SHM1302硬面层热震和高温磨损行为  

Thermal Shock and High Temperature Wear Behaviors of SHM1302 Hard-Faced Layer

作　　者：费彦民 吴汝飞 李奇 高安阳 斯庭智[2] FEI Yanmin;WU Rufei;LI Qi;GAO Anyang;SI Tingzhi(Angong Machinery Manufacturing Company of An Hui,Maanshan 243131,China;School of Materials Science and Engineering,Anhui University of Technology,Maanshan 243002,China;Technology Center,Ma Steel Heavy Machinery Manufacturing Company of An Hui,Maanshan 243000,China)

机构地区：[1]安徽省安工机械制造有限公司,安徽马鞍山243131 [2]安徽工业大学材料科学与工程学院,安徽马鞍山243002 [3]安徽马钢重型机械制造有限公司技术中心,安徽马鞍山243000

出　　处：《材料保护》2025年第3期70-79,共10页Materials Protection

基　　金：安徽省科技重大专项(202103a05020036)。

摘　　要：为研判SHM1302硬面层的高温应用范围,分别测试了SHM1302堆焊硬面层的抗热震和耐高温磨损性能,通过X射线衍射(XRD)、扫描电镜(SEM)、能谱(EDX)等表征手段探明了硬面层热震和高温磨损行为,建立了高温氧化和组织转变与热震和高温磨损行为的关系。结果表明:SHM1302热震裂纹的萌生和扩展受应力和氧化的共同作用,裂纹主要沿基体和碳化物界面扩展;随热震循环的进行,氧化膜中MnFe_(2)O_(4)有害相的生成和基体中(Fe,Cr)_(3)C的析出,促进了热震裂纹的扩展。500℃下,硬面层高温磨损性能优良;600℃和700℃下的磨损量较500℃分别显著增加1244%和1596%。磨损温度由500℃升高到600℃时,氧化速率的增加及有害相MnFe_(2)O_(4)的生成是磨损性能快速下降的关键;700℃磨损时发生的MA组织转变促进疲劳裂纹的萌生,进一步加快了磨损进程。To evaluate the high temperature application range of SHM1302 hard surface layer,the thermal shock resistance and high tempera-ture wear resistance of SHM1302 hard surface layer were tested respectively,and the thermal shock and high temperatue wear behavior of hard surface layer were investigated by X-ray diffraction(XRD),scanning electron microscopy(SEM),energy dispersive X-ray spectroscopy(EDX)and other characterization methods.In addition,the relationship between high-temperature oxidation/microstructure transformation and thermal shock/high-temperature wear behavior was established.Results showed that the initiation and propagation of SHM1302 thermal shock cracks were affected by the combined effects of stress and oxidation,and the cracks mainly propagated along the interface between matrix and carbide.With the thermal shock cycle,the formation of harmful phase of MnFe2O4 in the oxide film and the precipitation of(Fe,Cr)_(3)C in the matrix promoted the expansion of thermal shock cracks.At 500℃,the hard surface had good high temperature wear performance.The wear at 600℃and 700℃was significantly increased by 1244%and 1596%compared with 500℃.When the wear temperature increased from 500℃to 600℃,the increase of oxidation rate and the formation of harmful phase MnFe_(2)O_(4)were the key factors for the rapid decline of wear performance.Furthermore,the M⇌A structure transformation at 700℃promoted the initiation of fatigue cracks and further accelerated the wear process.

关 键 词：SHM1302硬面层 显微组织 氧化膜 热震抗力 高温磨损 

分 类 号：TG117.1[金属学及工艺—物理冶金]