采用氩弧熔覆(GTAW)技术在45号钢表面制备了双层WC颗粒增强铁基体复合涂层,通过SEM,XRD和EDS分析了熔覆层的显微组织和相组成,并测试了熔覆层的显微硬度.结果表明:双层复合熔覆层内未见明显裂纹、夹杂等缺陷,与基体呈冶金结合;熔覆层的显微组织由未熔WC颗粒、灰色等轴状初晶和鱼骨状共晶碳化物组成;复合熔覆层的显微硬度由表及里先增加后降低,在近表面出现峰值,高达1 600HV0.2,约为基体硬度的5倍.
参考文献
[1] | 李荣久.陶瓷-金属复合材料[M].北京:冶金工业出版社,2004:2. |
[2] | 赵敏海,刘爱国,郭面焕.WC颗粒增强耐磨材料的研究现状[J].焊接,2006(11):26-29,47. |
[3] | 李巍,石凯,周勇,刘彦明.碳化钨耐磨药芯焊丝电弧堆焊工艺与性能的研究[J].热加工工艺,2005(02):49-50,53. |
[4] | 郝建军,马跃进,杨欣,刘俊峰.火焰熔覆镍基/铸造碳化钨熔覆层在犁铧上的应用[J].农业机械学报,2005(11):139-142. |
[5] | Liu DJ;Li LQ;Li FQ;Chen YB .WCp/Fe metal matrix composites produced by laser melt injection[J].Surface & Coatings Technology,2008(9):1771-1777. |
[6] | 黄继华,刘长松,党全坤,殷声.TiC/Fe-Al复合涂层反应火焰喷涂研究[J].粉末冶金技术,2002(04):219-222. |
[7] | Aiguo Liu;Mianhuan Guo;Minhai Zhao;Changbai Wang .Microstructures and wear resistance of large WC particles reinforced surface metal matrix composites produced by plasma melt injection[J].Surface & Coatings Technology,2007(18):7978-7982. |
[8] | Buytoz S;Ulutan M;Yildirim MM .Dry sliding wear behavior of TIG welding clad WC composite coatings[J].Applied Surface Science: A Journal Devoted to the Properties of Interfaces in Relation to the Synthesis and Behaviour of Materials,2005(5):1313-1323. |
[9] | 李福泉,陈彦宾,李俐群.Q235钢表面激光熔注WC涂层的微观组织及耐磨性[J].焊接学报,2010(04):28-32. |
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