Microstructure Optimization and Pitting Resistance Enhancement of Selective Laser-Melted 304L Stainless Steel by Heat Treatment

被引：1
|
作者：
Ying, Danqing [1 ,2 ]
Sun, Guomin [3 ]
Wang, Meng [3 ]
Wang, Jinsheng [3 ]
Zhang, Kaiyu [1 ]
Zhou, Chengshuang [1 ]
Zhang, Lin [1 ,2 ]
机构：
[1] Zhejiang Univ Technol, Inst Mat Forming & Control Engn, Hangzhou 310014, Peoples R China
[2] Donghai Lab, Zhoushan 316021, Zhejiang, Peoples R China
[3] China Offshore Oil Engn Co Ltd, Tianjin 300451, Peoples R China
来源：
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE | 2024年 / 33卷 / 23期
基金：
中国国家自然科学基金;
关键词：
corrosion; heat treatment; passive film; SLM; stainless steel; STRAIN-GRADIENT PLASTICITY; CORROSION-RESISTANCE; INTERGRANULAR CORROSION; PASSIVE FILMS; BEHAVIOR; STRESS; EBSD; XPS; SLM;
D O I：
10.1007/s11665-023-08890-6
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The microstructures and corrosion properties of selective laser-melted (SLM) 304L stainless steel (SS) were investigated after vacuum heat treatment. The electrochemical analysis showed that heat treatment was able to improve the pitting resistance of SLM 304L SS, which was even better than that of wrought 316L SS after vacuum heat treatment at 1100 degrees C for 2 hours. The microstructure analysis showed that the 1100 degrees C heat treatment eliminated the melt pool boundaries, reduced the defect density, optimized the micro-interfaces of the material, and weakened the agglomeration of nano-oxide particles. In addition, the heat treatment increased the content of Cr2O3 in the passive film, which enhanced the stability of the passive film.
引用
收藏
页码：13221 / 13236
页数：16
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