Middle-manganese high-silicon low-fluorine smelting type welding flux
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A smelting-type, high-silicon technology, applied in the direction of welding media, welding equipment, welding/cutting media/materials, etc., can solve the problems of cost increase, rising, narrow application range, etc., to achieve waste reduction, wide application range, and resource conservation Effect
Active Publication Date: 2009-05-20
永州市兴发电熔科技有限公司
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However, due to the large increase in domestic manganese ore consumption in recent years, the high-grade manganese ore resources have gradually decreased, and the continued production of high-manganese flux will encounter serious problems in terms of resources (the production of one ton of HJ431 requires a manganese content of 30% more than 1.2 tons of manganese ore); the second is that the cost is caused by the doubled increase in the price of manganese ore (currently, the price of manganese ore with a manganese content of 30% is more than 1,500 yuan, and every time the manganese content increases by one percentage point, the price of manganese ore increases by 100 yuan). substantial improvement
Chinese patent (patent No. 200410022890.2) discloses a "special flux for electroslag pressure welding of steel bars", the weight percentage of its composition is: MnO 20-24.5%, SiO2 35-40%, CaF2 5-10%, MgO 5 -9%, CaO 5-8%, Al2O3 9-13%, TiO2 3-4.9%, FeO<3.5%; this flux belongs to the medium manganese type flux, which has the advantages of easy arc starting during welding, stable arc and electroslag process, and good welding performance. Excellent mechanical properties of joints, etc., but this flux is mainly suitable for welding of class III steel bars, and its application range is narrow
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[0022] Embodiment: Take 86kg of manganese ore, 10kg of fluorite, 5kg of magnesia, 20kg of quicklime, 25kg of river sand, 4.5kg of rutile with TMn of 23 degrees, and an appropriate amount of coke powder, put them into an electric arc furnace for smelting, and the medium manganese High-silicon and low-fluorine smelting flux finished product 123kg, the weight percent of its effective composition is:
[0023] MnO 24 SiO 2 38 CaF 2 6 CaO 18
[0024] MgO 4 TiO 4 Al 2 o 3 3 FeO 1.5.
[0025] Among them: P≤0.08, S≤0.06.
[0026] The medium-manganese, high-silicon and low-fluorine smelting flux of the present invention can be widely used in submerged arc automatic welding in the equipment manufacturing process in the fields of machinery manufacturing, petrochemical industry, coal metallurgy, mining, construction, electric power, military industry, aerospace, marine engineering, etc. , semi-automatic welding, electroslag pressure welding, copper welding and vertical steel pr...
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Abstract
The invention discloses a medium-manganese high-silica low-fluorine smelting soldering flux, which belongs to the field of welding in the mechanical industry. The medium-manganese high-silica low-fluorine smelting soldering flux comprises the following effective compositions in portion by weight: 21 to 26 portions of MnO, 36 to 40 portions of SiO2, 4 to 8 portions of CaF2, 15 to 21 portions of CaO, 3 to 5 portions of TiO2, 3 to 5 portions of MgO, less than or equal to 8 portions of Al2O3, and less than or equal to 1.8 portions of FeO. The medium-manganese high-silica low-fluorine smelting soldering flux has the characteristics that poor manganese ore (namely low-grade manganese ore) can be utilized for production, the cost is low, the application scope is wide, various quality and technical indexes of the medium-manganese high-silica low-fluorine smelting soldering flux can meet the pertinent regulations of F4A2-H08A in the GB / T 5293-1999, and so on and the medium-manganese high-silica low-fluorine smelting soldering flux can be widely applied to union melt welding, semiautomatic welding, electroslag pressure welding, copper welding, pressure welding of vertical reinforcements and so on. in the process of equipment manufacturing in the fields of machine manufacturing, the petrochemical industry, coal metallurgy, mines, buildings, electric power, the military industry, aerospace, marine engineering, and so on.
Description
Technical field [0001] The invention relates to the field of welding in the machinery industry, in particular to a medium-manganese, high-silicon, and low-fluorine smelting flux. Background technique [0002] In the equipment manufacturing process of machinery manufacturing, petrochemical industry, coal metallurgy, mining, construction, electric power, military industry, aerospace, ocean engineering and other fields, submerged arc automatic welding, semi-automatic welding, electroslag pressure welding and copper welding are widely used And pressure welding of vertical steel bars, etc., when performing the above welding, it is necessary to use various fluxes for protection. In the prior art, the typical flux is HJ431, which is a smelting high-manganese, high-silicon, and low-fluorine flux. It is a light yellow to reddish-brown glassy object, and its effective components are: MnO: 32-38, SiO 2 : 40-44, MgO: 5-8, CaF 2 : 3-7, CaO≤8, Al 2 o 3 ≤6, P≤0.08, S≤0.06, this kind o...
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