31results about How to "Good fluidity of molten pool" patented technology

The invention discloses a low-hydrogen basic welding rod for welding 1Ni9 steel. The low-hydrogen basic welding rod comprises a coating and a welding core; the coating consists of the following materials according to a weight ratio of: 34-48% of marble, 20-27% of fluorite, 2-8% of quartz, 4-5% of zircon sand, 3-10% of rutile, 1-3% of titanium dioxide, 2-5% of ferrosilicon, 1-3% of rare earth ferrosilicon, 4-11% of ferrotitanium, 2-8% of mid-carbon ferromanganese, 1-3% of synthetic mica, and 1-2% of sodium carbonate; and the sum of the weight percentages of the components is 100%. The invention further discloses a preparation method of the low-hydrogen basic welding rod, comprising the following steps of: mixing powder with a binding agent and then pressing a mixture into a cylindrical powder cluster; placing the cylindrical powder cluster in a press; placing the welding core on a wire feeding table of the press; operating the press to manufacture the welding rod; and grinding the head and the tail and then gradually heating and drying, so as to obtain the low-hydrogen basic welding rod. According to the low-hydrogen basic welding rod provided by the invention, the content of diffusible hydrogen in weld metal is low, so that the requirement on the low-hydrogen content can be met; the rigidity under a liquid nitrogen temperature is better; and the engineering requirements can be met.

The low-temperature and high-toughness welding wire for X80 pipeline steel disclosed by the invention is composed of the following components by mass percentage: C≤0.06%, Si 0.15-0.27%, Mn 1.30-1.50%, P≤0.003%, S≤0.003% , Ni 1.20~2.40%, Cr 0.02~0.08%, Cu 0.03~0.05%, Nb 0.02~0.05%, V 0.005~0.010%, Ti 0.06~0.10%, Mo 0.10~0.20%, Al 0.01~0.02%, B ≤0.005%, N≤0.005%, the balance is Fe, and the sum of the mass percentages of the above components is 100%. The welding wire solves the problem of insufficient low temperature toughness of the weld. The invention also discloses a preparation method of a low-temperature and high-toughness welding wire for X80 pipeline steel.

The invention discloses a high-toughness low-hydrogen alkaline electrode, which includes a coating and a welding core. The coating is composed of the following materials in percentage by weight: 38%-44% of marble, 20%-25% of fluorite, and 3% of zircon sand %~5%, ferrosilicon 1%~5%, ferrotitanium 10%~15%, medium carbon ferromanganese 5%~7%, titanium dioxide 2%~4%, mica 3%~6%, microcrystalline fiber 1.5% %~2%, nickel powder 1.2%~1.8%, mixed rare earth 1%~1.5%, the sum of the weight percentages of the above components is 100%. The invention also discloses its preparation method. After the coating material is mixed with potassium sodium mixed water glass, it is pressed into a cylindrical powder and put into a pressure coating machine, and the cylindrical powder is pressure-coated on the H08A welding core to make an electrode. , and then grind the head and tail and then dry it. The invention does not need preheating before welding and heat treatment after welding when welding high-strength steel, effectively controls the diffusible hydrogen content of deposited metal, and has a simple preparation method.