Effect of Activating Fluxes on Stainless Steel TIG Welding
The effects of activating fluxes(TiO2,Cr2O3,B2O3,SiO2,CaF2) on stainless steel 1Cr18Ni9Ti TIG welding were studied.The results show that all five activating fluxes can deepen the welding penetration.CaF2 hardly has effect on penetration,however,SiO2,Cr2O3,B2O3 can remarkably increase penetration.The five activating fluxes can increase arc voltage.Welding penetration increases due to the increase of the effective power input,however the microstructure of the weld is mainly made up of columnar crystals and dendrites.