In order to obtain titanium plate castings with good repair welding quality, care should be taken during processing.
1. The surface of titanium plate castings for repair welding must be cleaned and dried, and the product is not allowed to be touched directly with hands before it is put into the welding box.
2. The tungsten electrode must not short-circuit with the repair welding components during the repair welding process in order to avoid the electrode breaking and tungsten inclusions in the solder joints.
3. When the area and depth of the repair welding area are relatively large, the remote layer welding should be divided into multiple times, and the next layer of welding can only be performed after the previous layer of welding layer has cooled down. One-time welding is not allowed to avoid deformation of the casting.
4. When the repair welding of the titanium plate is about to end, the current should be gradually reduced to reduce the melting zone. Therefore, it is recommended to use a pulse current to avoid accelerating arc breaking and causing cracks.
5. To prevent cracks or distortion in the welding area of the casting caused by quick cooling, let the casting cool in the box for a while after it is finished. The cooling time depends on the wall thickness of the casting, which is typically 15 to 30 mm.
6. After the product is repaired, it should be annealed or hot isostatic pressed in time, and it should not be left for too long, usually not more than 5 days.
7. The number of times of repair welding of titanium plates cannot exceed the provisions of relevant technical documents.
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