Manufacturing method of copper-iron-based diamond cutter teeth

Abstract

The invention discloses a manufacturing method of copper-iron-based diamond cutter teeth. The manufacturing method comprises the following steps that framework materials and bonding metal are used forpreparing base body materials, mixing is carried out after preparation, loading is carried out after mixing for hot press molding, cooling is carried out after hot press molding, mechanical machiningis carried out after cooling, powder in the base body material preparation process comprises 40% of Cu, 30% of Fe, 8% of Sn, 12% of Ni and 10% of WC, diamond accounting for 7% o the total weight o the base body materials is added in the mixing process, and the diamond adopts 30% of 35 / 40-meshed diamond, 40% of 40 / 45-meshed diamond and 30% of 45 / 50-meshed diamond. Fe powder is added to replace some WC powder, the production cost is reduced, Sn powder can improve the wettability of bonding metal for diamond, the alloy melting point is effectively lowered, powder pressing performance is improved, Ni powder can enhance the base body mechanical property, low-melting-point metal loss is restrained, WC powder is high in thermal conductivity and has the heat expansion coefficient approximate to that of diamond, and the elasticity modulus and hardness are high.

Description

technical field [0001] The invention relates to the technical field of diamond cutter teeth, in particular to a method for manufacturing copper-iron-based diamond cutter teeth. Background technique [0002] In the process of manufacturing diamond teeth on the market, some cemented cutting elements are needed to make diamond binders. The binders are divided into metal binders, resin binders, ceramic binders, etc., among which metal binders It is the main ingredient in making diamond tools. The existing production process is to add metal powder such as copper, cobalt, nickel, tin and other metal powders into artificial diamond and mix them. After high temperature (above 800°C) hot pressing and sintering, the diamond cutter teeth are made, and then the diamond cutter teeth are welded to the steel drill pipe. A thin-walled diamond drill bit is made on top of it, and the metal powder is prepared to increase the density of the skeleton material. Usually, a mixed particle size is ...

AI Technical Summary

Problems solved by technology

The existing production process is to add copper, cobalt, nickel, tin and other metal powders into artificial diamond and mix them. After high temperature (above 800°C) hot pressing, sintering and cooling, the diamond teeth are made, and then the diamond teeth are welded to the steel drill pipe. Thin-walled diamond drill bits are made on top, and the preparation of metal powder is to increase the density of the skeleton material. Usually, mixed particle sizes are used. The drill bit made of diamond cutter teeth in the prior art has a poor drilling effect, and has low strength and poor wear resistance. , short service life

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