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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 12    No. 6    December 2002

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Influence of diffusion time on steel-mushy Al-7graphite bonding
DU Yun-hui(杜云慧)1, ZHANG Peng(张 鹏)1,ZENG Da-ben(曾大本)2,
CUI Jian-zhong(崔建忠)3,BA Li-min(巴利民)4

1. Department of Mechanical Engineering,
Northern Jiaotong University,Beijing 100044, China;
2. Department of Mechanical Engineering,
Tsinghua University, Beijing 100084, China;
3. Metal Forming Department, Northeastern University, Shenyang 110006, China;
4. Anshan Automobile Fittings Factory,Anshan 114014, China

Abstract:The bonding of steel plate to Al-7graphite slurry was conducted using casting rolling technique. The influence of diffusion time on interfacial mechanical property and structure of bonding plate was studied. The results show that: under the condition of 510℃ for preheat temperature of steel plate and 32% of solid fraction of Al-7 graphite slurry, the relationship between interfacial shear strength S and diffusion time t is S=25.3+4.47t-0.133t2+0.001t3. When diffusion time is 22.5s, the largest interfacial shear strength 69.9MPa is got, and the corresponding interface is made up of Fe-Al compound and Fe-Al solid solution alternatively and in a right proportion.

 

Key words:   diffusion time; interfacial shear strength; interfacial structure

ISSN 1672-7029
CN 43-1423/U

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