Ultra-low hydrogen, anti-moisture absorption welding electrode with seamless flux-cored wire as welding core and preparation method
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A seamless flux-cored welding wire and ultra-low hydrogen technology, applied in welding equipment, manufacturing tools, welding media, etc., can solve the problems of easy moisture absorption, increased hydrogen diffusion of deposited metal, etc., to achieve smooth surface, stable arc, and production The effect of excellent process performance
Active Publication Date: 2021-07-02
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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Arcing agents generally contain K 2 O, Na 2 Easily ionized substances such as O, which are very easy to absorb moisture, adding a large amount will lead to an increase in the diffusion of hydrogen in the deposited metal
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[0044] The utility model relates to an ultra-low hydrogen, moisture-absorption-resistant electric welding electrode whose welding core is a seamless flux-cored wire, including two parts, a welding core and a coating. The welding core adopts the form of seamless flux core, and the skin is ordinary low-carbon steel strip; the flux core is metal powder supplemented with potassium carbonate, potassium titanate and graphite, etc. The components of the drug core and their weight percentages are: metal nickel: 20-26%, metal chromium: 3-5%, metal molybdenum + tungsten: 1-1.5%, graphite: 0.5-1%, potassium carbonate 2-4% %, potassium titanate 1-3%, and the rest is reduced iron powder. The filling rate (the ratio of the flux core to the total weight of the welding core) is 14.5%-15.5%. In order to remove the moisture in potassium carbonate and new potassium titanate, it needs to be baked at 450°C for 1 hour before mixing the powder, and it needs to be kept at 120°C after mixing to avoid...
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Abstract
The invention relates to an ultra-low-hydrogen, moisture-absorption-resistant electric welding electrode whose welding core is a seamless flux-cored wire and a preparation method thereof, belonging to the field of welding materials. The electric welding electrode includes a welding core and a coating; the welding core includes a skin and a coating Core; the components and content of the drug core are: nickel 20‑26%, chromium 3‑5%, molybdenum+tungsten 1‑1.5%, graphite 0.5‑1%, potassium carbonate 2‑4%, potassium titanate 1‑ 3%, the rest is reduced iron powder; the components and contents in the coating are: marble 25‑33%, barium carbonate 10‑16%, fluorite 25‑30%, sodium fluoride 3‑5%, magnesium fluoride 1‑4%, phlogopite 2‑4%, quartz 4‑7%, titanium iron 5‑8%, rare earth ferrosilicon 3‑6%, manganese 2‑4%, CMC 1‑2%. The welding electrode has stable arc, clear molten pool, easy slag removal, extremely low diffusible hydrogen, good moisture absorption resistance and good low-temperature toughness, and can meet the welding requirements of 690MPa grade steel.
Description
technical field [0001] The invention belongs to the technical field of welding materials, and in particular relates to an ultra-low hydrogen, moisture-absorption-resistant welding electrode whose welding core is a seamless flux-cored welding wire and a preparation method thereof. Background technique [0002] With the gradual development of engineering equipment in the direction of large-scale, high-parameterization, and lightweight, steel plates with a yield strength of 690MPa have gradually replaced steel plates with a yield of Q460, and have been widely used in marine engineering, mechanical engineering, and hydropower. The steel plate with a yield strength of 690MPa contains more alloying elements such as Ni, Cr, Mo, etc., and has a large carbon equivalent, so it is easy to produce hardened structures during welding. Hydrogen-induced cracking. Hydrogen-induced cracks have delayed properties and generally appear hours, days or longer after welding, so they are extremely ...
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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/02B23K35/36B23K35/368B23K35/40
CPCB23K35/0266B23K35/3605B23K35/368B23K35/406
Inventor 亢天佑王青云范会卿孔红雨
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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