氧化铝颗粒耐热钢基复合材料的高温磨损特性

Properties of Alumina Particle/Heat Resistant Steel Composites under High Temperature Abrasive Wear

采用化学气相沉积技术对氧化铝颗粒表面进行涂层处理,通过负压铸渗工艺制备了氧化铝颗粒耐热钢基复合材料,并对其在900℃下的高温磨料磨损特性进行了研究,结果表明:耐热钢在高温下的磨损主要是由磨料的滚压形成的挤出唇、翻边脱落所引起,磨损量较大,而复合材料高温磨损时颗粒突出于基体,承受载荷多,阻碍了磨粒对基体的损伤,因而抗磨性较好,其高温耐磨性是基体材料的33倍多.

Chemical vapor deposition is used for coating the surface of alumina particle, and alumina particle/heat resistant steel composites are manufactured by the vacuum infiltration technique. Their properties are studied for temperature under 900℃ and showed that the wear mechanism of heat resistant steel under high temperature is chiefly a process of extruding lip and turn up edge due to roll press abrasion. During the action of wear, the particles protrude out the matrix such that abrasive wear of matrix is decreased. Comparing with the heat resistant steel, the wear resistance is 3.3 times beyond that of the matrix material.