22MnB5钢锌基镀层加热过程中组织演变及裂纹形成

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英文篇名：Microstructure evolution and crack formation of Zn based coating on 22MnB5 hot formed steel 作者：崔青玲 ; 李建平 ; 李世宇 ; 乔长乐 英文作者：CUI Qing-ling;LI Jian-ping;LI Shi-yu;QIAO Chang-le;The State Key Lab of Rolling and Automation, Northeastern University; 关键词：热成形钢 ; 锌基镀层 ; 组织演变 ; 液态金属致脆 英文关键词：hot-pressed steel;;zinc coating;;microstructure evolution;;liquid metal embrittlement 中文刊名：IRON 英文刊名：Journal of Iron and Steel Research 机构：东北大学轧制技术及连轧自动化国家重点实验室; 出版日期：2019-02-15 出版单位：钢铁研究学报 年：2019 期：v.31 基金：国家自然科学基金资助项目(51274063) 语种：中文; 页：IRON201902020 页数：6 CN：02 ISSN：11-2133/TF 分类号：142-147

摘要

锌基镀层热冲压技术面临的一个主要问题是液体金属致脆。镀锌钢板在奥氏体化和随后的冷却过程中,基体和镀层之间由于Fe、Zn、Al等元素的扩散以及Zn的溶解、氧化和挥发,镀层的化学成分和微观组织发生一系列变化,不仅影响后续的焊接和抗腐蚀性能,而且影响冲压后裂纹的形成和扩展,因此,了解镀层组织在加热、保温及冷却过程的组织演变是探索裂纹形成和扩展机理的基础。利用试验方法对锌基镀层在加热过程中的组织演变进行研究,并对热成形过程中裂纹形成机理及如何避免裂纹进行探讨。
        Liquid metal embrittlement is one of the main issues the zinc-coated hot-pressed steel facing. During austenization heating and cooling processes, the chemical composition and microstructure of Zn-coated steel plates will dramatically change due to the diffusion of Fe, Zn and Al elements along with the dissolution, oxidation and vapor of Zn, which as a result, will affect the welding property and corrosion resistance, as well as the crack formation and propagation during hot pressing. Thus, to investigate the mechanism of crack formation and propagation, it is necessary to study the microstructure evolution of coatings during the soaking and cooling process. The microstructure of zinc-coated 22 MnB5 during the austenization heating was experimentally investigated, and the mechanisms of crack formation and the approaches of avoiding crack were also discussed.

引文

[1] 杨洪林,刘昕,李俊,等.热冲压钢镀层技术的研究现状[J].钢铁研究学报,2013,25(6):1.(Yang H L,Liu X,Li J,et al.Research status on hot stamping steel coating[J].Journal of Iron and Steel Research,2013,25(6):1.)
    [2] Manzenreiter T,Rosner M.Challenge and advantage in usage of Zinc-coated,press hardened components with tailored properties [J].Berg- und Hüttenm?nnische Monatshefte,2012,157(3):97.
    [3] Karbasian H,Tekkaya A E.A review on hot stamping[J].Journal of Materials Processing Technology,2010,210(15):2103.
    [4] Faderl J,Kolnberger S,Rosner M.Continuous galvanizing meets press hardening[C]//8th International Conference on Zinc and Zinc Alloy Coated Steel Sheet.Genava:Galvatech,2011:1.
    [5] Akioka K,Nishibata T,Imai K.Layer structure and properties of galvannealed steel sheet after hot stamping[C]//8th International Conference on Zinc and Zinc Alloy Coated Steel Sheet.Genava:Galvatech,2011:109.
    [6] Kondratiuk J,Kuhn P,Koyer M.A new coating solution for hot press forming[C] //8th International Conference on Zinc and Zinc Alloy Coated Steel Sheet.Genava:Galvatech,2011:118.
    [7] Ghanbari Z,Speer J,Findley K.Coating evolution and mechanical behavior of Zn-coated press-hardening sheet steel[C]//Hot Sheet Metal Forming of High-Performance Steel CHS2.Toronto:University of Kassel,2015:355.
    [8] Seok H H,Mun J C,Kang C G.Micro-crack in zinc coating layer on boron steel sheet in hot deep drawing process[J].International Journal of Precision Engineering and Manufacturing,2015,16(5):919.
    [9] Kondratiuk J,Kuhn P,Labrenz E,et al.Zinc coatings for hot sheet metal forming:Comparison of phase evolution and microstructure during heat treatment[J].Surface and Coatings Technology,2011,205(17):4141.
    [10] Li J,Yang H,Zhang S,et al.Study of crack generation and propagation mechanism inside zinc-coated press-hardened steel[C] //9th International Conference on Zinc and Zinc Alloy Coated Steel Sheet.Beijing:Galvatech,2013:108.
    [11] Zhu G,Zhang J,Jiang S,et al.Effect of heating process on microstructure of press hardened steel zinc coating[C]//9th International Conference on Zinc and Zinc Alloy Coated Steel Sheet.Beijing:Galvatech,2013:183.
    [12] Lee C W,Fan D W,Al E.Galvanized coating evolution during hot stamping[C]//8th International Conference on Zinc and Zinc Alloy Coated Steel Sheet.Genava:Galvatech,2011:49.
    [13] Huh Y,Shin K S,Park J C,et al.Characterization of the galvanizing behaviors depending on annealing conditions in 22MnB5 steel and the high temperature phase evolution of Zn coatings with hot press forming [C] //9th International Conference on Zinc and Zinc Alloy Coated Steel Sheet.Beijing:Galvatech,2013:274.
    [14] Sohn R,Hwang H,Choi J,et al.Charcteristic comparison for coated HPF steels[C] //Hot Sheet Metal Forming of High -Performance Steel CHS2.Toronto:University of Kassel,2015:95.
    [15] Janik V,Beentjes P,Norman D,et al.Zn diffusion and α-Fe(Zn) layer growth during annealing of Zn-coated B steel[J] Metallurgical and Materials Transactions,2016,47A(1):400.
    [16] Chang W L,Fan D W,Sohn I R,et al.Liquid-metal-induced embrittlement of Zn-coated hot stamping steel[J].Metallurgical and Materials Transactions,2012,43A(13):5122.
    [17] Drillet P,Grigorieva R,Leuillier G,et al.Memorie study of cracks propagation inside the steel on press hardened steel zinc based coatings[J].Metallurgia Italiana,2012,104(1):3.