FRICTION AND WEAR BEHAVIORS OF Al2O3-BASED CERAMIC COMPOSITE USING AS WIRE DRAWING DIES

YANG Xuefeng  DENG Jianxin  YAO Shuqing

(College of Mechanical Engineering, Shandong University, Jinan 250061)

Abstract: Al₂O₃-based ceramic composite is produced using hot pressing sintering, it can be used to manufacture wire drawing dies. Work out the stress distributing of wire drawing dies at drawing process and point out the maximum region and the most wear and tear region. The friction and wear behaviors of the composite are the mostly influenced with the wire drawing dies working life. Therefore friction and wear behaviors of the composite are studied at high speed wear and tear test machine. Test and work out the coefficient of friction and the wear rate of Al₂O₃-based ceramic composite at the different rotate speed and the different load, point out the change trend of it. Observation the Al₂O₃-based ceramic composite microcosmic shape used by scanning electronic microscopy micrographics, the wear mechanism of the Al₂O₃-based ceramic composite is furrow, adhere and brittleness break off. Results show that the Al₂O₃-based ceramic composite has strong fracture toughness and wear resistance. The wear mechanism of Al₂O₃-based ceramic composite are mostly brittleness break off and furrow, it has great capabilities in wear resistance, and it is a preferable materials for wire drawing dies.

Key words: Ceramic composite Wire drawing dies Friction and wear Preparation

CLC No: TQ174.758

国家自然科学基金(50475133)和新世纪优秀人才支持计划(NCET- 04-0622)资助项目. Received 20051027, received in revised form 20051215