119results about How to "Smooth casting" patented technology

The invention discloses the composite of an environment-friendly rice flotable agricultural chemical preparation and a novel manufacture process thereof, which belongs to the field of farm chemical. The preparation is formed by compounding 0.1 to 50 percent of a weed killer, an insecticide, a fungicide or plant growth regulator active ingredients, 0.1 to 30 percent of a micropore sustained release agent, and 99.8 to 20 percent of a floatble carrier according to mass percentage. The preparation can effectively save the active ingredients by more than 70 percent, and can be directly applied on the surface of rice paddy field. The preparation has the characteristics of low cost, high efficacy, lasting drug action, safety, convenient use and so on, and is an environment-friendly agricultural chemical preparation.

The invention relates to an isothermal extrusion production method of a refractory metal rotating target material. During the preparation of the refractory metal rotating target material by adopting an isothermal extrusion process, a target material tube target blank needs to be pressed firstly by adopting CIP (Cold Isostatic Pressing), then a refractory metal or refractory metal alloy target blank with density of 60-80 percent is obtained through sintering, then the pre-sintered target tube blank is contained in an isothermal extrusion die, the high-density low-oxygen-content refractory metal rotating target material is obtained by adopting a relatively simpler isothermal extrusion production flow, the method is not limited by materials, the geometric size, surface quality, internal organization, physical property and the like of the entire target material can be enabled to be optimal, the production efficiency is greatly improved, the production cost is reduced, and the method is particularly suitable for producing refractory metal alloy rotating target materials which are difficult to produce by adopting other processes. The casting uniformity is high and the crystal gains are fine and tiny; the compactness is high and the density reaches more than 99 percent; the process is simple and the production cost is low.

The invention relates to a micro low carbon, low silicon, low phosphor, and low sulfur Al-Mg-Ca-Fe alloy used in steel-making. It uses as deoxidizer and contains 20-85wt% Al, 5-20wt% Mg, 1-15wt% Ca, C less than 0.02wt%, Si less than 1.0wt%, P less than 0.02wt%, S less than 0.02wt%, the rest is Fe. It is smelted from line frequency furnace. The invention has the advantage of easy to use, stable, and could improve the recovery factor of the metal element. The molten steel treated by the deoxidizer has good fluidity, high work rates, high benefits, etc. The deoxidizer could discharge the impurity, and it has good mechanical behavior, good quality, long useful life and good social benefit.

The invention discloses a casting mold for a cylindrical housing part comprising an outer mold (1), an inner mold (2), runners (4), a molding cavity (7) and risers (8). The outer mould (1) is composed of two half-mold bodies, the cylindrical inner mold (2) is located at the center of the outer mold (1); two runners (4) are arranges at both sides of the cavity (7), each runner (4) is connected to a buffer channel (5), each buffer channel (5) is connected with the molding cavity (7) through connecting channels (6), and both sides of the top of the molding cavity (7) are provided with a riser (4) each. The invention also discloses a casting method by using the mold. In the invention, molten aluminum is fully filled in the molding cavity, and the molten aluminum pressures of various parts of the molding cavity is balanced, so no crack is produced after the molten aluminum is cooled, the yield is high, the casting process is continuous and fast, and the efficiency is improved.

The invention discloses a method for producing 23MnB steel by adopting a vacuum process and belongs to the field of ferrous metallurgy. The invention aims at solving the technical problem of providing a method for producing 23MnB steel by smooth casting with a large-size continuous casting machine. The method comprises the following steps of: a, smelting in a converter; b, when steel tapping, adding calcium carbide in molten steel and then adding aluminum, so that the weight percentage content of acid-soluble aluminum in the molten steel is between 0.014% and 0.019%; c, refining in an LF (ladle furnace); d, after refining, carrying out vacuum circulation treatment, wherein in the treatment, aluminum is added into the molten steel so that the content of acid-soluble aluminum is 0.025-0.055%, titanium is added so that the content of titanium is 0.02-0.06%, and boron is added so that the content of boron is 0.0005-0.003%; and e, continuously casting. According to the invention, the content of acid-soluble aluminum is strictly controlled from various steps, the yield of boron is high, the hardenability of the 23MnB steel is good, and the water gap of the large-size continuous casting machine is prevented from being dwindled.

