High-strength and high-toughness submerged arc welding wire for deep-sea pipeline welding
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A submerged arc welding wire and pipeline technology, applied in welding medium, welding equipment, welding equipment, etc., can solve the problems of weld fracture, weld center and fusion line Charpy low impact absorption energy, poor impact toughness, etc., to achieve performance Good, good economic and social benefits, the effect of improving mechanical properties
Inactive Publication Date: 2014-10-22
HUBEI KMK WELDING MATERIALS
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[0004] The object of the present invention is to provide a submerged arc welding wire for deep-sea pipelines to improve the low Charpy impact absorption energy of the weld center and the fusion line and the low temperatur
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Embodiment 1
[0017] Example 1: Smelting the high-strength submerged arc welding wire for deep-sea pipeline welding in an electric furnace: C0.04%, Si0.1%, Mn1.6%, Mo0.3%, Ni0.15%, Ti0.04%, B0 .004%, P<0.012%, S<0.003%, the balance being iron. The welding wire is finished by the processes of setting out, shelling, derusting, cleaning, boron coating, drying, drawing, and winding.
Embodiment 2
[0018] Example 2: Smelting the high-strength submerged arc welding wire for deep-sea pipeline welding in an electric furnace: C0.06%, Si0.2%, Mn1.7%, Mo0.4%, Ni0.33%, Ti0.08%, B0 .007%, P<0.012%, S<0.003%, the balance being iron. The welding wire is finished by the processes of setting out, shelling, derusting, cleaning, boron coating, drying, drawing, and winding.
Embodiment 3
[0019] Example 3: Smelting the high-strength submerged arc welding wire for deep-sea pipeline welding in an electric furnace: C0.09%, Si0.3%, Mn1.8%, Mo0.3-0.5%, Ni0.5%, Ti0.12% , B0.01%, P<0.012%, S<0.003%, and the balance is iron. The welding wire is finished by the processes of setting out, shelling, derusting, cleaning, boron coating, drying, drawing, and winding.
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Abstract
Disclosed is a high-strength and high-toughness submerged arc welding wire for deep-sea pipeline welding. The welding wire is prepared from, by mass, 0.04-0.09% of C, 0.1-0.3% of Si, 1.6-1.8% of Mn, 0.3-0.5% of Mo, 0.15-0.5% of Ni, 0.04-0.12% of Ti, 0.004-0.001% of B, less than 0.012% of P, less than 0.003% of S and the balance ferrum. The welding wire has the advantages of reasonable components and reliable performance. The high-strength and high-toughness submerged arc welding wire for deep-sea pipeline welding belongs to an Mn-Mo-Ti-B alloy system, has the features of multi-component alloy, and can adjust components weld metal and improve mechanical properties of welds. When the welding wire is applied to thick-walled deep-sea pipeline welding, low-temperature impact toughness and low-temperature CTOD (crack tip opening displacement) performance of the welds are good, Charpy impact absorption of the welds and welding lines can meet requirements, and margin is large. The defects of an existing deep-sea pipeline build-up welding material are overcome, and the welding wire has good economic and social benefits.
Description
technical field [0001] The invention relates to a metal welding material, in particular to a high-strength submerged arc welding wire for deep-sea pipeline welding. Background technique [0002] my country has a vast ocean area, which contains very rich marine oil and gas resources. For example, the oil and gas reserves in the South China Sea are equivalent to one-third of my country's total oil and gas resources, which are very important for the development of offshore oil fields. Offshore oil fields generally use submarine pipelines to transport oil and gas and other resources. The working environment of the submarine pipeline is very harsh. It not only bears a large internal pressure, but also withstands the external pressure of seawater and environmental loads such as wind, waves, currents, ice and earthquakes, which cause pipeline translation and vibration. Therefore, the submarine pipeline is required to have the ability to resist large deformation, and the steel pip...
Claims
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