论文部分内容阅读
对Ti-B4C-Co粉末进行了喷雾造粒法处理,获得了粉末直径为10~50μm的球形度良好的喷涂粉末,并在750℃真空热处理1 h,粉末中含氧量大大降低。以热处理后的造粒粉为喷涂材料,采用反应爆炸喷涂法获得了厚度为50~70μm的Ti-B-C-N复合涂层,对不同工艺参数下的涂层物相、显微结构以及人工海水中的电化学行为进行了分析。结果表明,在不同参数下获得的涂层物相有所差异,涂层中均含氧化物。在氧乙炔比为1∶0.85的工艺条件下获得的涂层较致密,涂层较厚。不同工艺参数下获得的涂层在电解液中性能稳定,自腐蚀电位均高于碳钢基体,存在明显的钝化区,涂层的耐蚀性得到了显著提高,氧乙炔比为1∶0.85的工艺条件下获得的涂层耐蚀性更佳。
The Ti-B4C-Co powder was spray granulated to obtain a good sphericity powder with a diameter of 10-50μm. After vacuum heat treatment at 750 ℃ for 1 h, the content of oxygen in the powder decreased greatly. The heat-treated granulated powder is used as the spray material, and the Ti-BCN composite coating with the thickness of 50-70μm is obtained by the reaction explosion spraying method. The coating phase, microstructure and artificial seawater under different technological parameters Electrochemical behavior was analyzed. The results show that the coatings obtained under different parameters are different, and the coatings contain oxides. In the oxyacetylene ratio of 1: 0.85 under the conditions of the coating obtained more dense, thick coating. The coating obtained under different process parameters has stable performance in electrolyte and self-corrosion potential higher than that of carbon steel substrate, with obvious passivation zone and corrosion resistance of the coating significantly increased. The ratio of oxyacetylene to acetylene is 1: 0.85 The process conditions obtained coating corrosion resistance better.