表面改性对体育器械用AZ91合金耐磨性能的影响
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摘要
通过扫描电镜(SEM)、X射线衍射仪和摩擦磨损试验机等手段,研究了磁控溅射和微弧氧化对AZ91合金表面改性层组织与性能的影响。结果表明,磁控溅射Ti膜与AZ91合金基体结合良好,界面处没有发现气孔或者微裂纹等缺陷,Ti膜厚度约为4μm,与基体实现了良好冶金结合;随着微弧氧化时间从3min增加至12min,复合改性层的厚度不断增加,经过微弧氧化处理后,不同微弧氧化时间膜层的磨损率都有不同程度降低,氧化时间为3min、6min、9min和12min的微弧氧化膜的磨损率分别为1.62×10~(-3)mm~3·N~(-1)·m~(-1)、0.63×10~(-3)mm~3·N~(-1)·m~(-1)、1.25×10~(-3)mm~3·N~(-1)·m~(-1)和1.51×10~(-3)mm~3·N~(-1)·m~(-1),微弧氧化时间为6min的复合改性层具有最佳的耐磨性能。
The effects of magnetron sputtering and micro-arc oxidation on the structure and properties of surface modified layer of AZ91 alloy were studied by means of scanning electron microscopy(SEM),X-ray diffractometer and friction and wear tester. The results showed that Ti films deposited by magnetron sputtering had good bonding with AZ91 alloy matrix,and no defects such as pore or microcrack were found at the interface,the thickness of Ti films was about 4 microns,which realized good metallurgical bonding with AZ91 alloy matrix. With the increase of micro-arc oxidation time from 3 minutes to 12 minutes,the thickness of composite modified layer increased continuously,and after micro-arc oxidation treatment,the wear rate of the coating is decreased with different micro-arc oxidation time. The wear rates of the micro-arc oxidation coatings with oxidation time of 3 min,6 min,9 min and 12 min were 1.62×10~(-3)mm~3·N~(-1)·m~(-1),0.63×10~(-3)mm~3·N~(-1)·m~(-1),1.25×10~(-3)mm~3·N~(-1)·m~(-1) and 1.51×10~(-3)mm~3·N~(-1)·m~(-1),respectively. The composite modified coating with oxidation time of 6 min had the best wear resistance.
The effects of magnetron sputtering and micro-arc oxidation on the structure and properties of surface modified layer of AZ91 alloy were studied by means of scanning electron microscopy(SEM),X-ray diffractometer and friction and wear tester. The results showed that Ti films deposited by magnetron sputtering had good bonding with AZ91 alloy matrix,and no defects such as pore or microcrack were found at the interface,the thickness of Ti films was about 4 microns,which realized good metallurgical bonding with AZ91 alloy matrix. With the increase of micro-arc oxidation time from 3 minutes to 12 minutes,the thickness of composite modified layer increased continuously,and after micro-arc oxidation treatment,the wear rate of the coating is decreased with different micro-arc oxidation time. The wear rates of the micro-arc oxidation coatings with oxidation time of 3 min,6 min,9 min and 12 min were 1.62×10~(-3)mm~3·N~(-1)·m~(-1),0.63×10~(-3)mm~3·N~(-1)·m~(-1),1.25×10~(-3)mm~3·N~(-1)·m~(-1) and 1.51×10~(-3)mm~3·N~(-1)·m~(-1),respectively. The composite modified coating with oxidation time of 6 min had the best wear resistance.
引文
[1] 张智文.镁合金体育器械的表面喷涂与性能研究[J].热加工工艺,2018,47(08):107-110,113.
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[6] 姚军,陈宏洋,刘林林.溶胶-凝胶法AZ91D镁合金表面制备TiO2涂层及其腐蚀性能研究[J].热加工工艺,2012,41(16):123-124,127.
[7] Hoche H,Scheerer H,Probst D,et al.Development of a plasma surface treatment for magnesium alloys to ensure sufficient wear and corrosion resistance[J].Surface & Coatings Technology,2003,174(03):1018-1023.
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[2] 裔凯,曹丽杰,吴玉娟.镁合金耐磨性研究现状[J].轻合金加工技术,2018,46(07):8-16.
[3] 郭亚举.体育器械用镁合金的表面改性与性能研究[J].热加工工艺,2016,45(22):145-148.
[4] 刘建南,高峰,马思遥.体育器械用AZ91合金的表面改性处理研究[J].铸造技术,2015,36(12):2898-2900.
[5] 郭巧玲.电弧喷涂法镁合金AZ31表面改性与性能研究[J].材料开发与应用,2018,33(03):39-44.
[6] 姚军,陈宏洋,刘林林.溶胶-凝胶法AZ91D镁合金表面制备TiO2涂层及其腐蚀性能研究[J].热加工工艺,2012,41(16):123-124,127.
[7] Hoche H,Scheerer H,Probst D,et al.Development of a plasma surface treatment for magnesium alloys to ensure sufficient wear and corrosion resistance[J].Surface & Coatings Technology,2003,174(03):1018-1023.
[8] 沈轶娜.AZ91镁合金表面复合涂层的组织与性能研究[J].铸造技术,2014,35(10):2301-2303.