A kind of manufacturing method of cemented carbide steel composite cutting tool

Abstract

The invention discloses a manufacturing method of a hard alloy steel composite cutter, and relates to the manufacturing method of the composite cutter. The manufacturing method aims to solve the problems that when the hard alloy steel composite cutter is prepared, the residual stress of a joint is high, and the hardness of a hard alloy is reduced. The method comprises the following steps that a graphene is transferred to a to-be-welded surface of the hard alloy, then a brazing filler metal connecting plate is placed between the to-be-welded surface of the hard alloy and a to-be-welded surfaceof a steel cutter plate, and then brazing is carried out, wherein the brazing filler metal connecting plate is formed by stacking a plurality of layers of BNi2 brazing filler metal foils, one layer ofnet-shaped carbon nano tube segments and one layer of Cu foil sheets. According to the method, the graphene is transferred to the to-be-welded surface of the hard alloy, dissolution of the hard alloyinto a brazing filler metal can be inhibited during brazing, and hardness reduction of the hard alloy is avoided; by adding the net-shaped carbon nano tube with the low expansion coefficient, the problem that the side stress of the hard alloy is large is solved; and the method is suitable for preparing the hard alloy steel composite cutter.

Description

technical field [0001] The invention relates to a manufacturing method of a compound cutter. Background technique [0002] Cutting is one of the most important processes in the wood processing industry. With the continuous advancement of processing technology, the continuous diversification of workpiece materials and the continuous improvement of the automation of processing equipment, the requirements for the performance of cutting tools are also getting higher and higher. As a big country in the wood processing industry, it is of great significance to develop advanced woodworking cutting tool manufacturing methods and improve the performance of tool technology to increase the technological content of the wood processing industry and enhance the core competitiveness of the industry. [0003] Cemented carbide is a powder metallurgy product made of refractory metal carbides with extremely high hardness such as WC (tungsten carbide) and sintered with Co as a binder. It has hig...

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Problems solved by technology

[0008] In order to solve the problems of high joint residual stress during the preparation of existing cemented carbide steel composite cutting tools and the reduction of cemented carbide hardness caused by the dissolution of cemented carbide into the solder during the connection process, the present invention proposes a cemented carbide composite tool How to make knives

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