| HG70钢的焊接性分析 |
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| 引用本文： | 盛光敏,高长益.HG70钢的焊接性分析[J].焊接学报,2004,25(3):117-120. |
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| 作者姓名： | 盛光敏 高长益 |
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| 作者单位： | 1. 重庆大学,材料科学与工程学院,重庆,400044
2. 武汉钢铁公司,武汉,430080 |
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| 摘 要： | 从焊接结合性能和焊接使用性能两方面对HG70钢的焊接性进行了系统地研究。在拘束焊接条件下，采用E6015-DI型焊条，试验钢板的冷裂纹率为零，说明焊接结合性能良好。焊接接头的拉伸、硬度和冲击韧性试验结果表明，粗晶区的硬度高而韧性低，回火区的强度低，细晶区具有良好的综合力学性能。微观组织分析结果表明，焊接接头形成了马氏体、粒状贝氏体、粒状组织等多种形态的组织。结合组织特点及其分布，对焊接接头的力学性能进行了讨论。
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| 关 键 词： | 贝氏体钢 焊接性 微观组织 力学性能 |
| 文章编号： | 0253-360X(2004)03-117-04 |
| 收稿时间： | 2003/8/8 0:00:00 |
Weldability of HGTO steel |
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| SHENG Guang-min and GAO Chang-vi.Weldability of HGTO steel[J].Transactions of The China Welding Institution,2004,25(3):117-120. |
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| Authors: | SHENG Guang-min and GAO Chang-vi |
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| Affiliation: | SHENG Guang-minI,GAO Chang-vi2 |
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| Abstract: | The weldability of HG70 steel, including the joint andusage properties, is investigated. Under the condition of restraint weld-ing, the cold crack rate is zerg, showing an excellent joint property. Theexperimental results of tensile, hardness and impact toughness tests showthat in the coarse-crystalline zone the hardness is high, but the toughnessis low; in the tempered zone the strength is low, and good coordinationbetween the toughness and strength appears in the fine-crystalline zone.The mierostructure in welded joint consists of martensite, granular bainiteand granular structure. The relationship between the properties and themicrostructure is discussed. |
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| Keywords: | bainite steel weldability microstructure mechanicalproperties |
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