Welding is a common metalworking method that joins two or more metal parts together. However, there are often some defects in the welding process, which may affect the quality and strength of the weld. Therefore, it is very important to avoid common welding defects. This article will describe some common soldering pitfalls and offer some ways to avoid them.

1. Stomata

Porosity is one of the most common defects in the welding process. They form due to failure to expel gases from the weld during welding. Porosity reduces the strength and tightness of the weld and can lead to corrosion and cracks. Ways to avoid blow holes include:

- Use dry consumables and welding surfaces.

- Clean the welding surface before welding to ensure that the surface is free of grease, dirt and moisture.

- Use proper welding current and voltage to ensure that the gas can be completely exhausted during welding.

- Use proper welding speed and welding angle to ensure that the gas can be completely exhausted during welding.

2. Cracks

Cracks are another common defect in the welding process. They are formed due to the stresses and deformations that occur during welding. Cracks reduce the strength and tightness of the weld and can lead to water leakage and corrosion. Ways to avoid cracks include:

- Use proper welding current and voltage to ensure minimal stress and deformation during welding.

- Use proper welding speed and welding angle to ensure that the stress and deformation generated during the welding process are minimized.

- Annealing treatment after welding to reduce stress and deformation during welding.

- Preheat treatment before welding to reduce stress and deformation during welding.

3. Bad weld

Poor welds are another common defect in the welding process. They are formed by failure to fully melt the welding consumables during the welding process. Poor welds reduce the strength and tightness of the weld and can lead to water leakage and corrosion. Ways to avoid poor welds include:

- Use proper welding current and voltage to ensure complete melting of the welding consumables.

- Use proper welding speed and welding angle to ensure that the welding material can be completely melted.

- Clean the welding surface before welding to ensure complete melting of the welding consumables.

- Preheat treatment before welding to ensure that the welding material can be completely melted.

4. Welding deformation

Weld distortion is another common defect in the welding process. They are formed due to the stresses and deformations that occur during welding. Welding distortion affects the tightness and strength of the weld and can lead to cracks and porosity. Ways to avoid welding distortion include:

- Use proper welding current and voltage to ensure minimal stress and deformation during welding.

- Use proper welding speed and welding angle to ensure that the stress and deformation generated during the welding process are minimized.

- Preheat treatment before welding to reduce stress and deformation during welding.

- Annealing treatment after welding to reduce stress and deformation during welding.

In conclusion, it is very important to avoid common welding defects. By using proper welding techniques and methods, the occurrence of welding defects can be minimized. Before welding, the welding surfaces and consumables should be carefully inspected to ensure they are dry, clean and free of grease. During the welding process, proper welding current, voltage, speed and angle should be used to ensure that the stress and deformation generated during the welding process are minimized. After welding, annealing treatment or other appropriate treatment should be carried out to reduce the stress and deformation generated during welding.

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