Effect of Partitioning Time and Temperature during Q&P Process on Mechanical Properties of 1.5142 Steel

Safety، economical and environmental problemsin automotive industry are leading to the development of advanced high strength steels (AHSS) with improved mechanical properties. One of the newest and most promising heat treatments for the production of AHSS is quenching and partitioning (Q&P) process. The application of this new process in various times and temperatures leads to interesting combinations of mechanical properties including high strength and good ductility. In this study،variations of mechanical properties influenced by variation of partitioning time and temperature on 1. 5142 steel was investigated. The results showed that application of Q&P process on the steel causes severe increasing of hardness. Increasing of partitioning time and also temperature leads to decreasing of hardness and increasing of elongation. With increasing of partitioning time، tensile strength initially increases and then decreases،However، increasing of partitioning temperature leads to decreasing of strength and increasing of elongation and ductility.