Characterization of the Trace Phosphorus Segregation and Mechanical Properties of Dual-Phase Steels

作     者：Jing Wang Wei Li Xiaodong Zhu Li You Laiqi Zhang Jing Wang;Wei Li;Xiaodong Zhu;Li You;Laiqi Zhang

作者机构：State Key Laboratory for Advanced Metals and MaterialsUniversity of Science and Technology BeijingBeijing 100083China School of Materials Science and EngineeringUniversity of Shanghai for Science and TechnologyShanghai 200093China Research InstituteBaoshan Iron&Steel Co.LtdShanghai 201999China State Key Laboratory of Development and Application Technology of Automotive Steels(Baosteel)Shanghai 201999China 

出 版 物：《Acta Metallurgica Sinica(English Letters)》 (金属学报（英文版）)

年 卷 期：2022年第35卷第2期

页      面：341-352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：financially supported by the National Natural Science Foundation of China(Nos.51871012,52071021) the Fundamental Research Funds for the Central Universities(No.FRF-GF-20-20B) 

主　　题：Phosphorus Segregation Carbide Mechanical properties Atom probe tomography Dual-phase steels 

摘      要：The segregation behavior of trace amount of phosphorus(P)and the mechanical properties of dual-phase(DP)steels have been systematically *** microstructure of DP steels is mainly composed of martensite,ferrite and nanoscale *** the DP steels with diff erent trace amounts of P(≤0.015 wt%),P has almost no effect on the mechanical *** probe technology(APT)analyses confirm that P segregation was only found at the precipitate/matrix ***,the precipitates of(Ti,Mo)C are widely distributed in the ferrite,martensite and ferrite/martensite interface *** special segregation feature of P would not concentrate at specific regions such as ferrite/martensite interface and/or martensite lath interface,which reveals that trace amounts of P(≤0.015 wt%)have almost no effect on the mechanical properties of DP *** is proved for the first time that the MC-type carbides of(Ti,Mo)C can reduce or eliminate the damage effect of P on the mechanical properties of steels,which provides a new way for the design of alloys to reduce P *** work will promote to increase the P content control standard in DP steels from 0.01 to 0.015 wt%,which will not change the mechanical properties,but greatly reduce the scrap rate and increase the energy e fficiency of the manufacturing process.