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Processing method after alloy cutter welding

A technology of alloy cutters and processing methods, which is applied in the field of hardware cutter manufacturing, can solve the problems of cutter fracture cracks, low hardness of welding materials, and high hardness of cemented carbide, so as to eliminate internal stress, avoid falling off, and ensure welding quality.

Inactive Publication Date: 2010-05-19
常州市万绥工具厂
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  • Abstract
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Problems solved by technology

[0002] Traditional alloy cutting tools are formed by welding cemented carbide blades to the head of the steel substrate. Due to the large difference between the thermal expansion coefficient of the cemented carbide blade, the thermal expansion coefficient of the steel substrate, and the thermal expansion coefficient of the welding material, the welding During the process, a large internal stress is generated, and the larger the tool size is, the greater the internal stress is. Therefore, fracture cracks are generated inside the welded tool after welding, and the cemented carbide blade is easy to fall off.
Generally, in order to prevent cracks from falling off inside the welding, the welded tool will be directly buried in lime or quartz sand and slowly cooled naturally, but this method will also produce cracks because of the different shrinkage of the three materials, cemented carbide The hardness is high, and the hardness of the welding material is small, and it is easy to separate after the two are combined

Method used

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Embodiment Construction

[0014] The processing method of the alloy cutting tool after welding, the method steps are as follows, welding, the hard alloy blade is welded and fixed on the cutter head of the cutting tool by silver welding material to obtain the alloy cutting tool, because the silver welding material has a low melting point and good germination, it can be used in welding During the process, the internal stress can be reduced, the oxidation of the material surface can be prevented, and the welding can be ensured evenly;

[0015] Surface treatment, the welded part of the alloy tool obtained after welding is treated to remove oil, impurities and rust spots on the surface;

[0016] Heat preservation, place the alloy cutter obtained after surface treatment in an oven with a temperature of 200°C, heat it for 8 hours to 250°C, stop heating, and then place the alloy cutter in the oven to cool naturally;

[0017] Hot oil qualitative, place the alloy cutter naturally cooled in the oven in step c in ...

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Abstract

The invention relates to the technical field of hardware cutter manufacture, in particular to a stress processing method after alloy cutter welding. The method adopts the steps of welding, surface processing, heat preservation, hot oil quality determination and the like for processing an alloy cutter so as to eliminate the internal stress of an alloy cutter. The invention can effectively eliminate the internal stress generated after welding, avoid the falling-off of an alloy blade due to weld cracks of the cutter, and ensure the welding quality.

Description

technical field [0001] The invention relates to the technical field of hardware cutter manufacturing, in particular to a stress treatment method for alloy cutters after welding. Background technique [0002] Traditional alloy cutting tools are formed by welding cemented carbide blades to the head of the steel substrate. Due to the large difference between the thermal expansion coefficient of the cemented carbide blade, the thermal expansion coefficient of the steel substrate, and the thermal expansion coefficient of the welding material, the welding In the process, a large internal stress is generated, and the larger the tool size is, the greater the internal stress is. Therefore, fracture cracks are generated inside the welded tool after welding, and the carbide blade is easy to fall off. Generally, in order to prevent cracks from falling off inside the welding, the welded tool will be directly buried in lime or quartz sand and slowly cooled naturally, but this method will ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/00C22F1/08C22F1/14
Inventor 朱剑鑫杨世华
Owner 常州市万绥工具厂