锻压技术

镀锌层对高强度镀锌薄板力学性能的影响

英文标题：Influence of galvanized layer on mechanical properties of thin high strength steel sheet

作者：裴少伟韩飞

关键词：镀锌板高强度钢力学性能

分类号：TG304

出版年,卷(期):页码：2013,38(4):36-39

摘要：

通过宏观单向拉伸实验和断口微观组织观察，研究分析了镀锌层对G550高强度镀锌薄板力学性能的影响，实验中所使用的试样厚度t分别为0.28，0.39，0.45和0.58 mm，镀层厚度均为50μm左右。结果表明：这种镀锌板在去除镀锌层前后力学性能变化较为明显，尤其是屈服极限、抗拉极限、塑性应变比r、硬化指数n和伸长率δ变化较为明显，而杨氏模量E和泊松比μ几乎无变化；这种镀锌板的屈服极限和抗拉极限均高于裸板，而塑性应变比r、硬化指数n和伸长率δ均小于裸板；相比较于裸板，这种镀锌板的成形性能有一定的下降，后续成形工艺的设计需要考虑镀锌层的存在。

Through tensile test and fracture microscopic observation, the influence of the galvanized layer on the G550 thin high strength galvanized sheet's mechanical properties was researched, the thickness t of the samples were 0.28, 0.39, 0.45 and 0.58mm and the thickness of the galvanized layer was about 50μm in the experiment. The research results show that before and after removed the galvanized layer, the difference of mechanical of the galvanized sheet is obviously, especially the yield limit, ultimate tensile limit, n value, r value and elongation ratio δ, contrary to the Young's modulus E and Poisson's ratio μ. The yield limit and ultimate tensile limit of the galvanized sheet are higher than the bare sheet, contrary to the r value, n value and elongation ratio δ. Compared with the bare sheet, the forming performance of the galvanized sheet has a certain decline, so the subsequent forming process needs to consider the influence of the galvanized layer.

基金项目：

北京市自然科学基金资助项目(3112010)；北京市中青年骨干人才培养计划(PHR20110851)

裴少伟(1987-)，男，硕士研究生

参考文献：

［1］董志洪. 我国镀锌板生产现状与未来发展趋势[J]. 中国金属通报，2009，(20)：13-15. Dong Z H . The galvanized sheet production status and future development trend of China [J].China Metal Bulletin, 2009, (20): 13-15.
［2］邱晓刚，唐静，王飞龙. 锌层对热镀锌钢板成形性的影响[J]. 理化检测:物理分册,2009,(1)：10-12.Qiu X G, Tang J, Wang F L. Influence of zinc coating on forming properties of hot-dip galvanized steel sheet [J]. PTCA: Physical Testing, 2009, (1): 10-12.
［3］蒋浩民，陈新平，俞宁峰. 镀锌钢板的锌层附着特性及成形性研究[J]. 塑性工程学报，2008，15(2)：58-60.Jiang H M, Chen X P, Yu N F. Study on the zinc coating adhesion and formability of zinc-coated sheet steel[J]. Journal of Plasticity Engineering, 2008, 15(2): 58-60.
［4］钱键清. 镀锌层对钢板r值的影响[J]. 钢铁研究学报，2003，(4)：58-60.Qian J Q . Effect of galvanized coating on r-value of sheets [J]. Journal of Iron and Steel Research, 2003, (4): 58-60.
［5］蒋浩民，陈新平，吴华，等. 锌层对镀锌钢板力学性能的影响[J]. 锻压装备与制造技术，2005，(3)：65-66.Jiang H M, Chen X P, Wu H, et al. Effect of zinc coating on the mechanical properties of zinc-coated sheet [J]. China Metal Forming Equipment & Manufacturing Technology, 2005,(3): 65-66.
［6］张笑笑，王雷刚，黄瑶. 镀锌板冲压成形性的模拟与实验研究[J]. 锻压技术，2011,35（6）：19-23.Zhang X X, Wang L G, Huang Y. Simulation and experimental research of galvanized sheet stamping formability [J] . Forging & Stamping Technology ，2011,35(6): 19-23.
［7］贺俊光，周旭东，李俊，等. 影响连续热镀锌镀层粘附性因素的探讨 [J] .钢铁研究，2005，(2)：41-44.He J G, Zhou X D, Li J, et al. Discussion on factors of influencing the adhesion of coating for continuous galvanized strip [J] .Research on Iron & Steel, 2005, (2): 41-44.
［8］周天华，周绪红，何保康. G550级高强薄板钢材的材性及应用[J]. 建筑科学与工程学报，2005，(2)：44-46.Zhou T H, Zhou X H, He B K. Application and material properties of grade G550 high strength steel thin-plate [J]. Journal of Architecture and Civil Engineering, 2005, (2): 44-46.
［9］GB/T 5028-1999，金属薄板和薄带拉伸应变硬化指数(n值)试验方法[S].GBT 5028-1999, Metallic materials-sheet and strip-determination of tensile strain hardening exponent (n-values) [S].
［10］李红英. 金属拉伸试样的断口分析[J]. 山西大同大学学报：自然科学版，2011， 27(1)：76-79.Li H Y. Fracture analysis of the metal tensile specimen [J]. Journal of Shanxi Datong University: Natural Science Edition, 2011, 27(1): 76-79.
［11］Amit Kumar Gupta, Ravi Kumar D. Formability of galvanized interstitial-free steel sheets[J]. Journal of Materials Processing Technology, 2006, (172): 225-237.
［12］Hua-chu Shih, Paul J Belanger. Effects of coating and forming condition on friction[A]. Galvatech 04 Conference Proceedings[C]. Chicago, 2004.

服务与反馈：

【本网站尚未开通全文下载服务】【加入收藏】