The features of wear of steel Р6М5-based composition coating in tribocontact with steel ShKh15 in a wide range of velocities and loads

Abstract

The paper introduces the results of investigation of friction surface structure and tribotechnical characteristics of steel Р6М5-based composition coatings after friction with a steel disc in the range of slip velocities from 1,2 to 3,6 m/s and loads from 20 to 100 N. The authors have determined two extremely gross wear areas and two areas of steady-state wear in the friction pair steel Р6М5-steel ShKh15. For friction pair "steel Р6М5 + 20 wt. % WC" - steel ShKh15 the authors have determined the considerable reduction of composition coating wear rate (2-3 times) in comparison with the steel Р6М5-based coating. The wear rate of composition coating grows linearly with the load; it is connected with oxidative wear development.

Keywords

• high speed steel
• composition coating
• sliding friction
• wear
• microstructure