39results about How to "Realize continuous casting" patented technology

The invention discloses a high-efficiency continuous casting method of controllable structure-controllable closed cell foam aluminum ingot, belonging to the technical field of continuous porous metal preparation. According to the method, the decomposition control on a foaming agent in a melting body is realized by changing the treatment means of the foaming agent, the continuous production not only greatly improves the production efficiency but also solves the problem of bubble-free layers during static casting, and the continuous production of the closed cell foam aluminum ingot is achieved by controlling the casting temperature, the casting speed and the cooling intensity in a continuous casting process; the sizes and the shapes of bubbles in an aluminum substrate are controlled by adding foaming agents which have different types, different additive amounts and different particle sizes and are subjected to different pretreatments, and a control method of the porous structure is relatively high in realizability and relatively meets the requirements on the product diversity in actual application. The method is simple in process and low in cost, achieves the continuous casting, greatly improves the production efficiency, relatively meets the industrialized requirements and can be used for efficiently and continuously preparing large-sized closed cell foam aluminum ingot.

The invention discloses an amorphous alloy double-belt type continuous casting machine and a continuous casting method thereof. The double-belt type continuous casting machine comprises a rack, an upper belt part and a lower belt part; the upper belt part and the lower belt part are both fixed to the rack; the upper belt part comprises a heating roller, a first supporting device, a second supporting device, a first tensioning device, a driven device and an upper steel belt; the lower belt part comprises a first distance adjusting device, a second distance adjusting device, a third distance adjusting device, a second tensioning device, a driving device and a lower steel belt; the portion, between the first tensioning device and the heating roller, of the upper belt steel and the portion, between the first distance adjusting device and the second distance adjusting device, of the lower belt steel form a molten pool used for containing amorphous alloy liquid; an inclined plane is formed between the upper steel belt and the heating roller, and two tangent lines tangential with a rotating roller of the driven device; another inclined bevel is formed between the lower steel belt and three tangent lines tangential with a rotating roller of the first distance adjusting device, the second distance adjusting device and the third distance adjusting device; and the two inclined planes areparallel to each other, and a coagulation area is formed between the two planes.

The continuous special-steel casting and rolling production process is combination of ultrahigh speed near-finish continuous casting technology and new generation steel rolling technology and can realize automatic whole-line control. It has high production efficiency, low power consumption and compact technological process; no need of protecting slag and lubricant during continuous casting, and synchronous motion of the crystallizer and billet casing. Starter head is used to block the bottom of the crystallizer during starting the continuous casting machine, and the billet casing demolded from the crystallizer is cooled in two sections and fed with holding roller to rolling and straightening machine for direct rolling. The present invention has compact technological process, reasonable matter flow and environment friendship and may be used in integrated production of special steel.

The invention provides a method for controlling a center porosity defect of bearing steel. Continuous casting adopts a weak cold system and low superheat and low drawing speed, a tundish adopts soft fire and automatic baking, electromagnetic stirring current intensity and frequency of a crystallizer are controlled, the heating charging temperature is smaller than 850 DEG C, the temperature of a soaking zone ranges from 1200 DEG C to 1220 DEG C, the heating total time is larger than or equal to 5 hours, high reduction rolling is adopted, the first two rolling reduction is controlled between 70mm and 80mm, and finished products are piled in a mode that multiple tanks are continuously piled in each steel tanks. By means of the method, continuous casting of the bearing steel can be achieved, slag blocking and control of oxygen content of tapping in the smelting process of a converter are not needed, special top slag modification treatment is avoided when refining is performed, the problem of water port blockage caused by impurities of the bearing steel can be effectively avoided, quality level of macrostructures of the bearing steel is greatly improved, inherent quality and using performance of bearing steel are improved, and the quality qualified rate of the bearing steel is increased.

The invention provides a rare earth treated low-cost high-toughness low-temperature pressure vessel steel plate and a production method thereof. The rare earth treated low-cost high-toughness low-temperature pressure vessel steel plate comprises the following components: 0.10-0.16% of C, 1.20-1.60% of Mn, 0.20-0.50% of Si, less than or equal to 0.020% of P, less than or equal to 0.005% of S, 0.015-0.025% of Nb, 0.010-0.020% of Ti, 0.020-0.040% of Alt, 0.0020-0.0040% of La+Ce, less than or equal to 20 ppm of O, the balance of Fe and unavoidable inclusions. Through the microalloy elements Nb andTi and trace rare earth alloy, the low-temperature toughness of steel is further improved. Rare earth steel is produced by strictly controlling the O content and the S content of molten steel, the Cacontent in the molten steel is kept at a high level through calcium treatment in the later period of smelting, continuous casting and batch production of the rare earth steel are achieved, and the problem that the rare earth steel is unstable in performance is solved.

