High-strength and high-toughness automatic submerged arc welding wire with weathering resistance
A submerged arc automatic welding, high-strength technology, used in welding media, manufacturing tools, welding equipment, etc., can solve the problems of large gap in weld toughness, insufficient supporting requirements, and high production costs, and achieve good atmospheric corrosion resistance. Excellent joint performance, excellent performance effect
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Embodiment 1
[0032] The welding wire was smelted in a 0.5-ton electric furnace, rolled and drawn into a welding wire with a diameter of 4 mm and copper-plated surface. The composition of the finished product is: C: 0.06, Si: 0.041, Mn: 1.68, Ni: 0.43, Cr: 0.26, Ti: 0.10, Cu: 0.26, B: 0.0057, Als: 0.009. The rest is Fe and other unavoidable inclusions. Welding metal welding test was carried out with CHF101 flux matching, the welding current was 600A, the welding voltage was 31V, and the welding speed was 35cm / min. Interlayer temperature ≤150°C. Weld metal yield strength ReL = 425MPa, tensile strength Rm = 560MPa, elongation A = 26%, reduction of area Z = 75%. The average impact energy of the weld deposited metal is Akv(20°C)=147J, Akv(-40°C)=107J, Akv(-50°C)=87J, and the weld has excellent strength-toughness matching and low-temperature impact toughness. Meet the supporting welding technical requirements of a new generation of economical high weather resistance steel.
Embodiment 2
[0034]The welding wire was smelted in a 0.5-ton electric furnace, rolled and drawn into a welding wire with a diameter of 4 mm and copper-plated surface. The weight composition of the finished product is: C: 0.07, Si: 0.040, Mn: 1.60, Ni: 0.41, Cr: 0.30, Ti: 0.12, Cu: 0.29, B: 0.006, Als: 0.005. The rest is Fe and other unavoidable inclusions. The welding wire is matched with the CHF101 flux produced by Atlantic Welding Products Co., Ltd. to weld the 20mm thick new generation offshore platform steel WNHS315. The chemical composition of the steel (by weight %) mainly contains C: 0.061, Si: 0.28, Mn: 1.37, Nb: 0.047, Mo: 0.27, P: 0.008, S: 0.005. Rm=510MPa, ReL=316MPa, Akv(-0°C)=268J. The welding process is Y-shaped groove. The blunt edge of the groove is 6mm, the angle of the groove is 35° on one side, the welding process parameters are welding current 650A, welding voltage 31V, and welding speed 35cm / min. The tensile strength of the joint Rm = 505MPa, cold bending d = 3a, ...
Embodiment 3
[0036] The welding wire was smelted in a 0.5-ton electric furnace, rolled and drawn into a welding wire with a diameter of 4 mm and copper-plated surface. The weight chemical composition of its welding wire is: C: 0.09, Si: 0.060, Mn: 1.90, Ni: 0.41, Cr: 0.35, Ti: 0.15, Cu: 0.35, B: 0.009, Als: 0.012. The rest is Fe and other unavoidable inclusions. The welding wire is matched with CHF101 flux, welding 20mm thick offshore platform steel E36, weight chemical composition: C: 0.12, Si: 0.28, Mn: 1.48, Ni(Nb): 0.020, Mo: 0.036, P: 0.008, S: 0.005. Rm=535MPa, ReL=360MPa, Akv(-0°C)=96J. Welding process is identical with embodiment 2. The tensile strength of the joint Rm = 520MPa, cold bending d = 3a, 180° qualified. Welding seam impact energy Akv (0°C) = 144J, Akv (-20°C) = 73J, fusion line impact energy Akv (0°C) = 88J, Akv (-20°C) = 100J, hot shadow zone impact energy Akv (0 ℃) = 95J, Akv (-20 ℃) = 63J, the impact energy of the three zones of the joint has reached a relative...
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