金属表面形变纳米化对渗氮行为影响研究进展

表面形变纳米化技术通过外力作用使金属表面发生强烈塑性变形,形成梯度纳米-亚微米结构改性层,此独特的组织结构既能促进氮化过程,又益于形成优异的渗氮层,使金属材料整体综合性能和服役寿命显著提升,在诸多工业领域展示出良好的应用前景。表面形变纳米化因在促进渗氮中的学术和工业应用价值,已得到国内外学者广泛的关注。本文较全面地总结了表面形变纳米化对氮化促进行为方面的研究进展,并指出了存在的问题及未来发展趋势。

Research progress in effect of surface deformation nano-crystalline on nitriding behavior of metallic materials

A gradient nano-submicro-structure was obtained in metal surface via surface deformation nano-crystalline technology, which can provide severe plastic deformation on metal surface by external force. This unique gradient structure can not only be used to promote nitriding process of metallic materials, but also significantly be beneficial to form excellent nitriding layer, which can improve the comprehensive properties and service life. Therefore, it showed good application prospect in many fields. Recently, more and more investigations were focused on improving nitriding via surface deformation nano-crystalline pre-treatment, due to the academic and industrial application value. In the present article, the effect of surface deformation nano-crystalline on nitriding behavior is summarized in detail. Finally, the problems existed on the enhancement of nitriding are pointed out and it is also predicted what should be made in the future.