| 铸造镁合金A-TIG补焊工艺分析 |
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| 引用本文： | 张兆栋,杨俊慧,宋刚,王吉宁.铸造镁合金A-TIG补焊工艺分析[J].焊接学报,2017,38(3):87-90. |
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| 作者姓名： | 张兆栋 杨俊慧 宋刚 王吉宁 |
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| 作者单位： | 大连理工大学 辽宁省先进连接技术重点实验室, 大连 116024 |
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| 基金项目： | 新世纪优秀人才支持计划资助项目，辽宁省高等学校优秀人才支持计划资助项目 |
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| 摘 要： | 文中研究了TIG、A-TIG焊接方法对铸件焊缝熔深和缺陷的影响规律，并完成模拟铸件孔洞类缺陷的补焊试验.结果表明，在TIG与A-TIG对不同尺寸孔洞愈合的试验中，在相同的焊接参数条件下，A-TIG愈合孔洞的深度明显高于TIG，且焊缝中无焊接缺陷；在相同的补焊熔深条件下，TIG焊接电流远大于A-TIG，同时出现热影响区（HAZ）组织恶化，焊接缺陷产生.分析表明，A-TIG补焊工艺性能优于TIG补焊工艺性能主要是由于活性剂与电弧、熔池的相互作用导致.
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| 关 键 词： | 铸造镁合金 A-TIG 补焊 缺陷 |
| 收稿时间： | 2015/3/9 0:00:00 |
Study on A-TIG repair welding for the cast magnesium alloy |
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| ZHANG Zhaodong,YANG Junhui,SONG Gang and WANG Jining.Study on A-TIG repair welding for the cast magnesium alloy[J].Transactions of The China Welding Institution,2017,38(3):87-90. |
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| Authors: | ZHANG Zhaodong YANG Junhui SONG Gang and WANG Jining |
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| Affiliation: | Key Laboratory of Liaoning Advanced Welding and Joining Technology, Dalian University of Technology, Dalian 116023, China |
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| Abstract: | The effect of the weld technology of TIG and A-TIG on the penetration and welding defects was carried out by the simulation experiments of repairing hole defects. Based on the results of hole healing with different size, it was shown that at the same welding parameters the depth of healing holes in A-TIG process was obviously higher than that of TIG,and the welding induced porosity defect was less. Under the condition with the same depth of welding,the required TIG welding current was much larger than that of A-TIG, meanwhile the heat-affected zone (HAZ) microstructures was deteriorated and the welding defects was generated. The analysis revealed that A-TIG repair welding processing is better than that of TIG because of the interaction between activating fluxes and arcas well as the molten pool. |
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| Keywords: | cast magnesium alloy A-TIG repair welding defects |
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