热等离子弧对钢表面淬硬深度的影响

有3种连接方式可以用于等离子弧钢的表面淬火工艺：转移弧、非转移弧和联合弧。本文对比了这3种连续方式的等离子弧对钢表面淬硬深度的影响。试验结果表明，转移弧和联合弧的加热效率比较高，可以获得比非转移弧更深的淬硬深度，但小口径的非转移弧或联合弧的电弧燃烧稳定，比较适合用于等离子弧淬火处理。

Study on Hardened Layer Depth of Steel Heated by Thermal Plasma Arc

There were three connection methods of thermal plasma arc,which were transferred arc,non-transferred arc and combined arc.The effects of different connection methods of thermal plasma arc on hardening depth of steel were studied.The experimental results show that transferred arc and combined arc have higher heating efficiency and larger hardening depth compared with non-transferred arc.But the arc stability of the combined arc and non-transferred arc with smaller orifice diameter is higher than that of transferred arc,and they are more suitable for the hardening treatment by plasma arc.