611 results about "Cast iron" patented technology

The invention provides a high-speed laser cladding metal ceramic coating, a cast iron brake disc and a preparation method and application of the cast iron brake disc. The high-speed laser cladding metal ceramic coating comprises the following preparation raw materials in percentage by mass: 40%-60% of stainless steel, 10%-20% of SiC, 10%-30% of ZrO2, 5%-10% of Ti and 1%-2% of CeO2. According to the coating, the hardness, the wear resistance, the friction coefficient and the toughness of a cast iron matrix can be remarkably improved, and the braking requirement of a motor vehicle under the extreme working condition can be well met. The invention further provides the cast iron brake disc and a preparation method and application thereof.

A brake disc for a disc brake may have a braking band made of gray cast iron or steel, provided with two opposite braking surfaces, each of which defines at least partially one of the two main faces of the disc. The disc is provided with a base layer constituted by steel having a nickel content of at most 15% which covers at least one of the two braking surfaces of the braking band.

The invention discloses a cast iron cylinder sleeve structure and alloy component optimization method based on friction and wear performance prediction, and belongs to the technical field of material science and machine manufacturing. The problems that a traditional cylinder sleeve alloy design method is low in efficiency and the material performance of the designed cylinder sleeve alloy is limited are solved. The method comprises the following steps: collecting an existing large-cylinder-diameter engine sample, and carrying out metallographic characterization and microhardness test on an engine cylinder sleeve to obtain cylinder sleeve structure characteristics and alloy component data; the wear volumes of different parts are obtained through a friction wear experiment, and then the wear rate is calculated based on the wear volumes. After tissue characteristic data, alloy component data and frictional wear test data of the cylinder sleeve are collected, the data are imported into different machine learning models, the models learn the corresponding relation between the tissue characteristic data and the frictional wear performance of the existing cylinder sleeve, and optimization of material tissue and alloy components is guided according to the prediction result of the optimal model. The method can be applied to optimization of cylinder sleeve structures and alloy components.

This invention relates to the field of casting molding technology and discloses a casting molding device for producing high-chromium cast iron wear-resistant materials. The device includes a machine body, a feeding hopper at the top of the machine body, a cylinder on the outer wall of the machine body, a dropping chamber at the bottom of the machine body, a discharge port on the outer wall of the machine body, a right mold on the inner wall of the machine body, a left mold at the output end of the cylinder, and a pop-out mechanism inside the right mold. The feeding hopper includes a screw, a device block, a limiting rod, a funnel, an exhaust pipe, a fixing rod, and a flow channel. The screw is rotatably connected to the outer wall of the machine body. As the left mold contracts, the material moves towards the cylinder. At this time, the vibrating rod resets, causing the elastic column to strike the inner wall of the left mold, causing it to vibrate and fall into the dropping chamber below. This avoids the labor costs incurred during manual material handling, thereby improving production efficiency.

The application relates to the technical field of cutting equipment, and particularly discloses a positioning cutting device for grey cast iron production, which comprises a main body structure, a locking unit, a cutting unit and a distance adjusting structure. The locking unit is fixedly arranged on the main body structure, the cutting unit is movably arranged on the main body structure, and the distance adjusting structure is fixedly arranged on the main body structure. The first motor in the main body structure drives the first gear to mesh with the first gear seat, so that the distance between the clamping frames can be flexibly adjusted, and the grey cast iron workpieces and the workbench surface with different width specifications can be accurately matched. The modular series connection design of the third gear seat in the distance adjusting structure further expands the cutting range and adjusts the boundary. Meanwhile, the device has two modes of handheld construction and bench surface fixation, and can meet the multiple requirements of regular workpiece batch cutting, irregular workpiece special-shaped cutting and special position fixed-point cutting.

