| 埋弧焊线能量对船用E36钢焊缝低温冲击韧性的影响 |
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| 引用本文： | 曲占元.埋弧焊线能量对船用E36钢焊缝低温冲击韧性的影响[J].材料开发与应用,2010,25(4):7-9. |
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| 作者姓名： | 曲占元 |
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| 作者单位： | 中国船舶重工集团公司第七二五研究所,河南,洛阳,471039 |
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| 摘 要： | 运用金相分析及扫描电镜断口分析的方法,研究了线能量对船用E36钢的埋弧焊焊缝冲击韧性的影响,结果表明,大线能量焊接时,促使焊缝中产生沿奥氏体晶界分布的先共析铁素体,柱状晶明显粗大,断口微观形貌呈解理+准解理特征;线能量降低时促使焊缝中形成以针状铁素体为主的组织,断口微观形貌呈韧窝+准解理特征。焊缝的冲击韧性取决于焊缝中针状铁素体和先共析铁素体所占的比例。对于12mm厚的钢板,线能量最大不能超过32kJ.cm-1。
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| 关 键 词： | 埋弧焊 E36钢 低温韧性 |
Influence of Heat Input on Low Temperature Toughness of Submerged Arc Welding Seam on Marine E36 Steel |
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| QU Zhan-yuan.Influence of Heat Input on Low Temperature Toughness of Submerged Arc Welding Seam on Marine E36 Steel[J].Development and Application of Materials,2010,25(4):7-9. |
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| Authors: | QU Zhan-yuan |
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| Affiliation: | QU Zhan-yuan (Luoyang Ship Material Research Institute,Luoyang 471039,China) |
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| Abstract: | The influence of heat input on low temperature toughness of SAW welding seam of marine E36 steel was investigated through metallographic analysis and SEM fracture analysis.The results showed that pro-eutectoid ferrite austenite inter-granular initiates easily columnar crystals is thicker,fracture pattern exhibits cleavage and quasi-cleavage character.The formation of acicular ferrite is promoted in welded seam when heat input reduces and fracture pattern exhibits quasi-cleavage character.Impact toughness of... |
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| Keywords: | Submerged arc welding E36 steel Low temperature toughness |
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