| 冷轧钢板HAZ组织性能对轮辋折纹缺陷的影响 |
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| 引用本文： | 宋立秋,程兴德,杨金成. 冷轧钢板HAZ组织性能对轮辋折纹缺陷的影响[J]. 钢铁, 2001, 36(8): 39-42 |
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| 作者姓名： | 宋立秋 程兴德 杨金成 |
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| 作者单位： | 攀枝花钢铁集团公司 |
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| 摘 要： | 研究了二种不同成分（钢A和钢B）的冷轧低碳钢板闪光焊焊接热影响区（HZA）,各区段的显微组织、性能及其对汽车轮辋焊后产生折纹缺陷的影响,结果表明,碳当量较低的冷轧钢板（钢A）产生了折纹缺陷,钢A顶锻时间较纹B长,引起钢A产生软化现象,发生软化的过热区宽度较宽,使焊接HAZ的显微硬度。与线材相比降低幅度较大, 软化区宽度增大,软化区所受“约束强化”作用降低,当焊后进行机械冲孔时,引起HAZ软化产生折纹缺陷。
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| 关 键 词： | 显微组织 显微硬度 HAZ宽度 HAZ软化 折纹缺陷 冷轧钢板 汽车车轮 |
EFFECTS OF HAZ MICROSTRUCTURE OF COLD ROLLED STEEL SHEETS ON LINE DEFECT |
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| SONG Liqiu CHENG Xingde YANG Jincheng. EFFECTS OF HAZ MICROSTRUCTURE OF COLD ROLLED STEEL SHEETS ON LINE DEFECT[J]. Iron & Steel, 2001, 36(8): 39-42 |
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| Authors: | SONG Liqiu CHENG Xingde YANG Jincheng |
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| Affiliation: | SONG Liqiu CHENG Xingde YANG Jincheng (Panzhihua Iron and Steel (Group) Corp ) |
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| Abstract: | Microstructure of weld heat affected zone(HAZ)of low carbon cold rolled sheets of two composition (steel A and steel B)and its effect on line defect has been investigated in this paper The experimental results show that the line defect is observed in cold rolled sheets of lower carbon equivalent It is because that compared with steel B,steel A have longer upsetting time with same welding procedure making HAZ softer and wider in contrast to base metal Therefore,effect of "restrictive strengthening"is reduced HAZ soften region causes line defect when it is machined after welding |
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| Keywords: | microstructure micro hardness HAZ width HAZ soften line defect |
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