两种WC基涂层在600℃下的摩擦学性能
Tribological Behavior of Two Types of WC-based Coatings at 600℃
查看参考文献14篇
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文摘
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采用超音速火焰喷涂技术制备了WC-(W,Cr)_2C-Ni和WC-17Co两种涂层,评价了两种涂层在高低温快速交变条件下的热震性能,并使用SRV摩擦磨损试验机考察了两种涂层从室温到600℃时与Si_3N_4球配副时的摩擦磨损性能。结果表明:WC-(W,Cr)_2C-Ni涂层的抗热震性能远优于WC-17Co涂层;WC-17Co涂层虽具有较低的磨损率,但是高温下涂层中产生大量裂纹及发生因严重氧化而导致的硬度下降,表明该涂层不适于作为400℃以上的耐磨材料;尽管WC-(W,Cr)_2C-Ni涂层的磨损率比WC-17Co涂层大,但仍属于微量磨损,且其具有优异的抗高温氧化性能和抗热震性能,所以该涂层非常适于作为高温或宽温域下的耐磨材料。 |
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其他语种文摘
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WC-17Co and WC-(W,Cr)_2C-Ni coatings were prepared by high velocity oxy-fuel (HVOF) spraying. The thermal shock resistance of the coatings under rapidly alternate high and low temperatures was measured. Moreover, the friction and wear behavior of the coatings sliding against Si_3 N_4 ball up to 600℃ was investigated using a SRV friction and wear tester. Results show that the thermal shock resistance of WC-(W,Cr)_2C-Ni coating is far superior to that of WC-17Co coating. WC-17Co coating has lower wear rate, however, severe cracks appear in the coating and largely decrease its hardness owing to serious oxidization, which show that this coating can not be used as wear resistant material above 400℃. Though WC- (W,Cr)_2C-Ni coating possesses larger wear rate, it still show the feature of "mild wear" over the whole temperature range. Moreover, the high temperature oxidization resistance and thermal shock resistance of WC-(W,Cr)_2C-Ni coating are superior; thus it is very suitable for wear resistant material at high temperature or over a wide temperature range. |
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来源
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中国表面工程
,2012,25(6):61-67 【扩展库】
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关键词
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超音速火焰喷涂
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WC-17Co涂层
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WC-(W,Cr)_2C-Ni涂层
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热震性能
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摩擦磨损
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地址
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中国科学院兰州化学物理研究所, 固体润滑国家重点实验室, 兰州, 730000
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语种
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中文 |
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ISSN
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1007-9289 |
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学科
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金属学与金属工艺 |
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基金
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国家自然科学基金创新研究群体项目
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中国科学院知识创新工程重要方向项目
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文献收藏号
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CSCD:4731585
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参考文献 共
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