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

A low-dust crack-resistant full-position flux-cored wire is characterized in that the medicinal powder used by the flux-cored wire is composed of chemical components according to following percentage by weight: 25% of TiO2, 2% of SiO2, 1% of ZrO2, 1% of fluoride, 0.5% of Si, 8% of Mn, 1% of Al, 3% of Mg, 0.3% of Ti, 0.1% of boride, 0.1% of Re, 0.1% of Na2O, 0.1% of K2O, residue percent is iron powder; the preparing method comprises following steps: steel band longitudinal shearing, edge preprocessing, rolling, wire drawing, and winding. The advantages of the invention are: the weld dust is reduced, and the crack resistant property of welding joint is increased; the welding wire is provided with stable welding arc, little splash, good all position welding performance, good-looking weld joint, excellent detachability and good mechanical performance.

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.

The invention discloses a stainless steel flux cored wire protected by CO2 gas. The stainless steel flux cored wire protected by CO2 gas is characterized in that flux cored powder and a steel belt wrapping the flux cored powder are included, and the flux cored powder of the flux cored wire comprises, by weight, 15-35% of rutile, 12-25% of silicon manganese alloy, 12-30% of iron powder, 5-16% of nickel powder, 3-10% of aluminium magnesium alloy, 10-25% of micro-carbon ferro chrome, 5-15% of ferro-molybdenum and 5-15% of ferrovanadium. The stainless steel flux cored wire protected by CO2 gas has the advantages of being suitable for welding on small-specification ultrathin stainless steel devices and containers.

The invention discloses a locomotive-buffer-bar surface repairing and remanufacturing method. The locomotive-buffer-bar surface repairing and remanufacturing method includes the following steps that S1, repairable to-be-repaired buffer bars are screened out; S2, the abrasion loss of the to-be-repaired buffer bars is checked, to-be-repaired areas are determined on different-radius shaft segments ofthe buffer bars according to the size of the abrasion loss respectively, and to-be-repaired grooves are processed in the to-be-repaired areas; S3, the to-be-repaired buffer bars are sequentially subjected to sand blasting, cleaned and preheated; S4, one ends of the to-be-repaired buffer bars are fixed on a displacement device, and the to-be-repaired grooves are subjected to continuous annular welding through a CMT automatic welding system to complete repairing of the to-be-repaired buffer bars; S5, the repaired buffer bars obtained in the step S4 are welded to be subjected to slow cooling treatment; S6, the repaired areas of the repaired buffer bars are machined according to the size of an original-buffer-bar drawing, and then whole sand blasting is carried out. The locomotive-buffer-barsurface repairing and remanufacturing method is low in cost, high in efficiency and high in repairing quality, and the buffer bars after being repaired and remanufactured with the method can reach thequality standard of a new buffer bar.

The invention discloses a laser-InFocus electric arc double-face symmetric composite welding method, and relates to welding methods. The method comprises the steps of firstly, machining and grinding or cleaning a workpiece to be welded; secondly, adjusting the position of an InFocus welding gun and the position of a laser head; thirdly, setting welding parameters, wherein the diameter of light spots ranges from 0.1 mm to 0.5 mm, the defocusing amount ranges from -3mm to 3 mm, the laser power ranges from 500 W to 5000 W, the electric arc current of the InFocus welding gun ranges from 50 A to 1000 A, the welding speed ranges from 50 mm/min to 900 mm/min, Ar gas protection is carried out, the gas flow ranges from 10 L/min to 30 L/min, and the InFocus protection gas flow ranges from 10 L/min to 25 L/min; and fourthly, carrying out composite welding. The InFocus welding gun and a TIG welding machine are matched well, a dedicated power source is not needed, the equipment cost is reduced, the welding gun is reliable and durable, the interchangeability of the consumable is good, and due to the design of the InFocus welding gun, mechanization and automation are easily achieved.

