18 results about "Cast iron" patented technology

The present invention relates to a pair of handcuffs which cannot be disassembled easily by securing a firm connection therebetween by hinge members. The handcuffs according to the present invention are made by the methods of shearing and bent-up forming in replacement of the conventional cast-iron method, and are connected by a connecting structure which comprises two frame plates, each of which includes a plurality of hinge members forming grooves between the neighboring hinge members and having openings therethrough and also includes a pair of flat members; couplings fitted into the grooves of the hinge members; and hinge axes to be axially fitted into the openings of the hinge members and the couplings.

The invention discloses a boron-phosphorus alloy cast iron used for the cylinder body of an air compressor and a manufacturing process thereof. : Fe 94; C 3-4; Si 2-3; Mn 0.5-1.0; P 0.1-0.5; S 0.05-0.1; B 0.03-0.05. The manufacturing process of the present invention is: raw and auxiliary materials-pig iron, scrap steel-electric furnace smelting-tapping inoculation, inoculation with flow-filtering casting-finished cylinder body. The invention is suitable for making cylinder blocks of air compressors.

The invention discloses a deslagging agent used for smelting cast iron and a preparation method thereof. The deslagging agent comprises, by weight, 70%-75.2% of silicon dioxide, 12.1%-15.9% of aluminum oxide, 0.5%-1.9% of ferric oxide, 1.2%-3.22% of sodium oxide, 1.9%-3.84% of potassium oxide, 0.9%-1.48% of calcium oxide, 0.47%-1.46% of magnesium oxide, and the balance iron and inevitable impurities. The deslagging agent used for smelting the cast iron mainly comprises SiO2 and Al2O3 and can instantly expand when sharply heated to the temperature of 1100DEG C or over so as to form a viscous active material of a porous structure, so that molten iron, slag in the molten iron, and impurities can adhere together to be gathered; the deslagging agent has a low heat conductivity coefficient so that heat conduction and thermal radiation on the surface of the molten iron can be effectively reduced, and a heat preservation effect is achieved; and the problems, such as corrosive pits, white spotsand wrinkles, which occur frequently during cast iron machining are solved while the defects are overcome.

The invention relates to a double component rolling sand making cavity assembly for a cone sand making machine and a manufacturing method. The upper part of the rolled mortar wall is made of Mn13, the lower part of the rolled mortar wall is made of high-chromium cast iron, and a ring-shaped groove is formed in the outer wall or the inner wall at the lower part of the rolled mortar wall, and is in concave-convex fusion casting coordination with a ring-shaped groove formed in the inner wall or the outer wall at the upper part of the rolled mortar wall; the upper part of a crushing wall is made of Mn13, the lower part of the crushing wall is made of high-chromium cast iron, and a ring-shaped groove is formed in the outer wall or the inner wall at the lower part of the crushing wall, and is in concave-convex fusion casting coordination with a ring-shaped groove formed in the inner wall or the outer wall at the upper part of the crushing wall. The double component rolling sand making cavity assembly has the advantages that 1, the critical defects that in the sand making process on the rolled mortar wall and the crushing wall which are made of a single material, the abrasion losses on the rolled mortar wall and the crushing wall by stone materials in different specifications are different, so that the upper parts of the rolled mortar wall and the crushing wall are slightly abraded while the lower parts of the rolled mortar wall and the crushing wall are seriously abraded, then a groove is formed in a rolling sand making cavity, and the sand cannot be made, are solved radically; 2, the abrasion loss of the Mn13 at the upper parts of the rolled mortar wall and the crushing wall when the stone materials are crushed is in relative accordance with the abrasion loss of the rolling sand making cavity at the lower part of the high-chromium cast iron rolled mortar wall.

The invention relates to a roll tissue holder which is characterized by being composed of a base, a fixing rod, a rotary sleeve, a press cover, a tissue clamping member and a tissue anti-mess member, wherein the fixing rod is fixed at the middle of the base; the fixing rod is sleeved with the rotary sleeve; the press cover covers the upper end of the rotary sleeve; the tissue clamping member is fixed on the sleeve body of therotary sleeve; the tissue anti-mess member is mounted on the base; and the base is made of cast iron. With scientific and reasonable structure design, the roll tissue holder provided by the invention has the advantages of high stability, convenience in tissue taking, rare scattering of tissue and beautiful appearance and is a roll tissue holder with relatively high innovativeness.

