doi:10.16186/j.cnki.1673-9787.2020.5.11

Received:2019/11/29

Revised:2020/02/26

Published:2020/09/15

Experimental study on surface quality of hardened 42CrMo steel processed byultrasound-assisted grinding

XIANG Daohui, NIU Xiaoxiao, LI Zhangdong, LIU Zhongyun, FENG Haoren, WU Bangfu, CHEN Yanbin

School of Mechanical and Power Engineering，Henan Polytechhic University,Jiaozuo 454000 ， Henan,China

Abstract:Hardened 42CrMo steel is used to manufacture various parts with high loads， alternating loads， high precision and other fatigue damage failure because of its high strength， high toughness and excellent hardenability. The hardness of this material is high， so the common processing method to process it is difficult， and the surface stress is uncontrollable and has poor quality. Ultrasound-assisted grinding has excellent performance in processing hard and brittle materials. In this paper， the experimental analysis of hardened 42CrMo steel was carried out by means of axial ultrasonic vibration-assisted grinding and conventional grinding. The surface qualities of the two grinded steels were measured and analyzed by various measuring instruments. The results showed that the residual compressive stress of the surface was increased by 11. 0%~30. 8% . The surface morphology was better than that of conventional grinding. The surface roughness of the surfacewas reduced by about 80% after ultrasound assisted grinding. The surface microhardness was about 10% higher than that of conventional grinding.

Key words:hardened 42CrMo steel;ultrasound-assisted grinding;surface quality;surface residual stress

超声辅助磨削淬硬42CrMo钢表面质量试验研究_向道辉.pdf