170results about How to "Uniform cooling rate" patented technology

The present invention discloses forging and rolling technology for large pulley. The forging and rolling process includes hot forging and upsetting steel blank to the required thickness and diameter, die forging to form the hub and spokes, and hot rolling to form the inner circular surface, end surfaces, outer circular surface and slot in circumference of the rim. The present invention also provides the corresponding hot rolling apparatus. The present invention can obtain pulley with high strength, high wear resistance, small internal stress, less deformation and other advantages.

The invention relates to a casting method of large-scale high pressure resisting multi-cylinder-block cast. The method includes the following steps: (1) mold making, (2) sand mold making, and (3) casting molding: during the sand mold making of the step (2), a sprue is designed into a first sprue (1) and a second sprue (3), a cross gate is designed into a first cross gate (2) and a second cross gate (4), and an ingate (5) is designed into a plurality of parallel pouring gates. Cross section area of all pouring gates is set as the following relation: the cross section area of the first sprue (1) is larger than that of the first cross gate (2), the cross section area of the first cross gate (2) is smaller than that of the second sprue (3), the cross section area of the second sprue (3) is larger than that of the second cross gate (4), and the cross section area of the second cross gate (4) is smaller than that of the ingate (5). The casting method overcomes the defects that shrinkage cavities, shrinkage porosities, slag inclusion and the like do not exist in the cast and can meet quality requirements that cylinder holes can be used as cylinder inner walls after the cylinder holes are machined.

The invention relates to a cooling system and method for a low-temperature liquid hydrocarbon storage tank. The cooling system comprises a liquid hydrocarbon transportation ship, a ship unloading arm, a liquid hydrocarbon output general pipe, a cooling straight pipe and a cooling annular pipe, wherein the liquid hydrocarbon transportation ship carries liquid hydrocarbon; the ship unloading arm is connected with a liquid hydrocarbon output pipe of the liquid hydrocarbon transportation ship; the liquid hydrocarbon output general pipe is connected with an output end of the ship unloading arm to output the liquid hydrocarbon; the cooling straight pipe is connected with the liquid hydrocarbon output general pipe and enters the inside of an inner tank via an arc crown of an outer tank, an insulation material and a suspended ceiling of the inner tank sequentially; the cooling annular pipe is positioned in a horizontal plane in the inner tank, and comprises an edge annular pipe and a liquid hydrocarbon dispersion pipe, wherein the liquid hydrocarbon dispersion pipe penetrates the central point of the edge annular pipe and is used for dispersing liquid hydrocarbon; the edge annular pipe is communicated with the liquid hydrocarbon dispersion pipe, and the liquid hydrocarbon dispersion pipe is communicated with the cooling straight pipe at the central point of the edge annular pipe; and openings are uniformly distributed at the lower part of the edge annular pipe at intervals, and each opening is connected with a hollow nozzle used for spraying and atomizing outflowing liquid hydrocarbon. The cooling system and method provided by the invention enables the cooling speed of the storage tank to be uniform.

The invention makes public a kind of composite nanometer Fe3B/R2Fe14B permanent magnetism powder by high-energy gas atomizing and the method of making it. Transform the alloy fluid, whose atomic composition formulary is Rx(Fel-wCow)100-x-y-xByTz, into ball powder by high-energy gas atomizing. Then dispose it and get composite nanometer Fe3B/R2Fe14B powder based on Fe3B by hot crystallization. The R is at least one component as following: Nd, Pr, Dy, and Tb. The T is at least one of the following components: Zr, Nb, Cr, Ga, Ti, V and Si. And the proportion should be:3.0<=x<=6.0,8<=y<=22,0<=z<=5,0<=w<=0.5. The powder made by this method has advantages such as glaze, ball shape, good fluidity and low cost, and is especially fit for adhesive binding magnet by injection molding.

The invention relates to a method for preparing nanoscale spherical Si-phase Al-Si alloy through selective laser melting. The method comprises the steps that a CAD three-dimensional model for forming parts is designed, and is converted into a data format STL file capable of being slit, a supporting body of a certain height is built at the bottom of the three-dimensional model, the three-dimensional model and the supporting body are slit into a plurality of layers, technological parameter setting is carried out, and data and parameters are guided into SLM equipment; a sealing device is filled with inert gas for atmosphere protection after being vacuumized, a base plate is fixed to a work table capable of ascending and descending, a layer of Al-Si alloy powder is evenly laid on the base plate through a powder feeding system, corresponding cutting layers are selectively scanned according to guided-in parameter lasers, the base plate is lowered by the thickness of one layer, and a layer of new Al-Si alloy powder is evenly laid on the base plate until scanning of all the layers is finished. In the method, no mold is needed, the utilization rate of materials is high, the mechanical property of the Al-Si alloy can be improved, and the production cost of parts in a complex shape can be lowered.

