821results about How to "Easy to remove slag" patented technology

The invention provides a high hardness ferrite stainless steel wearable flux-cored wire, which takes a low carbon steel H08A cold rolling thin steel strip as an external wrapper; furthermore, the wrapper is internally provided with a powder core which is composed of graphite, metal and alloy powder; the weight percentages of all ingredients of the powder core are 50-75% of high carbon ferrochrome, 10-16% of ferrovanadium, 6-10% of ferrotitanium, 2-10% of tungsten carbide, 2-3% of nickel powder, 1.5-2.5% of silver graphite, 1-3.5% of boron carbide, 1-2% of aluminium magnesium powder, 0-10% of metallic chromium, and the residual quantity of reduced iron powder; the filling proportion of the powder core is 46-50%; the invention adopts the technical proposal that high-content ferrovanadium and adequate alloy powders such as tungsten carbide and boron carbide, etc. are added into the flux-cored wire, changes the microstructure of the existing ferrite stainless steel flux-cored wire surfacing alloy, overcomes the shortages of poor wearability and ductility, and can be applied to submerged arc bead weld manufacture or repair of the parts which has high requirement of abrasion and the corrosion resistance of the wearable grain.

The invention relates to a flux-cored wire for austenitic stainless steel all-position welding, and the flux-cored wire is composed of a flux core and an external stainless steel belt, wherein, the flux core accounts for 22-24wt% of the flux-cored wire, and the flux core comprises the following components in percentage by weight: 20-23% of metal chromium powder, 7-8.5% of metal nickel powder, 2-4% of electrolytic manganese metal, 3-4% of aluminium powder, 0.5-1% of ferrotitanium, 32-34% of rutile, 1-2% of quartz, 2-4% of zircon sand, 4-6% of albite, 2-4% of potassium feldspar, 1-1.5% of cryolite, 1-1.5% of lithium carbonate, 0.1-0.5% of bismuth oxide and the balance of iron powder. The ratio of the albite to the potassium feldspar in the flux core is 1.2-2, the sum of the albite and the potassium feldspar is not more than 10wt% of the flux core, the external stainless steel belt is the austenitic stainless steel 304L, the carbon content is less than 0.025wt%, the diameter of the flux-cored wire is 0.9-1.2mm, and the flux-cored wire can be used for realizing the austenitic stainless steel all-position welding.

The invention discloses a mobile environment-friendly paint spraying booth in the technical field of paint spraying. The paint spraying booth comprises a paint spraying booth body and a transport vehicle; an inner cavity of the paint spraying booth body is divided by a dividing plate into a paint spraying chamber located on the right side and a drying chamber located on the left side; a driving mechanism is mounted in the center of the inner wall of the top of the paint spraying chamber; a dust sensor is mounted on the back side of the inner wall of the top of the paint spraying chamber; the top end of a filtering box is connected with the bottom end of an air inlet pipe; the top end of the air inlet pipe extends to the top of an inner cavity of the paint spraying chamber; an air inlet cover is mounted at the top end of the air inlet pipe; and the bottom of a hydraulic cylinder I is connected with a detecting mechanism through a telescopic rod I. According to the paint spraying booth,an upper paint spraying pipe cooperates with side paint spraying devices on two sides, clamped workpieces are rotated by 180 degrees by two rotation motors, and two-side paint spraying is performed onthe workpieces, so that the paint spraying efficiency for the workpieces is improved effectively; and the workpieces after paint spraying are dried by the aid of a fan with heat produced by a heatingresistance wire II during working, so that environmental pollution caused by waste gas and waste liquids which are produced during paint spraying is avoided.

The invention discloses an alloy ingot for an automotive hub and a production method thereof. The alloy ingot comprises the following components: 6.8-7.2% of Si, 0.28-033% of Mg, 0.10-0.15% of Ti, 0.015-0.030% of Sr, less than or equal to 0.10% of Fe, less than or equal to 0.05% of Mn, less than 0.01% of zinc, less than 0.01% of Cu, less than 0.003% of Ca, less than 0.002% of P, less than 0.02% of other single impurity content, less than 0.1% of total impurity content and the balance of aluminum. The production method of the alloy ingot for the automotive hub comprises the following steps of: adding 3303 industrial metallic silicon and electrolytic aluminum liquid for batching, heating at an appropriate temperature and melting, spreading a covering agent so as to reduce oxidation slagging, stirring so that the industrial metallic silicon rapidly melts, keeping uniform temperature, slagging off, keeping melt clean, spraying powder and refining by adopting high-purity N2 and a refined powder spraying agent, controlling the temperature of a smelting furnace to 740-750 DEG C, adding Al-Sr alloy to aluminium water, carrying out secondary degassing and slagging-off by adopting a powder spraying refinement method, filtering to remove slag, and casting the alloy ingot in line with requirements. The alloy ingot obtained by the method has the advantages of stable and uniform components, compact structure and clean surface; and the production method is the best production method for producing the A356.2 alloy ingot for the low-iron high-end automotive hub.

