107results about How to "Excellent welding workability" patented technology

The invention discloses a surfacing electrode for repairing a hot forged mould, which uses a low-carbon steel H08A core wire conforming to the GB/T3429 requirement. The solid component quality content of coating is as follows: 30-40% of marble, 12-20% of fluorite, 1.5-3% of zircon sand, 0-2% of soda ash, 2-5% of silicon epitaxy material, 1-3% of titanium white, 0-3% of flogopite, 1-2% of rare earth fluoride, 3-7% of manganese metal, 2-5% of ferrosilicon, 4-6% of ferrotitanium, 4-8% of chromium metal, 4-8% of ferromolybdenum, 6-12% of metallic nickel and 1-2% of aluminium magnesium alloy. The invention has favorable welding rod performance, smooth welding rod surface, high yield and stable eccentricity; electric arc is easy to ignite and is stable to burn; coating is even to melt, a welding line is attractive in shape, and slag is easy to clean; and a deposition metal weld metal buildup has moderate welding state hardness which reaches the requirements of the hot forged mould, thus improving the service life cycle of the hot forged mould.

The present invention provides a flux cored wire which increases bonding strength and is excellent in bonding efficiency in jointing an aluminum-base material with a steel-base material, a method for jointing dissimilar materials and a bonded joint obtained by the method. Specially, the present invention provides the method for jointing dissimilar materials when high-tension steel section and 6000 series aluminum alloy with different strength are executed with welded connection or when steel section is coated with aluminum. In one mode, the flux cored wire which is filled with welding flux in the outer skin of the aluminum product, therefore, the flux is prepared to a fluoride composition containing a certain amount of AlF3 and containing no chloride. The outer aluminum contains 1-13wt% of Si. When the flux cored wire according to the invention is used, a high jointing strength is obtained when high-tension steel section and 6000 series aluminum alloy with different strength are executed with melting welding.

The invention discloses a surfacing welding electrode. The surfacing welding electrode consists of a welding core and a coating, wherein the coating is coated on the outer wall of the welding core; the welding core comprises the following chemical components in percent by weight: 0.6-1.4% of C, 0-1.0% of Mn, 0.3-2.0% of Si, 28-35% of Cr, 3.2-6.5% of W, 0-2.0% of Fe and the balance of Co; and the coating adopts a TiO2-Si02-CaO slag system and comprises a slag making agent, a gas making agent and an alloy agent. All the components are as follows: the slag making agent comprises the following components in percentage by weight: 35-50% of rutile and titanium white (TiO2), 10-20% of mica, feldspar and bentonite (SiO2) and 5-12% of fluoride, wherein the fluoride comprises at least one of NaF and MgF2, CaF2 and BaF2; the gas making agent comprises the following component in percentage by weight: 12-22% of carbonate comprising CaCO3, MgCO3 and BaCO3; and the alloy agent comprises the following component in percentage by weight: 10-18% of manganese, chromium and nickel. In the welding material, a drill is utilized as a base body, so that the surfacing metal can still maintain good wear resistance and corrosion resistance when in working at the temperature of about 650 DEG C, and simultaneously the welding operation is good.

The invention discloses a flux-cored wire, which relates to a flux-cored wire with medicinal powder filled in a soft steel sheath that is specially used for gas shielded arc welding. Each component of the medicinal powder has the following percentages by weight relative to wires: 3.0% to 11.0% of TiO2; 0.02% to 0.10% of C; 0.3% to 1.2% of Si; 0.7% to 2.0% of Mn; 0.1% to 1.5% of Ni; 0.1% to 1.2% of Mo; 0.0010% to 0.0045% of B; 0.05% to 1.00% of the sum of any one or more than two elements of Na, K, Li and Cs; 0.05% to 1.00% of the sum of any one or more than two elements of Mg, Ca, Ba, Al and Zr; balance iron powder and irremovable impurities, and the composition of each element satisfies the conditional expression that C+Si/25+Mn/5+Ni/40+Mo/5 is greater than or equal to 0.25 and is less than or equal to 0.60; the electric arc welding for gas shielding at the conditions that the maximum welding heat is 60KJ/cm and the maximum interlayer-temperature is 350 DEG C has excellent welding operation, fine welding metal intensity of tension and impact ductility.

