激光熔覆原位自生TiC-VC复合增强铁基合金层的研究  

In situ synthesis of TiC-VC particles reinforced Fe-based MMC coatings produced by laser cladding

作　　者：赵冠琳[1] 邹增大[1] 王新洪[1] 杜宝帅[1] 

机构地区：[1]山东大学材料科学与工程学院,山东济南250061

出　　处：《山东大学学报（工学版）》2008年第2期6-9,17,共5页Journal of Shandong University（Engineering Science）

基　　金：教育部博士点基金(060422020)

摘　　要：利用钛铁、钒铁、石墨等组分,采用5 kW横流CO2激光器在低碳钢板上熔覆制备出原位自生TiC-VC复合碳化物颗粒增强Fe基合金层.利用金相显微镜、X射线衍射仪、电子探针及滑动磨损试验机,研究了合金熔覆层的显微组织及性能.研究结果表明,通过钛铁、钒铁与石墨之间的反应,可以得到TiC-VC复合碳化物增强相,细小的TiC-VC复合碳化物颗粒弥散分布在Fe基体之中,合金熔覆层的耐磨性在一定范围内随增强颗粒的增加而提高.Using a 5 kW CO2 laser, in situ synthesis of TiC-VC particles reinforced Fe-based alloy composite coatings were put forth by using fermtitanium, fermvanadium and graphite. The microstructure and properties of the composite coatings were investi- gated by optical microscopy, X-ray diffractometer （XRD）, electron probe microanalyzer （EPMA） and a skimming wear machine. Results indicate that TiC-VC particles can be produced by direct metallurgical reaction between fermtitanium, fermvanadium and graphite during the laser cladding process. It was also found that fine TiC-VC particles disperse in the matrix. The wear-resisting property of the higher TiC-VC particles coating is larger than the lower ones in certain areas.

关 键 词：激光熔覆 原位自生 TiC-VC复合颗粒 

分 类 号：TB331[一般工业技术—材料科学与工程] TG159.9[金属学及工艺—热处理]