等温扩散对氮碳共渗不锈钢表面的硬度影响的研究  

Study on Effects of Isothermal Diffusion on Surface Hardness of the Nitrocarburized Layer of Stainless Steel

作　　者：江亮[1] 罗厚杉[1] 赵程[1] 

机构地区：[1]青岛科技大学机电工程学院,山东青岛266061

出　　处：《热处理技术与装备》2011年第5期25-27,共3页Heat Treatment Technology and Equipment

摘　　要：利用等温扩散降低经盐浴氮碳共渗处理后的AISI 316L奥氏体不锈钢表面的硬度,并对硬化层的组织和性能进行分析研究。试验结果表明,等温扩散在允许的范围内降低了试样表面的硬度。在460℃时,随着扩散时间的延长,不锈钢表面的硬化层的厚度增加,最大厚度能达到了70μm。等温扩散后比扩散前的渗层更厚,硬度梯度更缓和。The surface hardness of nitrocarburized AISI 316L stainless steel can be treated by isothermal diffusion, and the microstructures and properties of the carburized layer are investigated. The results show that its surface hardness is reduced after isothermal diffusion, the thickness of hardened layer of the stainless steel is increased with increasing diffusion time at 460 ℃. The maximum thickness can reach 70 um , and the thickness of nitrocarburized layer is thicker after diffusion than before one, and the hardness gradient is more gentle.

关 键 词：等温扩散 氮碳共渗 硬度 

分 类 号：TG156.82[金属学及工艺—热处理]