Pre-heating involves the heating of the base metal either in its entirety or just the region surrounding the joint. We then set a specific desired temperature called the preheat temperature before the welding is announced. Additional heating may be continued during the welding process.
Benefits of Resistance Weld Pre-Heat?
- Reduces levels of thermal stress
- Minimizes the rate of weld hardening
- Improves microstructure of heat affected zone
