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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 9    No. 2    June 1999

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THERMAL DEBINDING MECHANISM OF METAL INJECTION MOLDING COMPACTS IN VACUUM
Liu Shaojun, Huang Baiyun, Qu Xuanhui, Zhong Xiaoxian, Yan Wuhua and Li Yiming

The State Key Laboratoryfor Powder Metallurgy,Central South University of Technology, Changsha 410083, P. R. China

Abstract:The processing of the thermal debinding in vacuum using water atomized 316L stainless steel powder and wax-based multicomponent binder were systemically studied. The thermal debinding velocity in vacuum was analyzed under the conditions of different binders and different rising temperature rates, especially the low temperature thermal debinding kinetics in vacuum. The processing of thermal debinding in the flowing H2was also compared with the processing in vacuum. The binder removal rate in vacuum was faster than that in the flowing H2, but the control of defect is more difficult. The reason was that the gas pressure in the green parts was higher than that in environment.

 

Key words: powder injection molding vacuum thermal debinding

ISSN 1672-7029
CN 43-1423/U

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