Efficient Welding Process for Transverse Fillet Welding Position of Low Alloy High Strength Steel T-shaped Full Penetration Joint

Abstract

The present invention proposes a welding process for the transverse fillet weld position of a low-alloy high-strength steel T-shaped full-penetration joint, which includes the following steps: Step 1, processing the welding groove at the welding place of the web, and 20mm around the welding groove Clean up the oxide layer and impurities in the range of ‑30mm; step 2, weld the root pass of the front welding groove by matching suitable welding materials and welding parameters; step 3, match the appropriate welding materials and welding parameters on the front welding slope Filling bead welding; step 4, welding the back weld of the welding groove. The invention can realize the welding of T-shaped full-penetration angle joints at the transverse fillet position, can avoid the process of gouging and root cleaning on the back of the weld seam, shorten the production cycle of T-shaped full-penetration angle joints, and reduce the occurrence of gas-gouging groove filling at the same time. The consumption of welding consumables can effectively improve welding efficiency and reduce production costs.

Description

technical field [0001] The invention relates to low-alloy high-strength steel welding technology, in particular to a high-efficiency welding process for the transverse fillet welding position of T-shaped full-penetration joints of low-alloy high-strength steel. Background technique [0002] With the improvement of technical indicators and life expectancy requirements of bridges, tunnels and other buildings, their load-bearing reinforced concrete structures have been gradually replaced by structures designed with high-strength structural steel. The T-shaped full-penetration welded joint is an important welding node in steel structure engineering. Usually, conventional CO2 gas shielded welding or manual electrode arc welding is used for welding. Incomplete penetration welding defects are prone to occur. Therefore, after the root weld and filler bead of the front groove are welded, it is necessary to use gouging to clean the back of the groove, and finally complete the welding ...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the deficiencies of the prior art, the present invention proposes a high-efficiency welding process for the transverse fillet weld position of a low-alloy high-strength steel T-shaped full-penetration joint, which can effectively improve the penetration ability of the root weld bead and solve the problem of unwelded backside of the root bead. The problem of penetration welding defects

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