钙对Mg-6Al变形镁合金显微组织和拉伸性能的影响
Effect of Calcium on Microstructure and Tensile Properties of Mg-6Al Wrought Magnesium Alloy
摘 要
研究了钙含量对Mg-6Al变形镁合金显微组织和拉伸性能的影响.结果表明:随着钙含量的增加,Mg-6Al合金中的β-Mg17Al12相逐渐变少、变细,铸态晶粒明显细化;大部分钙和铝结合生成高熔点Al2Ca相,能够阻碍晶粒的长大,使晶粒细化；钙的添加量少于1%时,随着钙含量的增加,合金的室温抗拉强度和伸长率均提高,钙的添加量大于1%时,合金的拉伸性能下降;钙含量为1%时,合金室温抗拉强度比不加钙时的提高了33.3%,伸长率达到2.65%,提高了1倍多.
钙
显微组织
拉伸性能
wrought magnesium alloy
calcium
microstructure
tensile property
Abstract
Effects of Ca content on microstructure and mechanical properties of Mg-6Al wrought magnesium alloy were investigated.It was found that with the increase of Ca content,β-Mg17Al12 phase of the alloy gradually changed little and thinner and the cast grain size was also refined obviously.Most Ca in the alloy reacted with Al to form compounds of Al2Ca with high melting point which could hider the grain growth and refined the grain.When the Ca content was less than 1wt%,the strength and elongation raised with the increase of Ca content.However,when it exceeded 1wt%,the mechanical properties decreased.When the Ca content was 1wt%,the alloy had the best properties with tensile strength being increased by 33.3% and elongation of 2.65% being increased by more than one time.
中图分类号 TG146.2
所属栏目 试验研究
基金项目 国家自然科学基金资助项目(50475157);教育部重点项目(105052)
收稿日期 2007/9/17
修改稿日期 2008/1/10
网络出版日期
作者单位点击查看
备注宫宁宁(1981-),女,山东青岛人,硕士研究生.
引用该论文: GONG Ning-ning,ZHANG Xing-guo,HAO Hai,FANG Can-feng,JIN Jun-ze. Effect of Calcium on Microstructure and Tensile Properties of Mg-6Al Wrought Magnesium Alloy[J]. Materials for mechancial engineering, 2008, 32(9): 20～23
宫宁宁,张兴国,房灿峰,金俊泽. 钙对Mg-6Al变形镁合金显微组织和拉伸性能的影响[J]. 机械工程材料, 2008, 32(9): 20～23
被引情况:
【1】王小明,邹利华,罗玉梅,宁爱林, "添加钙和钛对Mg-12Al-2Sr-0.3Mn镁合金组织与性能的影响",机械工程材料 40, 71-75(2016)
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【2】杨忠,李高宏.锑和稀土对Mg-9Al-0.4Zn合金铸态组织与力学性能的影响[J].铸造,2002,51(11):690-694.
【3】袁广银,孙扬善,王震.Sb低合金化对Mg-9Al基合金显微组织和力学性能的影响[J].中国有色金属学报,1999(12):779-784.
【4】孙扬善,翁坤忠,袁广银.Sn 对镁合金显微组织和力学性能的影响[J].中国有色金属学报,1999,9(1):55-60.
【5】Ninomiya R,Ojiro T,Kubopta K.Improved heat resistance of Mg-Al alloys by the Ca addition[J].Acta Metallurgica et Materialia,1995,43(2):669-674.
【6】白聿钦,赵丕峰,赵文波.Ag对Mg-Al-Zn 系镁合金显微组织和力学性能的影响[J].铸造,2003,52(2):98-100.
【7】Bettles C J.The effect of gold additions on the ageing behaviour and creep properties of the magnesium alloy AZ91E[J].Materials Science and Engineering A,2003,348A:280-288.
【8】余琨,黎文献,李松瑞,等.含稀土镁合金的研究与开发[J].特种铸造及有色合金,2001(1):41-43.
【9】梁维中,吉泽升,左锋,等.耐热镁合金的研究现状及发展趋势[J].特种铸造及有色合金,2003(2):39-41.
【10】周海涛,曾小勤.稀土铈对AZ61变形镁合金组织和力学性能的影响[J].中国有色金属学报,2004,14(1):99-104.
【11】张世军,黎文献,余琨.铈对镁合金AZ31晶粒大小及铸态力学性能的影响[J].铸造,2002,51(12):767-771.
【12】Tatiana V Larionova,Won-WookPark,Bong-Sun You,et al.A ternary phase observed in rapidly solidified Mg-Ca-Zn alloys[J].Scripta Materialia,2001,45:7-21.
【13】Ninomiya R,Ojiro T,Kubopta K.Improved heat resistance of Mg-Al alloys by the Ca addition[J].Acta Metallurgica et Materialia,1995,43(2):669-674.
【14】Pekguleryuz M O,Kaya A A.Creep resistant magnesium alloys for powertrain application[J].Advanced Engineering Materials,2002,5(12):866-878.
【15】Wang Qudong,Chen Wenzhou,Zeng Xiaoqin,et al.Effects of Ca addition on the microstructure and mechanical properties of AZ91 magnesium alloy[J].Journal of Materials Science,2001,36:3035-3040.
【16】Sakamoto M,Akiyama S,Ogi K,et al.Suppression of ignition and burning of molten Mg alloys by Ca bearing stable oxide film[J].Journal of Materials Science of Letters,1997,16(12):1048-1051.
【17】Bamberger M.Structural refinement of cast magnesium alloys[J].Journal of Materials Science and Techonlogy,2001(1):15-24.
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