Hard alloy filler repairing technology

A cemented carbide and process technology, applied in metal material coating process, melt spraying, coating and other directions, can solve the problems of waste and difficult repair of cemented carbide products, and achieve the effect of solving serious waste and reducing cost loss.

Active Publication Date: 2014-04-02
ZHEJIANG HENGCHENG CEMENTED CARBIDE
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AI Technical Summary

Problems solved by technology

[0003] The invention provides a cemented carbide filler repair process, which aims to solve the

Method used

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Examples

Experimental program
Comparison scheme
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Example Embodiment

[0020] A cemented carbide filler repair process includes the following process steps in sequence:

[0021] A. Use a grinding wheel to polish the defective part of the product and see it;

[0022] B. Use corrosive liquid to corrode the polished part of the product;

[0023] C. Carry out pre-heat treatment on the product processed in step B in an environment of 200°C ~ 250°C; it is beneficial to the combination with the following spray;

[0024] D. The cobalt-coated tungsten carbide powder with a cobalt content of 20%-30% is sent axially or laterally into the flame stream, and the defective parts of the preheated product are sprayed repeatedly until the required thickness is reached. The speed is within 1500m / s~2000m / s, and the temperature is within 2900℃~3100℃; due to the high flame flow velocity, the sprayed particles can be accelerated to as high as 300~650m / when they are heated to a molten or semi-melted state. s speed, so as to obtain a high-quality coating with high bonding stre...

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Abstract

The invention relates to a hard alloy filler repairing technology and aims at solving the problem of serious waste caused by difficult repair of hard alloy products in the prior art. The hard alloy filler repairing technology mainly comprises the following steps: polishing of a defective part, corrosion of the defective part, product preheating, defective part filling with supersonic-speed high-temperature flame coating machine, pressing of a repaired part, aging treatment on a product and secondary sintering. According to the processing technology provided by the invention, by adopting a technology of supplementing material to the defective part of the hard alloy product, the problem of serious waste of hard alloy can be effectively solved, and the cost loss can be saved by 150 yuan for repairing one kilogram of product, thus tens of thousands of cost loss can be reduced every year.

Description

technical field [0001] The invention relates to a cemented carbide filler repairing process. Background technique [0002] When the existing cemented carbide has defects, it is mainly dealt with by the following two methods. When there are few defects, the back-burning process is carried out. The back-burning process is to transfer the excess to the less side through deformation, and the two sides must be on the same axis. Direction, when there are many defects, it is directly scrapped; the back-burning process can only process products with a margin difference of 0.5 or thin-walled products; if some products lack margins inside and outside, they can only be scrapped; Scrap treatment, a cemented carbide company has 1 to 2 tons of surplus defective waste products every year, resulting in depreciation and flow of waste products in the market, resulting in a great waste of resources. Contents of the invention [0003] The invention provides a cemented carbide filler repair p...

Claims

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Application Information

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IPC IPC(8): C23C4/10C23C4/02C23C4/18B23P6/00C23C4/06C23C4/129
Inventor 郭伟波杨雪金益民吴晓娜
Owner ZHEJIANG HENGCHENG CEMENTED CARBIDE
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