95results about How to "High in manganese" patented technology

The invention provides a high-nickel-series and full-concentration gradient lithium ion battery positive electrode material and a preparation method thereof and belongs to the field of lithium ion battery positive electrode materials. The structural formula of the positive electrode material is LiNixCoyMnzO2@LiNiaCobMncO2, wherein x is more than or equal to 0.7 and smaller than or equal to 1.0, y is more than or equal to 0.1 and smaller than or equal to 0.3, z is more than or equal to 0.05 and smaller than or equal to 0.1, a is more than or equal to 0.4 and smaller than or equal to 0.5, b is more than or equal to 0.1 and smaller than or equal to 0.3 and c is more than or equal to 0.25 and smaller than or equal to 0.3; the sum of the x, the y and the z is equal to 1, and the sum of the a, the b and the c is equal to 1; the positive electrode material is spherical and has a core-shell-type structure; in a process from a core of an inner core to the surface of a shell, the contents of nickel, cobalt and manganese are distributed in linear concentration gradient; the content of the nickel is gradually reduced, and the content of the cobalt is not changed or is gradually increased; and the content of the manganese is gradually increased. The invention further provides the preparation method of the high-nickel-series and full-concentration gradient lithium ion battery positive electrode material. The positive electrode material provided by the invention has high capability, high circulating performance and high safety performance.

One kind of rare earth boraxium alloying high manganese steel that has the mass ratio of ingredient: C 0.9-1.6, Mn 13-30, B 0.0005-0.02, Re 0.01-0.05, Si 0.3-1.0, Cr<3, Mo<2, Ni<1, Cu<1, V+Ti+Nb+Zr+N+Al+Ca<2 S<0.04, P<0.07, the residue is Fe. Its process includes blending, melting, tapping of molten steel, adding alterant, packing. Its advantages include a good abradability of more than two fold than formal high manganese steel.

The invention discloses an Ausferrite ductile cast iron grinding ball, and relates to a spherulitic graphite-contained cast iron alloy. The Ausferrite ductile cast iron grinding ball comprises the following chemical elements in percentage by mass: 3.3-3.7% of C, 2.0-3.0% of Si, 1.0-2.5% of Mn, 0.7-3.0% of Cr, 0.1-1.0% of Mo, 0.1-1.0% of Cu, 0.04-0.08% of P, 0.01-0.020% of S, 0.03-0.05% of Mg, 0.02-0.04% of Ce, 0.03-0.07% of B, 0.06-0.12% of Ti, 0.03-0.2% of V, and the balance of Fe. The Ausferrite ductile cast iron grinding ball is prepared by the steps of preparation and smelting of raw materials, spheroidizing treatment, inoculation treatment and microalloying treatment, and isothermal quenching heat treatment. The Ausferrite ductile cast iron grinding ball overcomes the defects of low production efficiency and high consumption of electric energy of a ball mill due to easy surface stripping and crushing and shorter fatigue life of an existing grinding ball product in the service process.

The invention relates to a material for an aluminum electrolysis crust-breaking hammer, which is characterized by comprising the following components in percentage by weight: 0.5%-3.0% of carbon, 3.5%-10.0% of manganese, 0.5%-1.0% of silicon, less than 0.05% of phosphorus, less than 0.05% of sulphur, 5.0%-20.0% of chromium, less than 0.05% of Ni and the balance of ferrum. The material for the aluminum electrolysis crust-breaking hammer is an iron alloy material and is prepared by using a lost foam casting or sand casting process. In the invention, The manganese content in the material for the crust-breaking hammer is increased and the chromium content is optimized, thereby the material effectively improves the strength and wear resistance of the aluminum electrolysis crust-breaking hammer, prolongs the service life of the hammer, extends the replacement period, reduces the production cost and effectively relieves the labor intensity.

