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A special electrode for corrosion-resistant steel welding
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A corrosion-resistant steel and welding rod technology, applied in the direction of welding medium, welding equipment, welding/cutting medium/material, etc., can solve the problems of poor hydrogen sulfide corrosion resistance, insufficient impact toughness, etc., and achieve faster melting speed, not easy to slip, good The effect of high and low temperature resistance
Active Publication Date: 2018-06-29
JIANGSU BINXIN STEEL GRP
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Abstract
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Problems solved by technology
Electrode is an important welding material for steel plate welding. In the process of matching corrosion-resistant steel welding, it is required that the weld metal not only has the characteristics of high strength and high toughness, but also has good resistance to hydrogen sulfide corrosion and seawater corrosion. , and the current matching electrodes have the defects of poor hydrogen sulfide corrosion resistance and insufficient impact toughness
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Embodiment 1
[0018] The composition and content of the core wire are: represented by mass fraction, C 0.065%, Si 0.03%, Mn 0.55%, P0.005%, S 0.005%, Ni 0.30%, Cr 0.15%, Cu 0.02%, Ti 0.20%, Mg 0.05%, the balance is Fe; the composition and content of the coating are: marble 55%, fluorite 10%, silicate 5%, high-carbon ferrochrome 10%, titanium dioxide 10%, nano-aluminum nitride 3% , Mixed rare earth 2%, binder 5%.
[0019] Among them, the ratio of mixed rare earths is: by mass fraction, 15% of yttrium oxide, 60% of cerium oxide, and 25% of lanthanum oxide.
Embodiment 2
[0021] The composition and content of the core wire are: expressed in mass fraction, the composition and content of the core wire are: C0.065%, Si 0.03%, Mn 0.55%, P 0.005%, S 0.005%, Ni 0.20%, Cr 0.15 %, Cu 0.01%, Ti0.10%, Mg 0.03%, and the balance is Fe; the composition and content of the coating are: marble 35%, fluorite 20%, silicate 15%, high-carbon ferrochrome 14%, Titanium dioxide 8%, nano-aluminum nitride 2%, mixed rare earth 3%, binder 3%.
[0022] Among them, the ratio of mixed rare earths is: by mass fraction, 10% of yttrium oxide, 50% of cerium oxide, and 40% of lanthanum oxide.
[0023] In Example 1-2, the composition of the high-carbon ferrochromium is not less than 60% by mass ratio, Cr is not less than 60%, C is 6-10%, Si≤3%, S≤0.01%, P≤0.01%, and the rest The amount is Fe.
[0024] In Example 1-2, the binder was prepared by the following steps: 1) acidifying and purifying the attapulgite powder: adding the attapulgite powder at a mass volume ratio of 1:50 to...
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Abstract
The invention belongs to the technical field of welding, and in particular relates to a welding rod special for corrosion-resisting steel welding. The welding rod comprises a welding core and a coating applied on the welding core, wherein the welding core consists of the following components in percentage: 0.065 percent of C, 0.03 percent of Si, 0.55 percent of Mn, less than or equal to 0.005 percent of P, less than or equal to 0.005 percent of S, less than or equal to 0.30 percent of Ni, 0.15 to 0.18 percent of Cr, less than or equal to 0.02 percent of Cu, less than or equal to 0.20 percent of Ti, less than or equal to 0.05 percent of Mg and the balance of Fe. The welding rod has the technical advantages that due to reasonable formula design, the chromium content of a core wire of the welding rod is optimized; a small number of rare earth elements are added, and impurity elements are controlled; on the basis of ensuring that weld metal has certain intensity and low-temperature impact toughness, the welding rod is high in hydrogen sulfide corrosion and seawater corrosion resistance. An adopted adhesive is better in low and high temperature resistance; core powder is difficult to slide off in a welding process; meanwhile, the melting speed of the core powder can be increased, and normal welding construction can be effectively guaranteed.
Description
technical field [0001] The invention belongs to the technical field of welding, and in particular relates to a special electrode for welding corrosion-resistant steel. Background technique [0002] There are both hydrogen sulfide corrosion and seawater corrosion in oil and gas transportation, so the steel plate is required to have good sulfur corrosion resistance and good seawater corrosion resistance. Electrode is an important welding material for steel plate welding. In the process of matching corrosion-resistant steel welding, it is required that the weld metal not only has the characteristics of high strength and high toughness, but also has good resistance to hydrogen sulfide corrosion and seawater corrosion. , and the current matching electrodes have the defects of poor hydrogen sulfide corrosion resistance and insufficient impact toughness. [0003] Therefore, the development of a special electrode for corrosion-resistant steel welding makes the weld part of the oil ...
Claims
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Application Information
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