The invention relates to a T91 water wall tube row welding technology. The welding technology comprises the steps of (1) cleaning before welding; (2) welding material preparation: preparing welding wires and flux, and performing baking before flux use, wherein the baking temperature is in a range of 250 DEG C to 400 DEG C, and the baking time ranges from 0.5h to 3h; (3) spot welding before welding: using R317 welding wires to flat steel and T91tube electric welding, wherein the welding strips are needed to be baked; (4) preheating before welding: performing preheating before welding to enable all portions of materials to be welded to be uniform in heating; (5) tube row welding: performing welding in the condition of the 300A-320A welding current, 26V-27V welding voltage and 80mm/min-90mm/min and performing coverage with asbestos immediately after front welding seams are welded; (6) hydrogen removal after welding; (7) detection; (8) thermal treatment. The welding technology is simple and convenient to operate, covering through insulation cotton is performed after welding, and accordingly, cracks due to rapid cooling can be prevented.

The invention discloses a low-temperature steel flux cored wire. Flux core of the flux cored wire comprises the following raw materials by weight percentage: 28 to 33 percent of rutile, 1 to 3 percent of aedelforsite, 14 to 18 percent of silicon-manganese alloy, 16 to 21 percent of ferrous powder, 2 to 4 percent of nickel powder, 1 to 2 percent of cryolite, 5 to 7 percent of feldspar, 1.5 to 2.5 percent of ferrotitanium, 0.5 to 1 percent of ferroboron, 5 to 6 percent of mid-carbon ferromanganese, 2.5 to 4 percent of magnesite, 4 to 6 percent of quartz and 1.5 to 3.5 percent of fluorite. Compared with the similar product of the prior art, the flux cored wire belongs to the meta-acid slag series, and has the advantages of good electric arc stability, less splash, easy slag removal, good low-temperature impact ductility, good low-temperature crack resisting performance, high efficiency and low cost.

The invention relates to a sintered flux for stainless steel surfacing with band electrode. One technical scheme of the sintered flux for stainless steel surfacing with band electrode includes that the sintered flux is formed by sintering the following components and the proportioned raw materials or materials, including 15-30 parts of CaF2, 20-50 parts of MgO, 1-10 parts of Al2O3, 15-30 parts of CaO, 25-50 parts of SiO2, and 1-5 parts of alloy powder. The another technical scheme includes that the sintered flux for stainless steel surfacing with band electrode comprises the following components and the proportioned raw materials or materials including 60-80 parts of CaF2,20-40 parts of Al2O3, 1-5 parts of CaO, 1-5 parts of SiO2, and 1-5 parts of alloy powder. The sintered flux has excellent performance and can meet the service requirements completely.

This invention relates to a kind of automobile hub of magnesium alloy and producing metho. It belongs to the die-casting technology of non-ferrous metal. The main raw material is magnesium alloy ingot. After preheating and drying, it is put in pot and melted under high temperature. Adding master alloy, mixing it fully. The following steps are refining and degassing, casting, heat treatment, machining, surface painting, drying, japanning. During the process, the degassing can reach standard easily. Magnesium liquid slag-removing is easy.

The invention discloses a low-hydrogen basic electrode for welding FV520 (B) stainless steel, comprising a core wire and an electrod covering, wherein the electrode covering comprises the following materials in weight percentage: 35%-45% of marble, 18%-26% of fluorite, 6%-9% of quartz, 3%-6% of zircon sand, 6%-12% of rutile, 1%-3% of ferrosilicon, 6%-10% of ferrotitanium, 5%-11% of low-carbon ferromanganese, 1%-3% of rare-earth ferrosilicon and 0.5%-1.5% of sodium carbonate, and the sum of the weight percentages of the components is 100%. Compared with the traditional special imported electrode for the FV520 (B) stainless steel, the electrode made of the electrode covering has the advantages of favorable arc stabilization performance, good fluidity of a molten bath, less splash and dust, easier slag removal after welding, uniform slag coverage, and delicate and attractive welding joint formation. The content of diffusible hydrogen generated by using the developed electrode for depositing metal is effectively controlled and meets the requirements of low-carbon contents.

