轧制温度对交叉轧制AZ31镁合金板材显微组织和力学性能的影响
Effects of Rolling Temperature on Microstructure and Mechanical Properties of AZ31 Sheets Fabricated by Cross-Rolling
摘 要
通过交叉轧制工艺制备了组织均匀的AZ31镁合金板材, 并研究了轧制温度对板材晶粒尺寸、织构和力学性能的影响。结果表明: 交叉轧制工艺可以有效细化合金组织, 提高基面织构的均匀性; 通过降低轧制温度可降低板材的平均晶粒尺寸和基面织构最大极密度, 从而有效提高板材综合力学性能; 轧制温度为250 ℃时, 板材的平均晶粒尺寸和最大极密度分别为4 μm和8.4, 此时其综合力学性能最佳, 抗拉强度、屈服强度和伸长率分别为301.0 MPa, 220.2 MPa和30.1%。
交叉轧制
轧制温度
织构
力学性能
AZ31 magnesium alloy
cross-rolling
rolling temperature
texture
mechanical property
Abstract
AZ31 alloy sheets with homogeneous microstructure were successfully fabricated by cross-rolling, and the effects of rolling temperature on grain size, texture and mechanical properties were investigated. The results show that the cross-rolling technology could effectively refine the microstructure of the alloy, and improved the homogeneousness of texture. The average grain size and maximum pole density decreased with the decreasing of deformation temperature, resulting in a good comprehensive mechanical property of sheets consequently. The average grain size and maximum pole density of AZ31 sheet cross-rolled at 250 ℃ were 4 μm and 8.4, respectively. The best comprehensive mechanical property which gave the ultimate tensile strength (UTS), yield strength (YS) and elongation of the sheets were 301.0 MPa, 220.2 MPa and 30.1%, respectively, at rolling temperature of 250 ℃.
中图分类号 TG146
所属栏目 试验研究
基金项目
收稿日期 2012/10/6
修改稿日期 2013/8/2
网络出版日期
作者单位点击查看
备注张蓉(1967-), 女, 湖南衡阳人, 副教授, 硕士。
引用该论文: ZHANG Rong,QIAN Shu-kun. Effects of Rolling Temperature on Microstructure and Mechanical Properties of AZ31 Sheets Fabricated by Cross-Rolling[J]. Materials for mechancial engineering, 2013, 37(10): 13～16
张蓉,钱书琨. 轧制温度对交叉轧制AZ31镁合金板材显微组织和力学性能的影响[J]. 机械工程材料, 2013, 37(10): 13～16
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参考文献
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【4】陈振华, 夏伟军, 程永奇, 等.镁合金织构与各向异性[J].中国有色金属学报 2005, 15(1): 1-11.
【5】CHENG Y Q, CHEN Z H, XIA W J. Drawability of AZ31 magnesium alloy sheet produced by equal channel angular rolling at room temperature[J].Materials Characterization, 2007, 58(7): 617-622.
【6】夏伟军, 蔡建国, 陈振华, 等.异步轧制AZ31镁合金的微观组织与室温成形性能[J].中国有色金属学报, 2010, 20(7): 1247-1253.
【7】ZHU S Q, YAN H G, CHEN J H, et al. Fabrication of Mg-Al-Zn-Mn alloy sheets with homogeneous fine-grained structures using high strain-rate rolling in a wide temperature range[J].Materials Science and Engineering: A, 2013, 559: 765-772.
【8】AL-SAMMAN T, GOTTSTEIN G. Influence of strain path change on the rolling behavior of twin roll cast magnesium alloy[J].Scripta Mateiralia, 2008, 59(7): 760-763.
【9】LI X, AL-SAMMAN T, GOTTSTEIN G. Mechanical properties and anisotropy of ME20 magnesium sheet produced by unidirectional and cross rolling[J].Materials and Design, 2011, 32(8/9): 4385-4393.
【10】张青来, 胡永学, 王粒粒, 等. 挤压后交叉轧制的镁合金薄板组织研究[J].热加工工艺, 2007, 31(9): 5-10.
【11】张青来, 卢晨, 朱燕萍, 等.轧制方式对AZ31镁合金薄板组织和性能的影响[J].中国有色金属学报, 2004, 14(3): 391-397.
【12】刘华强, 唐荻, 胡水平, 等.不同轧制工艺对AZ31镁合金薄板室温成形性能的影响[J].中国有色金属学报, 2012, 22(12): 3293-3299.
【13】GALIYEV A, KAIBYSHEV R, GOTTSTEIN G. Correlation of plastic deformation and dynamic recrystallization in magnesium ZK60[J].Acta Materialia, 2001, 49(7): 1199-1207.
【14】潘复生, 韩厚恩.高性能变形镁合金及加工技术[M].北京: 科学出版社, 2007.
【15】康志新, 彭永辉, 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.
【16】胡水平, 王哲.织构和晶粒尺寸对AZ31镁合金薄板成形性能的影响[J].中国有色金属学报, 2012, 22(9): 2424-2429.
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