Preventing Hot Cracking in Welding
Hot cracking occurs during solidification when thermal stresses exceed the material's strength at elevated temperatures. Prevention requires controlling cooling rates, minimizing restraint, and selecting appropriate filler metals.
Prevention Strategies
- Control heat input. Use balanced parameters to avoid excessive heat buildup and rapid cooling.
- Select appropriate filler. Choose filler metals with lower crack susceptibility for the base material.
- Minimize restraint. Reduce fixturing and allow for thermal expansion during cooling.
- Use proper sequence. Weld in patterns that minimize residual stress accumulation.
Recommended
CRONIGON® 2
Crack ResistantWhy CRONIGON 2 helps prevent cracking: The controlled composition and low hydrogen potential reduce hot cracking susceptibility in stainless steel applications.