Bryansk, Bryansk, Russian Federation
The article presents the results of research for upsetting tool inserts made of hard alloy VK-20 different manufacturers. All studies were performed according to standard procedures using cer-tified equipment. The results showed that the majority of the inserts (80%) did not meet the re-quirements of GOST 3882-74 for a hard alloy VK20
hard alloy, stamped, planting, density, hardness, technique.
1. Kiffer, R. Hard alloys: [transl. from Deutch] / R. Kiffer, F. Benezovsky. - M.: Metallurgy, 1971. - 392 p.