稀土元素钐添加对镁合金轧制边裂影响的研究
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摘要
针对镁合金板坯轧制过程中出现的边裂问题,结合稀土元素改善合金组织的特性。镁合金中先添加不同量的Sm(钐元素),然后进行铸造挤压制成坯料,再分别进行冷轧和温轧实验,分析轧后镁合金板坯组织和力学性能。研究表明:温轧和冷轧条件下,添加稀土元素Sm后镁合金板坯轧制边裂问题得到了较好的改善;随着稀土元素Sm添加量的增大,镁合金板坯的屈服强度增大,延伸率减小。
The edge cracks of Mg alloy sheet occur frequently during rolling.On the basis of the ability of lanthanon to improve alloy's structure,different amount of Sm was added in the magnesium alloy.Then the alloy was cast and extruded into composite.The microstructure and mechanical properties of the rolled magnesium alloy slab were analyzed after cold rolling and warm rolling separately.Research shows that:During the cold and worm rolling,the edge crack of magnesium alloy slab was overcome with the addition of Sm.With the increase in the addition of Sm,the yield strength and elongation of magnesium alloy slab decreased,while its elongation decreased.
The edge cracks of Mg alloy sheet occur frequently during rolling.On the basis of the ability of lanthanon to improve alloy's structure,different amount of Sm was added in the magnesium alloy.Then the alloy was cast and extruded into composite.The microstructure and mechanical properties of the rolled magnesium alloy slab were analyzed after cold rolling and warm rolling separately.Research shows that:During the cold and worm rolling,the edge crack of magnesium alloy slab was overcome with the addition of Sm.With the increase in the addition of Sm,the yield strength and elongation of magnesium alloy slab decreased,while its elongation decreased.
引文
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[23]黄志权,黄庆学,马立峰,等.宽幅AZ31B镁合金铸轧板显微组织和性能研究[J].材料研究学报,2013,27(3):292-298.HUANG Z Q,HUANG Q X,MA L F,et al.Study on microstructure and properties of the broadloom AZ31Bmagnesium alloy roll-casting plate[J].Chinese Journal of Materials Research,2013,27(3):292-298.
[24]张丁非,徐杏杏,兰伟,等.AZ31镁合金轧制工艺的研究[J].材料工程,2011(11):68-73.ZHANG D F,XU X X,LAN W,et al.Study on AZ31magnesium alloy rolled process[J].Journal of Materials Engineering,2011(11):68-73.
[25]TANG W,HUANG S,LI D,et al.Mechanical anisotropy and deep drawing behaviors of AZ31magnesium alloy sheets produced by unidirectional and cross rolling[J].Journal of Materials Processing Tech,2015,215:320-326.
[2]WU D,CHEN R S,HAN E H.Excellent room-temperature ductility and formability of rolled Mg-Gd-Zn alloy sheets[J].Journal of Alloys&Compounds,2011,509(6):2856-2863.
[3]陈振华.变形镁合金(精)[M].北京:化学工业出版社,2005.CHEN Zhenhua.Wrought magnesium alloy[M].Beijing:Chemical Industry Press,2005.
[4]康志新,彭勇辉,孔晶,等.等通道转角挤压变形Mg-1.5Mn-0.3Ce镁合金的组织、织构与力学性能[J].稀有金属材料与工程,2012,41(2):215-220.KANG Z X,PENG Y H,KONG J,et al.Microstructure,texture and mechanical properties of Mg-1.5Mn-0.3Ce magnesium alloy deformed by equal channel angular pressing[J].Rare Metal Materials and Engineering,2012,41(2):215-220.
[5]张小平,秦建平.轧制理论[M].北京:冶金工业出版社,2006:179.ZHANG X P,QIN J P.Rolling theory[M].Beijing:Metallurgical Industry Press,2006:179.
[6]ZOU D L,LUAN B F,LIU Q.Microstructural evolution of zirconium alloy under dynamic compression at strain rate of 1 000s-1[J].Transactions of Nonferrous Metals Society of China,2012,22(10):2402-2408.
[7]马立峰,贾伟涛,林金保,等.铸态AZ31B镁合金变温轧制本构数学模型的建立[J].稀有金属材料与工程,2016(2):339-345.MA L F,JIA W T,LIN J B,et al.Establishment of a constitutive model of temperature-changed rolling process for as-cast AZ31Bmagnesium alloy[J].Rare Metal Materials and Engineering,2016(2):339-345.
[8]马立峰,徐海洁,贾伟涛,等.AZ31B镁合金热轧后组织性能预测模型的建立[J].材料热处理学报,2015,36(9):244-251.MA L F,XU H J,JIA W T,et al.Prediction of microstructure and mechanical properties of hot-rolled AZ31Bmagnesium alloy[J].Transactions of Materials and Heat Treatment,2015,36(9):244-251.
[9]李杰华,介万奇,杨光昱.稀土Gd对Mg-Nd-Zn-Zr镁合金组织和性能的影响[J].稀有金属材料与工程,2008,37(10):1751-1755.LI J H,JIE W Q,YANG G Y.Effect of gadolinium on the microstructure and mechanical properties of Mg-Nd-Zn-Zr cast magnesium alloys[J].Rare Metal Materials and Engineering,2008,37(10):1751-1755.
