稀土硅铁孕育对高铬合金白口铸铁性能的影响  

Effects of RE on Mechanical Properties of CuZnAl Shape Memory Alloys

作　　者：姜镇崧[1] 贾文亮[1] 张学光[1] 

机构地区：[1]天津大学机制系

出　　处：《稀土》1997年第1期33-36,40,共5页Chinese Rare Earths

摘　　要：本文对稀土硅铁、钒铁、钛铁的不同加入量对高铬合金白口铸铁性能的影响进行了实验研究。结果表明，当稀土硅铁的加入量为１．２～１．５％时，冲击韧性达到最大值，硬度也有提高。稀土硅铁孕育可以显著改善碳化物的形态和分布，细化基体组织。当加入量为０．９～１．５％时，大部分碳化物断网，呈孤立状态分布。钒铁的加入量为０．２％时，即可起到明显的孕育作用，机械性能得到提高。A comparative tensile test was made by means of the electronic tensile tester in the specimens of CuZnAl alloys with trace Y and Nd and without RE. The results show that the trace RE elements obviously improve the tensile strength and extension of the alloys , meanwhite maintain its original shape memory effect. The grain sizes were reduced a little from metallographic examination. The fracture appearances of specimens were also examined with SEM. The tough fracture and intergranular fracture was observed in the specimens with and without RE, respectively.

关 键 词：高铬铸铁 稀土硅铁 铬合金 白口铁 

分 类 号：TG143[一般工业技术—材料科学与工程]