Mg-10Y-4Gd-1.5Zn-0.4Zr合金的摩擦磨损行为

采用球平面滑动摩擦试验机研究Mg-10Y-4Gd-1.5Zn-0.4Zr合金的摩擦磨损行为,对磨副选用AISI 52100型轴承钢球。研究在摩擦距离（400 m）不变的条件下,载荷（3-25 N）、摩擦速度（0.03-0.3 m/s）及摩擦温度（25-200℃）对磨损率的影响。通过SEM和EDS分析合金试样的磨损表面和磨屑形貌,并在相同的摩擦磨损条件下,选用一种过共晶Al-Si合金进行对比性的摩擦磨损实验。结果表明：铸态和T6态Mg-10Y-4Gd-1.5Zn-0.4Zr合金的磨损率低于T6态过共晶AC9B铝合金的磨损率。T6态Mg-10Y-4Gd-1.5Zn-0.4Zr合金的主要磨损机制是粘...

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Published in中国有色金属学报：英文版 Vol. 26; no. 2; pp. 406 - 413
Main Author 胡茂良 王渠东 吉泽升 许红雨 辛明德 马国睿
Format Journal Article
LanguageEnglish
Published 2016
Subjects
Mg-Y-Gd-Zn-Zr合金
滑动摩擦
磨损机制
磨损率
过共晶Al-Si合金
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ISSN1003-6326

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Summary:采用球平面滑动摩擦试验机研究Mg-10Y-4Gd-1.5Zn-0.4Zr合金的摩擦磨损行为,对磨副选用AISI 52100型轴承钢球。研究在摩擦距离（400 m）不变的条件下,载荷（3-25 N）、摩擦速度（0.03-0.3 m/s）及摩擦温度（25-200℃）对磨损率的影响。通过SEM和EDS分析合金试样的磨损表面和磨屑形貌,并在相同的摩擦磨损条件下,选用一种过共晶Al-Si合金进行对比性的摩擦磨损实验。结果表明：铸态和T6态Mg-10Y-4Gd-1.5Zn-0.4Zr合金的磨损率低于T6态过共晶AC9B铝合金的磨损率。T6态Mg-10Y-4Gd-1.5Zn-0.4Zr合金的主要磨损机制是粘着磨损,高载荷（10-25 N）条件下趋于粘着磨损和塑性变形混合磨损机制;高摩擦速度（0.12-0.3 m/s）条件下趋于粘着磨损和塑性变形,并伴有剥层磨损和氧化磨损;高温（100-200℃）条件下趋于氧化磨损和粘着磨损混合磨损机制。Mg-10Y-4Gd-1.5Zn-0.4Zr合金中Mg12Y1Zn1相的数量及稳定性直接影响合金的磨损率。
Bibliography:43-1239/TG
Mg-Y-Gd-Zn-Zr alloy; sliding wear; wear rate; wear mechanism; hypereutectic Al-Si alloy
Mao-liang HU, Qu-dong WANG, Ze-sheng JI, Hong-yu XU, Ming-de XIN, Guo-rui MA（ 1. School of Materials Science and Engineering, Harbin University of Science and Technology, Harbin 150040, China; 2. National Engineering Research Center for Light Alloy Net Forming, Shanghai Jiao Tong University, Shanghai 200240, China; 3. College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China）
Dry sliding wear tests were performed on a Mg-10Y-4Gd-1.5Zn-0.4Zr alloy using a Ball-on-Flat type wear apparatus against an AISI 52100 type bearing steel ball counterface. The wear rates were measured within a load range of 3-25 N, a sliding speed range of 0.03-0.3 m/s and a sliding temperature range of 25-200 ℃ at a constant sliding distance of 400 m. The morphologies of the worn surfaces and wear debris were studied by scanning electron microscopy （SEM） and energy dispersive X-ray spectroscopy （EDS）. Comparatively, the wear properties of a hypereutectic Al-Si aluminium alloy under the same condition were measured. The results indicate that the wear rates of Mg-10Y-4Gd-1.5Zn-0.4Zr alloy are lower than that of cast＋T6 AC9B aluminium alloy. The dominant mechanism of cast＋T6 Mg-10Y-4Gd-1.5Zn-0.4Zr alloy is abrasion wear mixed with other wear mechanisms, which tends to be an abrasion and plastic deformation wear at high normal load such as 10-25 N, abrasion and plastic deformation wears with small participation of delamination and oxidative wears at high sliding speed such as 0.12-0.3 m/s, and an oxidative and abrasion wear at high test temperature such as 100-200 ℃. The Mg12Y1Zn1 phase in Mg-10Y-4Gd-1.5Zn-0.4Zr alloy plays an important role in the wear rate.
ISSN:1003-6326