细丝大电流MAG焊的熔滴过渡机制
Mechanics of drop transfer for high-current density MAG welding process
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摘要: 借助高速摄像分析了两种常规混合气体(80%Ar+20%CO2和98%Ar+2%O2)保护的细丝大电流MAG焊的基本特点,研究了焊丝伸出长度和保护气体成分对第二临界电流的影响规律,揭示了细丝大电流MAG焊的熔滴过渡机制.同时详细地分析了离心破断过渡、混合过渡和旋转短路过渡的产生条件和形成过程.并指出了80%Ar+20%CO2气体保护的细丝大电流MAG焊之所以无法应用的根本所在,从而确立了98%Ar+2%O2气体保护的细丝大电流MAG焊实现高效化焊接的可行性.
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关键词:
- 细丝大电流活性气体保护焊 /
- 第二临界电流 /
- 离心破断过渡 /
- 旋转短路过渡
Abstract: With the help of high-speed camera, the fundamental character of high current density MAG welding process with two types of conventional shielded gas is analyzed.The influence of wire extension and shielded gas component on the second critical current is researched.So the mechanics of drop transfer of high-current density MAG welding process is disclosed, which is centrifugally breaking transfer, mixed transfer and rotating short transfer.Moreover, the reason of why high-current density MAG welding process with the shielded gas of 80%Ar and 20% CO2 cannot be used is found.The application practicability of high effective welding for high-current density MAG welding process with the shielded gas of 98%Ar and 2% O2 is built. -
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期刊类型引用(5)
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百度学术
2. 陈芙蓉，贾翠玲. 7A52铝合金焊接及其接头表面纳米化研究现状. 华东交通大学学报. 2019(01): 1-11 . 百度学术
3. 解瑞军，陈芙蓉，唐大富，陈超. 超声冲击对7A52铝合金焊接接头疲劳性能的影响. 焊接学报. 2017(06): 56-60+131 . 本站查看
4. 岑耀东，陈芙蓉. 超声冲击处理冷轧钢板缝焊接头的疲劳性能. 焊接学报. 2017(06): 115-119+134 . 本站查看
5. 贾翠玲，陈芙蓉. 材料力学参量对焊后超声冲击处理应力应变影响的有限元模拟. 焊接学报. 2016(10): 105-108+135 . 本站查看
其他类型引用(5)
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