About high strength and heat resistant steel submerged arc welding wire H08MnMoA, there are some precautions when welding.
1.Before using welding flux, must be 300-350 ℃ baking for one hour, wire should be drying, no oil, no rust state before using.
2.Welding parts must be completely removed oil, rust, moisture and other surface impurities.
3.Current requirements are DC + (DC reverse)
4.Recommended to small and medium-sized multi-layer multi-channel welding, preheating and inter-channel temperature control at 150 ± 15 ℃, line energy to 20-30KJ / cm is appropriate.
5.After the welding to eliminate stress should be applied to 620 ± 15 ℃ × 1h after the heat treatment.