A method for coating hot-rolled or cold-rolled steel strip containing 6-30 wt %. Mn with a metallic protective layer, includes annealing the steel strip at a temperature of 800-1100° C. under an annealing atmosphere containing nitrogen, water and hydrogen and then subjecting the steel strip to hot dip coating. The method provide an economical way of hot dip coating a high manganiferous sheet steel in that, in order to produce a metallic protective layer substantially free from oxidic sub-layers on the steel strip, the % H₂O/% H₂ ratio of the water content % H₂O to the hydrogen content % H₂ in the annealing atmosphere is adjusted as a function of the respective annealing temperature TG as follows: % H₂O/% H₂≦8·10⁵·T_G^3.529.

The invention discloses non-oriented electrical steel for a new energy vehicle and a manufacture method thereof, and relates to non-oriented electrical steel and the production method thereof. The production method comprises the following steps: step A, smelting; step B, continuous casting; step C, heating; step D, phosphorus removal; step E, rough rolling; step F, feeding into a hot rolling box to process; step G, finish rolling; step H, rolling; step I, primary cold-rolling; step J, intermediate annealing; step K, secondary cold-rolling; and step L, final annealing. The non-oriented electrical steel aims to overcome the defects that an existing production process has difficulty in meeting using requirements of the non-oriented electrical steel for the new energy vehicle, provides the non-oriented electrical steel for the new energy vehicle and the production method thereof which can produce the ultrathin non-oriented electrical steel for the new energy vehicle, and the ultrathin non-oriented electrical steel is low in iron loss under high frequency, and is good in high magnetic induction and surface quality.

The invention belongs to the technical field of metal smelting, and particularly relates to industrial ultra-pure iron and a production method thereof. The industrial ultra-pure iron comprises the following components of, less than or equal to 0.25 wt% of C, less than or equal to 0.005 wt% of Si, less than or equal to 0.005 wt% of Mn, less than or equal to 0.0008 wt% of S, less than or equal to 0.003 wt% of P, less than or equal to 0.005 wt% of Al, less than or equal to 0.003 wt% of Ti, 0.003-0.007 wt% of Ce, 0.001-0.004 wt% of La, trace of Nd and Pr and the balance Fe and inevitable impurities; and the preparation method comprises the following procedures of KR molten iron pre-desulfurization, converter deep dephosphorization, LF deep desulfurization, RH deep deoxygenation, continuous casting and electroslag remelting in sequence. The purity of the iron prepared by the method is high.

The invention relates to an alloy comprising (in mass %) Ni 33-35%, Cr 26-28%, Mo 6-7%, Cu 0.5-1.5%, Mn 1.0-4%, Si max. 0.1%, Al 0.01-0.3%, C max. 0.01%, N 0.1-0.25%, B 0.001-0.004%, SE>0 to 1%, and Fe remainder, including unavoidable impurities.

The invention provides a manufacturing method of a high manganese high nitrogen low nickel non-magnetic stainless steel and a product thereof. The stainless steel is single phase austenite stainless steel which comprises the following chemical components in percentages by mass: greater than 0 but less than or equal to 0.1% of C, less than or equal to 0.01% of S, less than or equal to 0.015% of P, greater than 0 but less than or equal to 1.0% of Si, greater than or equal to 16% but less than or equal to 18% of Mn, greater than 0 but less than or equal to 2% of Ni, greater than or equal to 10% but less than or equal to 14% of Cr, greater than or equal to 1% but less than or equal to 2% of N, greater than or equal to 0.3% but less than or equal to 1% of Cu, greater than or equal to 0.3% but less than or equal to 5% of Mo, greater than or equal to 0.3% but less than or equal to 1% of Nb and the balance of Fe. The manufacturing method comprises the following steps: heating and smelting raw materials, and performing decarbonization, desulfuration and deoxygenation; raising the temperature to 1600 DEG C and adding nickel; adjusting the temperature of a bath to 1550 DEG C, and adding ferromolybdenum, ferrocolumbium and a metal copper; adding a desoxidant for secondary deoxidization, introducing nitrogen, adjusting the temperature of the bath to 1610-1620 DEG C, and adding nitrogen containing ferrochromium; adjusting the temperature of the bath to 1150-1250 DEG C, introducing nitrogen, adding nitrided ferromanganese, pouring, quenching and air cooling, and machining to form a panel, heating the panel to 650-700 DEG C, keeping the temperature for 30min, and performing furnace cooling to room temperature. The stainless steel through deep punching is still non-magnetic, and needs not to be annealed and demagnetized. The manufacturing method is high in nitrogen-increasing efficiency and low in loss of equipment.

