Effect of Surface Modification Technology on Microstructure and Properties of 38CrMoAl Steel

Author of the article:ZHU Fankang, YANG Jianzhi, ZHANG Weiwen, XIAN Kuyuan

Author's Workplace：Guangzhou Huagong Opto-mechatronics Technology Co., Ltd., South China University of Technology, Guangzhou 510640, China

Key Words：Guangzhou Huagong Opto-mechatronics Technology Co., Ltd., South China University of Technology, Guangzhou 510640, China

Abstract：The microstructure, surface phase structure, hardness, wear resistance and corrosion resistance of 38CrMoAl steel were studied by carbonitriding, nitriding and pulsed vacuum nitriding. The results show that the surface microstructure of carbonitriding samples is tempered martensite. The surface structure of nitriding samples is Fe24N10 compound. The surface structure of pulse vacuum nitriding sample is Fe2-3N compound. The surface hardness of pulsed vacuum nitriding sample is the highest, and the hardness is 1 026 HV, and the wear of pulsed vacuum nitriding sample is the least. Nitrocarburizing sample has the best corrosion resistance, and its corrosion grade is 4.