Welding method of chrome-molybdenum vanadium steel for super-thick pressure vessels

Welding method of chrome-molybdenum vanadium steel for super-thick pressure vessels

The invention relates to a welding method of chrome-molybdenum vanadium steel for super-thick pressure vessels, which belongs to the technical field of welding and solves the quality problems of low welding efficiency, high tendency of no fusion, cold cracks, joint embrittlement and the like in the...

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Hauptverfasser: YU LEI, WANG TIANXIAN, KONG FANHONG, LEI CHENGLONG, SHI QINGHAO
Format: Patent
Sprache:eng
Schlagworte:
CLADDING OR PLATING BY SOLDERING OR WELDING
CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING
MACHINE TOOLS
METAL-WORKING NOT OTHERWISE PROVIDED FOR
PERFORMING OPERATIONS
SOLDERING OR UNSOLDERING
TRANSPORTING
WELDING
WORKING BY LASER BEAM
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creator YU LEI
WANG TIANXIAN
KONG FANHONG
LEI CHENGLONG
SHI QINGHAO
description The invention relates to a welding method of chrome-molybdenum vanadium steel for super-thick pressure vessels, which belongs to the technical field of welding and solves the quality problems of low welding efficiency, high tendency of no fusion, cold cracks, joint embrittlement and the like in the welding process in the prior art. The welding method comprises the following steps: (1) processing an abutting end groove, wherein the groove is a single-sided U-shaped groove; (2) abutting two chrome-molybdenum vanadium steel plates to be welded, and fixing by spot welding; (3) carrying out multipass welding from inside to outside by narrow-clearance submerged arc welding; and (4) after reverse back chipping, carrying out arc welding on the corresponding welding rod. The method can be used for welding the high-thickness chrome-molybdenum vanadium steel plates with the welding thickness of at least 100mm, and the welding joint has excellent quality, thereby ensuring all regions of the welding joint to have qualified mechanical properties.
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subjects CLADDING OR PLATING BY SOLDERING OR WELDING
CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING
MACHINE TOOLS
METAL-WORKING NOT OTHERWISE PROVIDED FOR
PERFORMING OPERATIONS
SOLDERING OR UNSOLDERING
TRANSPORTING
WELDING
WORKING BY LASER BEAM
title Welding method of chrome-molybdenum vanadium steel for super-thick pressure vessels
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