The invention provides a continuous smelting and casting method of high-quality zirconium-containing magnesium alloy. The continuous smelting and casting method comprises the three continuous steps of high-density solvent refining for impurity removal, zero-impurity drag-in type degassing treatment and solvent-free efficient alloying, wherein rapid separation of a pure magnesium melt and slag is achieved through the high-density solvent refining for impurity removal, then degassing treatment is conducted on the refined pure magnesium melt by adding a zero-impurity drag-in paraffin-graphite degassing agent, finally the alloying is completed by adding a zinc element, magnesium-zirconium intermediate alloy subjected to isothermal forging deformation treatment and magnesium-rare earth intermediate alloy subjected to isothermal forging deformation treatment in a solvent-free crucible, and casting and forming of the high-quality zirconium-containing magnesium alloy melt are completed in a tilt rotating mode of the crucible. The continuous smelting and casting method meets the component ageing sensibility and high melt quality requirements of the zirconium-containing magnesium alloy, and the continuous smelting and casting method of the high-quality zirconium-containing magnesium alloy is low in inclusion content and low in melt gas content and capable of efficiently utilizing alloy elements and achieving continuous smelting and casting.

The invention discloses a short-flow continuous forming device for a tin-bismuth alloy welding wire. The short-flow continuous forming device comprises a melt heat-preserving furnace, a heat-preserving plate with a casting hole, a guide wheel, a water atomizer, a guide rod and a rolling mill, wherein the heat-preserving plate with the casting hole is fixedly connected to the side face of the melt heat-preserving furnace; the water atomizer is arranged on an upper part behind the casting hole; the rolling mill is positioned behind the casting hole; the guide rod is inserted into the casting hole, and is arranged on a traction machine; the guide rod passes through the guide wheel. By adopting the short-flow continuous forming device for the tin-bismuth alloy welding wire and a forming method provided by the invention, show-flow machining of the tin-bismuth alloy welding wire which is difficult to form is realized, and the production process is shortened remarkably.

The invention provides a continuous casting process of nickel coated copper composite materials. The continuous casting process comprises the following steps of smelting copper and nickel and performing heat preservation on a copper and nickel solution in a heat preservation furnace; step 2, performing nickel pipe forming which comprises enabling the nickel solution to pass through a graphite crystallizer to form a nickel pipe, wherein a graphite core of the graphite crystallizer is in a hollow shape; step 3, hollowly pouring the copper solution into the formed nickel pipe through the graphite core in a rotating magnetic field environment simultaneously, maintaining the billet drawing speed to be 50 to 60 millimeters every minute and the cooling water temperature to be 20 to 50 DEG C in the process of horizontal continuous casting, enabling the current frequency of an alternating induction coil to be 18 to 30 Hz and the current intensity of the alternating induction coil to be 100 A when the rotating magnetic field is applied and obtaining nickel coated copper continuous casting billet; step 4, performing oxidation cleaning; step 5, performing surface treatment; step 6, performing storage. According to the continuous casting process of the nickel coated copper composite materials, the nickel coated copper wires are firm in combination, the production process is simple, the wastewater is not produced in the production process, and the environment-friendly effect is achieved.

The invention discloses a method for upward traction continuous preparing of a copper, chrome, titanium and zirconium alloy rod. Fine copper and a copper chrome alloy raw material are placed into a crucible, are covered with charcoal, and are heated to be not lower than 1180 DEG C +/-5 DEG C and not higher than 1200 DEG C +/-5 DEG C, after an alloy is fused, copper titanium and copper zirconium alloy raw materials are added into the crucible and are subject to heat preservation and standing for not longer than 1 min, and the melt temperature is measured; and after melt reaches 1180 DEG C-(10*chrome mass percent+50*titanium mass percent+100*zirconium mass percent) DEG C, (the chrome mass percent in the alloy is not lower than 0.2 and not higher than 0.7, the titanium mass percent is not lower than 0.05 and not higher than 0.1, the zirconium mass percent is not lower than 0.05 and not higher than 0.2, and the balance is copper and impurities) the alloy is subject to upward continuous traction, and a continuous length copper, chrome, titanium and zirconium alloy rod material is obtained and rolled. According to the method, upward traction continuous casting of a copper rod by 100 m or above can be achieved, and the scale production and application prospect is achieved.

The invention belongs to the field of high-end equipment manufacturing, in particular to a hollow-ingot-continuous-casting-manufacturing-technology-based short-flow preparation process for a highly compact and purely purified thick-wall ring piece and a highly compact and purely purified thick-wall tube piece. The raw blanks of the thick-wall tube piece and the thick-wall ring piece are produced by a hollow ingot continuous casting technology, and the thick-wall ring piece and the thick-wall tube piece are produced by a ring roller machine and a forging press. Generally, the thick-wall ring piece and the thick-wall tube piece which have a large diameter is prepared from solid steel ingot by the steps of upsetting, punching, drawing-out, chambering and the like, the process is complex, themanufacturing period is long, and the heating frequency is high. The hollow steel ingot prepared by the technology has the characteristics of high compactness and purity degree, and provides high-quality raw materials for the high-end ring piece and the high-end tube piece. Through the hollow ingot continuous casting, the steps of upsetting and punching are saved, and the large-diameter tube piece and the large-diameter ring piece can be prepared only by the steps of drawing-out and chambering, the manufacturing period is greatly shortened, the heating frequency is reduced, and the short-flowmanufacturing of the high-end ring piece and the high-end tube piece is realized.