The invention discloses an ultra-supercritical material CB2 steel matched welding rod applicable to long-term high-temperature service. A coating is prepared from, by weight, 220-300 parts of marble, 180-300 parts of fluorite, 40-70 parts of rutile, 4.5-7.0 parts of sodium carbonate, 6-8 parts of zircon sand, 100-150 parts of iron powder, 10-30 parts of electrolytic manganese, 40-80 parts of silica powder, 20-60 parts of cryolite powder, 1-15 parts of nickel powder, 1-10 parts of chromium metal, 1-5 parts of molybdenum powder, 1-15 parts of ferrovanadium, 1-15 parts of niobium powder, 1-15 parts of nitrogen-bearing ferrochromium, 1-10 parts of potassium fluoborate, 1-10 parts of borax and 1-5 parts of si-mg-fe alloy. Weld joint molding is attractive, the weld pass height is moderate, the weld joint infiltration angle is moderate, and the deposited metal physical and chemical property is moderate.

The invention discloses sintered flux for submerged-arc welding of a steel structure U-shaped rib plate. The sintered flux comprises, by mass percent, 15%-25% of MgO, 3%-8% of CaO, 15%-25% of CaF2, 2%-5% of MnO, 25%-35% of Al2O3, 10%-20% of SiO2, 3%-7% of TiO2 and 1%-3% of SiFe. According to the sintered flux, the welding speed can be increased, the stable fusion depth can be provided in the high-speed welding state, and welding forming is attractive.

The invention discloses a welding rod additive containing cerium oxide and a method for preparing the welding rod additive containing cerium oxide. The method for preparing the welding rod additive containing cerium oxide comprises the following steps that (a) high-purity titanium dioxide, carbonate and cerium oxide are weighed according to a proportion and then are mixed, so that a mixture is obtained; (b) the mixture is placed into a ball mill for ball milling for three hours to five hours, and a powder mixture is obtained; (c) the powder mixture is contained in a bowl, the bowl containing the powder mixture is pushed into a furnace, the temperature of the furnace is made to rise to 1195 DEG C-1205 DEG C with the temperature rising rate of 240 DEG C/h-260 DEG C/h, the temperature is maintained for 3.5 hours to 4.5 hours, then a temperature rising system of the furnace is stopped, and the bowl is taken out of the furnace after natural cooling is conducted for 7.5 hours to 8.5 hours; (d) after a synthesized lump in the bowl is naturally cooled to be at the normal temperature, the lump is smashed and ground to be particles which at least can pass through a 100-mesh screen, and thus the welding rod additive containing cerium oxide is obtained. When the welding rod additive is added to welding rods, arc voltage can be lowered when the welding rods are used, electric arcs can be stabilized, splashing is reduced, and the welding strength of the welding rods can be greatly improved.

Provided is a flux for use in submerged arc welding, capable of reducing the moisture content in the flux and the amount of diffusible hydrogen in the welding metal, and exhibiting favorable welding activity, regardless of whether the welding power source is of the alternating current or the direct current type. The composition of this flux for use in submerged arc welding contains MgO in the amount of 25-35 mass%, F in the amount of 15-35 mass% when calculated as CaF2, Al2O3 in the amount of 10-25 mass%, SiO2 in the amount of 10-20 mass%, one or more of Na when calculated as Na2O, K when calculated as K2O, and Li when calculated as Li2O in the total combined amount of 0.5-6.5 mass%, Fe in the amount of 0.5-5 mass% when calculated as FeO, TiO2 in the amount of 1-5 mass%, CaO in the amount of 6 mass% or less (including 0 mass%), Mn in the amount of less than 2.0 mass% when calculated as MnO (including 0 mass%), water-soluble SiO2 in the amount of 1.0 mass% or less (including 0 mass%), water-soluble Na2O in the amount of 1.0 mass% or less (including 0 mass%), and water-soluble K2O in the amount of 0.8 mass% or less (including 0 mass%). In addition, the C content thereof is 0.2 mass% or less (including 0 mass%). Furthermore, the flux composition satisfies mathematical formula (I), given that the MgO content is [MgO], the Al2O3 content is [Al2O3], the F content when calculated as CaF2 is [CaF2], and the TiO2 content is [TiO2].

