Fabrication and sintering behavior of high-nitrogen nickel-free stainless steels by metal injection molding

Zi-wei Xu~(1)),Cheng-chang Jia~(1)),Chun-jiang Kuang~(2)),and Xuan-hui Qu~(1)) 1) School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China 2) Powder Metallurgy Division,Advanced Technology & Materials Co.Ltd.,Beijing 100081,China

摘 要：<正>High-nitrogen nickel-free stainless steels were fabricated by the metal injection molding technique using high nitrogen alloying powders and a mixture of three polymers as binders.Mixtures of metal powders and binders with various proportions were also investigated, and an optimum powder loading capacity was determined as 64vol%.Intact injection molded compacts were successfully obtained by regulating the processing parameters.The debinding process for molded compacts was optimized with a combination of thermo-gravimetric analysis and differential scanning calorimetry analysis.An optimum relative density and nitrogen content of the specimens are obtained at 1360℃,which are 97.8%and 0.79wt%,respectively.

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