添加Al-Ti-B对Mg-15Al-0.8Zn镁合金组织和力学性能的影响  

Effect of Al-Ti-B Master Alloy on Microstructure and Mechanics Properties of Mg-15Al-0.8Zn Magnesium Alloy

作　　者：张威[1] 阎峰云[1] 李波 马孝斌[1] 陈基东[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,兰州730050 [2]内蒙古第一机械制造(集团)有限公司,包头市014032

出　　处：《中国铸造装备与技术》2009年第6期17-19,共3页China Foundry Machinery & Technology

摘　　要：采用添加Al-Ti-B来改善Mg-15Al-0.8Zn镁合金的铸态组织及力学性能。结果表明:添加0.4%Al-Ti-B对Mg-15Al-0.8Zn镁合金铸态组织的细化效果最好,平均晶粒尺寸由原来的200μm减小到80μm左右,且接近平均尺寸的晶粒数目所占比例明显增加;随着晶粒尺寸的减小,合金的抗拉强度和伸长率都明显提高,抗拉强度由原来的130MPa提高到180MPa,伸长率由原来的1.3%提高到3.5%。As-cast microstructure and mechanics properties of Mg-15Al-0.8Zn alloy were improved by Al-Ti-B.The results showed that the best refinement of as-cast alloy microstructure obtained with addition of 0.4%Al-Ti-B.The average grain size decreased from 200 μm to 80 μm or so,and the number of grains near the average size have marked increasing.With the decrease of grain size,both the tensile strength and the elongation have been improved with tensile strength from 130 MPa to 180 MPa and elongation from 1.3% to 3.5%.

关 键 词：镁合金 晶粒细化 力学性能 

分 类 号：TG146.22[一般工业技术—材料科学与工程]