Wear behaviors and lubrication medium of TiC/Al_2O_3 ceramic wire drawing dies  

作　　者：杨学锋 邓建新 王慧 昃向博 

机构地区：[1]Department of Mechanical Engineering,University of Jinan [2]Department of Mechanical Engineering,Shandong University

出　　处：《中国有色金属学会会刊：英文版》2007年第A02期663-666,共4页Transactions of Nonferrous Metals Society of China

基　　金：Project(B0614) supported by the Natural Science Foundation of University of Jinan, China;Project(20030422105) supported by the Specialized Research Fund for Doctoral Program of Higher Education, China;Project(Y2004F08) supported by the Natural Science Foundation of Shandong Province, China;Project(NCET-04-0622) supported by the Program for New Century Excellent Talents in University, China.

摘　　要：The suitable test equipment for wire-drawing was designed. Wire-drawing tests were carried on with this equipment for TiC/Al2O3 ceramic wire-drawing die. Effect of lubrication medium and drawing velocity on the drawing force was investigated. The wear mechanisms of the ceramic drawing dies were investigated. Worn bore surfaces of the ceramic drawing dies were examined by scanning electron microscopy. The results show that lubricant media have great influence on the drawing force. The drawing force is the smallest when a grease lubricant is used. But alteration of drawing velocity has scarcely any influence on the drawing force. Detailed observations and analyses of the die wear surface reveal that the most common failure of the ceramic drawing die is the wear in the invariable zone and bearing zone owing to the greater press stresses. Abrasive and adhesive wear are found to be the predominant wear mechanisms for ceramic drawing die.The suitable test equipment for wire-drawing was designed. Wire-drawing tests were carried on with this equipment for TiC/Al2O3 ceramic wire-drawing die. Effect of lubrication medium and drawing velocity on the drawing force was investigated. The wear mechanisms of the ceramic drawing dies were investigated. Worn bore surfaces of the ceramic drawing dies were examined by scanning electron microscopy. The results show that lubricant media have great influence on the drawing force. The drawing force is the smallest when a grease lubricant is used. But alteration of drawing velocity has scarcely any influence on the drawing force. Detailed observations and analyses of the die wear surface reveal that the most common failure of the ceramic drawing die is the wear in the invariable zone and bearing zone owing to the greater press stresses. Abrasive and adhesive wear are found to be the predominant wear mechanisms for ceramic drawing die.

关 键 词：碳化钛/三氧化二铝陶瓷 回火处理 磨损行为 润滑介质 拔丝 

分 类 号：TB302[一般工业技术—材料科学与工程]