The invention discloses a gas shielded flux-cored welding wire for vertical mill grinding roller bead welding composite manufacture and a preparation method thereof. The welding wire is composed of aferrite stainless steel band and powder wrapped in the ferrite stainless steel band, wherein the powder accounts for 25-28% of the total weight of the welding wire. The powder comprises, by weight, 60.0-65.0% of high carbon ferro-chrome, 12.0-15.0% of chromium carbide, 5.8-6.0% of graphite, 1.0-2.0% of metal manganese powder, 4.0-4.5% of carbonizing silica powder, 1.0-2.0% of aluminum magnesium alloy, 0.2-0.5% of zircon sand, 0.5-1.5 of cryolite, 0.5-1.5% of sodium fluoride, 0.5-1.5% of lithium carbonate, and the balance iron powder. The preparation method comprises the following steps of manufacturing the ferrite stainless steel band with the thickness of 0.4 mm and the width of 10 mm into a U shape; adding the powder into the U-shaped groove; after the U-shaped groove heals up, conducting six times of continuous drawing reducing in sequence; finally conducting mechanical cleaning on the surface of the welding wire; and obtaining the phi 1.2mm gas shielded flux-cored welding wire forgrinding roller bead welding composite manufacture. The vertical mill grinding roller bead welding composite manufacture can be achieved by adopting the welding wire, the welding processing performance of the welding wire is excellent, little welding smoke is produced, the operation is flexible, and a bead welding layer is high in abrasive resistance.

The invention relates to the field of welding wire manufacturing, in particular to a preparation method of an aluminum and aluminum alloy welding wire electrochemically plated with a Zn+Cu/Re composite coating and applied to robot welding. A pure aluminum or aluminum alloy wire rod is used as the matrix. Pretreatment, electrochemical plating of the Zn+Cu/Re composite coating and post-treatment areconducted on the surface. The electrochemically plated Zn+Cu/Re composite coating has the functions of reducing welding smoke, improving the porosity resistance of the welding wire and improving solid lubrication and meanwhile fills up pits in the surface of the welding wire matrix, and the electric conductivity and surface quality of the welding wire are improved; the bonding force and strengthof the Zn+Cu/Re composite coating are high, the aluminum or copper peeling phenomenon is avoided, the Zn+Cu/Re composite coating is high in compactness, good in rust resistance and resistant to wear,Zn can reduce welding smoke and splashes, and Re can refine plating layer crystals and reduce the void ratio; and meanwhile, molten bath stirring is enhanced, a molten bath is purified, crystals are refined, pores on the surface and on the inner portion of a welding joint are thoroughly eradicated, and the porosity resistance of the welding wire is improved.

The invention provides a high-performance rutile carbon steel welding rod. The welding rod comprises a welding core and a cover; and the cover comprises the following components in parts by weight: 45-55 parts of rutile, 10-25 parts of quartz, 10-20 parts of marble, 5-15 parts of medium-carbon ferromanganese, 5-15 parts of kaolin, 2-12 parts of microcrystalline cellulose, 2-8 parts of starch, and1-5 parts of titanium dioxide. In the high-performance rutile carbon steel welding rod and a preparation method thereof, the welding rod achieves excellent comprehensive mechanical performances and reliable cracking resistance, the formation of a welding bead is improved, the welding splashing and the smoke harm are reduced, the generation process of the welding rod is simplified, the quality of the welding rod is stabilized, and high carbon steel welding requirements are met.

The invention relates to a laser-arc hybrid welding solid wire for high-manganese austenite low-temperature steel and a welding process. According to the technical scheme, the laser-arc hybrid welding solid-core welding wire for the high-manganese austenite low-temperature steel comprises the following chemical components: 0.20-0.60 wt% of C; si is less than or equal to 0.05 wt%; the content of Mn is 20-32 wt%; the content of Ni is 0.1 to 2 weight percent; the content of Cr is 0.1 to 1.8 wt%; the content of Cu is 0.55 to 1.00 wt%; the content of W is 0.5 to 1.9 weight percent; the content of Mo is 1.3 to 3.0 wt%; the content of Al is 0.5 to 2 weight percent; the content of Nb + V + Ti + B + RE is 0-0.5 wt%; p < = 0.002 wt%; s < = 0.001 wt%; and the balance of Fe and inevitable impurities. The welding process is laser-arc hybrid welding. Full-automatic welding can be achieved, the welding efficiency is high, welding smoke is little, welding deformation is small, forming is good, and the mechanical property is excellent; a laser and electric arc hybrid welding process is adopted, so that the characteristics of good forming, small welding smoke dust, small welding deformation, high welding efficiency and high ultralow-temperature toughness are achieved, and the strength is matched with that of high-manganese austenite low-temperature steel.

