新型高铝青铜的组织及耐磨性  

Microstructure and Wear Resistance of a Novel High Al Bronze

作　　者：刘阳[1] 路阳[2] 袁利华[2] 李曙[1] 

机构地区：[1]中国科学院金属研究所金属腐蚀与防护国家重点实验室,辽宁沈阳110016 [2]兰州理工大学甘肃省有色金属新材料省部共建国家重点实验室,甘肃兰州730050

出　　处：《金属热处理》2007年第4期34-37,共4页Heat Treatment of Metals

基　　金：甘肃省科技攻关项目(GS992-A52-052)

摘　　要：运用金相显微镜、X射线衍射仪、电子探针、扫描电镜及深浸蚀制样等方法对Al含量较常规铝青铜高的新型高铝青铜(Cu-14%Al-X)的组织进行了系统研究,并采用往复式磨损试验机进行了耐磨性对比试验。结果表明,新型高铝青铜是由α、β′、κ及γ2相组成,在强化相κ相中富集了大量的Co。铸后热处理可以改变高铝青铜各相的量,κ相含量将减少,基体成分均匀化程度及Fe含量将增加,显微硬度也略有提高。在干摩擦状态下,耐磨性按高铝青铜的热处理态、高铝青铜的铸态、QAl9-4依次降低。The microstructure of a novel high Al bronze （Cu-14% Al-X）was fully and carefully identified by means of metallography, X-ray diffraction （ XRD）, electron probe microanalyzer （ EPMA）, scanning electron microscope （ SEM ） and deep etching procedure. Wear behavior of the bronze was examined in reciprocating device. The results show that the high Al bronze is composed of α,β′ ,κ and γ2 phases and Co is rich in strengthening phase κ. The amount of phases are changed by heat treatment. Although the amount of κ phase is slightly diminished after heat treatment, the improvement of composition homogeneity and increment of iron content in matrix of the alloy will result in raising its microhardness which has advantage on wear resistance of the high Al bronze. Under dry friction the order of wear resistance is heat treatment high Al bronze 〉 as-casting high A1 bronze 〉 QAl9-4.

关 键 词：高铝青铜 组织 耐磨性 

分 类 号：TG113.12[金属学及工艺—物理冶金] TH117.1[金属学及工艺—金属学]