Butt Welding Technology of Tungsten Electrode and Socket Joint Pipe
Butt welding technology of tungsten electrode and socket joint pipe is a form of welding used in pipe welding. The welding surface is a welding surface parallel to the center line of the raw material, and the welding end face should be perpendicular to the center line of the raw material. It is a kind of butt joint welding. The welding quality is directly related to the quality of the welding joint. Therefore, it is very important to understand the welding process of tungsten electrode and socket joint pipe for welding workers. Lets discuss the welding process and process parameters of tungsten electrode and socket joint pipes.
The process of tungsten electrode and socket joint pipe welding:
1. Selection of welding process parameters
Tungsten electrode and socket joint pipe are usually welded with gas shielded arc welding, and argon-arc welding is selected as the best. In selecting the argon-arc welding process parameters, the welding area should be determined according to the main welding area. The welding current should not be too low, which will reduce the welding quality, and the welding current should not be too high, which will affect the molten pool shape and increase the welding spatter. The welding speed should not be too fast, which will increase the heat input of the weld and reduce the porosity. Therefore, in actual operation, the welding parameters should be adjusted reasonably.
2. Preparation before welding
Before welding tungsten electrode and socket joint pipe, the surface of the welding joints should be clean and free from burrs, rust, oxides and other dirt. firstly, clean the surface of the welding joint with a rough cloth. secondly, stitch the two welding joints before welding, use the file to carefully grind the welding edges and remove the burrs and rust on the surface of the welding joint. finally, check the gap between the two welding joints. Generally, the gap should be 0.4-0.8mm.
3. Welding process of tungsten electrode and socket joint pipe
After the preparation of the welding process parameters is completed and the surface of the welding joint is cleaned, the welding can be started. When welding, the welding angle of the welding gun should be 90 degrees perpendicular to the welding surface, and the arc length should not be too short, otherwise the arc ignition and arc extinction will occur frequently. During the welding process, keep the welding gun away from the molten pool, so as to form a smooth and compact welding seam.
4. Post - welding Treatment
After the completion of tungsten electrode and socket joint pipe welding, the role of tungsten electrode and socket joint pipe welding will be affected by the post - welding treatment. If there is a long slag on the welding joint, it should be removed in time, so as not to affect the welding quality of the welding joint. In general, the surface of the welding joint can be polished or ground after welding.
In the welding process of tungsten electrode and socket joint pipe, the selection of welding process parameters, the preparation before welding, the welding process and the post-welding treatment are all important factors that affect the welding quality, and we should pay attention to them in the welding process.
Process parameters for welding of tungsten electrode and socket joint pipe:
1. welding current: 120-160A;
2. welding voltage: 18-20V;
3. welding wire: Φ1.2MM;
4. wire feeding speed: 0.8-1M / min;
5. welding speed: 0.3-0.5M / min;
6. welding gas flow: 20-25L / min;
7. shield gas: argon;
The above are the welding process and process parameters of tungsten electrode and socket joint pipe. The welding quality of the welding joint is directly related to the selection of welding process parameters. Therefore, when welding the tungsten electrode and socket joint pipe, the welding process parameters should be selected reasonably and the welding should be carried out strictly according to the process parameters. Only in this way can the perfect welding quality of tungsten electrode and socket joint pipe be obtained.