This utility model relates to the field of cast iron pot mold technology and discloses a multi-temperature zone circulating preheating heating device for cast iron pot molds. It includes a base, with support columns symmetrically fixedly connected to the top of the base in all directions. A fixed seat is fixedly connected to the top of each of the four support columns. A pressing and heating mechanism is provided on the top of the base. Multi-temperature zone differentiated heating is achieved through a combination of an electromagnetic induction coil and an infrared radiation heating tube. The electromagnetic induction coil is arranged between the bottom of the lower mold base and the inner mold, using the principle of electromagnetic induction to rapidly heat the bottom of the mold, suitable for efficient heating of thick-walled parts of the cast iron pot mold. The infrared radiation heating tube is located between the lower mold base and the inner mold, above the heat insulation ring, and can uniformly radiate heat to the sidewalls of the mold. The combined effect of these two methods significantly shortens the preheating time compared to traditional single heating methods, while simultaneously meeting the temperature requirements of different parts of the mold, effectively improving production efficiency.

The application discloses a COG binding machine with buffer material online recovery and cast iron framework, and relates to the field of liquid crystal module assembly equipment.The device comprises a rack, a feeding unit, an ACF attaching unit, a pre-pressing unit, a main pressing unit, a discharging unit and a mechanical hand carrying system.The support frame of the main pressing unit is integrally cast from cast iron material and is internally provided with a reinforcing rib structure;the buffer material supply and recovery mechanism with the front release and rear collection structure comprising a floating roller and a tension sensor is arranged below the main pressing platform, so that the flexible buffer material is automatically supplied online, the tension is adjusted in real time and the waste material is recovered;the mechanical hand carrying system adopts a linear motor to drive the X shaft and four groups of independent mechanical hand modules, cooperates with a position detection sensor array and a multi-axis cooperative control module to realize multi-process parallel operation and anti-interference.The application effectively solves the problems of the existing device, such as frequent replacement of the buffer material, influence of thermal deformation on precision and interference of multiple mechanical hands, significantly improves the binding yield and production rhythm, and is suitable for efficient mass production of LCD screens.

The invention relates to a method for purifying molten iron in a furnace based on a decomposable foaming sand core, and belongs to the technical field of foundry metallurgy. According to the method, an alkaline phenolic resin sand core internally provided with sodium bicarbonate is adopted, and the alkaline phenolic resin sand core extends into the position, 100-200 mm away from the bottom, in the furnace through a special clamp in the molten iron standing stage. Sodium bicarbonate in the sand core is slowly decomposed at high temperature to release a large number of microbubbles, and non-metallic inclusions in molten iron are effectively captured and brought out in the floating process. Deep and uniform purification of the molten iron is achieved through a slow-release foaming mechanism, the purity of the molten iron and the casting quality are remarkably improved, and the method has the advantages of being easy and convenient to operate, low in cost and free of additional equipment and is particularly suitable for the production process of cast iron smelting in an intermediate frequency furnace.

The utility model provides a pipe clamping device which comprises the components of a support which is provided with a clamping groove, the width of the clamping groove from a groove opening to a groove bottom is gradually reduced, and the clamping groove is used for placing a pipeline; and the pressing rod assembly is movably installed on the support, a pressing block is arranged on the pressing rod assembly, and the pressing rod assembly can be adjusted and fixed to the position where the pressing block tightly presses the pipeline in the clamping groove in the vertical direction. Axial and radial displacement of the pipeline is restrained through vertical pressure of the pressing block. And by adjusting the size of the clamping groove, the device can be suitable for pipelines with different pipe diameters. Meanwhile, the pipeline clamp is made of common light metal plates, and compared with an original cast iron pipeline clamp, the pipeline clamp is easier to maintain, lower in weight, capable of being disassembled and assembled manually and flexible to use.

