枪管长度和喷涂距离对超音速火焰喷涂制备纳米WC-12Co涂层组织和硬度的影响
Influence of Barrel Length and Spray Distance on Microstructure and Microhardness of Nanostructured WC-12Co Coatings Deposited by HVOF
摘 要
以纳米WC-12Co粉末为喷涂喂料,采用超音速火焰喷涂工艺,在其它喷涂工艺参数优化的条件下,只改变枪管长度和喷涂距离,在Q235钢基体上制备了八种涂层；用X射线衍射仪和扫描电镜对喷涂粉末及涂层进行了相结构和形貌分析,探讨了枪管长度和喷涂距离对涂层显微硬度、相结构以及表面形貌的影响.结果表明:与喷距相比,枪管长度是影响纳米WC涂层显微硬度的主要因素,用长枪管制备的涂层比短枪管制备的涂层分解严重,但相应涂层的显微硬度却显著提高；当枪管长度相同时,喷距变化也会对涂层的相结构、表面形貌和显微硬度产生一定的影响.
超音速火焰
WC-12Co
纳米粉末
coating
high velocity oxygen fuel(HVOF)
WC-12Co
nano-powder
Abstract
Eight kinds of nanostructured WC-12Co coatings were prepared by high velocity oxygen fuel (HVOF) spraying technology on Q235 steel substrate with different barrel lengths and spray distances.Phases of the feedstock powders and coatings were analyzed by XRD.The surface morphology of spraying powders and sprayed coatings was analyzed by SEM.The microhardness of the coatings was also tested.The results indicate that the barrel length is the key factor to control the decomposition of nanostructured WC during spraying.The coatings deposited by using long barrel experienced more severe decarburization but showed higher microhardness than those coatings deposited by using short barrel.When the barrels length was the same,spray distance also had some effect on the phases,surface morphology and microhardness of the coatings.
中图分类号 TG174.442
所属栏目 试验研究
基金项目 国家自然科学基金资助项目(50479016)
收稿日期 2007/9/27
修改稿日期 2008/1/8
网络出版日期
作者单位点击查看
备注王群(1972-),男,安徽郎溪人,副教授,博士研究生.
引用该论文: WANG Qun,DING Zhang-xiong,CHEN Zhen-hua,ZHANG Shi-ying,BAI Hong-wu,LI Xue-qian,ZHAO Gang. Influence of Barrel Length and Spray Distance on Microstructure and Microhardness of Nanostructured WC-12Co Coatings Deposited by HVOF[J]. Materials for mechancial engineering, 2008, 32(9): 9～12
王群,丁彰雄,陈振华,张世英,柏洪武,李学谦,赵刚. 枪管长度和喷涂距离对超音速火焰喷涂制备纳米WC-12Co涂层组织和硬度的影响[J]. 机械工程材料, 2008, 32(9): 9～12
被引情况:
【1】王洪涛,纪岗昌,陈枭,白小波,陈清宇,富伟, "超音速火焰喷涂碳化物金属陶瓷涂层的磨粒磨损性能",机械工程材料 35, 44-47(2011)
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参考文献
【1】高阳,史雅琴,辛刚,等.等离子喷涂碳化钨涂层组织与喷涂条件的关系[J].机械工程材料,2002,26(2):25-27.
【2】王辉平,胡茂中.纳米技术与硬质合金[J].中国钨业,2001,16(2):30-32.
【3】McCandlish L E.Production capability and powder processing of nano-structured tungsten carbide-cobalt[J].Metal Powder Report,1997,52(12):41-44.
【4】Jia K,Fischer T E.Sliding wear of conventional and nanostructured cemented carbides[J].Wear,1997,203:310-318.
【5】张云乾,丁彰雄,范毅.HVOF喷涂纳米WC-12Co涂层的性能研究[J].中国表面工程,2005,18(6):25-29.
【6】Stewart D A,Shipway P H,McCartney D G.Microstructural evolution in thermally sprayed WC-Co coatings:comparison between nanocomposite and conventional starting powders[J].Acta Materialia,2000,48(7):1593-1604.
【7】周克崧,宋进兵,刘敏,等.热喷涂技术替代电镀硬铬的研究进展[J].材料保护,2002,35(12):1-4.
【8】Celik E,Culha O,Uyulgan B.Assessment of microstructural and mechanical properties of HVOF sprayed WC-based cermet coatings for a roller cylinder[J].Surface & Coatings Technology,2006,200(14/15):4320-4328.
【9】Wirojanupatump S,Shipway P H,McCartney D G.The influence of HVOF powder feedstock characteristics on the abrasive wear behavior of CrxCy-NiCr coatings[J].Wear,1997,249(9):829-837.
【10】Ganesh S,Ruvee Y,Bernard H,et al.Multimodal powders:a new class of feedstock material for thermal spraying of hard coatings[J].Scripta Materialia,2001,8/9:1699-1702.
【11】Ross F.High-velocity oxygen fuel thermal spray deposition of nanostructured tungsten carbide-cobalt composites[D].Connecticut:University of Connecticut,2001:22-23.
【12】常维纯,宗少彬,李广群.工艺参数对HVOF喷涂WC-Co 涂层磨损性能的影响[J].材料开发与应用,2006,21(3):30-32.
【13】Baik K H,Kimb J H,Seong B G.Improvements in hardness and wear resistance of thermally sprayed WC-Co nanocomposite coatings[J].Materials Science and Engineering A,2007,449/451:846-849.
【2】王辉平,胡茂中.纳米技术与硬质合金[J].中国钨业,2001,16(2):30-32.
【3】McCandlish L E.Production capability and powder processing of nano-structured tungsten carbide-cobalt[J].Metal Powder Report,1997,52(12):41-44.
【4】Jia K,Fischer T E.Sliding wear of conventional and nanostructured cemented carbides[J].Wear,1997,203:310-318.
【5】张云乾,丁彰雄,范毅.HVOF喷涂纳米WC-12Co涂层的性能研究[J].中国表面工程,2005,18(6):25-29.
【6】Stewart D A,Shipway P H,McCartney D G.Microstructural evolution in thermally sprayed WC-Co coatings:comparison between nanocomposite and conventional starting powders[J].Acta Materialia,2000,48(7):1593-1604.
【7】周克崧,宋进兵,刘敏,等.热喷涂技术替代电镀硬铬的研究进展[J].材料保护,2002,35(12):1-4.
【8】Celik E,Culha O,Uyulgan B.Assessment of microstructural and mechanical properties of HVOF sprayed WC-based cermet coatings for a roller cylinder[J].Surface & Coatings Technology,2006,200(14/15):4320-4328.
【9】Wirojanupatump S,Shipway P H,McCartney D G.The influence of HVOF powder feedstock characteristics on the abrasive wear behavior of CrxCy-NiCr coatings[J].Wear,1997,249(9):829-837.
【10】Ganesh S,Ruvee Y,Bernard H,et al.Multimodal powders:a new class of feedstock material for thermal spraying of hard coatings[J].Scripta Materialia,2001,8/9:1699-1702.
【11】Ross F.High-velocity oxygen fuel thermal spray deposition of nanostructured tungsten carbide-cobalt composites[D].Connecticut:University of Connecticut,2001:22-23.
【12】常维纯,宗少彬,李广群.工艺参数对HVOF喷涂WC-Co 涂层磨损性能的影响[J].材料开发与应用,2006,21(3):30-32.
【13】Baik K H,Kimb J H,Seong B G.Improvements in hardness and wear resistance of thermally sprayed WC-Co nanocomposite coatings[J].Materials Science and Engineering A,2007,449/451:846-849.
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