热浸镀锌对Nb-Ti微合金化S550GD+Z钢力学性能的影响

doi:10.13251/j.issn.0254-6051.2024.07.013

金属热处理 ›› 2024, Vol. 49 ›› Issue (7): 84-90.DOI: 10.13251/j.issn.0254-6051.2024.07.013

热浸镀锌对Nb-Ti微合金化S550GD+Z钢力学性能的影响

刘安奇¹, 亓海全¹, 郭春成¹, 王为民¹, 薛启河², 李文通¹, 万宇¹, 笪仲钟¹

1.桂林理工大学材料科学与工程学院, 广西桂林 541000;
2.河钢股份有限公司承德分公司, 河北承德 067000

收稿日期:2024-01-22 修回日期:2024-04-24 出版日期:2024-07-25 发布日期:2024-08-29
通讯作者: 亓海全,副教授,博士,E-mail: alexander_qi@163.com
作者简介:刘安奇(1995—),男,硕士,主要研究方向为金属材料,E-mail:misulaq@sina.com。

Effect of hot-dip galvanizing on mechanical properties of Nb-Ti microalloyed S550GD+Z steel

Liu Anqi¹, Qi Haiquan¹, Guo Chuncheng¹, Wang Weimin¹, Xue Qihe², Li Wentong¹, Wan Yu¹, Da Zhongzhong¹

1. School of Materials Science and Engineering, Guilin University of Technology, Guilin Guangxi 541000, China;
2. Chengde Branch, Hebei Iron Co., Ltd., Chengde Hebei 067000, China

Received:2024-01-22 Revised:2024-04-24 Online:2024-07-25 Published:2024-08-29

摘要/Abstract

摘要： 采用TEM、EBSD、物理化学相分析等技术分别对Nb-Ti微合金化S550GD+Z钢热轧板及热浸镀锌板的显微组织、析出相和强化机理进行分析,研究了微合金钢板镀锌后强度提升的机理。结果表明:拉伸测试得出镀锌板较热轧板的屈服强度提升约34.6 MPa,其中锌层强度增量贡献约15 MPa;通过计算得出镀锌板较热轧板的固溶强化增量、细晶强化增量、位错强化增量、析出强化增量、锌层强度增量提供的综合强度提升约47.8 MPa。锌层强度增量是Nb-Ti微合金化S550GD+Z钢板镀锌后强度提升的主要原因。

关键词: 热浸镀锌, 显微组织, Nb-Ti微合金化, 强化机理, 析出

Abstract: Microstructure, precipitated phase and reinforcement mechanism of the Nb-Ti microalloyed S550GD+Z hot-rolled steel plate and hot-dip galvanized plate were analyzed by using TEM, EBSD, physical and micro-chemical phase analysis, and the mechanism of strength improvement of the plate by galvanizing was studied. The tensile test results show that the yield strength of the galvanized plate is increased by about 34.6 MPa compared with the hot rolled plate, of which the strength increment of the zinc layer contributes about 15 MPa, while the calculation shows that the comprehensive increment of strength caused by solution treatment strengthening, grain refinement strengthening, dislocation strengthening and the zinc layer strength increment is increased by about 47.8 MPa. Thus, the strength increment of zinc layer is the main reason for the strength improvement of the Nb-Ti microalloyed S550GD+Z steel plate after galvanizing.

Key words: hot-dip galvanizing, microstructure, Nb-Ti microalloying, strengthening mechanism, precipitation

中图分类号:

TG174.4

刘安奇, 亓海全, 郭春成, 王为民, 薛启河, 李文通, 万宇, 笪仲钟. 热浸镀锌对Nb-Ti微合金化S550GD+Z钢力学性能的影响[J]. 金属热处理, 2024, 49(7): 84-90.

Liu Anqi, Qi Haiquan, Guo Chuncheng, Wang Weimin, Xue Qihe, Li Wentong, Wan Yu, Da Zhongzhong. Effect of hot-dip galvanizing on mechanical properties of Nb-Ti microalloyed S550GD+Z steel[J]. Heat Treatment of Metals, 2024, 49(7): 84-90.

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热浸镀锌对Nb-Ti微合金化S550GD+Z钢力学性能的影响

Effect of hot-dip galvanizing on mechanical properties of Nb-Ti microalloyed S550GD+Z steel

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