热导型等离子弧焊电弧物理特性和熔池动态行为

李子晗, 忻建文, 肖笑, 王欢, 华学明, 吴东升

The Arc Physical Characteristics and Molten Pool Dynamic Behaviors in Conduction Plasma Arc Welding

LI Zihan, XIN Jianwen, XIAO Xiao, WANG Huan, HUA Xueming, WU Dongsheng

表1 SUS304不锈钢主要物性参数

Table 1 Physical properties of SUS304 stainless steel used in this model

Parameter Unit Value Parameter Unit Value Density kg·m-3 6900 Liquidus temperature K 1727 Viscosity kg·m-1·s-1 5.9 × 10-3 Solidus temperature K 1697 Specific heat (liquid state) J·kg-1·K-1 720 Boiling temperature K 3133 Specific heat (solid state) J·kg-1·K-1 760 Heat transfer coefficient W·m-2·K-4 20 Latent heat of fusion J·kg-1 2.47 × 105 Coefficient of thermal expansion K-1 1.5 × 10-4 Thermal conductivity (liquid state) W·m-1·K-1 28.4 Surface tension N·m-1 1.8 Thermal conductivity (solid state) W·m-1·K-1 33.2 Surface tension gradient N·m-1·K-1 -4.3 × 10-4