C_2Cl_6、Ba复合处理对AZ91镁合金组织和力学性能的影响  

Influence of C_2Cl_6 and Ba Compound Treatment on Structure and Mechanical Properties of AZ91 Alloy

作　　者：王学亮[1] 耿浩然[1] 王致明[1] 滕新营[1] 张蕾[1] 

机构地区：[1]济南大学材料科学与工程学院,山东济南250022

出　　处：《热加工工艺》2009年第1期16-18,22,共4页Hot Working Technology

基　　金：山东省自然科学基金(Y2006F55);山东省中青年科学家奖励基金(2005bs04012)

摘　　要：研究了C2Cl6、Ba复合处理对铸造AZ91镁合金组织和性能的影响。C2Cl6高温分解生成C,而C与Al反应生成Al4C3,起到异质形核的作用,细化合金晶粒;Ba聚集在固液相界面之间,阻碍晶粒长大以细化晶粒。试验结果表明,AZ91镁合金经过Ba和C2Cl6复合处理后组织得到明显细化,平均晶粒减小到30μm,与未处理过的合金晶粒(94μm)相比,减小了68.1%;合金的综合力学性能得到了提高,抗拉强度提高了25.6%,伸长率提高了10.3%。The structures and mechanical properties of casting AZ91 magnesium alloy refined by C2Cl6 and Ba compound treatment were studied. C is the reactant of C2Cl6 decomposition at high temperature,and due to C reacting with Al,the reactant Al4C3 contributed to heterogeneous nucleation and refinement of alloy grain;Ba congregated at solid-fluid interfaces so as to prevent grains from growing up and refine grains. The results show that after adding C2Cl6 and Ba,the microstructure of AZ91 magnesium alloy refines evi...

关 键 词：C_2Cl_6 BA 复合处理 镁合金 细化 

分 类 号：TG146.22[一般工业技术—材料科学与工程]