Effect of High-Temperature Annealing on the Cross-Tension Property of Resistance Spot Welded Medium-Mn Steel

• Autorzy: Zhao Bingge , Wang Yuanfang , Sun Chenyu , Ding Kai , Wu Guanzhi , Wei Tao , Pan Hua , Gao Yulai

Identyfikatory

DOI

10.24425/amm.2022.141054

• Języki publikacji: EN

Abstrakty

EN

As one of the most promising 3rd generation advanced high strength steels (AHSS), medium Mn steels attract much attention because of their exceptional mechanical property and reasonable cost. However, their application in the modern automotive industry is limited by poor weldability. In this study, 7Mn steel was welded by resistance spot welding (RSW), which was followed by high-temperature annealing to increase the cross-tension property. With this effort, enhanced cross-tension strength (CTS) with a partial interfacial fracture (PIF) mode was realized. During the annealing after RSW that produced martensite, austenitization was realized and then evolved into martensite by the following air cooling. This process produced structure homogeneity across the joint. With respect to the RSW joint, martensite remained the dominant structure after annealing while the diffusion of C and Mn solutes was triggered. With the increase of annealing temperature, the diffusion was enhanced, and the grain boundary embrittlement was reduced, leading to higher CTS.

Słowa kluczowe

EN

medium Mn steel; resistance spot welding; cross-tension strength; martensite; fracture

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2022
• Tom: Vol. 67, iss. 4
• Strony: 1293--1298
• Opis fizyczny: Bibliogr. 30 poz., fot., rys., tab., wykr.

Twórcy

autor

Zhao Bingge

• Shanghai University, State Key Laboratory of Advanced Special Steel and Shanghai Key Laboratory of Advanced Ferrometallurgy, 200444, P.R. China
• Shanghai University, School of Materials Science and Engineering, Center for Advanced Solidification Technology (CAST), Shanghai, 200444, P.R.China

• https://orcid.org/0000-0002-1996-418X

autor

Wang Yuanfang

• Shanghai University, State Key Laboratory of Advanced Special Steel and Shanghai Key Laboratory of Advanced Ferrometallurgy, 200444, P.R. China
• Shanghai University, School of Materials Science and Engineering, Center for Advanced Solidification Technology (CAST), Shanghai, 200444, P.R.China

• https://orcid.org/0000-0002-5637-6627

autor

Sun Chenyu

• Shanghai University, State Key Laboratory of Advanced Special Steel and Shanghai Key Laboratory of Advanced Ferrometallurgy, 200444, P.R. China
• Shanghai University, School of Materials Science and Engineering, Center for Advanced Solidification Technology (CAST), Shanghai, 200444, P.R.China

autor

Ding Kai

• Shanghai University, State Key Laboratory of Advanced Special Steel and Shanghai Key Laboratory of Advanced Ferrometallurgy, 200444, P.R. China
• Shanghai University, School of Materials Science and Engineering, Center for Advanced Solidification Technology (CAST), Shanghai, 200444, P.R.China

• https://orcid.org/0000-0002-7744-5791

autor

Wu Guanzhi

• Shanghai University, State Key Laboratory of Advanced Special Steel and Shanghai Key Laboratory of Advanced Ferrometallurgy, 200444, P.R. China
• Shanghai University, School of Materials Science and Engineering, Center for Advanced Solidification Technology (CAST), Shanghai, 200444, P.R.China

• https://orcid.org/0000-0002-7764-5371

autor

Wei Tao

• Shanghai University, State Key Laboratory of Advanced Special Steel and Shanghai Key Laboratory of Advanced Ferrometallurgy, 200444, P.R. China
• Shanghai University, School of Materials Science and Engineering, Center for Advanced Solidification Technology (CAST), Shanghai, 200444, P.R.China

• https://orcid.org/0000-0002-3818-5675

autor

Pan Hua

• State Key Laboratory of Development and Application Technology of Automotive Steels, Shanghai 201900, P.R. China
• Automobile Steel Research Institute, R&D Center, Baoshan Iron & Steel Co., Ltd . Shanghai 201900, P.R. China

• https://orcid.org/0000-0002-0093-0721

autor

Gao Yulai

• Shanghai University, State Key Laboratory of Advanced Special Steel and Shanghai Key Laboratory of Advanced Ferrometallurgy, 200444, P.R. China
• Shanghai University, School of Materials Science and Engineering, Center for Advanced Solidification Technology (CAST), Shanghai, 200444, P.R.China

• https://orcid.org/0000-0001-9732-5490

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Uwagi

1. This work was supported by the National Natural Science Foundation of China (Grant no. U1760102), Independent Research Project of State Key Laboratory of Advanced Special Steel and Shanghai Key Laboratory of Advanced Ferrometallurgy (Shanghai University, Grant no. 19DZ2270200), the State Key Laboratory of Development and Application Technology of Automotive Steels (Baosteel Group, Grant no. Y17ECEQ05Y).

2. Opracowanie rekordu ze środków MEiN, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2022-2023).