A Study of Weld Cracking in High-Strength Steel Weld with Various Arc Welding Processes for Steel Structures of Building (Report 1)

In case of Manual Covered Metal Arc Welding

Abstract

As the weld length is generally short in the welding of steel structures of building, welding is completed in many cases in continuous multi-pass welding sequence. Consequently, it is expected that the cold weld cracking can be prevented by depositing the succeeding weld passes within the incubation time for crack initiation.
Confirming that the incubation time for cracking is affected by the welding positions, weld heat input, kind of electrode and intensity of restraint, the new method of preventing weld cracking has been established by welding the succeeding passes within the incubation time for crack initiation without employing preheating.