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为了探究氧元素和硫元素分别对熔池的影响,建立了数值模型并计算出含有不同的氧和硫的304不锈钢钨极氩弧焊的瞬态温度场及速度场。模拟结果显示,硫元素和氧元素改变了熔池的表面张力,增加熔深进而影响熔池形貌。元素含量较低时(5×10-5),含有硫的熔池深度大大超过含有氧的熔池深度;在高元素含量时(15×10-5),分别含有硫和氧的熔池熔深没有差别。当氧含量或硫含量超过20×10-5时,熔池的形貌将不再发生变化。
In order to explore the impact of oxygen and sulfur on the weld pool respectively, a numerical model was established and the transient temperature field and velocity field of 304 stainless steel TIG welding with different oxygen and sulfur were calculated. The simulation results show that the sulfur and oxygen elements change the surface tension of the weld pool and increase the weld penetration and thus the weld pool morphology. When the element content is low (5 × 10-5), the depth of the molten pool containing sulfur greatly exceeds the depth of the molten pool containing oxygen. At the high elemental content (15 × 10-5), the molten pool containing sulfur and oxygen respectively Deep no difference. When the oxygen content or sulfur content of more than 20 × 10-5, the bath will not change the morphology.