作　　者： ; ; ; ;

机构地区： 中南大学材料科学与工程学院材料学系

出　　处： 《材料科学与工艺》 2001年第4期363-366,共4页

摘　　要： 为了探讨微量Zr、Ti对热锻态QAl10 -4 -4 合金“缓冷脆性”的影响 ,熔铸了Cu10Al4Fe4Ni0 .3Zr和Cu10Al4Fe4Ni0 .3Ti两种合金 ,测定了合金锻态及不同退火状态下的拉伸力学性能 ,并用光学显微镜进行了金相组织的观察和分析 .结果表明 :Zr能明显改善合金的“缓冷脆性” ,提高合金的塑性 ,在“缓冷脆性”温度下的延伸率高于 8% ,可满足高速列车异步牵引电动机护环材料要求的力学性能 ;而Ti的添加对“缓冷脆性”的影响不明显 .该类合金在 6 0 0℃温度附近保温 。 In order to study the effect of trace elements Zr?Ti on the slow cooling brittleness of hot forged QAl 10-4-4 alloy, two alloys of Cu10Al4Fe4Ni0.3Zr and Cu10Al4Fe4Ni0.3Ti are founded. The mechanical properties of the samples are performed along drawing direction of forging in forged and variously annealed states and the microstructure of the samples was examined by optical microscopy. The results show that the slow cooling brittleness of the alloy due to the precipitation of γ 2 and its coarsening was improved with the addition of 0.3% Zr, with the increase of elongation up to 8%. The element Ti has less effect on this kind of brittleness. The elongation of the alloys displayed maximum values after annealing at 600 ℃ due to the utmost α phase transformation.

关 键 词： 铝青铜 缓冷脆性 锆 钛 列车 异步牵引电动机 护环材料 力学性能

领　　域： [机械工程] [交通运输工程] [交通运输工程] [金属学及工艺] [一般工业技术] [金属学及工艺]