What is a Crater in Welding?
The crater is a depression in the weld face at the termination of a weld bead. It is caused by the collapse of the molten pool and the expulsion of the last portion of filler metal. The crater is usually concave and may be deep or shallow. Crater cracks are initiated at the root of the crater and may propagate along the length of the weld bead.
What causes a crater in welding?
The crater is caused by the collapse of the molten pool and the expulsion of the last portion of filler metal. Crater cracks are initiated at the root of the crater and may propagate along the length of the weld bead.
What is an arc crater?
- An arc crater is a depression in the weld face at the termination of a weld bead.
- It is caused by the collapse of the molten pool and the expulsion of the last portion of filler metal.
- The crater is usually concave and may be deep or shallow.
- Crater cracks are initiated at the root of the crater and may propagate along the length of the weld bead.
How do you stop a crater in welding?
In order to avoid craters, it is necessary to maintain a proper welding technique and travel speed. If craters do occur, they can be removed by grinding or by rewelding over them.
What is crater current in TIG welding?
Crater current is the current used to terminate an arc in TIG welding. It is used to create a crater in the weld pool, which helps to expel the last portion of filler metal and prevent weld defects.
The proper setting of crater current is important in order to avoid weld defects such as porosity and lack of fusion.