Use of Plasma Hardening for Circular Knives

Abstract

Durability of cutting tools for the processing of materials determines the effectiveness of metallurgical enterprises. In this regard, the use of advanced methods of cutting tool hardening is an important industrial challenge. The main cause of the circular knives failure are cutting edge jams and chipping in the cutting part. To prevent such defects plasma hardening of the cutting edge knives was made. The results showed that pitting and dulling of the cutting edge stopped completely. Circular blades began to work in the mode of self-sharpening that raised the cut quality and service life of the blades. This is due to the increased amount of austenite and the hardened layer forming characteristics of HAZ structure.