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文章编号： 16726987（2018）05005305； DOI： 10.16351/j.16726987.2018.05.008
王娴娴, 马伯江*， 曹同坤
（青岛科技大学 机电工程学院, 山东 青岛 266061）
摘要： 为解决异形面涂层在高频感应熔覆或真空炉熔覆中存在的熔体下坠、厚薄不均匀等问题，采用冷焊技术在45钢表面熔涂Ni60镍基合金。试验中，利用多种理化手段分析了熔涂层的微观组织和成分；利用显微维氏硬度仪和往复式摩擦磨损试验机分别测试了熔涂层的显微硬度和磨损性能。结果表明：熔涂层与基体形成了良好的冶金结合，且熔涂层内含有部分非晶态合金；热处理后，熔涂层内非晶态合金原位形成纳米晶，使熔涂层二次强化；熔涂层的最终HV硬度可达745~983，耐磨性提高。
关键词： 冷焊熔覆； Ni60镍基合金； 微观组织； 耐磨性能
中图分类号： TG 11 文献标志码： A
引用格式： 王娴娴, 马伯江， 曹同坤. 原位生成纳米晶对冷焊熔涂层组织与耐磨性能的影响\[J\]. 青岛科技大学学报（自然科学版）， 2018， 39（5）： 5357.
WANG Xianxian， MA Bojiang， CAO Tongkun. Effect of nanocrystalline insitu on microstructure and wear resistance of cold welding cladding layer\[J\]. Journal of Qingdao University of Science and Technology（Natural Science Edition), 2018, 39(5)： 5357.
Effect of Nanocrystalline Insitu on Microstructure and Wear Resistance
of Cold Welding Cladding Layer
WANG Xianxian， MA Bojiang， CAO Tongkun
（College of Electromechanical Engineering, Qingdao University of Science and Technology, Qingdao 266061， China）
Abstract: In order to solve the problems such as the melting falling and uneven thickness which existed in specialshaped cladding layer by highfrequency induction melting or in vacuum furnace, the Ni60 Nibased alloy was deposited to 45 steel surface by cold welding technique. In the experiment, the microstructure and composition of the cladding layer were analyzed by various physical and chemical methods. The microhardness and wear properties of the cladding layer were tested by using microVickers hardness tester and reciprocating friction wear testing machine respectively.The results show that the cladding layer and substrate forms a good metallurgical bond, and the cladding layer contains some amorphous alloy. After heat treatment, the amorphous alloy in the cladding layer is formed situnano crystallines,therefore which maked secondary strengthening of cladding layer.The final HV hardness of cladding layer is up to 745—983, and the wear resistance is improved.
Key words: cold welding; Ni60 Nibased alloy; microstructure; wearresisting property
收稿日期： 20170622
基金项目： 山东省自然科学基金项目（ZR2017MEE076,ZR2016EEM41）.
作者简介： 王娴娴（1991—），女，硕士研究生.*通信联系人.
