OPTIMIZATION OF PM PARTS FOR WEAR RESISTANCE DESIGN CRITERIA FOR DRY ROLLING-SLIDING WEAR

摘要

Wear is a cause of failure for many industrial parts produced by Powder Metallurgy (PM), for example gears or cams, which are subjected to rolling and rolling-sliding wear, dry or lubricated depending on the application. The aim of this work is to improve the systematic design approach proposed in a previous work highlighting how the characteristics of the materials can be modified to enhance the wear resistance of PM components. The work is focused on components subject to dry rolling-sliding wear. The results obtained from the dry rolling-sliding tests performed on PM steels obtained under different process conditions have been used as knowledge base in the proposed design methodology. The application of the design criteria allowed identification of the material characteristics and how they can be modified to improve wear resistance.