| 镀锌薄板TIG拼焊的焊缝组织及成形性能 |
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| 引用本文： | 彭本栋,张建,李云涛,杨立军,刘广达.镀锌薄板TIG拼焊的焊缝组织及成形性能[J].焊接学报,2009,30(12):82-84. |
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| 作者姓名： | 彭本栋 张建 李云涛 杨立军 刘广达 |
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| 作者单位： | 1. 天津理工大学,材料科学与工程学院,天津,300191
2. 天津大学,材料科学与工程学院,天津,300072 |
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| 基金项目： | 天津市科技支撑计划资助项目，天津市应用基础研究计划项目 |
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| 摘 要： | 采用钨极惰性气体焊对镀锌薄板 SGCC 实施等厚拼焊,测试分析了拼焊板焊接接头的金相组织、显微硬度,并对拼焊板和母材试样进行杯突试验.结果表明,在拼焊过程中,母材的散热情况不同会造成焊缝金相组织在靠近母材的局部区域有很大差异.焊缝熔合区组织为粗的片状与块状先共析铁素体沿柱状晶界分布,晶内为魏氏体组织和片状珠光体,热影响区为块状的珠光体和铁素体,导致了焊缝及其热影响区的硬度均高于母材,对拼焊板的整体成形性能产生负面影响;同时,焊缝杯突值较母材有一定程度的降低,揭示其焊缝深冲性能低于母材.Abstract：The microstructure and micro-hardness of welded joint of SGCC by tungsten inert-gas (TIG) welding are studied, and the cupping test of Tailor-welded blank and base metal are studied.The results show that in the welding process, the microstructure of weld will have great diversity at local region closing parent metal because of the different cooling condition of the parent metal. The microstructure of welding fusion zone is massive sheet proeutectoid ferrite distribution along the columnar grain boundaries, intragranular organizations are Widmanstatten and sheet pearlite structure, and the microstructure in HAZ is massive pearlite and ferrite, which make the micro-hardness value of welding seam and HAZ higher than that of base metal and lead negative influence to the formability of Tailorwelded blank. The cupping value of weld seam reduces to some extent compared with that of base metal, which indicates that the formability of weld seam is not good as that of base metal.
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| 关 键 词： | 镀锌薄板 钨极惰性气体焊 微观组织 杯突试验 |
| 收稿时间： | 2008/7/22 0:00:00 |
Formability and microstructure characteristics of galvanized plate by TIG welding |
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| PENG Bendong,ZHANG Jian,LI Yuntao,YANG Lijun and LIU Guangda.Formability and microstructure characteristics of galvanized plate by TIG welding[J].Transactions of The China Welding Institution,2009,30(12):82-84. |
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| Authors: | PENG Bendong ZHANG Jian LI Yuntao YANG Lijun and LIU Guangda |
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| Affiliation: | School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300191, China,School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300191, China,School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300191, China,School of Materials Science and Engineering, Tianjin University, Tianjin 300191, China and School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300191, China |
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| Abstract: | The microstructure and micro-hardness of welded joint of SGCC by tungsten inert-gas (TIG) welding are studied, and the cupping test of Tailor-welded blank and base metal are studied.The results show that in the welding process, the microstructure of weld will have great diversity at local region closing parent metal because of the different cooling condition of the parent metal. The microstructure of welding fusion zone is massive sheet proeutectoid ferrite distribution along the columnar grain boundaries, intragranular organizations are Widmanstatten and sheet pearlite structure, and the microstructure in HAZ is massive pearlite and ferrite, which make the micro-hardness value of welding seam and HAZ higher than that of base metal and lead negative influence to the formability of Tailorwelded blank. The cupping value of weld seam reduces to some extent compared with that of base metal, which indicates that the formability of weld seam is not good as that of base metal. |
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| Keywords: | galvanized sheet TIG welding microstructures cupping test |
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