| 点焊热镀锌双相高强度钢的电极磨损规律 |
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| 引用本文： | 张旭强,罗爱辉,张延松,陈关龙.点焊热镀锌双相高强度钢的电极磨损规律[J].焊接学报,2006,27(9):108-112. |
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| 作者姓名： | 张旭强 罗爱辉 张延松 陈关龙 |
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| 作者单位： | 上海交通大学,机械与动力工程学院,上海,200030 |
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| 摘 要： | 热镀锌双相高强度钢是适应汽车轻量化与安全性需要而刚刚发展起来的一种新型板材,强度高,抗腐蚀性能好,但点焊时电极磨损严重,不确定性大,对焊点质量造成很大影响.首先确定了点焊强度为600 MPa的热镀锌双相钢的焊接性范围,然后根据焊接性范围确定焊接工艺参数进行电极磨损试验.研究了电极磨损时的电极表面形貌、轴向磨损、端面直径磨损的变化规律,分析了不同电极磨损阶段的轴向磨损对端面直径磨损的贡献率.结果表明初始焊接阶段电极磨损速率较大,点蚀加剧了电极磨损与失效.
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| 关 键 词： | 电极磨损 双相钢 电阻点焊 |
| 文章编号： | 0253-360X（2006）09-108-05 |
| 收稿时间： | 12 5 2005 12:00AM |
| 修稿时间： | 2005-12-05 |
Characteristics of electrode wear in spot welding of hot galvanized dual-phase high strength steel |
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| ZHANG Xu-qiang,LUO Ai-hui,ZHANG Yan-song and CHEN Guan-long.Characteristics of electrode wear in spot welding of hot galvanized dual-phase high strength steel[J].Transactions of The China Welding Institution,2006,27(9):108-112. |
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| Authors: | ZHANG Xu-qiang LUO Ai-hui ZHANG Yan-song and CHEN Guan-long |
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| Affiliation: | School of Mechanery and Power, Shanghai Jiaotong University, Shanghai 200030, China,School of Mechanery and Power, Shanghai Jiaotong University, Shanghai 200030, China,School of Mechanery and Power, Shanghai Jiaotong University, Shanghai 200030, China and School of Mechanery and Power, Shanghai Jiaotong University, Shanghai 200030, China |
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| Abstract: | Hot galvanized dual-phase high strength steel is a new steel to be used in auto body to meet automobile light-weight and safety requirements.It has high strength and good corrosion resistance,but spot welding of this dual-phase steel has serious and uncertain electrode wear,which has great effect on weld quality.Firstly weld lobe of welding dual-phase steels with 600 MPa strength(DP600) was established by experiment,and then welding parameters according to the weld lobe were determined to carry out electrode wear experiment.Characteristics of electrode face morphology,radial and axial electrode wear were studied during the electrode wear test.Contribution ratios of electrode axis wear on radial wear at different wear stages were analyzed.The results showed that electrode wear rate was higher at beginning welds than later welds;pitting building at electrode surface accelerated electrode wear and invalidation. |
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| Keywords: | electrode wear dual phase steel resistance spot welding |
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