Welding method for Q460 high-strength steel tube of extra-high-voltage power transmission steel tube tower
A welding method and technology for power transmission steel, applied in welding equipment, arc welding equipment, tubular objects, etc., can solve the problems of low production efficiency, difficulty in large-scale production of high-strength steel pipes, etc., and achieve fast welding speed, excellent mechanical properties, energy high density effect
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Embodiment 1
[0033] (1) Select Nb micro-alloying controlled rolling Q460 low-alloy high-strength steel, and the thickness of the steel plate is 12mm. The machining groove angle is 30°, the blunt edge is 2mm, and the groove gap is 2mm.
[0034] (2) The ambient temperature during welding is 20°C, without preheating before welding, and the interlayer temperature is controlled at 100-300°C.
[0035] (3) JM68 welding wire with a diameter of 1.2mm is used for bottom welding, CO 2 Continuous gas shielded welding, welding current is 160A, voltage is 21V, welding speed is 0.002m / s, welding line energy is 16.8KJ / cm, and one layer is welded by backing welding.
[0036] (4) Choose CHW-S9 submerged arc welding wire, SJ101 flux, submerged arc automatic welding and continuous welding to complete filling and cover welding, choose welding wire with a diameter of 3.2mm, welding current 600A, welding voltage 33V, welding speed 0.006m / s, welding The line energy is 33KJ / cm, and the number of welding layers i...
Embodiment 2
[0040] (1) Select Nb micro-alloying controlled rolling Q460 low-alloy high-strength steel, and the thickness of the steel plate is 12mm. The machining groove angle is 30°, the blunt edge is 2mm, and the groove gap is 2mm.
[0041] (2) The ambient temperature during welding is 20°C, without preheating before welding, and the interlayer temperature is controlled at 100-300°C.
[0042] (3) JM68 welding wire with a diameter of 1.2mm is used for bottom welding, CO 2Continuous gas shielded welding, welding current is 200A, voltage is 25V, welding speed is 0.003m / s, welding line energy is 16.7KJ / cm, and one layer is welded by backing welding.
[0043] (4) Choose CHW-S9 submerged arc welding wire, SJ101 flux, submerged arc automatic welding and continuous welding to complete filling and cover welding, choose welding wire with a diameter of 3.2mm, welding current 650A, welding voltage 34V, welding speed 0.008m / s, welding The line energy is 27.6KJ / cm, and the number of welding layers ...
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