[10]蔡康乐,高志刚,朱乾科,等.挤压Mg-(8,11)Al-Mn-Y-Gd-La合金的显微组织和力学性能[J].稀有金属材料与工程,2015(6):1489-1493.CAI K L,GAO Z G,ZHU Q K,et al.Microstructure and mechanical properties of extruded Mg-(8,11)Al-Mn-Y-Gd-La alloys[J].Rare Metal Materials and Engineering,2015(6):1489-1493.
[11]CCERES C H,DAVIDSON C J,GRIFFITHS J R,et al.Effects of solidification rate and ageing on the microstructure and mechanical properties of AZ91alloy[J].Materials Science&Engineering A,2002,325(s1/2):344-355.
[12]胡耀波,杨生伟,姚青山,等.挤压比及不同Mn含量对Mg-10Gd-6Y-1.6Zn-xMn镁合金组织性能的影响[J].稀有金属材料与工程,2017,46(1):135-142.HU Y B,YANG S W,YAO Q S,et al.Effects of extrusion ratio and Mn contents on microstructure and properties of Mg-10Gd-6Y-1.6Zn-xMn magnesium alloy[J].Rare Metal Materials and Engineering,2017,46(1):135-142.
[13]李全安,陈晓亚,刘文健,等.复合添加Sm与Nd对AZ81镁合金组织和性能的影响[J].稀土,2015(2):36-41.LI Q A,CHEN X Y,LIU W J,et al.Effects of Sm and Nd on microstructure and properties of AZ81magnesium alloy[J].Chinese Rare Earths,2015(2):36-41.
[14]常海.累积叠轧纯Mg及Mg/Al多层复合板材的组织结构与力学性能[D].哈尔滨:哈尔滨工业大学,2011.CHANG Hai.Microstructure evolution and mechanical properties of pure Mg and Mg/Al laminated composites fabricated by accumulative roll bonding[D].Harbin:Harbin Insitute of Technology,2011.
[15]颜亮.AZ31镁合金板材轧制过程的有限元模拟与工艺研究[D].长沙:湖南大学,2010.YAN L.Finite element simulation and technics research during the rolling process of AZ31magnesium alloy sheet[D].Changsha:Hunan University,2010.
[16]李亚江.异质先进材料连接理论与技术[M].北京:国防工业出版社,2013.LI Y J.Theories and technique on joining of dissmislar advanced materials[M].Beijing:National Defense Industry Press,2013.
[17]潘复生,韩恩厚.高性能变形镁合金及加工技术[M].北京:科学出版社,2007.PAN F S,HAN E H.High performance wrought magnesium alloy and processing technology[M].Beijing:Science Press,2007.
[18]杨文朋,郭学锋,任昉,等.往复挤压镁合金再结晶组织表征[J].中国有色金属学报,2013(10):2730-2737.YANG W P,GUO X F,REN F,et al.Characterization of recrystallized microstructure of reciprocating extruded magnesium alloy[J].The Chinese Journal of Nonferrous Metals,2013(10):2730-2737.
[19]杨海波,胡水平.轧制参数对AZ31镁合金织构和室温成形性能的影响[J].中国有色金属学报,2014(8):1953-1959.YANG H B,HU S P.Influence of rolling parameters on texture and formability of rolled AZ31magnesium alloys at room temperature[J].The Chinese Journal of Nonferrous Metals,2014,24(8):1953-1959.
[20]SABOKPA O,ZAREI-HANZAKI A,ABEDI H R,et al.Artificial neural network modeling to predict the high temperature flow behavior of an AZ81magnesium alloy[J].Materials&Design,2012,39:390-396.
[21]毛萍莉,刘正,王长义,等.高应变速率下AZ31镁合金的各向异性及拉压不对称性[J].中国有色金属学报,2012,22(5):1262-1269.MAO P L,LIU Z,WANG C Y,et al.Anisotropy and asymmetry of as-extruded AZ31magnesium alloy deformed under high strain rate[J].The Chinese Journal of Nonferrous Metals,2012,22(5):1262-1269.
[22]王忠堂,宋广胜,张士宏,等.异步轧制AZ31镁合金板材的孪晶组织及织构[J].材料热处理学报,2013,34(10):62-66.WANG Z T,SONG G S,ZHANG S H,et al.Twins and texture of AZ31magnesium alloy sheet by asynchronous rolling[J].Transactions of Materials and Heat Treatment,2013,34(10):62-66.
[23]黄志权,黄庆学,马立峰,等.宽幅AZ31B镁合金铸轧板显微组织和性能研究[J].材料研究学报,2013,27(3):292-298.HUANG Z Q,HUANG Q X,MA L F,et al.Study on microstructure and properties of the broadloom AZ31Bmagnesium alloy roll-casting plate[J].Chinese Journal of Materials Research,2013,27(3):292-298.
[24]张丁非,徐杏杏,兰伟,等.AZ31镁合金轧制工艺的研究[J].材料工程,2011(11):68-73.ZHANG D F,XU X X,LAN W,et al.Study on AZ31magnesium alloy rolled process[J].Journal of Materials Engineering,2011(11):68-73.
[25]TANG W,HUANG S,LI D,et al.Mechanical anisotropy and deep drawing behaviors of AZ31magnesium alloy sheets produced by unidirectional and cross rolling[J].Journal of Materials Processing Tech,2015,215:320-326.