Cutting properties of water vapor plasma arc on 7A52 aluminum alloy plate

7A52 aluminum alloy was cut with an integrated equipment for welding and cutting using water vapor plasma arc. Various cutting mediums were tested. The arc force, electron density and cutting speed in each medium were tested and calculated. The fractography and microstructure of the cuts were also analyzed. Results show that the arc force, electron density and cutting speed #wreased with increasing acetone concentration. However, above a certain value （40%）, higher acetone concentrations contribute little to the arc force and cutting speed. The microstrueture of material near the cut was greatly influenced by the water vapor plasma arc. While the microstructure of the material beyond 10 mm from the cut was hardly influenced by the cutting heat. It was demonstrated that the water vapor plasma arc can be used for cutting of aluminum alloys in open field or emergency situations.

水蒸气等离子弧电极烧损机理的研究

从电弧机理和实验分析的角度对水蒸气等离子弧电极烧损机理进行了探讨,并在深入分析电极烧损机理的基础上,提出了一种能有效提高电极寿命的方法,从而为水蒸气等离子弧的应用开辟了新的途径。

水蒸气等离子弧光谱诊断系统的研制

从水蒸气等离子弧光谱诊断原理及水蒸气等离子弧自身特点出发 ,研制了一套水蒸气等离子弧光谱诊断系统 ,并采用该系统对水蒸气等离子弧进行光谱诊断。在对诊断结果进行误差分析和估计后 ,表明该系统能可靠地对水蒸气等离子弧光谱进行诊断 。

水蒸气等离子弧的光谱诊断

借助自行研制的光谱诊断系统可以对水蒸气等离子弧温度和成分进行光谱诊断,以诊断结果为依据,并根据局部热力学平衡状态列出方程,进而探讨水蒸气等离子弧电弧机理与特性。通过对具有高氢高氧高焓特征的水蒸气等离子弧的研究,丰富了电弧物理理论,并对水蒸气等离子弧电弧的应用前景具有指导意义。