서브머어지드 아크 용접시 Ni이 熔接部에 미치는 機械的性質에 대한 고찰

Effect of Ni Contents on the Mechanical Properties of the Weld Metal in Submerged Arc Welding

I searched for the amount of Ni-adding reach mechanical properties to the welding point of a soft steel plate. Ni have four additions : 0, 1.5, 3, 4.5 and flux was made of weldment in condition being most suitable using MF 38 of the steel goods didn t have an effect of the part of welding point. I examined impact of charpy V notch in extent of -60℃ to -20℃ tensile stress and hardness system in high temperature. I got a conclusion like this through above. 1. The amount of Ni adding were 1.5% with being most suitable in extent of -60℃ to -20℃. 2. The move of Ni amount increase the more of the welding power of surrender. 3. The maximum of ultimate tensile stress is increasing as the amount of Ni and got the maximum of ultimate tensile stress evaluation in 3.0%. 4. It was found that hardness evaluation is a little low in case of the pare of heat effect and increase in the welding point.