The invention discloses a heat-treatment cooling process for a train wheel, and belongs to the technical field of heat-treatment cooling for train wheels. The heat-treatment cooling process for the train wheel comprises the steps that first, the whole wheel is heated to be completely austenitized; second, the wheel is transferred onto a quenching table and is made to rotate, a gas-mist two-phase flow with the pressure being increased step by step is sprayed onto a wheel tread; and third, the whole wheel is placed into a tempering furnace for heat preservation and is finally taken out to be air-cooled, wherein the gas-mist two-phase flow with the pressure being increased step by step is sprayed onto the wheel tread sequentially through three stages, the rotation speeds V1, V2 and V3 of thewheel, the water pressures P1, P2 and P3 and the quenching times T1, T2 and T3 in the three stages are controlled, and the numbers of started nozzles which are distributed at equal intervals in the circumferential direction of the wheels in the three stages are respectively M, 2M and 3M. By adoption of the heat-treatment cooling process for the train wheel, the capacity to cool the interior of a rim can be improved, the cooling speed is kept balanced and consistent from the wheel tread to the deep interior of the rim, the structure of the whole cross section of the rim is optimized, and accordingly, the radial hardness gradient of the rim is greatly reduced, and the mechanical property and usability of the wheel are greatly improved.

The invention relates to a steel ingot water-cooling crystallization process. The process comprises the following steps that condensate water is poured into a cooling water cavity in advance; liquid steel is poured into a mould body of a water-cooling mould after temperature is controlled, the pouring speed of a riser is lower than that of a steel ingot, the condensate water is poured continuously with the temperature maintained for 30 min-160 min, and the steel ingot is released after being condensed; then, a thermal insulation sleeve without a thermal insulation cover is covered, ventilation is performed for 3 h-15 h, and the thermal insulation sleeve is covered with the thermal insulation cover with the temperature maintained for 15 h-40 h; the steel ingot is transferred into a pit with the temperature maintained for 10 h-40 h after all the steel ingots are condensed. The process has the advantages that the thermal insulation sleeve is adopted, the large steel ingot free of pores, dense in internal tissue structure and good in quality is obtained after pouring by controlling the use mode of the thermal insulation sleeve; cooling water can only gradually rise from the lower portion of a mould cavity by means of a cooling water path formed by the cavity wall in a partitioned mode, so that it is guaranteed that the cooling mode is achieved, no dead water zones exist in a cooling process of the steel ingot by means of the cooling water circulation mode, cooling speed is even, the water-cooling mould will not deform, service life is long, and each steel ingot mould is used about 500 times.

The invention discloses a corner glass piece toughening treatment process, which comprises the following steps of: heating a glass plate, and shaping by using a corresponding mold; and blowing air to two sides of the formed glass product by using a blowpipe in a corresponding shape to make the glass product immediately cooled to room temperature, and adjusting the aperture of nozzles at a corner and the distance between the nozzles to make the cooling speed of the internal and external bent parts at the corner of the glass consistent with that of the plane part. Through the process, corner glass with a bent angle of 90 degrees or more than 90 degrees and small bend degree R can be subjected to toughening treatment, the forming precision of finished products is high, the appearance quality of the products is excellent, the finished product ratio is high and the granularity is uniform.

The invention discloses rotating vertical water spray quenching equipment for quenching large complicated forged components. The rotating vertical water spray quenching equipment is suitable for quenching large end socket class, cake class and tapered cylinder class forged components and is characterized by designing a series of copying and exchangeable inner water spray systems and iron support pads. The equipment is provided with a universal platform, and different inner water spray systems and iron support pads can be changed in consideration of different types of forged components, so that the equipment is highly targeted. The equipment is simple to operate and stable in running and is energy-conservative and efficient.

The invention discloses a sintering heat preservation device, a sintering machine and a sintering method thereof, and belongs to the field of sintering equipment. The heat preservation device comprises a heat preservation cover with an upper opening and a lower opening, a heat exchanger is arranged in the heat preservation cover, the upper opening of the heat preservation cover is sealed, and theheat exchanger is used for preheating the outer air entering the heat preservation cover during sintering operation; and the heat preservation device can fully utilize the heat dissipated by the sintering material surface to form a gradually-reduced trapezoidal temperature field, and the oxygen supply uniformity of the cross section of a sintering trolley is improved, so that the sintering qualityof the upper part of the sintering material layer is improved, and the ore return rate is reduced. The sintering machine comprises the sintering trolley, a ignition furnace and the heat preservationdevice, the sintering machine can supply sufficient oxygen to the sintering material layer while preserving heat, and the quality of the upper part of the sintering material layer and the uniformity of the sintering cross section are improved. According to the sintering method, the above sintering machine is adopted, through setting a reasonable sintering process, the sintering material surface can be ensured to be slowly and uniformly cooled in an environment with sufficient oxygen, the sintering is uniform, and the sintering quality is improved.

