摘要
以Fe-Cr-C合金粉末为原料,利用等离子熔覆技术在45号钢表面制备了(Cr,Fe)7C3/-γFe复合涂层。并对涂层的显微组织、显微硬度和室温干滑动实验进行了具体分析。结果表明:涂层组织包括初生相(Cr,Fe)7C3以及-γFe与(Cr,Fe)7C3组成的共晶;其组织有明显的由基材到涂层外延生长的特征,结构均匀,与基材之间为完全冶金结合;且具有较高的硬度及合理的硬度梯度。该涂层在室温干滑动磨损实验条件下具有优异的耐磨性。
A wear resistant（Cr, Fe）7C3/γ-Fe composite coating was fabricated on substrate of a 0.45 % C carbon steel by plasma transferred arc cladding process using Fe-Cr-C elemental powder blends. The microstructure,microhardness and dry - sliding wear resistance of the coating were evaluated. Results indicate that the PTA clad ceramal coating microstructure consists of primary （Cr, Fe）7C3 phase uniformly distributed in the eutectic matrix of γ-Fe and（Cr, Fe）7C3 metallurgically bonded to the substrate. The microstructure of PTA clad composite coating has visible character istu of epitaxila growth from substrate to coating,The coating has high hardness and excellent wear resistance under dry sliding wear test conditions.
出处
《粉末冶金工业》
CAS
北大核心
2006年第1期22-26,共5页
Powder Metallurgy Industry
关键词
等离子熔覆
复合涂层
显微组织
耐磨性
Plasma transferred arc cladding
composite coating
microstructure
Wear - resistance
