高速火焰喷涂三种Fe-Al复合涂层300℃冲蚀性能研究  

Research on Erosion Resistance of HVFS Sprayed Three Fe-Al Composite Coatings at 300℃

作　　者：刘爽[1] 徐润生[2] 

机构地区：[1]内蒙古工业大学材料科学与工程学院,呼和浩特010051 [2]内蒙古电力科学研究院,呼和浩特010021

出　　处：《热加工工艺》2006年第15期61-64,共4页Hot Working Technology

摘　　要：用高速火焰喷涂方法制备出Fe-15Al/45Cr3C2、Fe-15Al/15Cr3C2、Fe-15Al/15WC三种复合涂层,对三种涂层在温度300℃、冲蚀角分别为30°和90°下的抗冲蚀性能进行了研究,并利用扫描电镜对冲蚀后涂层的表面形貌进行分析。结果表明,在300℃下Fe-15Al/45Cr3C2复合涂层抗冲蚀性能最好,Fe-15Al/15Cr3C2复合涂层优于Fe-15Al/15WC复合涂层;三种涂层都表现出脆性冲蚀特征,但Fe-15Al/45Cr3C2复合涂层表现出一定的塑性冲蚀特征,本文称之为“准塑性冲蚀”,大量Cr3C2增强相的加入是其主要原因;冲蚀角对涂层抗冲蚀性能有较大影响。Three Fe-Al composite coatings （Fe- 15Al/45Cr3C2, Fe- 15Al/15Cr3C2, Fe-15Al/15WC） were made in the 20 steel by HVFS. The erosion resistance of three composite coatings was researched at 300℃, at the impingement angle of 30°and 90°. Three coatings surface were analyzed by SEM. The results show that Fe-15Al/45Cr3C2 composite coating＇s property of anti-erosion is the best, Fe-15Al/15Cr3C2 better than Fe-15Al/15WC, at 300℃. Three coatings show that the erosion mechanism is brittleness, but Fe-15Al/45Cr3C2 show that the erosion mechanism is quasi-plastic erosion, the chief reason is a lot of joined Cr3C2 reinforced phase. The effect of impingement angle on the erosion resistance is great.

关 键 词：高速火焰喷涂 准塑性冲蚀 复合涂层 冲蚀磨损 

分 类 号：TG174.44[金属学及工艺—金属表面处理]