The invention discloses a vertical water-entry thick plate quenching machine. The quenching machine comprises a quenching tank, wherein one side of the quenching tank is provided with a lifting device, and the other side, corresponding to the lifting device, of the quenching tank is provided with a swinging device, the lifting device comprises a plurality of lifting tracks arranged on one side wall of the quenching tank at intervals, and the lifting track is provided with a lifting trolley, the swinging device comprises beams hinged with the lifting trolleys, and the tank body edge at other side of the quenching tank is provided with a plurality of swinging cranks at intervals; one end of the swinging crank is fixedly connected with a rotating shaft, and the other end of the swinging crank is propped against the bottom of the beam, the swinging crank is driven by a driving device to swing around the rotating shaft; and spraying pipes are respectively arranged at interval parts corresponding to the beams and in the quenching tank. The quenching machine can enter the steel plate into the water in the vertical state, and is capable of effectively improving the quenching effect of the steel plate and improving the mechanical performance index of the product; the floor area of the quenching machine is reduced, and the equipment cost is lowered.

The invention discloses a method for improving the uniformity of the general performance of a rolled wire rod. According to the method, the laying temperature Ts is equal to Fs+85 DEG C+(Vs/0.3m/s)*30DEG C+/-10 DEG C, wherein Fs is the phase change temperature, VS is the speed of an initial section of a roller bed, the initial section of the cooling roller bed can do reciprocating motion perpendicular to the advancing direction of the roller bed, the length is 1.2-1.5m, the reciprocating motion frequency is 50-60 times/min, the amplitude is 0.10-0.15m, so that the density and the lap joint ofthe wire rod are dislocated, and therefore the performance difference between the edge part and the middle part can be reduced. The method has the advantages that the general strength difference of the steel wire rod can be controlled within 20MPa.

The invention relates to the technical field of steel rolling, in particular to an HRB400E-F coiled reinforced bar fine grain rolling technology method. The HRB400E-F coiled reinforced bar fine grainrolling technology method comprises the following steps that step 1, the heating temperature of a billet in a heating furnace is controlled by means of sectional heating, so that the tapping temperature of the billet is controlled at 1050+/-20 DEG C, and the temperature difference between the end face and the head and tail is equal to or smaller than 30 DEG C; step 2, water dipping tanks behind passing through pre-finishing rolling and finishing rolling mills are increased to control the temperature of the billet entering into the finishing rolling to 900 DEG C, the temperature before enteringa wire-drawing machine is 810 DEG C, and the temperature of the wire-drawing machine is 860 DEG C; step 3, the phase change cooling rate is increased through air cooling; and step 4, the speed of a conveying roll gang is controlled in sections, the conveying speed of the roll gang is increased gradually, the overlap positions of steel wire rods are pulled out gradually, the stacking density of wire coils is reduced, so that the cooling speed is balanced. According to the HRB400E-F coiled reinforced bar fine grain rolling technology method, the cost is greatly reduced under the premise of meeting the quality.

The invention discloses a method for efficiently reducing bubbles on the surface of an aluminum bar and a using device thereof. The using device comprises a base, a supporting column, a concave cavity and a hydraulic rod, wherein the supporting column is fixed on one side of the upper end of the base, the concave cavity is formed in the upper end of the supporting column, the hydraulic rod is fixed in the concave cavity, a fixing frame is installed at the top end of the hydraulic rod, a material guide hopper is arranged on the fixing frame, a material guide pipe is arranged at the bottom end of the material guide hopper, and a magnetic plate is installed in the material guide hopper. The method and the using device have the beneficial effects that an electric push rod, a scraping plate and a connecting rod are arranged, in the bubble eliminating process, the electric push rod enables the scraping plate to move up and down in a mold cavity through the connecting rod, then the bubbles gathered on the inner wall of the mold cavity are eliminated, meanwhile, a vibration machine is matched, so that the number of the bubbles on the surface of the aluminum bar during forming can be effectively reduced, the percent of pass of the aluminum bar is improved, and the practicability and the working effect of the device are improved.

The invention discloses special quenching liquid for 50Mn steel and a quenching method of a 50Mn steel bearing ring, and belongs to the field of heat treatment quenching technologies. The quenching liquid comprises, by mass, 18.1-19.1% of water glass, 1.1-1.3% of NaOH, 25.2-26.3% of sodium chloride and the balance of water, wherein the modulus of the water glass is 2.4, and the baume degree of the water glass is 56. The quenching liquid has the advantages of being uniform in cooling speed, good in quenching performance and dispersity, high in storage stability and not prone to deterioration. The 50Mn steel bearing ring quenched through the quenching method has a deep quenching layer and is uniform in quenching hardness, uniform in internal structural form and free of quenching cracks.