The invention provides high tenacity and low hydrogen type agglomerated flux for ocean engineering. The high tenacity and low hydrogen type agglomerated flux is composed of, by weight, 18%-23% of MgO, 28%-32% of CaF2, 18%-22% of Al2O3, 1%-5% of TiO2, 18%-22% of SiO2, 3%-7% of CaO, 2%-5% of Na3AIF6, 2%-6% of MnO, 0-0.015% of S and 0-0.025% of P. By means of the high tenacity and low hydrogen type agglomerated flux, weld metal has good welding process properties such as sediment separation and pore resistance and a good anti-cracking property; the Charpy impact energy is relatively high at the temperature of -40 DEG C and the content of diffusible hydrogen meets the requirement of ultra-low-hydrogen.

Provided is an E309L stainless steel lengthened welding electrode capable of being used for large-current welding. A coating contains marble, fluorite, rutile, dehydrated potassium feldspar, dehydrated mica, bismuth oxide, chrome green, magnetite, sodium carbonate, micro-carbon ferro chrome, electrolytic manganese metal, zircon sand, potassium fluoroaluminate, rare earth fluoride, chromium metal and metallic nickel, blending and even stirring are conducted according to the ratio of the coating, 15-20% of sodapotash water glass is added and evenly stirred according to the total weight of the coating, the coating and an ER308L welding wire are put in an oil pressure type welding electrode extrusion press to produce and prepare the lengthened welding electrode, and no coating cracks or flushing can happen when the large current is 170-180 A and the welding core length is 450 mm; though an ER308L welding core is adopted, the cladding metal chemical components meet the requirement of E309L chemical components through the coating transition alloy method, and therefore the welding electrode has good welding process performance and is stable in electric arc, convenient to operate, good in weld appearance during welding, and sediments are easily separated.

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 weather-proof flux core wire used for coating-free bridge steel and a preparing method of the weather-proof flux core wire. The weather-proof flux core wire is composed of a steel skin and a powder core. The powder core comprises, by weight percent, 2%-8% of ferro-boron, 0.01%-2% of ferromolybdenum, 1%-6% of fluoride, 1.5%-8% of zircon sand, 2%-7% of magnesium powder, 2%-5% of quartz sand, 2%-8% of silicon iron, 5%-19% of electrolytic manganese, 1%-5% of ferromanganese, 1%-6% of nickel powder, 1%-8% of chromium metal, 1%-8% of copper powder, 2%-9% of ferrotitanium, 0.1%-5% of feldspar, 2%-8% of sodium titanate, 20%-40% of rutile and the balance iron powder. Compared with the prior art, the weather-proof flux core wire is stable in welding arc and little in splashing, slag removing is easy, a welding joint is formed attractively, the weather-proof flux core wire is suitable for all-position welding, the mechanical performance of the welding joint is good, the impact toughness at the temperature of minus 40 DEG C is larger than 80 J, and very high corrosion resistance is achieved.

The present invention provides a sintered flux for stainless steel. The slag system of the flux is CaF2-Al2O3. The invention is characterized in that the oxidability and the sensibility of the gas hole are small. The stainless steel structure and the stainless steel overlaying welding can be welded when the sintered flux is matched with the corresponding welding stick. The invention is characterized in that the sintered flux comprises the following components: more than 40% by weight of calcium fluoride (CaF2), and furthermore the summation of the calcium fluoride and aluminum oxide (CaF2+Al2O3) is larger than or equal to 70% by weight; other components as follows: smaller than or equal to 5% by weight of CaCO3, 1-3% by weight of CrO3, smaller than 4% by weight of NaAlF6, 1-3% by weight of rare earth fluoride, 3-10% by weight of SiO2, 3-10% by weight of MnO, 1-3% by weight of TiO2, 5-10% by weight of MgO, and 1-3% of iron alloy; and bonding agent of sodium potassium silicate.

A sintering welding wire for the multi-wire high-speed autoamtic hidden arc welding contains MgO (19-28 mass%), CaF2 (12-18%), ZrO2 (8-15%), Al2O3 (18-24%), SiO2 (17-25%), CaO (7-13%), RE (0-7%), MnO (0-5%), TiO2 (0-5%), Na2O+K2O (2-5%), S (0-0.05%), and P (0-0.06%). Its advantages are stable arc, beautiful welded seam, and high welding speed (1.5-2 m/m).