The invention discloses a combined gasket. The combined gasket is used for forming the back face of a longitudinal seam when the front face of the longitudinal seam of a bridge deck slab and a U-shaped rib is welded, and comprises a soft gasket body used for being attached to the back face of the longitudinal seam tightly, and a hard gasket body used for being attached to the face, away from the longitudinal seam, of the soft gasket body, wherein when the front face of the longitudinal seam is welded, part of the soft gasket body is fused, and the hard gasket body is not fused. The invention further discloses an automatic mounting and pasting jacking mechanism of the combined gasket and a welding process of the combined gasket. Through the combined gasket, the problem of hybrid manufacturing of low-melting-point materials and high-melting-point materials is solved, the gasket cost is reduced, through the automatic mounting and pasting jacking mechanism, the problem that gaskets cannot be mounted in long and narrow U-shaped cavities manually is solved, and through the welding process, the problem that burn through is liable to occur to traditional bridge deck slab U rib welding or the design weld penetration cannot be reached is solved.

The invention discloses a welding rod additive containing yttrium oxide and a method for preparing the welding rod additive containing yttrium oxide. The method for preparing the welding rod additive containing yttrium oxide comprises the following steps that (a) high-purity titanium dioxide, carbonate and yttrium oxide are weighed according to a proportion and are mixed, so that a mixture is obtained; (2) the mixture is placed into a ball mill for ball milling for 3 hours to 5 hours, so that a powder mixture is obtained; (3) the powder mixture is contained in a bowl, the bowl containing the powder mixture is pushed into a furnace, the temperature of the furnace is made to rise to 1195 DEG C-1205 DEG C with the temperature rising rate of 240 DEG C/h-260 DEG C/h, the temperature is maintained for 3.5 hours to 4.5 hours, then a temperature rising system of the furnace is stopped, and the bowl is taken out of the furnace after natural cooling is conducted for 7.5 hours to 8.5 hours; (d) after a synthesized lump in the bowl is naturally cooled to be at the normal temperature, the lump is smashed and ground to be particles which at least can pass through a 100-mesh screen, and thus the welding rod additive containing yttrium oxide is obtained. When welding rods manufactured with the welding rod additive serving as processing raw materials are used practically, the arc voltage during welding can be lowered, electric arcs can be stabilized, splashing is reduced, the welding strength of the welding rods can be effectively improved, and electricity loss can be reduced.

Disclosed is a solid wire for arc welding, including: a flat portion of a wire surface with no copper plating, wherein micro Vickers hardness (Hv) of the flat portion is in the range of 115 to 310 and arithmetical average roughness (Ra) of the flat portion is in the range of 0.01 to 0.30·m. The solid wire is based on a new concept different from a conventional solid wire. The solid wire for arc welding has excellent feedability without copper plating, thereby improving weld workability. Consumption of energy during manufacture of the solid wire can be reduced because the solid wire is manufactured without copper plating, and a weld work environment can be improved because copper fumes are not generated.

The invention provides a flux-cored wire with excellent high-temperature crackle forming property. Rosin flux filling rate in mass percentages of the flux-cored wire relative to total mass of welding wire is 10-20%, relative to the total mass of the welding wire, the flux-cored wire contains: in weight percentages, C 0.03-0.08%, Si (sum of Si amount calculated from total Si source contained in the welding wire): 0.10-1.00%, Mn (sum of Mn amount calculated from total Mn source contained in the welding wire): 2.30-3.75%, Ti 0.15-1.00%, TiO2: 5.0-8.0%, Al: 0.05-0.50%, Al2O3: 0.05-0.50%, and the rest amount is composed of Fe and unavoidable impurity, and, the Ti amount calculated from the Ti is used as a calculation amount, and the sum of the Si amount calculated from total Si source contained in the welding wire is used as a Si calculation amount, which satisfies the relationship (Ti calculation amount/Si calculation amount)>0.20.

