38CrMoAlA钢激光淬火+氮化复合处理

Laser Quenching+Nitriding Compound Treatment of 38CrMoAlA Steels

对 38CrMoAlA钢分别经激光淬火、气体氮化、氮化 激光淬火复合处理及激光淬火 氮化复合处理的硬化层深度及其表面硬度分布进行了比较分析。结果表明 ,试验条件下 ,激光淬火 氮化复合处理与氮化处理相比 ,表层硬度可提高 10 0Hv左右 ,硬化层深度有少许增加 ;在氮化 激光淬火复合处理中 ,激光淬火可使预先氮化处理的硬化层深度有大幅度的提高 ,表层硬度有所下降 ;氮化 激光淬火复合处理比激光淬火的表面硬度高 ,硬化层深度较浅。

Laser quenching, nitriding, nitriding-laser quenching compound treatment and laser quenching-nitriding compound treatment on 38CrMoAlA steels are carried out, and theirs depth of hardening layers and their surface hardness are investigated. The experimental results show that the laser quenching -nitriding compound treatment may raise surface hardness by 100Hv than by using nitriding only and the depth of hardening layers is not increased; that the laser quenching may raise the depth of hardening layers of previous nitriding in the nitriding-laser quenching compound treatment and the surface hardness drops; the depth of hardening layers and the surface hardness in the nitriding-laser quenching compound treatment are shallower and higher than the laser quenching, respectively.