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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 9    No. 1    March 1999

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LOW TEMPERATURE THERMAL DEBINDING BEHAVIOR OF WAX-BASED MULTI-COMPONENT BINDER FOR TUNGSTEN HEAVY ALLOY①
Fan Jinglian, Huang Baiyun, Qu Xuanhui and Li Yiming

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

Abstract:To control the defects in thermal debinding stage, low temperature thermal debinding behavior of wax in the multi-component binder for tungsten heavy alloy was studied. The wax burnout temperature is below 250℃, at which the defects mainly occur. The debinding rate is controlled by the diffusion of wax in the polymer to the inner surface of pores and then to the external environment. The experiment proved the amount of removed wax as an exponential function of time, the reciprocal sample thickness and temperature coeffcient.

 

Key words: thermal debinding multi-component binder tungsten heavy alloy

ISSN 1672-7029
CN 43-1423/U

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