Method for welding specially-thick high-strength bridge steel plate
A welding method and bridge technology are applied in the welding of low-alloy high-strength steel extra-thick plates, and the welding of extra-thick and high-strength bridge steel plates, which can solve the problems of difficult control of welding deformation of extra-thick plates, low welding efficiency, and easy occurrence of cold cracks. , to avoid reheat embrittlement, improve welding efficiency, and avoid reheat cracks
Inactive Publication Date: 2012-10-24
SHOUGANG CORPORATION
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The invention provides a method for welding a specially-thick high-strength bridge steel plate and belongs to the technical field of specially-thick plate welding. The test plate of the method adopts a symmetric narrow gap U-shaped groove form, is combinedly welded by using two efficient welding methods, namely gas shielded welding for priming and bottom filling, and double-wire submerged arc welding for continuous filling and finishing, so as to achieve the purposes of reducing filling level and giving full play to the efficient double-wire submerged arc welding and high automation degree. The method has strong operability, greatly improves the welding efficiency of the specially-thick bridge steel plate, and significantly reduces manpower cost. Furthermore, by selecting a proper welding sequence, the method solves the problem that the welding deformation of the specially-thick steel plate is hard to control.
Application Domain
Arc welding apparatusWorkpiece edge portions
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Property | Measurement | Unit |
Yield strength | >= 370.0 | MPa |
Tensile strength | >= 510.0 | MPa |
Impact energy | >= 41.0 | J |
tensile | MPa | |
Particle size | Pa | |
strength | 10 |
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