摘要
设计开发了Fe—Cr—P—B-C系粉芯丝材，采用双丝电弧喷涂方法在Q235基体表面制备相应涂层，并利用X射线衍射（x—ray diffraction，XRD）、扫描电子显微镜（scanning electron microscope，SEM）、磨粒磨损试验机和电化学工作站，研究添加P元素对涂层微观组织结构、磨损和腐蚀行为的影响规律．结果表明：涂层由变形良好的扁平化粒子相互搭接堆积而成，孔隙率为3％～4％．所制备的涂层均具有非晶／纳米晶复合相结构特征，但引入P元素部分替代合金系中B元素后导致涂层的非晶相质量分数有所降低．随着添加的x（P）的提高，涂层显微硬度及耐磨性有所下降，但影响并不显著，涂层相对耐磨性依然保持在基材的5～8倍．而添加P元素后，涂层自腐蚀电位显著提高，有利于其耐蚀性能．在所研究范围内，添加2％P元素时涂层具有相对较为优异的耐蚀、耐磨综合性能．
Cored wires Fe-Cr-P-B-C system was designed, and coatings were prepared by twin wire arc spraying on Q235 substrate. The influence law on microstructure, wear resistance and electrochemical corrosion resistance of coatings with phosphorus were investigated by X-ray diffraction （XRD） , scanning electron microscope （SEM） , abrasive wear testing machine, and electrochemical workstation. Results showed that the as-deposited coatings consisted of numerous flattened lamellae parallel to the substrate. The porosities of coatings were about 3% -4%. The coatings were amorphous/nanocrystalline composite coatings. However, the partial substitution P for B in the alloy system resulted in the reduction of amorphous content. The microhardness and wear resistance decreased slightly with the increase of x（P） , but not notable. The abrasive wear resistance of coatings was 5 - 8 times higher than that of the Q235 substrate. The free corrosion potential increased after adding the phosphorus element into the coatings, which was beneficial to corrosion resistance of coatings. In this study, the coating with 2% phosphorus addition had comparatively better wear and corrosion resistance.
出处
《北京工业大学学报》
CAS
CSCD
北大核心
2013年第10期1576-1580,共5页
Journal of Beijing University of Technology
基金
北京市教委科技创新平台项目(JJ009012201201)
关键词
铁基涂层
微观组织结构
磨损行为
腐蚀行为
Fe-based coating
microstructure
wear behavior
corrosion behavior
