Effect of Quenching on Microstructure and Hardness of Cr-Mo-Ni-Mn-Si Low Alloy Wear Resistant Steel
Author of the article:YANG Jinde;DING Xu
Author's Workplace：Engineering Training Center,Guizhou University,Guiyang 550025,China;School of Mechanical Engineering,Guizhou University,Guiyang 550025,China
Key Words：low alloy wear resistant steel quenching microstructure hardness
Abstract：The quenching test of Cr-Mo-Ni-Mn-Si low alloy wear resistant steel at different temperature and holding time was carried out.The effects of quenching temperature and holding time on the microstructure and hardness of the low alloy steel were studied by microstructure observation and hardness test.The results show that the optimal quenching process of Cr-Mo-Ni-Mn-Si steel is 860℃×30 min heat holding and oil quenching.The microstructure of Cr-Mo-Ni-Mn-Si steel is fine lath martensite plate,and the hardness reaches the maximum of 44.8 HRC.With the increase of quenching temperature and holding time,the martensite in the steel coarsenes gradually,the spacing increases,and the hardness value decreases gradually.
