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Simultaneous clad coating and additive strengthening method of wear surface of shifting fork

A wear surface and fusion coating technology, which is applied in the direction of coating, fusion spraying, metal material coating process, etc., can solve the problems that the quality is difficult to meet the requirements, the surface hardness of the workpiece is low, and the performance is unstable, so as to overcome deformation and Process inconsistency, prevent coating peeling, improve yield and production efficiency

Inactive Publication Date: 2019-03-15
翟长生
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after high frequency quenching, the surface hardness of the workpiece is low and the distribution is large, the performance is unstable, and the yield is low, so the quality is difficult to meet the requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1: The iron-based coating of the shift fork is simultaneously melt-coated and strengthened

[0022] Its specific process steps:

[0023] 1) Perform pre-processing on the wear-resistant surfaces of the two fork legs of the shift fork, and the size after pre-processing is 0.2mm smaller than the size of one side of the finish machining.

[0024] 2) The iron-based alloy powder is selected, and the flame spraying process is used for additive spraying. Powder particle size distribution: 150~320 mesh. The iron-based alloy powder composition is: C: 1.0~4.0wt.%, Cr: 20~50wt.%, Si: 2.0~5.0wt.%, B: 2.0~4.0wt.%, Ni: 10~20wt.%, Balance: Fe. Deposited coating thickness: 0.6 mm.

[0025] 3) Simultaneous preheating and induction coating treatment is performed on the two shift fork legs that have formed additive coatings, so as to realize the metallurgical bonding between the coating and the base of the two shift fork legs, so that the coating is dense and reaches the specif...

Embodiment 2

[0028] Example 2: Additive strengthening of nickel-based coating for shift fork

[0029] Its specific process steps:

[0030] 1) Perform pre-processing on the wear-resistant surfaces of the two fork legs of the shift fork, and the size after pre-processing is 0.2mm smaller than the size of one side of the finish machining.

[0031] 2) Carry out sandblasting, cleaning and roughening treatment on the wear surface of the shift fork to be strengthened, so that the surface of the part to be coated is degreased, derusted, and roughened to meet the requirements of sa3.2; in the sandblasting treatment, the sand used is brown corundum or Corundum, its particle size is 16~18 mesh.

[0032] 3) Nickel-based alloy powder is selected, and the flame spraying process is used for additive spraying. Powder particle size distribution: 150~320 mesh. The composition of nickel-based alloy powder is: C:0.5~1.1wt.%, Si:3.5~5.5wt.%, B:3.0~4.5wt.%, Cr:14~20wt.%, Fe:≤17.wt.% , Balance: Ni. Deposite...

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Abstract

The invention discloses a simultaneous clad coating and additive strengthening method of a wear surface of a shifting fork. The simultaneous clad coating and additive strengthening method comprises the following steps of pre-processing the wear surface of the shifting fork, performing rough cleaning treatment on the wear surface of the shifting fork, coating additives, preheating induction cladding, performing anti-deformation treatment, performing subsequent finishing and performing quality inspection warehousing. According to the simultaneous clad coating and additive strengthening method, the induction cladding preheating process is used for performing simultaneous clad coating and additive strengthening treatment on the wear surface of the shifting fork, so that deformation and processinconsistency which are generated by sequential clad coating of two shifting fork pins are effectively overcome, metallurgical bonding between the wear surface of the shifting fork and the additive coating is realized, the interface binding force reaches 300 to 450 Ma, the disbonding is effectively prevented, the service life of the shifting fork is obviously prolonged, the product quality is guaranteed, and the rate of finished products and the production efficiency are increased. The simultaneous clad coating and additive strengthening method can be widely applied to wear strengthening of shifting forks of automobiles, farm vehicles, engineering vehicles and the like and has the effects of good economic benefits and energy conservation.

Description

technical field [0001] The invention relates to a material-adding strengthening method, in particular to a method for simultaneously melt-coating a material-adding strengthening method on the wearing surface of a shift fork, and belongs to the technical field of surface strengthening of a shift fork. Background technique [0002] As a part of the gearbox of automobiles, agricultural vehicles and other vehicles, the shift fork is connected to the shift handle and is located at the lower end of the handle. The middle shift wheel is moved to change the input / output speed ratio. The shift fork is often in a working state of friction with the shift lever. , its wear surface is worn by friction and needs to be replaced after wear. In order to improve its wear resistance and prolong its service life, it needs to be strengthened. At present, the high-frequency quenching process is mainly used. For example, the authorized announcement number: CN204824986 U discloses "a high-frequenc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/129C23C4/06C23C4/18C22C38/54C22C38/56C22C38/02C22C30/00C21D6/00C22F1/00
CPCC21D6/00C22C30/00C22C38/02C22C38/54C22C38/56C22F1/00C23C4/06C23C4/129C23C4/18
Inventor 翟长生解芳翟群智陈健杨喜华蔡晓宇张欣贺晨阳
Owner 翟长生