| 摘要: |
| 通过建立的电弧形态视觉传感系统以及电流电压波形采集系统研究了镀锌层对铝/镀锌钢板CMT熔-钎焊电弧加热行为的影响.结果表明,小电流焊接时,镀锌层可以作为等离子体阴极,起到稳定电弧的作用,而在无镀锌层条件下,电弧的阴极斑点不停地跳跃,电弧极其不稳;随着焊接电流的增大,在镀锌钢板上焊接时,由于镀锌层的蒸发变得十分剧烈,这种蒸发行为也使得在镀锌钢板上焊接时的电弧的边缘上翘,减小了电弧与工件的接触面积,进而降低了焊接热输入,减小了界面脆性化合物层的厚度. |
| 关键词: 铝 镀锌钢板 熔-钎焊 电弧形态 焊接热输入 |
| DOI： |
| 分类号: |
| 基金项目:哈尔滨工业大学(威海)校研究基金资助项目(HIT(WH)XB200814) |
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| Effect of zinc coating on arc heating behavior for joining Al and zinc coated steel by welding-brazing process |
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ZHANG Hongtao1, FENG Jicai2, HE Peng2, ZHAO Hongyun1
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1.School of Materials Science and Engineering, Harbin Institute of Technology at Weihai, Weihai 264209, China;2.School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
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| Abstract: |
| The effect of the zinc coating on the arc heating behavior was studied by the arc shape visual sensing system and voltage and current collecting system.The results show that the zinc coating can stabilize the arc as the plasma cathode during welding with lower current, but with the rise of the welding current the zinc coating will vaporize acutely, which make the arc edge ascend, and the contact area between the arc and the workpiece is lessened to reduce the heat input, which reduces the thickness of the interfacial brittle compounds. |
| Key words: aluminium zinc coated steel welding-brazing arc shape heat input |
