Mg-6Al-5Sn-0.3Ce镁合金的离心铸造工艺优化  

Optimization of Centrifugal Casting Process of Mg-6Al-5Sn-0.3Ce Magnesium Alloy

作　　者：宋东方[1] 李忠利 SONG Dongfang;LI Zhongli(Henan Polytechnic,Zhengzhou 450046,China;College of Vehicle and Transportation Engineering,Henan University of Science and Technology,Luoyang 471003,China)

机构地区：[1]河南职业技术学院,河南郑州450046 [2]河南科技大学车辆与交通工程学院,河南洛阳471003

出　　处：《热加工工艺》2021年第9期77-80,共4页Hot Working Technology

基　　金：国家科技部专项资助项目(2016YFD070100-2)。

摘　　要：采用不同的离心铸造工艺参数对Mg-6Al-5Sn-0.3Ce镁合金进行了铸造,研究了旋转速度和离心力保持时间对合金显微组织和腐蚀性能的影响。结果表明:随旋转速度和离心力保持时间的增加,样品的平均晶粒尺寸先减小后增大,腐蚀电位先正移后负移,耐腐蚀性能先提升后下降。在1700 r/min旋转速度下保持时间5 min,合金的平均晶粒尺寸最小,腐蚀电位最正。Mg-6Al-5Sn-0.3Ce镁合金的离心铸造工艺参数优选为:1700 r/min旋转速度、5min离心力保持时间。在这个条件下,合金的平均晶粒尺寸为23μm,腐蚀电位为-0.891 V。The Mg-6Al-5Sn-0.3Ce magnesium alloy was cast by using different centrifugal casting process parameters.The effects of rotating speed and centrifugal force holding time on the microstructure and corrosion properties of the alloy were studied.The results show that with the increase of rotating speed and centrifugal force holding time,the average grain size of the samples decreases first and then increases,the corrosion potential moves first positively and then negatively,and the corrosion resistance increases first and then decreases.The average grain size of the alloy is the smallest and the corrosion potential is the most positive at the rotation speed of 1700 r/min for 5 min.The optimum centrifugal casting parameters of Mg-6Al-5Sn-0.3Ce magnesium alloy are rotation speed of 1700 r/min and centrifugal force retention time of 5 min.Under these conditions,the average grain size of the alloy is 23μm and the corrosion potential is-0.891 V.

关 键 词：Mg-6Al-5Sn-0.3Ce镁合金 离心铸造 显微组织 腐蚀性能 

分 类 号：TG249.4[金属学及工艺—铸造] TG146.22[一般工业技术—材料科学与工程]