ECAE法制备的铝青铜合金显微组织及摩擦学性能.pdfVIP

学兔兔 第14卷第6期 粉末冶金材料科学与工程 2009年12月 Vb1．14 NO．6 Materials Science and Engineering of Powder Metallurgy Dec．2009 ECAE法制备的铝青铜合金显微组织及摩擦学性能 高雷雷 ，程先华 ，张金中 (1．中国石油大学 机电 [程学院，东营 257061；2．上海交通大学 机械与动力 程学院，上海 200030) 摘 要：对两相铝青铜合金(Cu一10％A1—4％Fe)~L行等通道转角挤)~(Equal channel angular extrusion， 简称ECAE) 热加工处 ，研究ECAE对合金微观组织及摩擦学性能的影响。结果表明，ECAE热挤压可显著细化铝青铜合金晶 粒，并显著提高该合金的摩擦学性能。未经ECAE挤压处理的铝青铜合金表面具有严重的磨粒磨损特征，而经4道 次挤 处理后其表面只呈现轻微的磨粒磨损特征。铝青铜合金的摩擦因数及磨损量均随挤压道次增加而减小，这 是由于晶粒细化提高了它的硬度和强度，也闪此提高其抗塑性变形能力，从而减少磨损过程中的塑性变形，提高 其耐磨性能；另外，铝青铜合金抗塑性变形能力增加，减少了磨粒对其表面的犁削作用，也提高了该合金的磨损 性能。 关键词：等通道转角挤爪；锚青铜；摩擦；磨损 中图分类号：TH1 17．1 文献标识码：A 文章编号：1673—0224(2009)6．391—05 Microstructure and tribological properties of Cu·-10％Al—-4％Fe alloy prepared by equal channel angular extrusion GAO Lei—lei ，CHENG Xian—hua ，ZHANG Jin—zhong (1．School of MechanicalElectronic Engineering，China University of Petroleum，Dongying 25706 1，China 2．School ofMechanical Engineering，Shanghai Jiaotong University,Shanghai 200030，China) Abstract：Aluminum bronze alloy(Cu一1 0％AI一4％Fe)has been fabricated by equal chanel angular extrusion(ECAE) process．The effect of ECAE condition on microstructure and tribology properties of the alloy has been investigated． Experimental results show that the grains of the alloy can be refined remarkably and the tribology properties of the alloy also improve remarkably after ECAE process．Obviously wear~aces have been found on the surface of Cu一1 0％A1—4％Fe alloy which has not been treated by ECAE process and slight wear trace can be found on the surface of