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Cemented carbide and steel vacuum diffusion welding process

A cemented carbide and vacuum diffusion technology, which is applied in metal material coating technology, welding equipment, metal processing equipment, etc., can solve the problems of difficult melting of base metal, easy oxidation of cemented carbide, and micro-cracks in weld welding

Active Publication Date: 2019-03-26
自贡中兴耐磨新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The melting point, thermal conductivity, linear expansion coefficient, and mechanical properties of cemented carbide and steel are very different. During welding, the base material with a low melting point melts first, and the base material with a high melting point is still heated, resulting in high and low melting points. It is difficult to melt the base metal, and a large thermal stress will be generated at the joint during the welding process, which increases the tendency of cracks. In addition, the cemented carbide is easy to oxidize at high temperature and forms an oxide film with a high melting point. These oxide films can not only form weld clamps The slag will directly affect the fusion of the weld, and will also cause welding microcracks in the weld

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  • Cemented carbide and steel vacuum diffusion welding process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A vacuum diffusion welding process for cemented carbide and steel.

[0023] Pre-welding treatment: rough grinding the spreading test surface and brazing surface of the cemented carbide and steel on a diamond grinder, coating the cast iron block with diamond paste, and finally placing the spreading surface and brazing surface on the cast iron Grind until the surface is bright, rough-grind the 45 steel on the grinder, and then polish the spread test surface and the brazing surface with metallographic sandpaper. The solder CuMnNi is cut into slices, and the size is slightly larger than the brazing surface. Ensure that the amount of solder is enough to fill the brazing gap, polish the solder and iron sheet with metallographic sandpaper to remove the oxide layer;

[0024] During brazing, soak all the polished materials in acetone for 5-10 minutes, scrub them, and then take them out and blow dry to prevent the sample from being contaminated again. Vacuum diffusion brazing is requi...

Embodiment 2

[0033] Pre-welding treatment: Coarse the spreading test surface and brazing surface of the cemented carbide and steel on a diamond grinder, then apply diamond paste on the cast iron block, and finally place the spreading surface and brazing surface on the cast iron Grind until the surface is bright; rough-grind the 45 steel on a grinder, and then polish the spread test surface and brazing surface with metallographic sandpaper; cut the solder iron sheets into slices, the size should be slightly larger than the brazing surface To ensure that the amount of solder is sufficient to fill the brazing gap, polish the solder and iron sheet with metallographic sandpaper to remove the oxide layer;

[0034] During brazing, soak all the polished materials in acetone for 5-10 minutes, scrub them, and then take them out and blow dry to prevent the sample from being contaminated again. Vacuum diffusion brazing is required as soon as possible;

[0035] The pretreated cemented carbide is subjected t...

Embodiment 3

[0044] Pre-welding treatment: Coarse the spreading test surface and brazing surface of the cemented carbide and steel on a diamond grinder, then apply diamond paste on the cast iron block, and finally place the spreading surface and brazing surface on the cast iron Grind until the surface is bright; rough-grind the 45 steel on a grinder, and then polish the spreading test surface and the brazing surface with metallographic sandpaper; cut the CuMnTi brazing material into slices, the size should be slightly larger than the brazing surface, To ensure that the amount of solder is sufficient to fill the brazing gap, polish the solder and iron sheet with metallographic sandpaper to remove the oxide layer;

[0045] During brazing, soak all the polished materials in acetone for 5-10 minutes, scrub them, and then take them out and blow dry to prevent the sample from being contaminated again. Vacuum diffusion brazing is required as soon as possible;

[0046] The pretreated cemented carbide i...

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Abstract

The invention relates to a cemented carbide and steel vacuum diffusion welding process. The cemented carbide and steel vacuum diffusion welding process comprises the steps that pre-weld treatment is carried out; Ni plating is carried out on the pretreated cemented carbide; recrystallization annealing is carried out on brazing filler metal; vacuum diffusion welding is adopted for welding dissimilarmetal of the cemented carbide and the steel, and diffusion welding is achieved by strictly controlling the process parameters such as temperature, connection pressure and connection time.

Description

Technical field [0001] The invention relates to the field of welding of dissimilar materials, in particular to a vacuum diffusion welding process of hard alloy and steel. Background technique [0002] Cemented carbide has excellent properties such as high hardness and high wear resistance, so it is widely used in mechanical processing, geological prospecting, mining and other industrial fields, but it is expensive, steel has high strength, good toughness, and easy to weld , But it is easy to wear. If steel and cemented carbide are compounded, a certain technological method is used to form a good combination between them to form a cemented carbide-steel composite wear-resistant material WC welding nail. [0003] Because cemented carbide and steel belong to the connection of dissimilar materials, it is necessary to combine the two through a specific process to form a composite welding nail, and then use the arc stud welding method to weld the WC welding nail to the alloy steel, which...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K1/008B23K1/20C23C18/36C23G1/14B23K103/18
CPCC23C18/36C23G1/14B23K1/008B23K1/20B23K1/206
Inventor 孙小傅孙锦民
Owner 自贡中兴耐磨新材料有限公司
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