刘强,刘思思,刘金刚,唐志成,武云文,廖君慧.激光微织构化铝合金表面的摩擦磨损研究[J].有色金属工程,2019,9(9):.
激光微织构化铝合金表面的摩擦磨损研究
Study on friction and wear of laser micro-textured aluminum alloy surfaces
投稿时间:2019-03-13  修订日期:2019-04-10
DOI:
中文关键词:  激光加工  微织构  铝合金  显微硬度  摩擦学性能
英文关键词:laser processing  microtexture  aluminum alloy  microhardness  tribological properties
基金项目:湖南省自然科学基金(2018JJ4055);长株潭国家自主创新示范区专项(2018XK2302, 2017XK2107);湖南省教育厅科学研究项目(18C0092, 18B074)
                 
作者单位
刘强 湘潭大学 汽车动力与传动系统湖南省重点实验室
刘思思 湘潭大学 汽车动力与传动系统湖南省重点实验室
刘金刚 湘潭大学 汽车动力与传动系统湖南省重点实验室
唐志成 湘潭大学 汽车动力与传动系统湖南省重点实验室
武云文 湘潭大学 汽车动力与传动系统湖南省重点实验室
廖君慧 湖南江滨机器集团有限责任公司
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中文摘要:
      采用脉冲Nd: YAG激光器在铝合金试件表面加工出具有规则形貌的圆形凹坑阵列,借助HSR-2M型高速往复摩擦磨损试验机,在滑动速度为0.15 m/s,载荷10 N的条件下,考察了乏油条件下圆形凹坑表面微织构的几何参数对“球-面”摩擦副摩擦学性能的影响,分析了激光加工对铝合金表面显微硬度的影响,并采用超景深显微系统对试件及对偶摩擦副表面的磨损特性进行了研究。结果表明:激光加工提高了铝合金基底的显微硬度;在乏油条件下,微织构化铝合金表面的平均摩擦系数与无织构表面相比明显减小,且波动稳定;经磨痕形貌分析可知,微织构化铝合金表面磨损程度减轻,当微凹坑直径为60 μm,即面密度为4.91%时,微织构化铝合金表面具有最佳的减摩、抗磨性能。
英文摘要:
      The aluminum alloy surfaces with circle-shaped micro cavities are fabricated by pulsed Nd: YAG laser. Under the conditions of sliding speed of 0.15m/s and 10N load, a series of frictional experiments with “ball and surface” friction pairs are conducted on a HSR-2M high-speed reciprocating friction and wear tester under the starved-oil lubrication condition. The influences of geometrical parameters of micro cavities on the tribological properties are investigated. The influence of laser processing on the microhardness of aluminum alloy was analyzed and the wear characteristics of the test piece and the dual friction pair surface were studied by using the ultra-deep microscope system. The results show that: the microhardness of aluminum alloy substrates after laser processing is significantly improved. Under the starved-oil lubrication condition, theaverage friction coefficient of the micro-textured aluminum alloy surface is significantly reduced compared with the non-textured surface, and the performance is more stable. According to the analysis of wear scar morphology, the surface wear of micro-textured aluminum alloy is reduced. The micro-texture of the circle surface has the optimal geometric parameters in the selected range. When the diameter of the micro cavity is 60μm and the areal density is 4.91%, the surface of the micro-textured aluminum alloy has the best anti-friction and anti-wear properties.
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