Study of Influence of Magnetic-Pulse Hardening on Cutting Tools Strength and Wear Resistance

Abstract

We presented the results of the laboratory studies of pulsed magnetization of blade tools, whose cutting part is made of hard alloy (cutters) and high-speed steel (drills). We described the technique of the laboratory experiment with parameters of treatment modes of cutting, magnetization, the equipment which was used, and introduced tool wear evaluation criteria. It was established that during pulsed magnetization wear resistance of cutting tools increases. The orientation of the domains, enhanced particle cohesiveness largely inhibits the movement of interdomain boundaries. An attempt was made to evaluate the state of the cutting part of magnetized and non-magnetized tool by analyzing analytical dependences of thermal stress which arises in the cutting process and causes brittle fracture of the tool. The analysis of the calculations done with the allowance for the set of physico-mechanical parameters of magnetized tool materials can lead to the conclusion that magnetized tool materials have the effect of thermal stress weakening though it is negligible.