The invention belongs to the field of metal material modification and roller manufacturing, and particularly relates to a production method of a double-element alloying modified carbide high-chromium cast iron roller for rod and wire rolling. Paving ferrotitanium at the bottom of a ladle, smelting molten iron on the outer layer of the roller by adopting an intermediate frequency furnace, and discharging when the components reach the standard and the temperature of the molten iron reaches 1460 + / -20 DEG C; after the molten iron subjected to titanium alloying treatment is subjected to slagging-off treatment at a tapping station, Ce particles are packaged in a hollow iron sheet pipe, the hollow iron sheet pipe is inserted into the molten iron after the two ends of the hollow iron sheet pipe are closed, and mechanical stirring is conducted for 1-3 minutes; and when the temperature of the molten iron subjected to Ti and Ce double alloying is reduced to 1440-1450 DEG C, the molten iron is poured into a rotating mold at a constant speed for centrifugal pouring. The size and distribution of carbides are modified mainly through double-element alloying, the abrasion resistance of the slitting roller is improved, the protection effect of a matrix on the carbides is enhanced, the toughness of a slitting blade is improved, the tipping occurrence rate is reduced, and therefore the rolling efficiency is improved.

The invention discloses a magnetic positioning clamp for a laser marking machine and a using method of the magnetic positioning clamp, and belongs to the technical field of laser marking equipment. The clamp comprises a base, a magnetic base and a positioning block; the base is a cast iron block with a flat surface, is used for supporting an impact sample and is manufactured by machining a scrapped sawing machine sliding block; the magnetic base is arranged on one side of the base, is provided with a magnetic closing knob, is used for switching a magnetic state and a non-magnetic state, is adsorbed and fixed on the base through magnetic force, and forms three positioning surfaces with the positioning block and the base; the impact sample is accurately positioned and fixed through the matching of the three parts; the base is non-magnetic when not magnetized, so that scrap iron is prevented from being gathered to affect positioning. The invention further discloses a using method of the clamp. The using method comprises the steps of placing an impact sample against the positioning block, twisting the knob for fixing, performing laser marking, demagnetizing and unloading and the like. The device is suitable for marking the end part of the steel physical property impact sample, is simple in structure, low in manufacturing and using cost and short in clamping time, and ensures stable marking quality and personnel safety.

The disclosure relates to a process for producing molten iron or an alloy thereof from low- carbon direct reduced iron (DRI) in an electric arc furnace (EAF). The DRI comprises less than 0.1 wt% carbon. The process comprises a combined charging and melting stage comprising continuously charging DRI to a molten metal bath in the EAF and concurrently operating the EAF to continuously melt the DRI. During this stage, the process is maintained within the following operational window - bath temperature of from about 1580 °C to about 1750 °C; - FeO in slag of from about 25 wt% to about 40 wt%; - slag B2 basicity of from about 1.5 to about 3.5, wherein the B2 basicity is calculated as (wt% CaO) / (wt% SiO2); - MgO in slag of from about 8 wt% to about 13 wt%; and - carbon monoxide (CO) in offgas > 26 Nm3 / h / m2.

The application discloses a cast iron enamel high-temperature matte glaze without fluorinated salt and nitrate, and a preparation method and application thereof, and belongs to the technical field of enamel. The matte glaze is prepared from quartz, borax pentahydrate, titanium dioxide, sodium carbonate, calcium carbonate, barium carbonate, aluminum oxide, sodium tripolyphosphate, potassium carbonate and lithium carbonate according to specific mass proportions. The preparation comprises raw material mixing, smelting at 1300+ / -10 DEG C under a pure oxygen environment, and rapid cooling after wire drawing detection of the smelting state. The matte glaze completely avoids the use of fluorinated salt and nitrate, eliminates the problems of fluoride emission and environmental protection equipment blockage from the source, and the fluorine content of the product is not detected through detection, thereby meeting the limit value requirements of the EU REACH regulation. Meanwhile, the matte glaze has good enamel surface, excellent firing performance and matte performance, is suitable for a cast iron substrate, has a firing temperature of 780-800 DEG C, and can be used for the production of green and environmentally-friendly enamel products.

