Perché lo strato di sovrapposizione di saldatura si stacca dal materiale di base?
IL strato di rivestimento della saldatura is a special alloy layer applied to repair worn or cracked surfaces. È comunemente usato nella produzione e riparazione di macchinari. Tuttavia, se il processo di saldatura non viene gestito correttamente, the overlay may not bond well to the base material. This can cause the surface to peel.
Below are the main causes of this issue and the recommended solutions.
1. Incorrect Material Selection
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Cause: Inappropriate choice of materials.
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Solution: Suitable primer E transition materials should be selected.
2. Excessive Hard Layer Thickness
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Cause: A thick hard layer leads to poor resistenza agli urti.
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Solution: The thickness of the hard layer should be reduced, O impact-resistant materials should be used.
3. High Residual Welding Stress
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Cause: Excess stress remains in the weld area after welding.
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Solution: Utilizzo preheating, slow cooling, tempering, O multi-step stress relief to reduce stress.
4. Workpiece Stress Exceeds Bond Strength
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Cause: During use, IL peak stress on the workpiece is too high.
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Solution: IL bonding hardness should be increased and the peak stress should be reduced.
5. Poor Welding Process
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Cause: Improper welding process can lead to loss of hardness in the overlay.
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Solution: IL welding method should be improved to maintain the quality of the weld.
Riepilogo
Weld overlay is a conveniente E efficient method for surface repair. It is widely used in many industries. To ensure the cladding layer works well, the method should:
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Minimize base material dilution
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Garantire high deposition efficiency
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Produce a durable and well-bonded overlay
High-quality and low-dilution cladding techniques are strongly recommended.
Form: Weld Overlay Peeling – Causes and Solutions
| Problem | Cause | Solution |
|---|---|---|
| Weak bonding to base material | Wrong material selection | Use proper primer and transition materials |
| Surface peeling due to impact | Hard layer too thick | Reduce layer thickness or use impact-resistant materials |
| Cracking or peeling from stress | Excessive welding residual stress | Apply preheat, slow cooling, and tempering |
| Peeling under use conditions | Peak working stress too high | Increase bonding hardness and reduce work stress |
| Loss of weld hardness | Incorrect welding process | Improve the welding technique |
