Some features of cutting tool wear in finish machining of low-porosity alloy powder metallurgy steels

Conclusions The presence in powder metallurgy steels being machined of voids even in an insignificant quantity has a significant influence on the amount and character of wear of the cutting tool. Even a decrease in residual porosity to 0.5% provides a significant increase in cutter life.In connection with the fact that the character of wear of sintered carbide cutters in machining of low alloy powder metallurgy is primarily adhesive, VK8 cutters, which have higher cyclic impact strengths, have the best life.As tool materials in machining of powder metallurgy steels at cutting speeds of more than 200 m/min it is desirable to use mineral ceramic materials.Translated from Poroshkovaya Metallurgiya, No. 2(254), pp. 74–79, February, 1984.