38CrMOAlA钢激光淬火+氮化复合处理

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一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100Hv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 Compound Treatment of 38CrMoAlA Steels

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.