40results about How to "Less welding fumes" patented technology

The invention relates to a supersonic-speed flame spraying type flux-cored wire and a preparation method of the supersonic-speed flame spraying type flux-cored wire. The flux-cored wire comprises a cylindrical cover made of a steel strip, a through hole which penetrates through the outer cover along the axis is formed in the outer cover, and the through hole is filled with core powder which comprises, by weight, 45-60 parts of metal powder, 40-50 parts of alloyed powder and 8-18 parts of mineral powder. The preparation method includes the steps that firstly, core powder is prepared, meanwhile, the steel strip is rolled to be of a U-shaped groove structure, and the core powder accounting for, by weight, 17%-19% the flux-cored wire is added into the U-shaped groove; then, the through hole penetrating through the steel strip is formed in the axial direction of the steel strip after the opening of the U-shaped groove is closed through a forming machine, wherein the core powder is wrapped in the through hole; finally, line-by-line drawing and diameter reduction are carried out on the steel strip through a drawing machine so as to obtain the supersonic-speed flame spraying type flux-cored wire. The supersonic-speed flame spraying type flux-cored wire prepared through method is high in welding speed and high in efficiency, little spatter occurs in the welding process, weld formation is good, the amount of welding fume is small, the amount of produced welding slag on the surface of a weld layer is small, and weldments are free of pits or pores.

A gas-shielded flux-cored wire for arc welding, characterized in that the flux core composition includes the following components and mass percentages: TiO2? 20-22%, SiO21-4%, ZrO21-2.5%, Al2O31-3%, MgO ? 1.5%, AlF35~9%, NiF25~6%, Na2SiF61~6%, Ti3Al? 3~4%, Fe3Al4~6%, Co1~2%, the balance is Fe. The flux-cored welding wire of the present invention has excellent technological properties such as low hydrogen content in weld metal diffusion, small spatter, and few defects such as pore cracks, and the welded joint has excellent low-temperature impact toughness and excellent corrosion resistance, and is especially suitable for marine engineering equipment Welding of high-strength steel with a yield strength of 700MPa in the manufacturing industry.

The invention discloses a recycled gas-shielded flux cored wire component and a preparation method thereof, which belong to the field of welding. The recycled gas-shielded flux cored wire component is characterized be comprising the components by the weight portions as follows: 35-65 percent of TiO2, 5-15 percent of MnO, 5-15 percent of MgO, 5-15 percent of SiO2, 1-15 percent of Fe2O3, and 1-15 percent of Al2O3. The invention is characterized in that the invention discloses a method for collecting, processing and recycling welding slag of rutile cored wires to replace rutile; through the steps of coarse screening, coarse grinding, magnetic separating and fine grinding, the granularity and chemical components of the welding slag are driven to satisfy requirements; and then the welding slagof the rutile cored wires can be used as a cored wire component to be added into gas-shielded flux cored wires to reach the purposes of replacing or partially replacing natural rutile, saving resources and reducing costs. As long as the powder components and granularity of the welding slag after processing and preparing are in the scope of the recycled gas-shielded flux cored wire component, the recycled gas-shielded flux cored wire component can be recycled for a plurality of times.

The invention discloses a submerged-arc welding flux-cored wire. The submerged-arc welding flux-cored wire is characterized in that flux core powder comprises the following components in percentage by weight: 10 to 32 percent of rutile, 5 to 15 percent of silicon-manganese alloy, 10 to 45 percent of iron powder, 2 to 15 percent of nickel powder, 10 to 40 percent of chromium metal, 2 to 15 percent of aluminum magnesium alloy and 5 to 15 percent of micro-carbon ferro chrome. The submerged-arc welding flux-cored wire has the advantages that the submerged-arc welding flux-cored wire is resistant to wear and corrosion and is suitable for overlaying of continuous rollers and welding of components of gas turbines and blades of centrifugal pumps.

The invention discloses a carbon dioxide gas shielded welding flux-cored wire, which is characterized in that the flux-cored powder of the wire is mixed by the following components in percentage by weight: 10-30% of rutile, 10-30% of silicomanganese, 15-40% of iron powder, 2-15% of nickel powder, 2-25% of chromium metal, 1-5% of aluminium magnesium alloy, 2-10% of ferromolybdenum and 2-10% of ferrovanadium. The carbon dioxide gas shielded welding flux-cored wire disclosed by the invention has the advantages that the hardness and the non-deforming performance of a hot mill guide plate, a hot-forging die, a valve and the like are still can be kept even if the hot mill guide plate, the hot-forging die, the valve and the like work under the high-temperature impact load for a long time.