【作者】 倪晓俊； 陆曹卫； 郭金花； 吴嘉伟； 薄希辉； 卢志超；

【Author】 Ni Xiaojun Lu Caowei Guojinhua Wujiawei Bo Xihui Lu Zhichao (Central Iron and Steel Research Institute,Beijing, 100081; Advanced Technology & Materials Co. ,Ltd.,Beijing, 100081; Northeast University, Shenyang, 110004)

【机构】 安泰科技股份有限公司； 钢铁研究总院； 东北大学；

【摘要】 一种铁基合金粉芯丝材被用于双丝电弧喷涂和钨极氩弧堆焊试验,并对喷涂层和堆焊层的结构性能进行了研究,结果表明:采用电弧喷涂工艺成功获得了高非晶、纳米晶含量的铁基非晶、纳米晶涂层,而堆焊层中未发现明显的非晶、纳米晶结构。喷涂层是由扁平化良好的粒子相互搭接堆积而成,比堆焊层更容易形成非晶、纳米晶结构,涂层致密度高、气孔率低、氧化物含量较少。硬度测试表明,两种表面硬化涂层均具有很高的硬度,热喷涂层的显微硬度HV0．1在670～1050范围,堆焊层的显微硬度HV0．1在1100～1373范围,但是堆焊层在3．5％NaCl溶液中的耐腐蚀性能不及热喷涂层。更多还原

【Abstract】 Twin-wire arc spraying and surfacing welding were operated with a kind of Fe-based flux cored wire, and the structures and properties of these coatings were investigated. The results show that there was a large volume of amorphous and nanocrystalline structure in the arc spray coatings and no amorphous and nanocrystalline structure in the surfacing welding layers. Spray coatings, with low porosity, little oxide and high density,consisted of a plenty of particles that were flated and deposited on the substrates and were easier to form amorphous and nanocrystalline structure than welding layers. The Vickers microhardness of the samples was studied under 0.1 kg load and was high in two type of hard surface coatings. The microhardness was between HV0.1670 and HV0.1 1050 in arc spray coating and between HV0.11100 and HV0.11373 in surfacing welding layer. Corrosion resistance of surfacing welding layer in 3.5 % NaCl solution was worse than that of arc spray coating.更多还原