The invention discloses a wear-resistant and shock-resistant coating and a preparation method thereof. The wear-resistant and shock-resistant coating comprises a porous ceramic layer covering the surface of a base material and a composite resin layer printed on the surface of the porous ceramic layer, the composite resin layer comprises a plurality of criss-cross coating units, each coating unit is formed by printing a TPE composite wire containing graphite powder and a TPE composite wire containing tungsten carbide at intervals, and all the coating units form a functional grid. A crossed space grid structure is established on the surface of a die-cast formed base material, and two or more specific materials with different properties are laid in the space structure in a penetrating manner,so that the abrasion resistance and the shock absorption performance of the surface of the die-cast magnesium alloy part are improved, and the base material can be selected from magnesium alloy, aluminum alloy, cast iron, cast copper, stainless steel and the like; and on the premise of not changing components of the base material, the wear resistance and shock absorption performance requirementsof the surface (especially a certain specific surface) of the base material are better met.

The invention discloses a production process of an environment-friendly water-based anti-corrosion coating. The production process comprises the following steps: adding deionized water and an SN-5027 water-resistant dispersant into a paint preparation tank, fully and uniformly stirring, further putting attapulgite, iron oxide red powder, aluminum tripolyphosphate, mica powder, an AMP-95 additive, a defoaming agent and the like into the paint preparation tank, uniformly stirring, then grinding by a sand mill to the fineness of not more than 30mu m, further adding a self-crosslinked and modified styrene-acrylate emulsion, a mildew-proof and anti-bacterial agent and other additives into the paint preparation tank, fully and uniformly stirring, regulating viscosity with the deionized water till the coating is qualified, filtering and packaging. The produced coating has the characteristics of high drying speed, great anti-rust and anti-corrosion properties, and excellent heat resistance, resistance to brine and resistance to a nitrocellulose coating, thereby meeting the requirements on a dip coating line of a cast iron housing of a diesel engine that emulsification-resistant cutting fluid, 30# mechanical oil and a hot washing solution at 90 DEG C have no sticking, decoloring and blistering and other quality indexes during soaking and rinsing.

The invention discloses all steel scrap smelting iron-casting system which comprises a feed inlet, a supporting rod, a molten iron box and a base, wherein a body is fixed below the feed inlet, and a first motor is arranged on the left side of the body; a rotary shaft is mounted at the right end of the first motor, and the right side of the rotary shaft is connected to a cone-shaped gear; the feedinlet is formed in the upper side of the supporting rod, and the supporting rod is connected to the inner wall of a scattering chamber; a smelting chamber is arranged below the scattering chamber, anda connecting pipe is mounted in the bottom of the smelting chamber; and the left end of a second motor is connected to a stirring shaft, and stirring blades are fixed around the stirring shaft. The all steel scrap smelting iron-casting system can accelerate molten iron cooling, the scattering chamber is arranged below the feed inlet, the connecting rod is arranged on the inner side of the scattering chamber, and the scattering blades are mounted around the connecting rod, so that steel and iron blocks adhered together are scattered, and therefore, the steel and iron smelting efficiency is accelerated.

The invention belongs to the technical field of automobiles, and relates to a manifold, in particular to a cast iron material which can improve the heat resistance of the automobile manifold so as to give full play to engine performance. The high-strength silicon-molybdenum alloy cast iron material can improve the heat resistance of the manifold, the manifold can work normally in the high-temperature and high-pressure environment of 1500 Fahrenheit degree, the manifold does not deform, the performance of an engine is exerted to the maximum extent, normal work of an exhaust system is protected, and the service life of the manifold is longer.

The invention relates to a coal-saving temperature-controlling fire seal for briquette boilers, which comprises a rectangular plate-like body (1) made of high temperature-resistant cast iron, a lifting ring (12) is arranged at the center of a top plate (11) of the body (1), a plurality of vertical reinforcing ribs (15) are downwardly arranged crisscross on a bottom plate (13) of the body (1), and a plurality of air-regulating doors (2) which respectively cooperate with each fire-sealing regulation air hole (16) and can adjust the opening degrees of the fire-sealing regulation air holes (16) are arranged on the body (1). The usage of the coal-saving temperature-controlling fire seal for briquette boilers can effectively control the burning speed and fire power of briquettes, and can control temperature to seal fire when temperature requirement is reached. During controlled slow burning and fire sealing, flammable gas can sufficiently burn, and harmful gas cannot be produced, so green emission is realized. Fire cannot go out, and fire still can be sealed when the hot water in the boiler cannot circulate due to power outage, water outage or water pump failure, so that safety accidents cannot be caused.