The invention discloses a blast furnace slag flushing water chute and a wear-resistant lining for the chute, and relates to the technical field of blast furnace equipment, the water chute comprises a dry slag layer, a common concrete layer, a water slag cast iron lining and the wear-resistant lining; the common concrete layer and the grain slag cast iron lining layer are lower than the dry slag layer and higher than the wear-resistant lining layer; the bottom of the cross section of the wear-resistant lining is arc-shaped, and the radius R of the arc is more than or equal to 200mm and less than or equal to 400mm; the wear-resistant lining layer is provided with a sawtooth-shaped convex body; and a steel wire mesh is laid between the wear-resistant lining layer and the water slag cast iron lining layer. The wear-resistant lining for the chute is formed by mixing and pouring high-strength concrete and scrap iron filler according to the mass ratio of 1: (0.2-0.8), and the particle size of the scrap iron filler is 1-10 mm. The strength grade of the high-strength concrete is not lower than C60. The blast furnace slag flushing water chute can solve the problems that an existing blast furnace slag flushing water chute is poor in structural integrity, a chute lining is prone to abrasion and damage, maintenance is difficult, and cost is high.

The utility model discloses an environment-friendly cast iron gasification combustion chamber, which relates to the technical field of kitchen ware devices and comprises a base, the upper surface of the base is fixedly connected with a combustion box body, the right side of the combustion box body is fixedly connected with a waste heat recovery box, and the upper surface of the combustion box body and the upper surface of the waste heat recovery box are fixedly connected with a supporting plate. And a box door is fixedly mounted on the left side of the upper part of the combustion box body. According to the environment-friendly cast iron gasification combustion chamber, under the action of the triangular supporting legs and the first air inlet holes, air can enter the inner cavity of the upper portion of the combustion box body through the fixing frame, and then the air enters the inner cavity of the upper portion of the combustion box body through the fixing shell; according to the energy-saving and environment-friendly furnace, the triangular supporting legs are arranged, air in the triangular supporting legs can enter the inner cavity of the combustion box from the upper portion along the second air inlet holes, oxygen can evenly enter the combustion box under the action of the first air inlet holes and the second air inlet holes, and therefore combustion is more sufficient, smoke discharged during combustion is extremely low, and the furnace is more energy-saving and environmentally friendly.

1.The name of the design product: cast iron pot (Zhuang nationality). 2.The use of the design product: used for containing food and cooking food. 3.The design points of the design product: in shape. 4.The picture or photo that best indicates the design points: perspective view. 5.The rear view, left view and right view are symmetrical with the front view, and the rear view, left view and right view are omitted.

The high-hardness and high-wear-resistance alloy roller comprises a roller body and a roller shaft penetrating through the roller body, and the roller body comprises an inner cast iron layer and an outer alloy layer covering the upper portion of the cast iron layer. The alloy layer is prepared from the following raw materials in percentage by weight: 3 to 3.7 percent of carbon, 0.7 to 1 percent of silicon, 0.6 to 0.9 percent of manganese, 0.3 to 0.7 percent of phosphorus, 0.005 to 0.02 percent of sulfur, 2.7 to 3.5 percent of chromium, 3.2 to 3.8 percent of nickel, 0.5 to 0.6 percent of molybdenum and the balance of iron and inevitable impurities; meanwhile, the invention discloses a preparation method of the alloy roller. Through precise design of components of the alloy layer and composite reinforcement of carbon, chromium, nickel and molybdenum, the hardness, toughness and wear resistance of the working layer of the roller are remarkably improved, stripping and fracture are effectively prevented, and the service life is prolonged.

The utility model relates to a punch structure which comprises a cylindrical punch body. A plurality of groove bodies extending in the circumferential direction are formed in the outer circumferential side face of the punch body, copper alloy layers are fully laid in the groove bodies in an embedded mode, and the outer side faces, in the radial direction of the punch body, of the copper alloy layers are flush with the outer circumferential side face of the punch body. The groove bodies can be closed-ring-shaped groove bodies, all the groove bodies are arranged at intervals in the axial direction of the punch body, and the groove bodies extending in the circumferential direction can be integrally and spirally communicated with one another. According to the punch structure, the punch body made of cast iron can still be adopted, the copper alloy layer is overlaid in the groove body, the outer side face is processed to be flush and smooth, the abrasion resistance of the cylindrical face of the punch body in the using process can be greatly improved, the copper alloy layer is embedded in the groove body and restrained by the groove body, and the connection stability is good and the shape retention degree is high in the using process. According to the punch structure, the manufacturing cost is relatively low, the wear resistance of the punch is effectively improved, and the service life of the punch is prolonged.

