Industrial titanium filter in the welding, want to do a good job in advance of the welding at the argon protection, workers must pay attention to the following operational requirements and their matters: manual argon arc welding, welding wire and welding parts between the minimum angle should be maintained as far as possible (10 ~ 15 °). Welding wire along the front of the molten pool smoothly and evenly fed into the molten pool, must not move the end of the wire out of the argon protection zone. When welding, the torch basically does not swing laterally, and when it needs to swing, the frequency should be low, and the swing amplitude should not be too large to prevent the impact of argon protection. When the arc is broken and the weld is closed, continue to pass argon gas protection until the weld and the heat-affected zone metal cools to below 350°C before the gun is removed.
At the same time the use of titanium wire manual tungsten arc should also pay attention to the following matters: personnel and welders should wear clean white gauze gloves (cotton thread gloves are strictly prohibited). It is strictly forbidden to touch and touch iron objects with hands in the treated welding area. Welding work should be carried out indoors as far as possible, with an ambient wind speed of ≤ 0.5m/s, to avoid being affected by the through wind. Welding should be carried out with as short an arc as possible, with a small welding heat input and with the nozzle at an angle of 70-80 degrees to the weld piece. The butt gap is generally about 0.5mm when positioning the weld on the receiver. When welding, the torch should not swing around and the melting end of the welding wire should not be moved out of the gas protection zone. When welding the arc should be fed in advance, when the arc is extinguished the torch should not be lifted immediately, the supply of gas should be delayed until the temperature drops below 250°C. The distance between the gas shield and torch should be as short as possible and the gap between the torch and the pipe wall should be as small as possible. When carrying out pipe butt welding, in order to achieve the single-sided welding double-sided forming requirements, welding is carried out in two stages: one for bottoming welding (bottoming welding can be done without filler material), and the other for forming welding. When multi-layer welding, you must wait for the previous weld to cool completely before welding the next weld.
