Electro-gas welding method suitable for steel plate 50-80mm in thickness
A technology of gas-electric vertical welding and thick steel plate, which is applied in the direction of arc welding equipment, welding medium, welding equipment, etc., which can solve the problem of high welding line energy, gas-electric vertical welding that cannot be used in the welding process, tensile performance and impact performance of welded joints Low mechanical properties and other problems, to achieve the effect of reducing welding production costs, shortening groove processing time, and excellent comprehensive mechanical properties
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Embodiment 1
[0019] This embodiment provides a gas-electric vertical welding method suitable for 50-80mm thick steel plate, the structure is as figure 1 shown, including the following specific steps:
[0020] (1) Preparation of welding test plate: yield strength is 428MPa, tensile strength is 590MPa, impact energy Akv>80J at -40°C, test plate size is 400mm (length) × 200mm (width) × 50mm (thickness), welding groove The type adopts double-sided V-shaped grooves, and the double-sided V-shaped grooves are asymmetric double-sided V-shaped grooves. The front groove angle A is 35°, the back groove angle B is 40°, and the front groove depth is t 20mm, no blunt edge is left on the welding groove, and the roughness of the groove processing surface of the welding test plate is Ra25;
[0021] (2) Group the welding test plates, reserve the gap d of the group to be 3mm, use manual arc welding, CO 2 Gas shielded welding or argon arc welding is used to perform tack welding on both ends and the middle o...
Embodiment 2
[0026] This embodiment provides a gas-electric vertical welding method suitable for 50-80mm thick steel plate, the structure is as figure 1 shown, including the following specific steps:
[0027] (1) Preparation of welding test plate: yield strength is 419MPa, tensile strength is 592MPa, impact energy Akv>80J at -40°C, test plate size is 800mm (length) × 200mm (width) × 60mm (thickness), welding groove The type adopts double-sided V-shaped grooves, and the double-sided V-shaped grooves are asymmetric double-sided V-shaped grooves. The front groove angle A is 30°, the back groove angle B is 35°, and the front groove depth is t It is 35mm, no blunt edge is left on the welding groove, and the roughness of the groove processing surface of the welding test plate is Ra25;
[0028] (2) Group the welding test boards, reserve the group gap d as 8mm, use manual arc welding, CO 2 Gas shielded welding or argon arc welding is used to perform tack welding on both ends and the middle of th...
Embodiment 3
[0033] This embodiment provides a gas-electric vertical welding method suitable for 50-80mm thick steel plate, the structure is as figure 1 shown, including the following specific steps:
[0034] (1) Preparation of welding test plate: yield strength is 409MPa, tensile strength is 578MPa, impact energy Akv>80J at -40°C, test plate size is 800mm (length) × 200mm (width) × 80mm (thickness), welding groove The type adopts double-sided V-shaped grooves, and the double-sided V-shaped grooves are asymmetric double-sided V-shaped grooves. The front groove angle A is 25°, the back groove angle B is 30°, and the front groove depth is t 50mm, no blunt edge is left on the welding groove, and the roughness of the groove processing surface of the welding test plate is Ra25;
[0035] (2) Group the welded test plates, reserve the gap d of the group to be 6mm, use manual arc welding, CO 2 Gas shielded welding or argon arc welding is used to perform tack welding on both ends and the middle of...
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Abstract
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