The invention discloses a cast iron white sample preparation method for direct-reading spectrometry detection, a mold and a processing device thereof, and relates to the technical field of metal material analysis and detection, the cast iron white sample preparation method comprises the following steps: S1, under the protection of high-purity inert gas, rapidly melting a cast iron sample by using a high-frequency induction heating device; and S2, the completely-molten metal liquid is rapidly poured into a mold internally provided with a forced water cooling system. According to the preparation method of the cast iron white sample for direct-reading spectrometry detection and the mold, high-frequency rapid melting and ultra-rapid cooling of the water-cooling copper mold are combined, graphite precipitation is fundamentally inhibited, even for high-carbon-equivalent cast iron, it can be guaranteed that 100% of a full white structure is obtained, the problem that carbon and silicon elements are not detected accurately in spectral analysis is thoroughly solved, and the production efficiency is improved. The prepared sample is uniform and compact in structure, free of defects such as shrinkage porosity and pores and high in component representativeness, and the reproducibility and accuracy of direct-reading spectrum analysis are greatly improved.

The utility model provides an automatic ladle slag removal device for nodular cast iron pipe production, and relates to the technical field of nodular cast iron pipe production, the automatic ladle slag removal device comprises a hoisting assembly and a bearing feeding and discharging component, the bearing feeding and discharging component assembled by bolts is arranged on the inner side of the lower portion of the hoisting assembly, and a cleaning mechanism is arranged at the output end of the inner side of the hoisting assembly. The feeding and discharging bearing part comprises an annular sleeve seat, a hinged movable strip, a ladle cylinder, an output nozzle, a hinged base, a pull rod, a hydraulic telescopic arm and an electric hinged seat; the annular sleeve seat is arranged on the inner side of the lower part of the hoisting assembly; according to the cleaning device, the first matching plate at the output end of the first hydraulic cylinder is mainly utilized to move into a ladle cylinder, and dirt which is difficult to scrape can be scraped through rotation of the rotating motor, the rotating sleeve, the servo motor, the vertical cleaning knife and the transverse cleaning knife; and an electromagnetic suction plate on one side of the second anastomosis plate can adsorb the cleaned iron dirt, so that the cleaning efficiency of the equipment is improved.

This invention discloses a laser cladding method for the inner wall of a brake drum, belonging to the field of laser cladding technology. The method specifically includes: horizontally clamping the brake drum, keeping its gray cast iron inner wall axially horizontal, and positioning a laser cladding head inside the brake drum and above its central axis; performing laser cladding using a synchronous powder feeding method, controlling the laser cladding head to translate along the axial direction of the brake drum while simultaneously rotating the brake drum around its axis, thereby forming a continuous spiral coating on the inner wall surface of the brake drum. This invention breaks through the traditional single mode of surface strengthening of gray cast iron that relies solely on welding or spraying, and can adaptively combine with heat sources such as laser cladding to construct a multi-layer interface with gradient composition / structure, providing a universal platform for the industrially scalable development of long-life, low-carbon remanufactured brake drums.

The present invention relates to a kit comprising a first component of a polyisocyanate and a second component of a mixture of polyaspartic esters. It also relates to a coated pipe or tank element comprising a coating formed from such a kit, as well as a pipe or tank comprising one or more of these coated pipe or tank elements. Furthermore, it relates to a method for protecting a raw cast iron, steel, or concrete pipe or tank element using such a kit.