A recycling method of scrap steel plate that can recycle scrap steel plates including scrap of high-tensile steel plate to produce good quality of cast iron efficiently, while avoiding unnecessary cost increase. In the recycling method, scrap of high-tensile steel plate and scrap of ordinary steel plate are collected together in a batch collecting process and, then, in a preparing process, the scrap steel plates collected are melted and if not less than 0.7 weight % manganese is contained in the hot metal, then the hot metal is prepared so that a sulfur content in the range of 0.02 to 0.2 weight % in the hot metal and rare earth element or misch metal which is two times as much as the sulfur content is added to the hot metal. To obtain spheroidal graphite cast iron, spheroidizing agent (which preferably comprises no rare-earth element but comprises bismuth) is added further to the hot metal after that.

The invention provides wear-resisting cast steel. The cast steel comprises the following chemical components by weight percent: 0.3-0.4% of C, 1.8-2.2% of Mn, 0.8-1.2% of Cr, 0.6-1.0% of Si, 0.02-0.05% of Mo, 0-1.0% of Ni, 0-1.0% of V, 0-1.0% of Ti, 0-1.0% of Re, less than or equal to 0.04% of P, less than or equal to 0.04% of S, and the balance of Fe. Compared with the existing wear-resisting cast steel, the wear-resisting cast steel has the advantages that the content of manganese is improved and the content of molybdenum is lowered, thus the cost is lowered under the premise of guaranteeing the hardenability of the cast steel; the content of manganese is improved but the content of silicon is lowered, so that the wear-resisting cast steel is improved in thermal conductivity so as to avoid generating cracks in water quenching; furthermore, by regulating the content of carbon, manganese, chrome, silicon and molybdenum, the wear-resisting cast steel is improved in impact toughness and hardness, is not easy to break and has excellent wear-resisting property.

The invention discloses manganese doped inorganic halogen perovskite quantum dots and a preparation method thereof. The preparation method comprises the following steps: lead salt and manganese chloride are dissolved and heated at 80-110 DEG C, and a halogen precursor is obtained; cesium salt is dissolved, and a cesium precursor is obtained; the cesium precursor is added to the halogen precursor,the mixture is heated at 80-110 DEG C, and the manganese doped inorganic halogen perovskite quantum dots are obtained. The method for preparing the manganese doped inorganic halogen perovskite quantumdots with high yield at lower temperature needs no inert gas protection, preparation cost is reduced, preparation efficiency is improved, quantum yield is as high as 62.41% which is 12.41% higher than the current highest quantum yield of 54% with a hot injection method, and the method can be applied to mass production.

A method of producing steel (1) with a high manganese and low carbon content on the basis of liquid pig iron (2) or liquid steel (3) and slag-forming constituents (4) with the object of preventing existing drawbacks of process route in vessels other than, e.g., electrical arc furnaces (18). With steel produced with a high manganese and low carbon content, in a process, the carbon component is reduced to about 0.7-0.8% by a combined blowing of oxygen (7) through top lances (8) and underbath nozzles (9) after feeding of liquid ferro-manganese (50 and liquid steel (3a) in a FeMn-refining converter (6a), wherein a component of a cold end product from premelt is added as cooling means (10), and wherein the carbon component is reduced to about 0.05-0.1% C by a continuous blowing of oxygen (7) through the underbath nozzles.