The invention discloses a method for controlling the nitrogen content of 20CrMnTi series gear steel with a high scrap ratio produced by an electric furnace process. The steel comprises the componentsin percentage by weight: 0.17%-0.23% of C, 0.17%-0.37% of Si, 0.80%-1.10% of Mn, less than or equal to 0.030% of P, less than or equal to 0.030% of S, 1.00%-1.30% of Cr, 0.010%-0.040% of Al, 0.04%-0.10% of Ti and the balance Fe and inevitable impurities. By reasonably controlling tapping carbon and tapping temperature of an electric furnace, selecting a reasonable technology route and key parameters, optimizing the addition amount of tapping aluminum blocks and slag charge, optimizing a refining operation technology and adopting argon sealing and an overall tundish for continuous casting, thetechnical indexes such as purity, hardenability and oxygen content of the steel for a gear are guaranteed while the nitrogen content is effectively reduced, and various technical requirements of usersfor high-grade gear steel are completely met.

The invention discloses a ladle nozzle casting drainage plug and a using method thereof. The invention belongs to an attachment device of the ladle for starting the casting operation, in particular to a drainage device used for casting molten steel by a brick cup nozzle at the bottom part of the ladle as well as a using method thereof. The drainage device includes a drainage agent and is characterized in that a plug cap and a plug post are connected into a cylinder with variable diameters; a plug cover is arranged on the plug cap; a bottom plate in a mushroom shape is arranged below the plug post; the drainage agent is packaged/or directly connected into the cylinder composed of the plug cap, the plug post, the plug cover and the bottom plate by a soft bag; the plug cap and the plug post are arranged in a guide rod in a sliding way; a haulage rope is hung on the bottom plate. When in use, the plug post is inserted and fixed into the brick cup nozzle; the plug cap is covered above the brick cup. During casting, the drainage agent drains under the effects of the heat and the gravity of the hot molten steel. The invention has the advantages of simple structure and easy manufacturing; being convenient for arranging the drainage plug for a short time; proper dosage of the drainage agent, high intensity, accurate position, large covering area, stable, safe and reliable mounting, avoiding residues from plugging the nozzle, saving the cost for treating the plugging of the nozzle and being beneficial to production.

This invention relates to a final deoxidizer for steelmaking, which is low-C, low-Si, low-P and low-S Al-Mn-Mg-Ca-F alloy. The alloy can be used as the final deoxidizer for steelmaking with good effect, and does not need further refinery of steel. The alloy comprises: C less than or equal to 0.2 wt.%, Si less than or equal to 1.0 wt.%, P less than or equal to 0.02 wt.%, S less than or equal to 0.02 wt.%, Al 40-50 wt.%, Mn 1.0-10 wt.%, Mg 0.1-10 wt.%, Ca 0.1-10 wt.%, and Fe as balance. This invention adopts main frequency induction furnace smelting to produce the final deoxidizer. The final deoxidizer has such advantages as high specific gravity, low melting point, no pulverization, good deoxidation and desulphurization effects, high yield, high fluidity of deoxidized molten steel, no nodulation, easy suspension of deoxidized product, low inclusion total content, high molten steel purity, good steel quality, fine grains, good mechanical properties, and long service life.

