler vehicle. The problem that the wear resistance of the tooth surface of the driving wheel gear ring is insufficient is effectively solved. The 42CrMo driving wheel gear ring is forged by a laser cladding manufacture technology. A reinforcing layer which is 3 mm in depth is formed in the meshing part of the tooth surface, the reinforcing layer is of a double-layer structure consisting of a bottoming layer in contact with the base body and a tooth surface reinforcing layer, the thickness of the reinforcing layer is 2.2-2.5 mm, the tooth surface reinforcing layer is clad by alloy powder which is T15 high-speed steel and rare earth modified powder formed by that 0.2-0.3% of rare earth elements is added to T15 high-speed steel alloy powder, the thickness of the bottoming layer is 0.5-0.8mm, the cladding alloy powder is a mixture of 507Mo and the T15 high-speed steel and rare earth modified powder, and the mass mixing ratio of the 507Mo to the T15 high-speed steel and rare earth modified powder is 3:7. The trial running assessment of the crawler vehicle with the driving wheel gear ring reinforced by laser cladding for 6000 kilometers shows that the service life is 1.5-2 times of that of the driving wheel gear ring produced by the traditional medium frequency induction quenching technology.

Description

[0001] Technical field: [0002] The invention relates to a method for strengthening the surface of a part, in particular to a method for strengthening the tooth surface of a drive wheel ring gear of a crawler vehicle. [0003] Background technique: [0004] The gear ring gear of the tracked tank armored vehicle is made of 42CrMo, which is forged and installed on the rear transmission shaft of the tank. It drives the vehicle through stable meshing with the track end coupling. Due to the bad driving conditions, the tooth surface of the ring gear is subject to sliding and impact. And other forms of alternating wear, the stress is complex. At present, the gear ring of the driving wheel mainly adopts the heat treatment process of medium-frequency induction hardening on the tooth surface. After heat treatment, the quenching layer depth distribution at different positions on the tooth surface is uneven, usually around 3-6mm, and the hardness is 51-54HRC. After the tank was tested by...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C24/10
Inventor 杨学文谷志飞王金栋郭峰洪振军马涛邢艳明张宏志
Owner 内蒙古一机集团瑞特精密工模具有限公司
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