是否可以用含有较少氦气的混合气体,以得到较大的熔深呢?为此,我们对氦氩混合气体TIG焊的热功率分布及熔深进行了试验。在热功率分布试验中,氦氩混合气体保护下的电弧是在水冷铈钨极和水冷铜块间点燃,在热平衡以后,根据冷却水带走的热量来计算阴极区和阳极区的热功率。熔深试验是在厚度为3毫米的不锈钢板上进行自动焊接。热功率分布试验 Is it possible to use a mixture gas containing less helium to obtain a larger penetration depth? For this reason, we have conducted experiments on the thermal power distribution and penetration depth of TIG welding of helium-argon mixed gas. In the thermal power distribution test, the arc under the helium-argon mixed gas is ignited between a water-cooled cerium tungsten electrode and a water-cooled copper block. After thermal equilibrium, the thermal power of the cathode and anode regions is calculated from the heat taken away by the cooling water. The penetration test was performed on a stainless steel plate with a thickness of 3 mm for automatic welding. Thermal power distribution test