轧制路径对Mg-Al-Ca-Mn-Zn镁合金成形性及组织性能的影响  

Effect of rolling routes on formability,microstructure and mechanical properties of Mg-Al-Ca-Mn-Zn magnesium alloy

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作  者:方德俊 孙有平[1,2,3] 何江美 罗国建[1,2] 罗章 Frang jun;un Youping;He jangmei;Luo Cuojan;Luo hang(School of Mechanical and Automotive Engineering,Guangxi University of Science and Technology,Liuzhou Guangxi 545006,China;Guangxi Earthmoving Machinery Collaborative Innovation Center,Liuzhou Guangxi 545006,China;Guangxi Key Laboratory of Automobile Components and Vehicle Technology,Liuzhou Guangxi 545006,China)

机构地区:[1]广西科技大学机械与汽车工程学院,广西柳州545006 [2]广西土方机械协同创新中心,广西柳州545006 [3]广西汽车零部件与整车技术重点实验室,广西柳州545006

出  处:《金属热处理》2023年第11期137-142,共6页Heat Treatment of Metals

基  金:中央引导地方科技发展专项(桂科ZY21195053);柳州市科技计划(2021CBA0102);广西高等学校高水平创新团队项目(桂教师范[2019]52号)。

摘  要:采用金相显微镜、X射线衍射仪、拉伸试验机和扫描电镜等,研究了4种不同轧制路径对Mg-1.2Al-0.4Ca-0.3Mn-0.3Zn镁合金板材成形性、微观组织和力学性能的影响。结果表明,轧制路径对Mg-1.2Al-0.4Ca-0.3Mn-0.3Zn镁合金板材的成形性、显微组织和力学性能都有影响,通过RD+TD多道交叉轧制得到的板材成形性最佳,无边裂产生;相较于单向多道次轧制,板材经多道次交叉轧制后晶粒细化明显,组织趋于均匀,基面织构强度也从9.680降至6.111,并且板材各向异性有显著弱化,塑性得到提升,沿轧制方向伸长率为19%。Effect of four different rolling routes on formability,microstructure and mechanical properties of the Mg-1.2Al-0.4Ca-0.3Mn-0.3Zn magnesium alloy sheet was investigated by means of metallographic microscopy,X-ray diffractometer,tensile testing machine and scanning electron microscope.The results show that the rolling route has an effect on the formability,microstructure and mechanical properties of the Mg-1.2Al-0.4Ca-0.3Mn-0.3Zn magnesium alloy sheet,and the sheet obtained by RD+TD multi-pass cross-rolling has the best formability and no edge crack.Compared with that of the unidirectional multi-pass rolling,the sheet obtains obvious grain refinement and uniform microstructure after multi-pass cross-rolling,the basal texture intensity is reduced from 9.680 to 6.111,the anisotropy is significantly weakened and the plasticity is improved,with the elongation along rolling direction of 19%.

关 键 词:镁合金 轧制路径 成形性 显微组织 力学性能 

分 类 号:TG146.22[一般工业技术—材料科学与工程]

 

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