The invention discloses an auxiliary welding rod of Q500QE steel suitable for bridge and a preparation method thereof. The auxiliary welding rod is composed of a core wire and a coating wrapped on the surface of the core wire, the compositions and the content of the coating are, by weight, 300-400 parts of marble, 200-320 parts of fluorite, 30-100 parts of rutile, 4-7 parts of sodium carbonate, 1-5 parts of zircon sand, 150-350 parts of iron powder, 10-20 parts of electrolytic manganese, 10-40 parts of silica powder, 10-20 parts of cryolite powder, 5-10 parts of nickel powder, 2-5 parts of molybdenum powder, 5-10 parts of potassium titanate, and 5-10 parts of potassium fluosilicate. Compared with the prior art, the auxiliary welding rod is smooth in surface, high in yield, and stable in eccentricity.

The present invention provides a flux-cored wire for gas protection of arc welding which guarantees normal welding work at high current and form a good weld bead when the welding is performed vertically. The flux-cored wire for gas protection of arc welding contains prescribed quantity of titanium oxide, C, the combination of silicon convertion amount of metal silicon and silicon conversion amount of silicon oxide, silicon conversion amount of metal silicon, combination of aluminum conversion amount and magnesium, combination of sodium conversion amount of sodium compound and kalium conversion quantity of kalium compound, and fluorine conversion amount of fluorine compound. Filling ratio of flux is limited. Titanium oxide comprises prescribed amounts of titanium dioxide, silicon, aluminum, iron, magnesium and calcium, and a compound formed by more than one of the titanium, the iron, the magnesium, aluminum and silicon exists on the surface of a particle. Furthermore, in the oxide, the percent of the atoms of the aluminum and the silicon meets the formulation of 1<=Al+Si<=10.

A flux cored wire, which is obtained by filling the inside of a steel outer skin with a flux, is configured to have a composition that contains, in mass% relative to the total mass of the wire, 0.01-0.12% of C, 0.05% or more but less than 0.30% of Si, 1.0-3.5% of Mn, 0.1% or more but less than 1.0% of Ni, 0.10-0.30% of Mo, 0.1-0.9% of Cr, 4.5-8.5% of TiO2, 0.10-0.40% of SiO2, 0.03-0.23% of Al2O3 and 80% or more of Fe.

The invention discloses a wear-resistant manual surfacing electrode. The wear-resistant manual surfacing electrode is composed of, by weight, 10-20 parts of ferroboron, 3-8 parts of silicon, 2-6 parts of barium carbonate, 5-12 parts of carbon, 4-9 parts of high carbon ferro-chrome, 2-5 parts of nickel powder, 3-8 parts of ferrotitanium, 5-14 parts of cellulose, 6-8 parts of amorphous graphite and 10-12 parts of rutile. Because a substrate of the surfacing electrode is made of cobalt, good wear resistance and good corrosion resistance can stilled be kept when the surfacing electrode works under the temperature of about 650DEG C; meanwhile, the surfacing electrode is good in welding operation performance and has the advantages that electric arcs are stable, arc light is soft, spatter is small, slag detachability is good, the appearance of weld joints is attractive and welding performance is good.

The invention relates to a gas shielded solid welding wire used for steel with the yield strength being 460 MPa and a manufacturing method. The gas shielded solid welding wire comprises, by mass, 0.04%-0.12% of C, 0.9%-1.4% of Mn, 0.4%-0.8% of Si, 0.8%-1.1% of Ni, 0.08%-0.2% of Mo, 0.02%-0.05% of Ti, 0.0015%-0.0030% of B, 0.20%-0.25% of Cu, less than or equal to 0.01% of Al, less than or equal to0.010% of S, less than or equal to 0.020% of P, less than or equal to 0.005% of O, less than or equal to 0.005% of N, 0.0050%-0.010% of Ce, and the balance iron powder and unavoidable impurities. Whengas shielded welding with 80% of Ar and 20% of CO2 is conducted, the mechanical properties of deposited metal reach welding requirements of steel with the yield strength being 460 MPa and used for marine engineering, impact energy at -40 DEG C is over 120 J, and NDT is below -60 DEG C.