Peculiarities of Compacting during Sintering of VH8M Alloy with Addition of Nanosized Tungsten Carbide

Abstract

There were introduced shrinkage curves of alloys obtained from hard-alloy mixtures based on WC-8%Ni, activated by means of introduction of 10 % nano-sized WC, and charging material without additives over the ranges of temperature 800–1500 °C. There was investigated pore structure and microstructure of specimens on the different stages of sintering. There was uncovered peculiarity of modified alloy’s compression that involves disalign- ment of shrinkage curve in field of more low temperatures. This is allows decrease temperature of its vacuum compression sintering, obtain more fine- grained structure and attain high indices of hardness/enduring quality, without decreasing of strength characteristics. There were investigated physi- cal and mechanical properties and microstructure of compression sintering specimens from activated alloy VN8M and standard VH8 without additives