高频微锻造对45钢激光淬火层表面性能的影响

本文利用超声频微锻造机构对45钢激光淬火层表面进行了微锻造处理。利用OM、SEM观察了微锻造对45钢激光淬火层表面组织的影响;利用显微硬度计与洛氏硬度计研究了微锻造后45钢激光淬火层表面显微硬度,硬化深度方向的显微硬度。结果表明:高频微锻造处理后,45钢激光淬火形成的明显而规则马氏体组织被锻碎,表面晶粒明显细化。表面显微硬度提高了11.4%,激光淬火强化区深度方向的显微硬度影响深度为0.2 mm,其中0.1 mm处硬度提高了10.0%,0.2 mm处提高了4.5%。

Experimental Study of High Frequency Micro-forging on Laser Hardening Layer of Steel 45

In this paper, 45 steel laser quenching layer was micro-forged by institutions of super audio micro forging, the influence of micro-forging on surface organization of 45 steel laser hardening layer was observed by OM, SEM ; Using microhardness tester and rockwell hardness tester, surface hardness and microstructure rockwell hardness on 45 steel laser hardening layer were tested after micro-forging, and micro hardness change along the direction of hardening depth were studied. The results show that： after high frequency micro forging processing, the obvious and regular martensite organization of steel 45 formed by laser quenching was broken into pieces, microhardness on forging surface increased by 11.4%, the influence depth of micro hardness along the laser quenching strengthen zone was 0. 2 mm, the 0. 1 mm hardness is increased by 10%, 0.2 mm increased by 4.5%.