| 热镀锌高强钢点焊的电极磨损对焊点质量的影响 |
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| 引用本文： | 张旭强,张延松,刘衍聪.热镀锌高强钢点焊的电极磨损对焊点质量的影响[J].焊接学报,2009,30(10):5-8. |
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| 作者姓名： | 张旭强 张延松 刘衍聪 |
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| 作者单位： | 1. 中国石油大学(华东)机电工程学院,山东东营,257061
2. 上海交通大学机械与动力工程学院,上海,200030 |
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| 基金项目： | 国家自然科学基金资助项目 |
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| 摘 要： | 试验研究了热镀锌高强钢点焊的电极磨损规律,同非镀层低碳钢相比,热镀锌高强钢点焊的电极寿命低、点蚀磨损特征变化明显.在此基础上分析电极磨损对焊点质量影响,电极磨损初期阶段,热镀锌高强钢点焊的飞溅严重、焊点表面产生微裂纹程度大,导致焊点质量下降.最后根据电极磨损对焊点微裂纹与熔核直径影响的试验结果,以微裂纹长度不超过0.25 mm的电极端面电流密度为标准,确定电流递增工艺方案,以减小严重电极磨损对焊点质量的影响.
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| 关 键 词： | 电极磨损 热镀锌高强钢 焊点质量 电阻点焊 |
| 收稿时间： | 2008/7/22 0:00:00 |
Effects of electrode wear on weld quality of hot galvanization steel with high strength in resistance spot welding |
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| ZHANG Xuqiang,ZHANG Yansong and LIU Yancong.Effects of electrode wear on weld quality of hot galvanization steel with high strength in resistance spot welding[J].Transactions of The China Welding Institution,2009,30(10):5-8. |
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| Authors: | ZHANG Xuqiang ZHANG Yansong and LIU Yancong |
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| Affiliation: | School of Mechanical Engineering, Petroleum University of China, Dongying 257061, China,School of Mechanical Engineering and Power, Shanghai Jiaotong University, Shanghai 200030, China and School of Mechanical Engineering, Petroleum University of China, Dongying 257061, China |
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| Abstract: | Electrode wear characteristics were studied;the electrode life of uncoated steels was much lower and pitting changed more obviously than that of galvanization steels when welding.The effect of electrode wear on weld quality was studied;the expulsion was serious and more micro-cracks were grown at early electrode wear stage, which decreased weld quality greatly.And then based on the experiment results of effect of electrode wear on weld quality, welding technique step-current was established according to the current density that micro-crack degree was less than 0.25 mm to reduce the effect of electrode wear on weld quality. |
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| Keywords: | electrode wear hot galvanization steel with high strength weld quality resistance spot welding |
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