The technical scheme belongs to the technical field of clutch accessories, and particularly relates to a clutch pressure plate which comprises a cast iron plate. The outer side of the lower surface of the diaphragm spring is erected on the cast iron disc, a plurality of spring windows are formed in the surface of the diaphragm spring, an elastic piece is formed between every two adjacent spring windows, and the elastic pieces can swing after being stressed; the fastening piece is arranged on one side of the swinging end of the elastic piece; the clamp spring is arranged on the fastener and located on the other side of the elastic piece, and the clamp spring is used for being matched with the fastener to limit the elastic piece; the clutch cover is matched with the cast iron disc and is used for limiting the diaphragm spring; wherein the swinging end of the elastic sheet is provided with a chamfering inclined plane, and the clamping spring is movably arranged on the chamfering inclined plane; a plurality of fixing parts are arranged on the fastener, after the fastener is installed, the fixing parts penetrate through the elastic pieces from bottom to top, and the clamping springs are arranged in the fixing parts.

The invention relates to the technical field of cast iron, and discloses a molten iron smoke removal device for cast iron, which comprises a cast iron assembly and a smoke removal cover arranged above the cast iron assembly, an intermediate frequency furnace and a steel ladle are arranged on the inner side of the cast iron assembly, and a lower support box and a side support box are fixedly mounted at the bottom and one side of the smoke removal cover respectively; a first rail extending to the position below the lower supporting box is fixedly installed on one side of the cast iron assembly, and a second rail corresponding to the side supporting box is fixedly connected to the position above the cast iron assembly. Through the smoke removal cover and the smoke removal pipeline, when the butt joint sleeve extends into the fixing sleeve, the butt joint sleeve can be attached to the inner wall of the fixing sleeve, the gap is small after butt joint, and the smoke removal effect is good. According to the smoke dust removal device, the smoke dust removal cover is simple in structure and not prone to air leakage, the smoke dust removal pipeline can fully absorb and remove generated smoke dust, the baffle can be automatically opened and closed, the discharged smoke dust is prevented from flowing back, and the smoke dust removal cover can move more stably and efficiently.

The invention discloses a high-chromium polyhedral grinding medium and a preparation method thereof, and belongs to the technical field of material processing. A strengthening area is limited in a spherical crown body with the vertex as the center and the radius not larger than 0.5 mm, a WC-Co particle array gradient strengthening structure is constructed in the area, and the concentration of the WC-Co particle array gradient strengthening structure is in exponential attenuation distribution C (x) = C0.e-0. 2x from the vertex center to the edge direction. The diameter of the WC-Co particles is controlled within the range of 0.05-0.1 mm, and the surfaces of the WC-Co particles are wrapped with transition interface layers which are composed of Cr3C2 particles and have the thickness of 0.02-0.05 mm. The problem of fracture caused by vertex stress concentration is effectively solved, the wear resistance and the service life of the grinding medium are remarkably improved, meanwhile, interface stripping failure caused by a strengthening structure is avoided, the method is compatible with an existing high-chromium iron process, the industrialization implementation cost is increased limitedly, and the method is suitable for industrial production. And a more reliable and efficient grinding medium solution is provided for an industrial ball milling system.

The invention discloses an economical high-chromium cast iron alloy suitable for a composite lining plate of a large ball mill. The economical high-chromium cast iron alloy comprises the following chemical components in percentage by mass: 2.7-3.2 wt% of C, less than or equal to 0.8 wt% of Si, 0.4-0.8 wt% of Mn, 25-29 wt% of Cr, max 0.5 wt% of Mo, max 0.5 wt% of Cu, max 0.5 wt% of Ni, less than or equal to 0.05 wt% of P, less than or equal to 0.03 wt% of S and the balance of Fe and inevitable impurities. The alloy is of a martensite, blocky carbide and a small amount of retained austenite structure, and the blocky carbide is distributed in a matrix in a dispersed continuous net form, so that the hardness and wear resistance of the material are improved while certain impact toughness of the material is guaranteed, and the service life of the material is prolonged. And the manufactured high-chromium cast iron alloy is high in wear resistance, high in yield, stable in production process, long in service life and low in cost.

