Effect of Quenching and Partitioning Parameters on Mechanical Properties of aMedium Carbon Low Alloy Steel

In automotive industry, economic, environment and particularly safety parameters, are leading to thedevelopment of advanced high strength steels (AHSS) with improved mechanical properties. One of the mostpromising heat treatments for the production of AHSS is quenching and partitioning (Q&P) process. Theapplication of this process in various times and temperatures leads to interesting combinations of mechanicalproperties containing of high strength and good ductility. In this investigation, changes of mechanicalproperties influenced by change of partitioning time and temperature on ۱.۵۱۴۲ steel was studied. The resultsshowed that application of Q&P process on the steel causes severe increasing of hardness. Increasing ofpartitioning temperature and also time, leads to decreasing of hardness and increasing of elongation. Withincreasing of partitioning time, tensile strength initially increases and then decreases and increasing ofpartitioning temperature leads to decreasing of strength and increasing of elongation and ductility.

Keywords:

Quenching , Partitioning , Strength , Elongation , Q&P.