均匀化退火对铸造高铝青铜的影响  

Effect of Homogenizing Annealing on AS-Cast Aluminum Bronze

作　　者：徐建林[1] 路阳[1] 刘明朗[2] 李海兰[3] 李文生[1] 王智平[1] 朱小武[1] 

机构地区：[1]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 [2]宝钢集团常州冶金机械厂,常州213000 [3]沈阳铸造研究所新技术研究中心,沈阳1110000

出　　处：《航空材料学报》2006年第5期26-30,共5页Journal of Aeronautical Materials

基　　金：甘肃省自然科学基金项目(ZS032-B25-029);教育部"春晖计划"资助项目(Z2004-1-62010)

摘　　要：利用扫描电镜、X射线衍射仪、能谱仪等分析设备对一种新型高强度、高耐磨铸造高铝青铜在不同温度与时间均匀化处理后的显微组织和力学性能进行了研究分析。研究结果表明,铸造高铝青铜经均匀化退火可消除铸造偏析,提高机械性能。在均匀化退火过程中,偏析原子通过固溶和形成强化相来改善铸造合金的显微组织,当组织为在β相上弥散分布着均匀、细小、圆整的κ相时,合金具有较好的力学性能;试验铸造高铝青铜的显微组织和力学性能随均匀化退火温度和时间发生变化,通过对比试验,确定出最佳的均匀化退火工艺为950℃/9h。Microstructure and mechanical properties of a new high strength and wear-resistant as-cast aluminum bronze with different homogenizing annealing are investigated by means of SEM, XRD and X-ray spectrometer. The results show that the as-cast aluminum bronze can be eliminated casting segregation and improved mechanical properties. In homogenizing annealing, segregation atom can dissolve into matrix structure or form strengthening phase. Therefore, segregation microstructure is improved. If sphericity strengthening phase distributes equally on β matrix structure, the experiment alloy has good mechanical properties. Microstructure and mechanical properties of the experiment alloy primarily depend on homogenizing annealing temperature and time. According to contrast experiment, the best homogenizing annealing process is 950℃C and 9 hours.

关 键 词：铝青铜 均匀化退火 显微组织 力学性能 

分 类 号：TG146.11[一般工业技术—材料科学与工程] TG156[金属学及工艺—金属材料]