Hot forming
With warm forming those forming steps are referred to above the recrystallization temperature of a metal take place. The solidification that takes place during the forming process is accompanied by recovery and softening processes that take place during and after the forming step . This enables very high degrees of deformation to be achieved.
Hot forming processes can include:
Comparison of hot and cold forming
| Hot forming | Cold forming |
|---|---|
| Forming above the recrystallization temperature | Forming below the recrystallization temperature |
| Large changes in shape are possible | Minor changes in shape are possible |
| Low forming forces | Higher forces with a comparable degree of deformation |
| Dimensional tolerances and surface quality worse than with cold forming | Close dimensional tolerances are possible |
| Scaled surface | No scaling of the surface |
| Solidification is constantly being broken down | The solidification can be broken down by recrystallization annealing after forming. |
Individual evidence