摘要
研究了加有莱武氏相强化的铁基抗磨合金细粉末、纳米级丁腈橡胶粉、纳米级Al2O3和BN、促进剂DPTT和DMTD等组分的无石棉刹车片材料，试样通过了XD—MSM机定速试验和Chase机试验。结果表明：定速试验的磨损率较低，摩擦稳度‰在0．84以上；Chase试验表明，300℃的高温摩擦系数达0．428～0．497，热衰退很小，其摩擦稳度αst更强，多数在0．92以上，甚至于达到0．998；用此材料制成的产品试运行情况良好。文章分析了添加的合金粉末和纳米级丁腈橡胶粉的作用机理，指出了合金莱武氏相金属互化物的原子键合和特殊的晶体结构对高的高温摩擦系数和稳度αst、低的热衰退和粘着磨损所起的关键作用；纳米级丁腈橡胶粉韧化基体，与其它添加剂优化组合，对减少磨损、提高稳度αst、防止噪音起重要作用。
A new type of brake material added Fe base wear resistant alloy powder strengthened by Laves phase, rubber-carboxylic nitrile-butadiene nanopowder, Al2O3 and BN nanopowder, accelerator DPTT, DMTD etc without asbestos has been investigated. Specimens were tested by constant speed XD- MSM machine and Chase machine. The results show that the new material has higher friction coefficient at high temperature, very low thermo-decline, less abrasion, especially excellent friction stability αst. The pad brake of new material has run well. The active mechanism of Laves phase and rubber-carboxylic nitrile-butadiene nanopowolet have been analysed. It indicates that the special bond and crystalline structure of the alloys contribute to friction stability αst, higher hardness, low abrasion, low adhesive wear and that the nano-scale rubber possesses ability to cooperate with orther additives to toughen the base of composite,to improve wear rate ,noise and αst.
出处
《粉末冶金技术》
CAS
CSCD
北大核心
2009年第1期20-23,共4页
Powder Metallurgy Technology
关键词
摩擦学特性
莱武氏相强化铁基抗磨合金
多组分复合材料
tribological characteristics, Fe base wear resistant alloys strengthened by Laves phase, composite with multi-components
