Ti content on diffusible hydrogen of deposited metal of flux cored wire

The effects of Ti content on diffusible hydrogen escape characteristic of deposited metal of flux cored wire were investigated by adding different quantities of Ti-Fe and in different protecting gas conditions. The results show that the oxidative susceptibility of protecting gas can decrease the diffusible hydrogen of deposited metal, and the grains of Ti and Ti(C, N) which exhibit irreversible hydrogen traps can also decrease the diffusible hydrogen of deposited metal. The rational adding Ti-Fe, which harmonized the oxidative susceptibility of welding atmosphere and formed the irreversible hydrogen traps, could obviously decrease the diffusible hydrogen of deposited metal.