The invention discloses a centrifugal casting device and method for alloy steel casting and forging. The centrifugal casting device comprises a bottom plate, a second centrifugal casting cylinder is arranged in a fixing ring on the left side, a first centrifugal casting cylinder corresponding to the second centrifugal casting cylinder is arranged in a fixing ring on the right side, an output shaftof a second motor is provided with a crankshaft connected with a mounting frame, a sleeve is arranged on the outer side of the crankshaft, an injection hopper is arranged at the top of the mounting frame, a second casting pipe penetrating through the second centrifugal casting cylinder is arranged on the outer side of a first casting pipe, a casting port is arranged on the outer side of a secondcasting pipe, and a connecting rod is arranged between the second casting pipe and the sleeve. The second motor and the crankshaft are arranged, the crankshaft is driven to rotate by starting the second motor, the sleeve on the outer side drives the second casting pipe which is connected with the sleeve through the connecting rod to move leftwards and rightwards, the effect that the casting position is not fixed is achieved, casting is uniform, and casting quality is high.

The invention relates to the field of steel metallurgy technology, in particular to a production method of steel containing boron. When casting on a continuous caster, the steel containing boron produced by the method will not generate a lot of Al2O3 to obstruct a mold gap of the continuous caster. The production method of the steel containing boron comprises the following steps: primary smeltingof a steel liquid by a converter, steel tapping, ladle refining in a LF furnace, and casting. a, carrying out pre-deoxidation during the steel tapping process: pouring calcium carbide into the steel ladle to make the oxygen activity of the steel liquid to be less than 0.0025%; b, further deoxidizing when refining: adding 3.5-4.5kg of calcium carbide per ton of steel before refining and heating, and adding 0.15-0.45kg of metal aluminum pills per ton of steel during the heating process; c, firstly adding aluminium into the steel liquid after refining to make the content of aluminium in the steel liquid to reach 0.005-0.010%, then adding ferrotitanium to control titanium of the steel liquid within 0.020-0.035%, finally adding ferroboron to control boron within 0.0005-0.0035%. By the adoptionof the method, even a small dimension continuous caster of 200*200mm can also be used to smoothly cast the steel containing boron. In addition, the method provided by the invention is suitable for the casting of the steel containing boron by the use of continuous casters of all cross-sectional dimensions.

The invention discloses a precoated sand mold for casting a stainless steel thin-walled workpiece. The precoated sand mold comprises a cover mold, at least one intermediate mold and a bottom mold, which are arranged in order from top to bottom, wherein casting cavities are formed between the adjacent molds; a communicated vertical runner is formed in the cover mold, the intermediate mold and the lower mold; one end of the vertical runner is arranged on a pouring gate on the cover mold, and the other end blocks the bottom mold; the vertical runner is communicated with a transverse runner; the transverse runner is communicated with the casting cavities through auxiliary runners; the casting runners are communicated with exhaust vents. With adoption of the precoated sand mold disclosed by the invention, the stainless steel casting with the thickness of 2-3 mm can be casted; the casting is not liable to crack; the finished product yield is high.

The invention relates to a casting ladle with a molten iron flow control mechanism. The casting ladle consists of a ladle frame and a ladle, wherein the ladle is provided with a ladle spout. The ladle frame is provided with a vertical beam vertically and glidingly. A horizontal beam is arranged on the upper end part of the vertical beam. The horizontal beam is vertically provided with a check block on one end corresponding to the ladle spout. A motor driving the vertical beam to do vertical movement is arranged on the ladle frame at a position corresponding to the bottom of the vertical beam. The casting ladle adopts a central control system to send a signal to a servo motor using gears and racks to realize the vertical movement of the vertical beam according to digital revolution given by a controller, realizes precise multi-point positioning displacement control with a digital control signal, and can cast stably and precisely compared with the prior pouring mode of casting ladle. The casting ladle is suitable to be used for casting castings which are complex in shape and light in mass and volume and is suitable for adjusting iron flow during mass product casting.

