Improving mechanical properties and high-temperature oxidation of press hardened steel by adding Cr and Si

作     者：Rong Zhu Yonggang Yang Baozhong Zhang Borui Zhang Lei Li Yanxin Wu Zhenli Mi Rong Zhu;Yonggang Yang;Baozhong Zhang;Borui Zhang;Lei Li;Yanxin Wu;Zhenli Mi

作者机构：National Engineering Research Center for Advanced Rolling and Intelligent ManufacturingUniversity of Science and Technology BeijingBeijing 102206China Manufacturing Management DepartmentNingbo Iron&Steel Co.Ltd.Ningbo 315800China Hunan Valin Lianyuan Iron and Steel Co.Ltd.Loudi 417009China 

出 版 物：《International Journal of Minerals,Metallurgy and Materials》 (矿物冶金与材料学报（英文版）)

年 卷 期：2024年第31卷第8期

页      面：1865-1875页

核心收录：

学科分类：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）] 

基　　金：The authors gratefully acknowledge the financial support from the National Natural Science Foundation of China(Nos.52274372 and 52201101) the National Key R&D Program of China(No.2021YFB3702404) the Fundamental Research Funds for the Central Universities(No.FRF-TP-22-013A1) 

主　　题：Cr-Si micro-alloyed press hardened steel mechanical properties oxidation resistance amorphous SiO_(2) 

摘      要：This work investigated the effect of Cr and Si on the mechanical properties and oxidation resistance of press hardened *** indicated that the microstructure of the Cr-Si micro-alloyed press hardened steel consisted of lath martensite,M_(23)C_(6)carbides,and retained *** retained austenite and carbides are responsible for the increase in elongation of the micro-alloyed *** addition,after oxidation at 930℃for 5 min,the thickness of the oxide scales on the Cr-Si micro-alloyed press hardened steel is less than 5μm,much thinner than 45.50μm-thick oxide scales on *** oxide scales of the Cr-Si micro-alloyed steel are composed of Fe_(2)O_(3),Fe_(3)O_(4),mixed spinel oxide(FeCr_(2)O_(4)and Fe_(2)SiO_(4)),and amorphous SiO_(2).Adding Cr and Si significantly reduces the thickness of the oxide scales and prevents the generation of the FeO *** to the increase of spinel FeCr_(2)O_(4)and Fe_(2)SiO_(4)phase in the inner oxide scale and the amorphous SiO_(2)close to the substrate,the oxidation resistance of the Cr-Si micro-alloyed press hardened steel is improved.