(1. 江蘇科技大學(xué) 先進(jìn)焊接技術(shù)省級重點(diǎn)實驗室，鎮(zhèn)江 212003；
2. Advanced Materials Division, Korea Institute of Machinery and Materials, Changwon 641-010, Korea)
摘 要:
研究分析熱處理工藝對A356/SiCp復(fù)合材料的硬度、導(dǎo)電率及微觀組織的影響，在此基礎(chǔ)上研究復(fù)合材料的干滑動摩擦磨損特性。結(jié)果表明：固溶和T6熱處理可顯著提高復(fù)合材料的硬度，但降低導(dǎo)電率，而低溫退火卻比較顯著地提高導(dǎo)電率；導(dǎo)電率高的低溫退火態(tài)磨損特性基本與鑄態(tài)一致，固溶處理及時效處理雖可有效提高硬度，但不提高耐磨性能，這表明T6熱處理是否作為制動盤材料時的最佳熱處理工藝，有待進(jìn)一步研究；復(fù)合材料的磨損率隨載荷的增加而增加，但低載荷時增加緩慢，高載荷時增加迅速；摩擦因數(shù)隨著熱處理工藝而變化，但對載荷變化不敏感，都在較小的范圍內(nèi)波動，基本是穩(wěn)定的。
關(guān)鍵字: Al/SiCp；復(fù)合材料；干摩擦；熱處理；摩擦磨損特性
（1.Provincial Key Laboratory of Advanced Welding Technology, Jiangsu University of Science and Technology; Zhenjiang 212003, China;
2. Advanced Materials Division, Korea Institute of Machinery and Materials, Changwon 641-010, Korea）
Abstract:The effects of different heat treatments on hardness, electric conductivity and microstructure of A356/SiCp composite were investigated. In addition, the dry sliding frictional wear characteristics were also studied. The composite’s hardness increases markedly after solid solution and T6 treatment while the conductivity reduces, and the conductivity increases markedly after the low temperature annealing. The wear experiment results show that the wear characteristic of casting composite is in good agreement with the low temperature annealing composite. The hardness increases effectively after solid solution and aging treatment while the wear resistant performance reduces. The wear rate of A356/SiCp composite increases with the increase of the applied load, under the lower load, and the wear rate increases slowly with load increasing, while under the higher load the wear rate increases quickly; the friction coefficient varies with heat treatment process and has no sensitivity to load, which varies in little range and appears stability.
Key words: Al/SiCp; composite; dry friction; heat treatment; friction and wear characteristic
