全面系统地介绍了脉冲熔化极气体保护焊的各种控制方式，并明确地把它们分为两类：参数控制和熔滴过渡精确控制。
This article introduces all kind of control method of pulse melting pole in gas protection welding, and divided them into two kind: parameter control and melt dripping transition accurate control.
主要介绍了目前等离子—熔化极气体保护焊在采用不同的电极连接形式下，不同的电弧形态和熔滴过渡方式，以及电弧成分组成和温度分布；
This paper mainly introduces the different arc shapes, metal transfer modes, compositions of arc and temperature distribution in plasma-GMAW with different electrode connection forms at present;
采用熔化极惰性气体保护堆焊方式，在阀体密封面上均匀地熔敷镍基合金的耐磨焊层，从而达到改善阀体密封面的表面质量，显著延长阀体寿命的目的。
Using the MIG surfacing method, Ni-alloy was deposited evenly on the sealing face of valve to enhance the performance and prolong the life of the valve.
焊接过程中合适的保护气体及其送气方式也是十分必要的。大量试验表明，激光功率密度、焊接速度、脉冲宽度和脉冲频率四个参数的合理组合是实现不锈钢薄板焊接的关键因素。
The results show that the rational combination of welding parameters such as the laser power density, the welding speed, the pulse frequency and pulse width influence the quality of the weld beam.
焊接过程中合适的保护气体及其送气方式也是十分必要的。大量试验表明，激光功率密度、焊接速度、脉冲宽度和脉冲频率四个参数的合理组合是实现不锈钢薄板焊接的关键因素。
The results show that the rational combination of welding parameters such as the laser power density, the welding speed, the pulse frequency and pulse width influence the quality of the weld beam.
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