Oxide Formation In Metal Injection Molding Of 316L Stainless Steel

Archives of Metallurgy and Materials

Jin Man Jang¹  Wonsik Lee¹  Chulwoong Han¹  Hanshin Choi¹  Se-Hyun Ko¹ 

[1] KOREA INSTITUTE OF INDUSTRIAL TECHNOLOGY, INCHEON, 406-840, KOREA

关键词: Keywords: Powder injection molding;    Sintering;    316L stainless steel;    Sintering atmosphere;    Micro part;   

DOI  :  10.1515/amm-2015-0114

学科分类：金属与冶金

来源: Akademia Gorniczo-Hutnicza im. Stanislawa Staszica / University of Mining and Metallurgy

【 摘 要 】

The effects of sintering condition and powder size on the microstructure of MIMed parts were investigated using water-atomized 316L stainless steel powder. The 316L stainless steel feedstock was injected into micro mold with micro features of various shapes and dimensions. The green parts were debound and pre-sintered at 800°C in hydrogen atmosphere and then sintered at 1300°C and 1350°C in argon atmosphere of 5torr and 760torr, respectively. The oxide particles were formed and distributed homogeneously inside the sample except for the outermost region regardless of sintering condition and powder size. The width of layer without oxide particles are increased with decrease of sintering atmosphere pressure and powder size. The fine oxides act as the obstacle on grain growth and the high sintering temperature causes severe grain growth in micro features due to larger amount of heat gain than that in macro ones.

【 授权许可】

Unknown