The invention relates to a drum with a function of quickly opening a side cover. The drum comprises a body, the side cover and a damping structure. The damping structure further comprises a damping seat, a seat with magnetic blocks, a damping disc and an adjusting button, the damping disc is matched with the magnetic blocks. The drum is characterized by further comprising a resistance fine adjustment assembly and a rough adjustment assembly, the seat is supported on the damping seat, the fine adjustment assembly and the adjusting button are mounted on the damping seat, and the damping seat isclamped on the inner wall of the body; a mounting hole is formed in the side cover, the adjusting button can penetrate the mounting hole, an elastic clamp leg which axially extends is mounted on the inner wall of the side cover, a clamp seat is arranged on the damping seat, a bayonet which is clamped with the elastic clamp leg is arranged on the clamp seat, a button which is butted to a first spring is radially mounted on the body and corresponds to the bayonet, the tail of the button corresponds to the elastic clamp leg, and the elastic clamp leg can be driven to be separated from the bayonetalong with internal compression actions on the button. The drum has the advantages that the side cover can be quickly opened by means of operation by people with bare hands, and the drum is simple inintegral structure and convenient to operate.

The invention provides a split plate for casting an aluminum alloy composite round ingot blank. The split plate comprises a split plate body and at least three split openings formed in the split plate body, wherein the split plate body is round or square and is made of fire-resistant heat insulating materials. The split plate is matched with a round ingot crystallizer and has a hot top effect simultaneously, so that the heat gradient of aluminum liquid in the crystallizer in all directions can be distributed consistently, and the aluminum alloy composite round ingot blank is ensured to be cast smoothly.

The invention relates to movable balconies, in particular to an instrumentation platform system. The instrumentation platform system aims to solve the problem that a user cannot receive express deliveries conveniently when being away from home and further improve the room environment scientifically. The platform system comprises a main platform system B-3 and a vertical rail system B-1. A platform fixing triangular bracket supporting system B-2 is arranged under the main platform system B-3. The main platform system B-3 and the platform fixing triangular bracket supporting system B-2 are installed on the vertical rail system B-1 and can move up and down along the vertical rail system B-1 and be fixed in positions at different heights. By the adoption of the instrumentation platform system provided by the invention, the ordered express deliveries can be received quite conveniently in a remote control mode, and the room environment can be improved conveniently and scientifically.

The invention discloses a production method of a low-sulfur peritectic steel continuous casting round billet. The production method comprises the following steps that by using scrap steel and molten iron hot charging as a raw material, a raw material is sent into an electric arc furnace to smelt into molten steel, aluminum shots are added into the molten steel to perform primary deoxidation duringtapping, and lime and fluorite are added to perform slagging; during refining, a silicon carbide deoxidizing agent is added into the molten steel for slag surface diffusion deoxidization, white slagis produced during refining, the content of S and Al in the obtained molten steel is controlled, then the molten steel enters a refining furnace for vacuum degassing treatment, and after vacuum degassing treatment, the chemical components of the molten steel are adjusted to be controlled within a preset range; and finally, continuously casting the molten steel into a round billet. The molten steelis effectively desulfurized, the oxidability of the molten steel is reduced, the purity of the molten steel is ensured, the fluidity of the molten steel is improved, smooth casting in the continuouscasting process is ensured, smooth production is ensured, the working efficiency is improved, and meanwhile the surface quality of round billets is effectively ensured.

The invention relates to a uniform pouring mold for medical apparatus and instrument production. The uniform pouring mold comprises a baffle, a pouring cavity, a pouring gate opening, a supporting disc, a ball and a base plate. The pouring gate opening is placed at one end of the pouring cavity, the inner part of the pouring cavity is hollow, the supporting disc is a disc which is placed at the other end of the pouring cavity, the supporting disc is located at the center, the base plate is located directly below the supporting disc, one end of the ball is fixed to the supporting disc, the other end of the ball is in contact with the base plate, the baffle is placed at the other end of the pouring cavity, and the baffle surrounds the periphery of the supporting disc in an annular shape. Theuniform pouring mold is more convenient.