The invention relates to a high-hardness alloyed nodular iron die material which comprises, by weight, 3.4-3.9% of C, 2.0-2.5% of Si, 0.2-0.4% of Mn, less then 0.02% of P, less then 0.02% of S, 0.4-0.6% of Cr, 0.7-1.0% of Cu, 0.4-0.6% of Mo, 0.6-1.0% of Ni, and the balance Fe. The preparation method includes the following steps of proportioning a material according to the above chemical components, placing the material to an intermediate frequency coreless induction melting furnace for melting at a melting temperature of 1300 DEG to 1500 DEG; casting the alloyed nodular iron; carrying out a surface intermediate frequency induction quenching treatment on the alloyed nodular iron via a movable induction heating device with an output power of 20 to 28 kW and at a quenching temperature of 850DEG to 950 DEG; and air-cooling the alloyed nodular iron after quenching. Through the novel proportioning of the chemical components, the alloyed nodular iron die material becomes suitable for the manufacture of large-scale automobile panels in mass production, and is excellent in strength and hardenability.

The invention relates to a converter manganese ore direct alloying steelmaking method, and belongs to the technical field of steelmaking. According to the method, a converter double-slag smelting method is adopted, a slagging material is added for primary slagging blowing, carbon drawing and deslagging are conducted after early dephosphorization, then secondary slagging blowing is conducted, the slagging material, a temperature raising agent and manganese ore are added in the secondary slagging blowing process for alloying, blowing is conducted till the final molten steel temperature is 1640-1670 DEG C, and tapping is conducted. According to the method, the dephosphorization effect of the converter is guaranteed, meanwhile, the manganese content of the end point molten steel is increased,and the manganese yield is high.

The invention discloses a simple, efficient and low-cost method for removing manganese from molten iron in a top and bottom combined blown convertor. The final manganese content of the convertor is controlled to be less than 0.05 weight percent. The method comprises the following specific steps of: adding steel scrap into the convertor, adding the molten iron into the convertor, adding a demanganization agent into the liquid level of the molten iron, supplying oxygen to the liquid level of the molten iron by using an oxygen lance from the top, supplying stirring gas into the molten iron from the bottom, monitoring the CO content of converter gas, and pouring initial slag out when the inhibition of the carbon oxidation is converted into intense carbon oxidation, wherein the amount of poured slag is not less than 60 percent of the total slag amount; and adding the demanganization agent into the liquid level of the molten iron. Compared with the conventional method for removing manganese by a common blowing process or a convertor duplex manganese removal process, the method has the advantages that: special manganese removal equipment is not required, a mature top and bottom combined blown convertor blowing technology is fully utilized, and the dynamical condition for removing manganese from the molten iron is fully met, the common demanganization agent used as the raw material is used, sources are wide, and price is low.

A 304 stainless steel smelting method by an AOD (argon oxygen decarburization) converter comprises 1) a silicon aluminum oxidation stage; 2) a main decarbonization stage; 3) a dynamic decarburization stage; 4) a reduction stage; and 5) desulfurization alloying; and is characterized in that: silicon mixed manganese ore balls are added in the reduction stage, the silicon mixed manganese ore balls are prepared by mixing and pressing manganese ore powder with a manganese percent content of 25-40% and ferrosilicon powder in a ratio of 7:3, the dosage of the silicon mixed manganese ore balls is 0.01-0.02 ton / ton steel, the silicon mixed manganese ore balls are averagely added in 2 to 3 times at intervals of 2 to 3 minutes; the decarbonization stage smelting temperature of the AOD converter is 1560 to 1620 DEG C; in the desulfurization alloying stage, lime is supplemented, and the lime adding amount is 0.04-0.06 ton / ton steel. According to the method, silicon mixed manganese ore is used for replacing manganese alloy, the production cost can be effectively reduced, the purity of molten steel can be ensured, manganese alloy production link can be directly omitted, and the pollution of the environment can be reduced.