| 引用本文: | 郑润国,黄婷,武凯琦,林小娉.时效Mg-8.14Zn-1.44Y-0.5Zr合金高温摩擦磨损性能研究[J].材料科学与工艺,2019,27(5):34-38.DOI:10.11951/j.issn.1005-0299.20180261. |
| ZHENG Runguo,HUANG Ting,WU Kaiqi,LIN Xiaopin.Friction and wear properties of aging Mg-8.14Zn-1.44Y-0.5Zr alloy at elevated temperature[J].Materials Science and Technology,2019,27(5):34-38.DOI:10.11951/j.issn.1005-0299.20180261. |
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| 时效Mg-8.14Zn-1.44Y-0.5Zr合金高温摩擦磨损性能研究 |
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郑润国1,2,黄婷2,武凯琦2,林小娉1,2
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(1.东北大学 材料科学与工程学院,沈阳 110819;2.东北大学秦皇岛分校 资源与材料学院,河北 秦皇岛066004) [HJ1.8mm]
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| 摘要: |
| 镁合金在航空航天、汽车及通讯领域有着广泛的应用, 为进一步改善镁合金的耐磨性，在不同温度下对Mg-8.14Zn-1.44Y-0.5Zr合金进行了时效处理，并测试了铸态和时效态合金的硬度及高温条件下摩擦磨损行为.采用扫描电子显微镜对不同载荷及环境温度条件下合金的摩擦磨损表面进行观察，并分析了其磨损机制.结果表明：在240 ℃时，随着时效时间的增加，合金的硬度值呈现先增加而后降低的趋势，当时效温度为240 ℃，时间为12 h时，Mg-8.14Zn-1.44Y-0.5Zr合金具有最高的硬度值; 铸态合金的磨损体积损失明显高于时效态合金，两种合金的磨损体积损失均随载荷和环境温度增加而增大，且时效态合金发生严重磨损时对应的转变温度滞后于铸态合金; 环境温度低于250 ℃时，合金的磨损机制主要为磨粒磨损和氧化磨损，环境温度为300 ℃时，磨损机制变为剥层磨损和黏着磨损.时效处理可显著提高Mg-8.14Zn-1.44Y-0.5Zr合金的硬度及耐磨性. |
| 关键词: 镁合金 滑动摩擦 磨损体积损失 高温磨损 磨损机制 |
| DOI：10.11951/j.issn.1005-0299.20180261 |
| 分类号:TG15 |
| 文献标识码:A |
| 基金项目:国家自然科学基金资助项目(51675092). |
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| Friction and wear properties of aging Mg-8.14Zn-1.44Y-0.5Zr alloy at elevated temperature |
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ZHENG Runguo1,2, HUANG Ting2, WU Kaiqi2, LIN Xiaopin1,2
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(1. School of Materials Science and Engineering, Northeastern University, Shenyang 110819, China; 2. School of Resources and Materials, Northeastern University at Qinhuangdao, Qinhuangdao 066004, China) [HJ1.45mm]
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| Abstract: |
| Magnesium alloys are widely used in aerospace, automobile and communication fields. In order to improve the wear resistance of magnesium alloy, the aging treatment of Mg-8.14Zn-1.44Y-0.5Zr alloy was carried out under different temperatures. The hardness and the friction and wear behavior of as cast and aged alloys were tested at high temperatures under dry sliding conditions. The friction and wear surfaces of the alloy under different loads and ambient temperatures were observed by scanning electron microscopy, and the wear mechanism was analyzed. The results showed that the hardness of the alloy increased firstly and then decreased with aging time at 240 ℃. When the aging time was 12 h, the Mg-8.14Zn-1.44Y-0.5Zr alloy had the highest hardness value. The wear volume loss of the cast Mg-8.14Zn-1.44Y-0.5Zr alloy was obviously higher than that of the aging alloy at high temperatures. The wear volume loss increased with the increase of applied loads and ambient temperatures. The corresponding transition temperature was lagged behind the as cast alloy when severe wear occurred. When the ambient temperature was below 250 ℃, the wear mechanism of the aging alloy was mainly abrasive wear and oxidation wear. When the ambient temperature was 300 ℃, the wear mechanism became delamination wear and adhesion wear. The hardness and wear resistance of Mg-8.14Zn-1.44Y-0.5Zr alloy can be significantly improved by aging treatment. |
| Key words: magnesium alloy sliding wear wear volume loss high temperature wear wear mechanism 收稿日期: 2018-09-03.网络出版日期: 2018-11-21. 基金项目: |
