Performance of the cutting tool equipped with PcBN of the BL group for high-speed processing of hardened steel

Abstract

The paper investigates PcBN cutting tools of the BL group developed at the Institute of Superhard Materials, made with the addition of ceramic components TaN, TiC, TiN. Such materials are classified as ceramic-matrix composites (CMC). The hardness of the new modifications of composites for cutting tool purposes ranged from 31,2 to 40,2 GPa. Experimental studies were carried out under the conditions of high-speed cutting of hardened steels ShKh15 and KhVG. The performance of superhard composites was studied based on the criterion of the absence of brittle destruction of the cutting edge of the tool, and the effectiveness of new composites based on the criterion of the minimum intensity of wear of the clearance face of the indexable inserts when machining with cutting modes corresponding to the conditions of finishing. High performance parameters – quality of the finish and minimum intensity of wear have been demonstrated by tools equipped with CMC, which contain a matrix formed by titanium carbide.

Keywords

• wear
• tool performance
• wear intensity
• hardened steels
• finishing
• superhard composites