Process for the preparation of composite cubic boron nitride material

Abstract

This invention relates to a kind of preparation method of cubic boron nitride compound material. Mixing the cubic boron nitride grain and alloy braze powder and binder and coating it on the surface of steel substrate, then heating by vacuum brazing can form the cubic boron nitride layer on the surface of steel substrate. The alloy brazes powder composed by the following elements (Wt. %): Ti 5-15, Sn 6-12, remains Cu. The cubic boron nitride compound layer has the high combination intensity can bear higher temperature and has higher total mechanical character.

Description

technical field [0001] The invention relates to a method for preparing superhard and wear-resistant composite materials by using cubic boron nitride. Background technique [0002] The molecular structure, physical properties and synthesis method of cubic boron nitride (c-BN) are very similar to diamond, its hardness is second only to diamond, and its thermal stability and chemical stability are better than diamond, and it can be heated in the atmosphere to Oxidation does not occur at 1000°C, especially there is no limitation of the reaction of black iron-based alloys processed by diamond products. It has become a new generation of superhard materials and is used as a substitute for diamond by the international material industry. In recent years, with the reduction of the production cost of cubic boron nitride and the improvement of its performance, the amount of cubic boron nitride and its products compared with the amount of diamond has increased from 1 / 20-1 / 30 to 1 / 6, and ...

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Problems solved by technology

Silver-based solder has a low melting point and good process performance, but the cost of cubic boron nitride products brazed with silver-based solder is high, and the working temperature is low (400 ° C), it is difficult to meet the requirements of cubic boron nitride itself as a high-temperature wear-resistant material. usage of