What is a Melt Through in Welding?
Melt through is a type of visible root reinforcement produced in a joint welded from one side. It occurs when the heat input is too high and the molten pool penetrates through the thickness of the plate, resulting in an opening at the back of the weld. This can lead to welding defects such as porosity and lack of fusion. Melt-through is more likely to occur in thicker materials, or when welding with a high power density electrode. To avoid this, it is important to use the correct welding parameters and to keep the heat input low. If you suspect that a melt-through has occurred, it is important to inspect the weld area carefully before continuing with welding.
Why am I burning through when welding?
There are several reasons why you may be burning through when welding:
- The power setting is too high.
- The travel speed is too fast.
- The electrode is the wrong size.
- The electrode is not pointing in the right direction.
If you are burning through, it is important to reduce the power and/or travel speed and to check that the electrode is the correct size and pointing in the right direction.
What are the consequences of a melt through?
If a melt-through occurs, it can lead to welding defects such as porosity and lack of fusion. This can cause the weld to be weaker and more likely to fail. In some cases, it may also be necessary to repair the weld.
How do you prevent burn through in welding?
There are several ways to avoid a melt through:
- Use the correct welding parameters.
- Keep the heat input low.
- Inspect the weld area carefully before continuing with welding.
If you suspect that a melt through has occurred, it is important to stop welding and inspect the weld area carefully.
Related Links
Melt-Through | American Welding Society Education Online
What is the differences between melt through and blow throug
Melt-through | Article about melt-through
Related Videos
5000 Amp Fuse + Tools Melt With High Current
Melt-Through Simulation Created by Japan's METI Well Before Fukushima
-
5000 Amp Fuse + Tools Melt With High Current
-
Melt-Through Simulation Created by Japan's METI Well Before Fukushima