MnCO_(3)对含铝铸造镁合金晶粒尺寸的影响  

Effect of MnCO_(3) on Grain Size of Aluminum-Containing Cast Mg Alloys

作　　者：王岭 刘杨 赵一权 谢宇 WANG Ling;LIU Yang;ZHAO Yiquan;XIE Yu(Liaoning Key Laboratory of Chemical Additive Synthesis and Separation,Yingkou Institute of Technology,Yingkou 115014,China;College of Chemistry and Materials Engineering,Hainan Vocational University of Science and Technology,Haikou 571126,China;CATARC Automotive Test Center(Tianjin)Co.,Ltd.,Tianjin 300399,China)

机构地区：[1]营口理工学院辽宁省化学助剂合成与分离重点实验室,辽宁营口115014 [2]海南科技职业大学化学与材料工程学院,海南海口571126 [3]中汽研汽车检验中心(天津)有限公司,天津300300

出　　处：《热加工工艺》2024年第9期108-110,116,共4页Hot Working Technology

基　　金：国家自然科学基金项目(51271046);辽宁省自然科学基金区域联合基金项目(2020-YKLH-26,2021-YKLH-19);辽宁省自然科学基金指导计划项目(20180550724);辽宁省化学助剂合成与分离重点实验室内部课题(ZJNK2109);全国大学生创新创业计划项目(201914435050);营口市博士双创计划项目(QB-2019-10);营口理工学院高层次人才引进项目(RC201902)。

摘　　要：研究了MnCO_(3)对Mg-3wt%Al、Mg-9wt%Al镁合金晶粒的影响。采用金相显微镜对添加MnCO_(3)含铝铸造镁合金进行了显微组织分析。结果表明:铸造Mg-3wt%Al和Mg-9wt%Al的平均晶粒尺寸为365μm和340μm,Mg-3wt%Al和Mg-9wt%Al合金晶粒度随着MnCO_(3)添加量增加而减小,添加质量分数为1wt%的MnCO_(3)后晶粒尺寸分别减少到90μm和55μm。理论分析表明:合金熔体中形成MgO、Al_(4)C_(3)和Al_(8)Mn_(5)是理想的异质形核质点,由于形核质点的增加,晶粒尺寸明显减小。The effects of MnCO_(3)on grain of Mg-3wtAl and Mg-9wt%Al magnesium alloys were studied.The microstructure of as-cast Mg-Al alloys with MnCO_(3)was analyzed by metallographic microscope.The results show that the average grain size of Mg-3wt%Al and Mg-9wt%Al alloys is 365μm and 340μm,respectively and the average grain size of Mg-3wt%Al and Mg-9wt%Al alloys decreases with increasing MnCO_(3)addition.After the addition of 1wt%MnCO_(3),the grain size is reduced to 90μm and 55μm,respectively.Theoretical analysis show that MgO,Al_(4)C_(3) and Al_(8)Mn_(5) particles are considered as heterogeneous nucleation particles and the grain size decreases obviously due to the increase of nucleation particles.

关 键 词：镁合金 晶粒细化 MnCO_(3) 

分 类 号：TG292[金属学及工艺—铸造] TG243