The invention provides cooling equipment for use in machining of GH4169 turbine disk forgings, which can solve the problems of low cooling rate, instable product quality and the like in the conventional GH4169 ally forging cooling process. The cooling equipment comprises a cooling water tank, wherein the bottom of the cooling water tank is provided with a rack. The cooling equipment is characterized by also comprising a cooling machine, wherein the cooling machine is connected with the cooling water tank through an external circulating pipe; and the cooling water tank is also connected and provided with an internal circulation system.

The invention relates to the technical field of cooling of hot assembly equipment, in particular to a cooling device and method for hot assembly equipment. The cooling device includes: a cooling box for accommodating cooling liquid, a flow guide tube connected to a compressed air source, a nozzle detachably connected to the flow guide tube, a water suction tube communicating with the cooling box and the flow guide tube, and a cooling liquid control valve arranged on the water suction tube. During usage, high-speed airflow is adopted to quickly cool the hot assembly equipment, after the temperature is lowered to a certain temperature, the cooling liquid control valve is opened, cold mist is adopted to further accelerate the cooling rate, meanwhile, the spray flow rate can be adjusted by adjusting the cooling liquid control valve, and thus the water consumption is adjusted according to the cooling demands. The cooling device adopts the combination of high-speed airflow cooling and cold mist cooling, has the technical effects of high cooling speed, wide coverage area and relatively uniform cooling speed of each part of the hot assembly equipment, and does not change the characteristics of metal materials, and takes the cooling speed and the material durability of the hot assembly equipment into account.

The invention relates to a polymer reactor with a novel structure, comprising a barrel body which is provided with a heat transfer medium inlet and a heat transfer medium outlet, wherein a first tube plate, a second tube plate and a core body positioned between the first tube plate and the second tube plate are arranged in the barrel body; two ends of the core body are respectively supported on the first tube plate and the second tube plate and respectively designed into a nozzle structure, and through holes are arranged on the lateral wall of each nozzle; a plurality of spiral tubes which are sleeved inside and outside and formed by reeling hollow tubes are arranged outside the core body, wherein the rotation directions of hollow tubes of the spiral tubes which are adjacent inside and outside are opposite, one end of the hollow tube of each spiral tube passes through the first tube plate and is then communicated with the heat transfer medium outlet, and the other end of the hollow tube of each spiral tube passes through the second tube plate and is then communicated with the heat transfer medium inlet; the inner end of a first connecting tube is communicated with a nozzle at one end of the core body so as to enable the outer end to be used as a material inlet end; and the inner end of a second connecting tube is communicated with a nozzle at the other end of the core body so as to enable the outer end to be used as a material outlet end. The invention provides the polymer reactor which has small energy consumption as well as full and even heat exchange, can prevent materials from backmixing on the flow direction and realize the temperature region segmentation.

The invention discloses a technology for manufacturing a mold core by using steel molding sand. The technology comprises the following steps: (1) coating the surface of a steel ball with phenolic resin, a curing agent and a lubricating agent so as to prepare the steel molding sand; (2) preparing a steel sand core part by using the steel molding sand according to a conventional sand core production method; (3) placing the steel sand core on a pre-processed location of an integral mold, and carrying out precoated sand core shooting, so that the steel sand core and a precoated sand core are combined so as to form the integral sand core. According to the technology, the steel sand core and the precoated sand core are combined so as to mold and manufacture the mold core; the steel sand core has high heat conductivity coefficient, is capable of increasing the speed of molten iron solidification and accelerating the solidification of molten iron around the steel sand core and replaces a chilling block; the combination of the steel sand core and the precoated sand core is capable of ensuring the uniform cooling speed of each part of a casting and improving the quality of the casting. In addition, the steel sand core has good collapsibility, is particularly suitable for a cavity in the casting and is easy to crush and outflow.

The invention discloses a casting method of a crank case. The crank case is produced from the following chemical components in percentage by weight: 2.6%-3.2% of C, 1.6%-2.2% of Si, 0.4%-1% of Mn, 0.06%-0.08% of S, 0.5%-1% of Cr, 0.8%-1% of Cu, 0.03% of Sn and the balance of Fe. The casting method comprises the operation steps: A, heating and melting the raw materials into a metal liquid at the melting temperature of 1480 DEG C-1500 DEG C; B, putting the metal liquid into a ladle when the metal liquid reaches 1420 DEG C-1450 DEG C, adding a nucleating agent, nucleating the metal liquid so as to obtain a casting liquid; and C, casting the casting liquid to a sand mold from a sprue at the casting temperature of 1320 DEG C-1330 DEG C, and condensing so as to obtain the crank case. Compared with the prior art, the problem of shrinkage porosity due to uneven cooling speed at the thickness junction part when the existing crank case is cast can be solved.