摘要
使用THT07 135高温磨损实验机对高速电弧喷涂FeAl,Fe Al/Cr3C2,FeAlCr/Ni包Cr3C2复合涂层进行了滑动摩擦特性的研究,并用SEM、TEM、XRD等手段观察分析了磨痕的形貌和成分、涂层截面的组织和相结构。结果表明:FeAlCr/Ni包Cr3C2复合涂层具有典型的层状结构和较高的结合强度和硬度;从室温到250℃,涂层的抗磨损性能下降;从250℃到550℃,涂层磨损性能变化不大;550℃以后,涂层的耐磨损性能重新增强;剥层磨损是FeAlCr/Ni包Cr3C2涂层高温磨损的主要机理;Cr3C2增强相的加入,大大提高了涂层的耐磨损性能;Ni的加入一定程度提高了涂层的结合强度和抗磨损性能。
THT07-135 high temperature wear machinery was used to analyse tribological properties of high velocity arc sprayed FeAl, Fe-Al/Cr_3C_2, FeAlCr/Ni wrapped Cr_3C_2 composite coatings. The wear scar morphologies and compositions of coatings were analyzed by SEM, TEM and XRD methods. Results show that FeAlCr/Ni wrapped Cr_3C_2 composite coatings have typically layer shaped structure and relatively high bonding strength and hardness. The wear resistance of coatings decreases in the range from room temperature to 250 ℃, and it changes little in the range from 250 ℃ to 550 ℃, then wear resistance of coatings rises again after 550 ℃.Shell tribology behavior is mainly the high temperature wear mechanism of coatings. The addition of Cr_3C_2 can improve the wear resistance of coatings highly; the addition of Ni can also relatively enhance bonding strength and wear properties of coatings.
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2004年第10期1671-1676,共6页
The Chinese Journal of Nonferrous Metals
基金
国家自然科学基金资助项目(50235030
50005024)