A stainless heat-proof self-protecting flux-cored wire for a magnesium smelting reduction tank belongs to the technical field of materials processing engineering. A normal stainless steel band 304L or common carbon steel serves as a coating layer, and alloys in a powder core are rutile, sodium carbonate, feldspar, compound fluorides, chromium, nickel, manganese, molybdenum, chromium nitride, aluminium-magnesium alloy, misch metal and iron power. Compared with a conventional stainless steel welding rod, the stainless heat-proof self-protecting flux-cored wire has the advantages that higher welding current can be used; higher welding speed can be realized; the production efficiency is improved; and the labor intensity is lowered; c. Compared with a conventional stainless steel submerged-arc welding solid wire, the stainless heat-proof self-protecting flux-cored wire has the advantages that all-position welding can be realized; the heat input is small; the slag detachability is good; and the manufacturing technique is simpler. A welded joint formed by using the stainless heat-proof self-protecting flux-cored wire provided by the invention has favorable heat resistance, oxidation resistance, vulcanization and corrosion resistance and high-temperature creep resistance compared with welded joints formed by welding the stainless steel welding rod and the stainless steel solid wire.

The invention discloses a welding rod for welding of martensite heat-resistant steel and belongs to the technical field of welding materials. The welding rod consists of a core wire and a coating, wherein the core wire is prepared from components in percentage by weight as follows: 0.07%-0.10% of C, less than or equal to 0.3% of Si, 0.3%-0.7% of Mn, less than or equal to 0.004% of P, less than or equal to 0.002% of S, 8.5%-9.5% of Cr, 2.8%-3.3% of W, 2.8%-3.5% of Co, 0.04%-0.08% of Nb, 0.15%-0.25% of V, 0.8%-1.0% of Cu, 0.007%-0.011% of N, 0.011%-0.020% of B and the balance of Fe; the coating is prepared from components as follows: 30%-45% of marble, 18%-25% of fluorite, 5%-10% of rutile, 10%-16% of barium carbonate, 5%-10% of ferrotitanium, 1.5%-3% of electrolytic manganese, 5%-10% of iron powder, 0.4%-0.8% of sodium carbonate, 0.4%-0.8% of carboxymethyl cellulose and 0.8%-3% of chromium metal powder. The welding rod has the advantages that the arc is stable during welding, few splashes are caused, the all-position operability is good, the slag detachability is good, formed welds are attractive in appearance, and deposited metal after welding has high strength and high toughness close to that of a parent metal, higher endurance strength and excellent crack sensitivity.

A welding stainless steel electrode with improved slag detachability and welding quality is composed of a core and a coated flux layer prepared proportionally from rutile, feldspar, marble, fluorite, wollastonite, megnesite, titaniunm oxide powder, hematite, aluminum fluoride, mice, barium carbonate, Cr, Ni, sodium carbonate, electrolytic manganese and ferrotitanium.

The invention discloses a high chromium and manganese type austenite steel alkali full-position gas shielded flux-cored wire, which comprises a 0Cr17 stainless steel band sheath and flux cored, wherein, the flux cored is prepared by mixing the following components by the weight percentages: 4-10 percent of rutile, 1-5 percent of feldspar, 0.5-2 percent of sodium carbonate, 8-15 percent of fluorspar, 0.5-1.5 percent of sodium fluosilicate, 40-68 percent of manganese powder or low carbon ferromanganese, 1.5-20 percent of chromium powder, 0-15 percent of nickel powder, 2-4 percent of graphite, 0-15 percent of molybdenum powder or ferromolybdenum, 0.5-4.5 percent of ferrosilicon and iron powder in balancing amount. The invention has the advantages that the ductility of the welding wire is good, the diameter is small, the small-scale welding can be conducted, the impurity content is low, and the hot cracking resistance is good; meanwhile, the splashing degree of the welding wire is low, the welding mold is good, the slag detachability is good, the excellent processing property such as the full-position welding can be conducted, and the production efficiency of the welding is high.

The invention discloses an alkaline smelting flux used for submerged arc welding. The alkaline smelting flux used for submerged arc welding is characterized by comprising, by mass percentage, 5%-15% of CaF2, 7%-20% of CaO, 11.2%-32% of MgO, 8%-30% of SiO2, 7%-23% of Al2O3, 5%-10% of MnO2, 0.5%-2% of TiO2, 0.5%-2% of K2CO3, 2%-4% of B2O3 and 0.2%-3% of FeO, the proportion of the above CaO and the above MgO is strictly controlled at 1: 1.6, and the total sum of the mass percentage of the above components is 100%. The novel smelting flux is obtained through preparation, the method is simple, and a high-quality smelting flux material is provided for connection of 12MnNiVR low-alloy high-strength steel after US-49 welding wires are used for cooperation.