| Sr、Mn复合加入对含铁AZ91铸态显微组织的影响 |
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| 引用本文： | 唐大超,范晓明,刘晨辉,马斌.Sr、Mn复合加入对含铁AZ91铸态显微组织的影响[J].中国铸造装备与技术,2011(6). |
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| 作者姓名： | 唐大超 范晓明 刘晨辉 马斌 |
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| 作者单位： | 1. 十堰职业技术学院,湖北十堰,442000
2. 武汉理工大学,湖北武汉,430070 |
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| 摘 要： | 采用光学显微镜(OM)、X射线衍射(XRD)和电子探针(EPMA)研究了0.5％Sr与不同加入量的Mn(wMn=0、0.2％、0.5％和0.8％)复合加入对含0.2％Fe的AZ91镁合金铸态显微组织的影响.结果表明:在Sr加入量一定的情况下,适量Mn的加入可以形成异质形核核心；而当Mn加入量达到0.8％时,有Al6Mn相形成,枝晶存在粗化为块状的趋势；Sr、Mn复合加入时,Mn毒化了Sr的细化效果；Mn的加入促进了Al4Sr的形成,Al4Sr相则弱化了Sr的细化效果.
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| 关 键 词： | Sr Mn 显微组织 |
Effects of Mixing Addition of Mn and Sr on the As-Cast Microstructure of AZ91 Alloy with Fe Content |
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| TANG DaChao,FAN XiaoMing,LIU ChenHui,MA Bin.Effects of Mixing Addition of Mn and Sr on the As-Cast Microstructure of AZ91 Alloy with Fe Content[J].China Foundry Machinery & Technology,2011(6). |
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| Authors: | TANG DaChao FAN XiaoMing LIU ChenHui MA Bin |
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| Affiliation: | TANG DaChao1,FAN XiaoMing2,LIU ChenHui2,MA Bin2(1.ShiYan Professional Technical Institute,Shiyan 442000,Hubei China,2.Wuhan Science and Technology University,Wuhan 430070 Hubei China) |
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| Abstract: | The effects of 0.5%Sr and different amount of Mn(WMn=0%,0.2%,0.5% and 0.8%)on the as-cast microstructure of AZ91 alloy with 0.2%Fe have been researched by optical microscope(OM),X-ray diffraction analysis(XRD) and electron probe microanalysis(EPMA).The results have shown that in circumstances of certain Sr adding amount,proper amount of Mn could form heterogeneous nucleation.When Mn content reached 0.8%,Al6Mn phase formed and the dendrites have coarse trend to the massive.Mn could poison the refinement effe... |
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| Keywords: | Sr Mn Microstructure |
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