期刊论文

激光熔覆含氮奥氏体不锈钢层的组织与性能

Qiu, C.

英文

中国激光

0258-7025

2020

47

4

0402004

10.3788/CJL202047.0402004

国家重点研发计划(2018YFB1105800) 国家自然科学基金(51474130)。

本校为第一且通讯机构

In this study, AISI304 powder processed with solution-nitriding in super pure nitrogen flow as raw material was used to prepare austenite stainless steels cladding layer with different nitrogen contents to obtain the laser cladding layer of nitrogenous austenitic stainless steel with excellent comprehensive performance. Results show that nitrogen precipitates during laser cladding process and pores appear in the cladding layer. As the nitrogen content in powder increases, the nitrogen content in the cladding layer gradually increases, the poros...

为了获得综合性能优良的含氮奥氏体不锈钢激光熔覆层,以经过超高纯氮气处理的固溶渗氮AISI304粉末为原料,采用激光熔覆技术制备了不同氮含量的奥氏体不锈钢熔覆层,并对熔覆层的组织和性能进行了研究。研究结果表明:在激光熔覆过程中存在氮的析出,熔覆层中存在气孔;随着粉末中的氮含量增加,熔覆层中的氮含量逐渐增加,孔隙率先增大后减小,强度明显提高,但断后伸长率逐渐下降。对于采用氮质量分数为0.41%的粉末制备的熔覆层,其氮的质量分数为0.25%,抗拉强度为(856±20) MPa,屈服强度为(747±15) MPa,断后伸长率为(22±3)%,平均显微硬度为280.68 HV0.2;对于采用氮质量分数为0.16%的粉末制备的熔覆层...