引用本文:鲍君峰， 马尧， 胡宇.不同制粉工艺对NiAlW粉末及涂层组织性能的影响[J].中国表面工程,2013,26(5):70~76
BAO Junfeng, MA Yao, HU Yu.Effects of Different Technology of Powder Producing on the Properties of NiAlW Powder and Coating[J].China Surface Engineering,2013,26(5):70~76
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不同制粉工艺对NiAlW粉末及涂层组织性能的影响
鲍君峰， 马尧， 胡宇1,2,3
1.北京矿冶研究总院， 北京 100070;2.北京市工业部件表面强化与修复工程技术研究中心， 北京 100160;3.特种涂层材料与技术北京市重点实验室， 北京100160
摘要:
对大气雾化和真空大气雾化工艺制备的两种不同的NiAlW合金粉末，进行了粉末物性对比、粉末及粉末剖面结构的形貌对比、粉末化学成分对比，结果表明，真空雾化工艺制备的NiAlW合金粉末对比大气雾化工艺制备的NiAlW合金粉末具有更好的流动性、更高的松装密度、更好的球形度及更低的氧含量，粉末性能对比结果显示真空雾化工艺制备的粉末性能较好；采用大气等离子喷涂制备了涂层，分析了两种涂层SEM形貌和孔隙率，对比了涂层的显微硬度、结合强度和耐磨损性能。结果表明：用真空大气雾化工艺制备的NiAlW涂层孔隙率低、显微硬度低、结合强度高、耐磨损性好，显示出更好的综合性能。粉末初始形貌及化学成分的差异可导致喷涂层性能的差异，球形度好、氧含量低且杂质含量低的粉末经喷涂后更易形成高致密的涂层。
关键词:  大气雾化； 真空气雾化； NiAlW合金粉末  等离子喷涂
DOI：10.3969/j.issn.1007-9289.2013.05.013
分类号:
基金项目:
Effects of Different Technology of Powder Producing on the Properties of NiAlW Powder and Coating
BAO Junfeng, MA Yao, HU Yu1,2,3
1.Beijing General Research Institute of Mining and Metallurgy, Beijing 100070;2.Beijing Engineering Technology Research Center of Surface Strengthening and Repairing of Industry parts, Beijing 100160;3.Beijing Key Laboratory of Special Coating Materials and Technology, Beijing 100160
Abstract:
Two types of NiAlW alloy powders produced by gas atomization and vacuum atomization were compared at physical property,original powder’s and sectional SEM, and chemical component,.The result indicates that NiAlW alloy powders produced by vacuum atomization have better flowing power,higher apprant density,better spherical shape and lower oxygen content. Powder property displays that NiAlW alloy powders produced by vacuum atomization have better combination property. Coatings were sprayed by air plasma spraying with NiAlW powders produced by gas atomization and vacuum atomization. Two types of coatings were analyzed on SEM pattern and porosities, as well as microhardness,bonding strength and frictional wear performance were compared. The results show that NiAlW coating prepared by vacuum atomization exhibits better combination property, such as lower coating’s porosities,lower microhardness,higher bond strength, and better resistance to frictional wear. The differences of initial pattern and chemical component induce the coating’s variant expressions, and it is easier for powders with better sphericity, lower oxygen content, and lower impurity content after being sprayed the form highintegrity coating.
Key words:  gas atomization  vacuum atomization  NiAlW alloy powder  plasma spray
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