Optimization of the normalizing and quenching procedure for WDL690D steel

This paper mainly determined the most suitable normalizing and quenching procedure for WDL690D steel after heated to and left at 910℃,930℃,950℃,970℃ respectively for 20 min,40min,60 min. Then the size of grains and the uniformity of its microstructure were observed under the metallagrapher in order to study the role time and temperature played in the normalizing and quenching structure. Finally according to the integrated analysis for characteristics and size of grains of normalizing and quenching microstructure,the optimum time and temperature of quenching were determined to be 950℃ and 40 min.