THE INFLUENCE OF A BAROTHERMAL TREATMENT ON THE STRUCTURE OF CEMENTED CARBIDE WC–4Co

Abstract

The results of researches of treatment of cemented carbide WC–4Co under high pressure (4.5 GPa) and temperature (1310–1450 ° С) are observed. Processing of pre-sintered samples in a vacuum was carried out in a high pressure apparatus. The studying of the microstructure of samples of cemented carbides was carried out by methods of metallographic analysis. It is shown that barothermal treatment of cemented carbide leads to a decrease in the porosity and defects in the structure of the cemented carbide processed under high pressure conditions. The results of the study may be useful in the development of structural elements of high pressure apparatus for the synthesis and sintering of superhard materials