微量混合RE对Al-Si多元活塞合金的高温强化及组织分析  

High-Temperature Strengthening Effect of Trace RE on Industrial Al-Si Piston Alloy and Its Microstructural Analysis

作　　者：钱钊[1] 刘相法[1] 冯增建 赵德刚[1] 边秀房[1] 

机构地区：[1]山东大学材料液态结构及其遗传性教育部重点实验室,山东济南250061 [2]山东滨州渤海活塞股份有限公司,山东滨州256602

出　　处：《铸造》2007年第2期141-144,共4页Foundry

基　　金：教育部科学技术研究重点项目(106103);山东省自然科学基金资助项目(Z2004F03)。

摘　　要：作为以低成本提高现役活塞合金高温性能的初步探索,利用材料高温试验机、扫描电镜、电子探针等手段研究了加入微量混合RE对ZL109活塞合金高温强度和显微组织的影响。试验结果表明,微量混合RE对ZL109合金可起到微合金化作用,提高其高温强度。加入微量富铈混合RE,合金中AlNiCu耐热相数目增多,使合金耐热性提高。此外,微量富铈混合RE可在ZL109合金中形成一种呈颗粒状的Al-Ce-La-Ni-Cu-Si稀土化合物,为合金进一步强化开辟了新思路。The effect of trace addition of RE on high-temperature strength and microstructure of ZL109 piston alloy was investigated by means of Tensile Testing, SEM, EPMA, etc., aiming at improving the high-temperature property of current piston alloy at lower cost. The results show that trace RE can increase the high-temperature ultimate tensile strength （UTS） of ZL109 piston alloy, acting as trace-alloying elements. The number of AINiCu intermetallic phase in ZL109 alloy increased after trace addition of RE, which helps to the increase of high-temperature UTS. It has also been shown that a kind of granule-shape AI-Ce-La-Ni-Cu-Si RE-rich compound forms in alloy, which provides a neW idea to further strengthen ZL109 alloy.

关 键 词：AL-SI活塞合金 稀土 高温强度 组织 

分 类 号：TG115[金属学及工艺—物理冶金]