氧元素和硫元素对熔池影响的数值模拟  

Effect of Oxygen and Sulfur Element on Welding Pool Based on Numerical Simulation

作　　者：陈文骐 蒋渝[1] 袁忠宇[2] 

机构地区：[1]四川大学材料科学与工程学院,四川成都610065 [2]眉山市人民医院,四川眉山620000

出　　处：《热加工工艺》2015年第5期233-235,共3页Hot Working Technology

摘　　要：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。A mathematical model was developed to calculate the transient temperature and velocity distributions in gas tungsten arc （GTA） weld pool of 304 stainless steels with different sulfur and oxygen concentration. The analog results indicate that oxygen and sulfur, elements change the surface tension of the weld pool ,which can consquently affect the weld shape by increasing the weld penetration. At a low level （50 ppm）, the weld pool with sulfur has greater penetration than that with the same oxygen concentration. When the content is high （150 ppm）, no difference is observed between the pools. No change is detected when the oxygen or sulfur content amounts is more than 200 ppm.

关 键 词：熔池模拟 熔化金属流体 元素含量 表面张力 

分 类 号：TG444.72[金属学及工艺—焊接]