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Acta Metall Sin  2020, Vol. 56 Issue (4): 411-428    DOI: 10.11900/0412.1961.2019.00381
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A Review of Current State and Prospect of the Manufacturing and Application of Advanced Hot Stamping Automobile Steels
JIN Xuejun1(),GONG Yu1,HAN Xianhong1,DU Hao1,DING Wei1,ZHU Bin2,ZHANG Yisheng2,FENG Yi3,MA Mingtu3,LIANG Bin3,ZHAO Yan3,LI Yong4,ZHENG Jinghua4,SHI Zhusheng4
1.School of Materials Science and Engineering, Shanghai Jiaotong University, Shanghai 200240, China
2.School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
3.China Automotive Engineering Research Institute Co. , Ltd. , Chongqing 401122, China
4.Department of Mechanical Engineering, Imperial College London, London SW7 2AZ, UK
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Abstract  

Ultrahigh strength steels are highly competitive materials for vehicles to concurrently meet the increasing demand of the weight reduction and passenger safety. Hot stamping is the key forming technology to manufacture automobile components with high strength. Hot stamping steel and its manufacturing technology experienced a fast development in the past decade. This paper reviewed the state of the art of the manufacturing and applications of hot stamping steels/components in the following aspects: (1) hot stamping steels (from traditional MnB steels to recently newly developed hot stamping steels); (2) forming technologies (from traditional hot stamping process to industry 4.0 intelligent production); (3) novel hot stamping + quenching & partitioning (Q&P) process and fundamentals of deformation assisted heat treatments; (4) simulation techniques for hot stamping process (modeling of the temperature-stress field, microstructure field and simulation of the manufacturing process); (5) the assessments of in-service performance of hot stamped components. Finally, the trends of the development of hot stamping steels and related forming technologies in the future will be discussed.

Key words:  hot stamping steel      hot stamping technology      hot stamping+Q&P process      modeling      in-service performance     
Received:  11 November 2019     
ZTFLH:  TG142  
Fund: National Natural Science Foundation of China(U1564203);National Natural Science Foundation of China(51901128);National Key Research and Development Program of China(2017YFB0304401);Funds for International Cooperation and Exchange of the National Natural Science Foundation of China(51911530204);The Royal Society International Exchanges Cost Share 2018 China (No.IEC\NSFC\181414), Outstanding Academic Leaders Program of Shanghai(18XD1402200);Startup Fund for Youngman Research at SJTU
Corresponding Authors:  Xuejun JIN     E-mail:  jin@sjtu.edu.cn

Cite this article: 

JIN Xuejun,GONG Yu,HAN Xianhong,DU Hao,DING Wei,ZHU Bin,ZHANG Yisheng,FENG Yi,MA Mingtu,LIANG Bin,ZHAO Yan,LI Yong,ZHENG Jinghua,SHI Zhusheng. A Review of Current State and Prospect of the Manufacturing and Application of Advanced Hot Stamping Automobile Steels. Acta Metall Sin, 2020, 56(4): 411-428.

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https://www.ams.org.cn/EN/10.11900/0412.1961.2019.00381     OR     https://www.ams.org.cn/EN/Y2020/V56/I4/411

Commercial nameSteelmakerCSiMnPSCrTiBFeRef.
USIBOR 1500ArcelorMittal0.220.251.230.0250.0080.20.0370.004Bal.[4]
MBW 1500ThyssenKrupp0.250.41.40.0250.010.50.050.005Bal.[5]
Docol Boron02SSAB0.20~0.250.20~0.351.0~1.30.0190.010.14~0.26-0.005Bal.[6]
HPF1470POSCO0.250.31.40.020.010.250.050.0035Bal.[5]
PH1500Baosteel0.230.251.350.0150.0060.19-0.0032Bal.[7]
AC1500 HSAnsteel0.240.381.270.0140.0040.270.0420.0022Bal.[8]
Table 1  Compositions of 22MnB5 steels produced by different steel companies in the world[4,5,6,7,8]

Steel

Composition (mass fraction / %)

YS

MPa

UTS

MPa

CSiMnCrTiBNNiAlFe
27MnCrB50.250.211.240.340.0420.0020.0040.010.03Bal.10971611
28MnB50.280.401.30--0.005---Bal.11351740
34MnB50.340.401.30--0.005---Bal.12251919
37MnB40.370.310.810.190.0460.0010.0060.020.03Bal.13782040
Table 2  Compositions and mechanical properties after quenching of hot stamping steels with two strength grades of 1800 MPa and 2000 MPa[9,10]
Commercial nameSteelmakerCSiMnPSAlNbFe
Ductibor 500ArcelorMittal0.05~0.08<0.5<1.4<0.03<0.010.02~0.040.03~0.07Bal.
MBW 500ThyssenKrupp<0.10<0.35<1.0<0.03<0.025>0.015<0.1Bal.
PHS-Ultraform 490Voestalpine<0.11<0.5<1.4<0.03<0.025<0.015<0.1Bal.
Table 3  Grades and compositions of low strength high ductility and toughness steels with strength of 500 MPa[9]
Fig.1  Schematics of hot stamping, quenching and partitioning (HS-Q&P) process and microstructural evolution (Ac3—temperature of all ferrite transform into austenite, Ms—onset of temperature of martensitic transformation, γ—austenite, α'—martensite, αs'—second martensite, f—volume fraction of each phase, C—carbon content of each phase)Color online
Fig.2  Schematics of deformation induced ferrite transformation-Q&P (DIFT-Q&P) process and microstructural evolution (Ae3—equilibrium critical temperature of full austenitizationD—deformation-induced martensite, ΔT—the difference of temperature of all ferrite transform into austenite and paraequilibrium temperature)Color online
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