Features of Influence of Sintering Conditions of Fine-Grained WC—10Co Cemented Carbide on Its Structure, Physical-Mechanical and Operational Characteristics

Аннотация

The results of a study of the influence of the environment during sintering of fine-grained WC—10Co cemented carbide on its structural characteristics and physico-mechanical properties, as well as the operational durability and wear mechanisms of the cutting plates of this alloy in impact cyclic turning process of 40Kh steel parts are presented. It is shown that the sintering of a cemented carbide in vacuum as compared with sintering in a methane-hydrogen environment reduces the residual microporosity of its structure, improves the physico-mechanical properties and operational durability of the cutting plates made from it. A new phenomenon was found to be the formation of continuous chip in the conditions of discontinuous turning of 40Kh steel parts and the welding it to a working part of a cutting plate from WC-10Co cemented carbide sintered in vacuum, and the absence of such a phenomenon for an alloy sintered in a methane-hydrogen environment.