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ABSTRACT
To find a proper super alloy applied to gasoline engine turbochargers which demand a high operating temperature over 950°C, the IN713C super alloy was investigated in this study. The rheological properties of feedstock, density, microstructure and mechanical properties were measured. The proper powder loading was 61 vol.-%. Through the analysis of viscosity, 160°C was supposed to be more suitable for the injection. After debinding, most binder components were removed. A reasonable debinding process was formulated. Two pre-sintering temperature (850, 950°C) were investigated, then 850°C was considered to be more proper relatively. The samples were sintered at different temperatures for various time. The best properties of sintered parts were obtained when sintered at 1300°C for 3 h, the density of sintered parts was 7.83 g cm−3 while the hardness was 43.6 HRC and tensile strength was 1216.9 MPa.
Disclosure statement
No potential conflict of interest was reported by the authors.
Notes on contributors
Duxin Li is a professor at the State Key Laboratory of Powder Metallurgy, Central South University. He has been engaged in the field of polymer materials and injection moulding for many years.
Donghua Pan, Chenming Zhang and Wei Wu are postgraduate students ofthe State Key Laboratory of Powder Metallurgy, Central South University. They are mainly engaged in metal injection molding research.
Renwei Lu, Zhongchen Yang, graduated from the State Key Laboratory of Powder Metallurgy, Central South University. They are currentlyworking in Changsha Juzhong Metallurgy Technology Co., Ltd., engaged in metal injection molding research and product development.