The invention provides a low-dust and low-toxicity flux-cored welding wire. The low-dust and low-toxicity flux-cored welding wire comprises a sheet iron and a flux core. The flux core comprises, by mass percentage, 40-48% of rutile, 6-12% of quartz, 6-10% of magnetite, 4-6% of aluminum powder, 10-15% of ferrosilicon, 3-5% of ferrotitanium, 4-5% of nickel powder, 1-3% of marble and balance iron powder and inevitable impurities. The filling rate of the flux core in the flux-cored welding wire ranges from 14 to 16%. According to the low-dust and low-toxicity flux-cored welding wire, due to the fact that the flux core does not contain manganese and fluoride, the amount of dust generated in the flux-cored welding wire welding process is reduced remarkably, and welding fume does not contain harmful fluoride and almost no MnO. Meanwhile, argon-enriched shielding gas welding is adopted for the flux-cored welding wire, and according to the comprehensive performance of deposited metal and welding joints, the yield strength is larger than or equal to 470 MPa, the tensile strength is larger than or equal to 550 MPa, the elongation is larger than or equal to 22%, and Akv is larger than or equalto 47 J under the condition of minus 60 DEG C.

The invention discloses a vanadium-strengthened wear resistant surfacing electrode and a preparation method thereof. The vanadium-strengthened wear resistant surfacing electrode comprises a welding core and a coating which coats the surface of the welding core through adhesive, and the coating comprises 32-50% of marble, 15-25% of fluorite, 4-10% of titanium dioxide, 3-8% of zircon sand, 3-8% of potassium feldspar, 4-8% of rare earth silicon and 3-10% of ferrovanadium by weight. The vanadium-strengthened wear resistant surfacing electrode is strengthened by vanadium and made of raw materials sold on the market, the hardness and wear resistance of the metal of the surfacing layer can be obviously improved, the good welding technique performance of the electrode is guaranteed, and the cost is low; the application proves that arc striking and re-arcing are easy to perform when surfacing electrode, the electric arc is stable and difficult to break, and the blowing force is large; the welding fume is less, the splashing particle is small, and the deposition efficiency is high; the slag is removed easily, the weld ripples are fine and close, the surface is smooth, and crack, undercut and the like defects are avoided.

The invention discloses a rotating submerged-arc high-speed welding method for a thin plate. The method comprises the following steps that the assembled to-be-welded thin plate is pressed on a weldingbase plate in the welding direction, and welding flux and a welding wire matched with the to-be-welded thin plate are selected according to the material of the to-be-welded thin plate; according to the plate thickness and the groove form of the to-be-welded thin plate, the rotating submerged arc welding method and process parameters are set, finally, the welding flux is laid in the welding direction and the welding arc is ignited at the start welding position, a rotating submerged arc welding torch is controlled to drive the welding arc to rotate at a constant speed in the welding flux according to the set rotation speed and direction, and meanwhile, a dragging mechanism drives the rotating submerged arc welding torch to move to the front of welding overall, so that the rotating submergedarc high-speed welding of the thin plate is achieved. By adopting the rotating submerged-arc high-speed welding method for the thin plate, the implementation cost is low, the welding speed of the single welding wire arc can be remarkably increased, the welding assembly requirement is reduced, and the welding method is particularly suitable for a thin plate welding occasion.

The invention belongs to the field of welding materials, and particularly relates to a self-lubricating wear-resistant flux-cored wire containing a nickel-coated graphite component and a welding method thereof. The self-lubricating wear-resistant flux-cored wire containing the nickel-coated graphite component comprises a flux core and a carbon steel strip used for wrapping the flux core, wherein the flux core comprises the following components of, in percentage by mass, 18-22% of ferrochrome, 7-9% of ferroboron, 3-5% of ferrosilicon, 3-5% of ferromanganese, 0.4-0.6% of metallic aluminum, 2-3%of rare earth elements, 3-5% of nickel-coated graphite and the balance iron. According to the flux-cored wire containing the nickel-coated graphite powder, a hardfacing layer prepared through a double-constant-current-source molten-drop-free electric arc hot wire GTAW surfacing method has a self-lubricating function.