Microstructural evolution of Al-Si coating and its influence on high temperature tribological behavior of ultra-high strength steel against H13 steel

作     者：Meng-xuan Guo Kai-xiang Gao Wu-rong Wang Xi-cheng Wei 

作者机构：School of Materials Science and EngineeringShanghai UniversityShanghai 200072China 

出 版 物：《Journal of Iron and Steel Research International》 (国际钢铁研究杂志)

年 卷 期：2017年第24卷第10期

页      面：1048-1058页

核心收录：

学科分类：080503[工学-材料加工工程] 08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0802[工学-机械工程] 080201[工学-机械制造及其自动化] 

基　　金：the financial support from National Natural Science Foundation of China(Grand No.51475280) 

主　　题：Hot stamping Al-Si coating Ultra-high strength steel Intermetallic compound Diffusion Friction coefficient Adhesive wear 

摘      要：Al-Si coated ultra-high strength steel（UHSS）has been commonly applied in hot stamping *** influence of austenitizing temperature on microstructure of Al-Si coating of UHSS during hot stamping process and its tribological behavior against H13 steel under elevated temperature were simulatively *** austenitizing temperature of Al-Si coated UHSS and its microstructual evolution were confirmed and analyzed by differential scanning calorimetry and scanning electron microscopy.A novel approach to tribological testing by replicating hot stamping process temperature history was *** show that the hard and stable phases Fe_2Al_5＋FeAl_2 formed on Al-Si coating surface after exposure to 930°C for 5 min,which was found to be correlated to the tribological behavior of *** friction coefficient of coated steel was more stable and higher than that of uncoated *** main wear mechanism of Al-Si coated UHSS was adhesion wear,while abrasive wear was dominant for the uncoated UHSS.