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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 13    No. 6    December 2003

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Numerical simulation of iron/TiC ceramic tappet brazed with TiZrNiCu filler metal
ZHANG Li-xia(张丽霞), FENG Ji-cai(冯吉才), LI Zhuo-ran(李卓然)

National Key Laboratory of Advanced Welding Production Technology,
 Harbin Institute of Technology, Harbin 150001, China

Abstract:Maximum value of thermal stress and stress concentration zones of iron/TiC ceramic tappet during cooling were studied. The results show that when the temperature is 300K, the maximum values of shear stress and tensile stress on iron/TiC ceramic interface both appear on the tip of TiZrNiCu/iron interface, so cracks always originate from TiZrNiCu/iron interface. Positive tensile stress on iron undersurface relaxes to the inner of iron and negative tensile stress on iron undersurface concentrates on the side of iron as the temperature declines, which leads to the origination of cracks on iron undersurface because of the alternation between positive and negative tensile stress.

 

Key words: numerical simulation; TiC ceramic; iron; brazing

ISSN 1672-7029
CN 43-1423/U

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