The invention relates to the technical field of metal product preparation, and discloses a manufacturing process of a high-strength wear-resistant alloy cast iron pan, which comprises the following steps: respectively carrying out magnetic separation impurity removal on a basic raw material and titanium powder, then carrying out vacuum roasting, cooling and discharging to respectively obtain pre-treated pig iron, pre-treated carbon steel and pre-treated titanium powder; preheating an induction furnace, adding the pretreated pig iron, and raising the furnace temperature until the pretreated pig iron is completely molten; then adding the pretreated carbon steel and the reinforced alloy, starting electromagnetic stirring, then adding the pretreated titanium powder, and continuously stirring after adding to obtain a melt; a composite inoculant is added into the melt and stirred, then molten iron is poured into a heat preservation launder for pouring, demolding is conducted after heat preservation, and a pot blank is obtained; the pot bottom and the pot body of the pot blank are subjected to partitioned cooling, then overall cooling and vibration aging treatment are conducted, and then natural cooling is conducted to the room temperature; and after the cooled pan blank is ground and polished, the pan blank is coated with a composite ceramic coating, and the high-strength wear-resistant alloy cast iron pan is obtained.

The application provides a high-strength gray cast iron diesel engine body without riser casting forming method, and belongs to the casting technical field.The method is designed from the parting surface, pouring system, riser, cold iron, scale reduction and smelting process parameters; and comprises the following steps: selection of the parting surface: the diesel engine body adopts a horizontal casting type, the cylinder hole surface is located on the side surface, and the two-opening box casting mode is arranged on the crank hole; pouring system design: an open bottom pouring system with a filter is adopted; riser design: no riser is designed at the highest point of the pouring position of the diesel engine body, only air outlet fins are arranged on the two sides, and an air outlet rod is arranged at the middle large plane position; cold iron design: no cold iron is used at the position with uneven wall thickness of the diesel engine body; scale reduction design: the scale reduction is determined as 1.1%; and smelting process and parameters.The application has relatively high strength and hardness, can improve the shock resistance, wear resistance and heat dissipation performance, and can also reduce the production cost.

The utility model relates to the technical field of pipelines, in particular to an anti-blocking cast iron three-way pipe which comprises two pipe bodies, a cleaning assembly and a connecting assembly. The cleaning assembly comprises fixing seats, limiting blocks, rotating plates and brush bodies, the multiple fixing seats are fixedly connected with the pipe body and located in the pipe body, the multiple limiting blocks are slidably connected with the fixing seats and located in the fixing seats, the multiple rotating plates are slidably connected with the fixing seats and located in the fixing seats, and the brush bodies are arranged on the rotating plates. The multiple rotating plates are fixedly connected with the limiting blocks respectively and located in the middle of the fixing base respectively, the multiple brush bodies are fixedly connected with the rotating plates respectively and located on the outer sides of the rotating plates respectively, and the connecting assembly is connected with the pipe body. And the inner wall of the three-way pipe is easy to adhere after long-time use, so that the three-way pipe is blocked.

The application relates to the technical field of special functional coating materials for lost foam casting, and particularly discloses a cast iron lost foam and universal coating for full mold casting and application thereof. The cast iron lost foam and universal coating for full mold casting comprises quartz powder, calcined bauxite, modified fly ash microbeads, microcrystalline graphite and an additive; the modified fly ash microbeads comprise fly ash and a composite coating layer coated on the surface of the fly ash, and the composite coating layer comprises aluminum oxide nanosheets and magnesium ion doped amorphous substances. Through functional design of key components, the coating can dynamically adjust its performance according to the temperature and chemical environment of the contact interface, can meet the high air permeability requirement of the lost foam process, can take into account the differentiated requirements of different cast iron materials on high-temperature strength, permeability resistance and interface purity, and can be compatible with both conventional negative pressure and non-negative pressure conditions, so that the universal coating is realized, and production management and supply chain processes are greatly simplified.