mg3sn2alznnd镁合金摩擦磨损性能研究(附件)【字数：12911】
本文熔炼了Mg-3Sn-2Al-1Zn-0.6Nd和Mg-3Sn-2Al-1Zn两种成分的镁合金，并对其作了固溶和时效两种热处理。用金相显微镜观察了合金的形貌，用摩擦磨损仪测试了材料的摩擦磨损性能，用维氏硬度计测试了材料的显微硬度。用激光共聚焦显微镜观测了材料的摩擦磨损三维图。实验结果显示，稀土Nd的加入在一定程度上改善了材料的摩擦磨损性能，但是稀土镁合金固溶处理并没有明显的提升材料的摩擦磨损性能，原因是铸态合金中Sn元素的本身具有自润滑效果；加入稀土后，Nd和Sn形成新的复杂化合物，材料在增加固溶畸变的同时损失了自润滑，另铸态Mg-3Sn-2Al-1Zn合金易激活非基面滑移，林位错强化非常显著，弱化了合金的第二相强化效果。关于Mg-3Sn-2Al-1Zn和Mg-3Sn-2Al-1Zn-0.6Nd合金固溶、时效工艺仍然需要进一步深入研究。关键词稀土镁合金、摩擦磨损、摩擦系数
目录
第一章 绪 论......................................................................................................1
1.1 引 言...............................................................................................................1
1.2 镁合金的研究现状...........................................................................................2
1.2.1 镁的基本性质 ........................................................................................... 2
1.2.2 合金元素在镁合金中作用 ....................................................................... 3
1.3 镁合金的应用 .. *好棒文|www.hbsrm.com +Q: ￥351916072￥
............................................................................................. 4
1.4 MgAl 系镁合金 ...........................................................................................6
1.5 MgSn系镁合金..............................................................................................7
1.6 摩擦磨损概述..................................................................................................8
1.6.1 磨损分类....................................................................................................9
1.6.2 镁合金摩擦磨损研究进展.........................................................................10
1.7 本文主要研究内容.........................................................................................10
实验设备及实验方法....................................................................11
2.1 实验设备.......................................................................................................... 11
2.1.1 UMT2高温摩擦磨损试验机....................................................................11
2.1.2 ZEISS大型金相显微镜 ...........................................................................12
2.1.3 HT1000高温摩擦磨损试验机.................................................................12
2.1.4 MH5显微硬度计......................................................................................12
2.1.5 共聚焦激光扫描显微镜LEXTOLS4000...................................................13
2.2 试验方法............................................................................................................13
2.2.1 金相照片拍摄...............................................................................................13
目录
第一章 绪 论......................................................................................................1
1.1 引 言...............................................................................................................1
1.2 镁合金的研究现状...........................................................................................2
1.2.1 镁的基本性质 ........................................................................................... 2
1.2.2 合金元素在镁合金中作用 ....................................................................... 3
1.3 镁合金的应用 .. *好棒文|www.hbsrm.com +Q: ￥351916072￥
............................................................................................. 4
1.4 MgAl 系镁合金 ...........................................................................................6
1.5 MgSn系镁合金..............................................................................................7
1.6 摩擦磨损概述..................................................................................................8
1.6.1 磨损分类....................................................................................................9
1.6.2 镁合金摩擦磨损研究进展.........................................................................10
1.7 本文主要研究内容.........................................................................................10
实验设备及实验方法....................................................................11
2.1 实验设备.......................................................................................................... 11
2.1.1 UMT2高温摩擦磨损试验机....................................................................11
2.1.2 ZEISS大型金相显微镜 ...........................................................................12
2.1.3 HT1000高温摩擦磨损试验机.................................................................12
2.1.4 MH5显微硬度计......................................................................................12
2.1.5 共聚焦激光扫描显微镜LEXTOLS4000...................................................13
2.2 试验方法............................................................................................................13
2.2.1 金相照片拍摄...............................................................................................13
版权保护: 本文由 hbsrm.com编辑，转载请保留链接: www.hbsrm.com/hxycl/jscl/209.html