The invention belongs to the technical field of copper alloy machining, and relates to a covering agent applicable to smelting of a copper alloy containing easily oxidized alloying elements, and application of the covering agent. The coving agent consists of the following components in mass percent: 50-80% of sodium borate and 20-50% of cullet, wherein the sodium borate and the cullet are added respectively, and the cullet is added firstly, and then the sodium borate is added with the time interval not less than 10 min. Through the covering agent, vacuum smelting can be replaced by common smelting, the copper alloy containing easily oxidized alloying elements can be smelted by a common electric induction furnace, large-size ingot castings can be easily prepared and continuously cast, and the alloy quality of the copper alloy subjected to smelting is better. The covering agent related to the invention has the characteristics of low cost, environmental protection and energy conservation.

The invention relates to a broad-width horizontal multiple continuous casting device, which comprises a tundish and a horizontal chain plate-type aluminum and aluminum alloy continuous casting machine, wherein, the tundish is used for casting; a crystallizer with a water jacket, a horizontal chain scraper conveyor, an ingotting hold-down device, a dummy ingot device, a synchronous saw-cutting mechanism and a floating roller way are arranged in the horizontal chain plate-type aluminum and aluminum alloy continuous casting machine; in addition, the breadths of the tundish for casing and the horizontal chain plate-type aluminum and aluminum alloy continuous casting machine are not less than 1.5 to 6.5 m. The broad-width horizontal multiple continuous casting device widens the breadths of a traditional aluminum and aluminum alloy chain plate casting machine and the tundish for casing to more than 1.5 m, and correspondingly changes the aspects of aluminum feeding manner, the ingotting hold-down device, a synchronous saw-cutting device and the like at the same time, so that the broad-width horizontal multiple continuous casting can be achieved, and the production efficiency can be improved greatly.

The invention provides a vacuum vertical continuous casting machine for high-temperature metal and alloy. The continuous casting machine comprises a vacuum device, a smelting device, a heat preservation device, a crystallization forming device and a traction device. The vacuum device comprises a furnace body and an upper cover body, wherein an exhaust valve and an air inlet valve are arranged on the furnace body; the smelting device comprises a crucible, wherein the crucible is arranged in the furnace body, a heating coil is arranged on the periphery of the crucible, a stirring motor is arranged on the upper cover body, an output shaft of the stirring motor is connected with a stirring rod, and the lower end part of the stirring rod is connected with a stirrer; a discharge hole is formed in the lower part of the crucible; the crystallization forming device comprises a crystallizer, coolers and a heater, the crystallizer is arranged in the peripheral direction of a discharging port in the lower portion of the crucible, and the coolers are arranged on the periphery of the crystallizer; a heater is arranged at the periphery of the cooler; the traction device comprises traction wheels which are arranged in pairs.

The invention relates to an aluminum guide rod forming device, in particular to an aluminum guide rod casting device. The aluminum guide rod casting device comprises a melting furnace, and is characterized in that the lower part of the melting furnace is connected with a filtering box, and the rear part of the filtering box is sequentially connected with crystallizers, an endless conveyor belt and a synchronous saw. The aluminum guide rod casting device provided by the invention has the advantages as follows: the structure is simple; the problems of low one-step casting yield, length limitation and the like of aluminum guide rods are solved; the investment is low; the efficiency is high; the technological operation is convenient; the technological conditions are easy to control; continuous casting can be realized; the yield is high; the product quality is stable; the defects of gas pore, slag inclusion and the like of ingots are few; and the electric conductivity is excellent.

The large block amorphous alloy stepwise cooling continuous casting method includes: firstly, melting alloy material in crucible, heating to above melting point, heat-insulating, then removing plunger of crucible to make molten alloy flow out from cast gate of crucible bottom portion and flow into lower liquid flow disperser, quickly-cooling the dispersed fine-small molten alloy flow to about nasal tip temp. Tn of nucleation C curve, then pouring the low-temp. molten alloy into casting mould, further cooling to below vitrification point and condensing to obtain the invented amorphous alloy whose mechanical and physicochemical properties are identical to that of copper mould heavy cast amorphous material.

The invention discloses a casting process of a clay cylinder. The casting process of the clay cylinder includes following steps: manufacturing a metal mould of the clay cylinder; preparing a manufacturing tool; arranging a sprue gate, a riser and an air outlet on the mould; placing resin sand into the metal mould to mould the resin sand; patching the molded resin sand mould and painting the surface of the mould; arranging and assembling the resin sand mould; lifting a box of the resin sand mould; placing a sprue cup on the sprue gate of the mould, and placing a riser cup on the riser of the mould; and casting melted iron into a cavity of the resin sand mould by the aid of a crane ladle for grey chiller casting. The casting process of the clay cylinder has the advantages of high accuracy, saving in materials, simple steps, and improved production efficiency.