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 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 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.

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 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.