The invention relates to a method for recovering ferrum, vanadium, chromium and gallium from vanadium extraction tailings, belonging to the field of metallurgy. The technical problem solved by the invention is to provide the method for recovering the ferrum, the vanadium, the chromium and the gallium from the vanadium extraction tailings. The method comprises the following steps of: a. material mixing: evenly mixing the vanadium extraction tailings, a reducing agent, calcium oxide and binder in the weight ratio of 100:12-25:15-25:2; b. pelletizing: pelletizing the evenly mixed material in thestep a to obtain green pellets; c. primary reduction: reducing the green pellets at the temperature of 1000 DEG C-1200 DEG C to obtain metallized pellets; and d. smelting and deep reduction: carryingout smelting separation and deep reduction on the metallized pellets at the temperature of 1450-1600 DEG C to obtain slag and cast iron containing the vanadium, the chromium and the gallium. The method provides a novel selection for the utilization of vanadium, chromium and gallium resources in minerals and has wide application prospect.

A water jacket for the heating furnace is composed of internal wall made of gray cast iron, external wall made of weldable steel plate and sealing plates wrapped by convex rings on the external surface of internal wall, made of weldable steel plate, and welded to external wall. Its advantages are high corrosion resistance, long service life and low cost.

The invention discloses high-strength low-hardness alloy cast iron and a preparation method thereof, and belongs to the field of alloy cast iron. The preparation method comprises the following steps: mixing and grinding used sand, new sand and water in proportion, then adding auxiliary materials for mixing and grinding to prepare molding sand, taking the molding sand as a raw material for sand shooting and molding to prepare a parison, pouring molten liquid metal into the parison, and performing cooling to obtain the alloy cast iron. When the molding sand is prepared, the used sand is added as a raw material, so that under the condition that the performance is ensured to be qualified,the cost can be reduced, waste is turned into wealth, the emission of the raw material is reduced, and the environmental protection property is high.

The invention discloses a cast iron pillar for a motor. According to the invention, as for a cylindrical linear motor formed by the cast iron pillar, a rotor is installed in the stator, and the cast iron is formed by the cast iron pillar which is assembled by an integral unit segment with a kerf or groove; the overall cast iron pillar segment is made of ferromagnetic material, in which winding cavities for mounting windings and groove holes for lead wires and mechanical fixing are formed; the cast iron pillar is fixed by end covers which are part of the cast iron pillar and have a magnetic conducting function. Moreover, the cast iron pillar is cylindrical as a whole.

The invention discloses a smelting method of carbon-free sponge iron, belongs to the technical field of sponge iron smelting, and solves the problems that an existing high-purity iron preparation method is complex, high in production cost and low in productivity. The method comprises the following steps that: step 1, carbon-free sponge iron is prepared; step 2, carbon-free sponge iron and lime flux are added into a vacuum induction furnace under the normal pressure state and heated to be molten, and high-oxygen molten iron and molten slag are obtained after the materials are completely molten; step 3, the slag is transferred to a slag ladle from the vacuum induction furnace in a vacuum state, and the high-oxygen molten iron is transferred to a refining unit through an iron outlet of the eccentric furnace; step 4, a deoxidizing agent is sprayed into the high-oxygen molten iron of the refining unit through an Ar blowing and powder spraying unit, and high-purity molten iron is obtained; and step 5, the high-purity molten iron is cast in a vacuum environment, vacuumizing is stopped after casting is completed, and the high-purity cast iron is obtained. The smelting process of the sponge iron is shortened, the smelting efficiency of the carbon-free sponge iron is improved, and the quality of pure iron is improved.

The invention provides a method for increasing hardness of a cast-iron oil pumping unit reduction case. According to the method, the cast-iron oil pumping unit reduction case is produced by technological steps as follows: design of a casting system, manufacture of the casting system, liquid iron melting, high-temperature standing, charging in front of a furnace, instantaneous inoculation, castingthermal insulation and knockout, casting check and measurement and dissecting verification. With the adoption of the method, single casting, attached casting of samples and random dissection of the casting of a gray pig iron complex case are realized; experimental verification shows that strength, hardness and metallographic phase of the casting produced with the technological scheme meet international requirements; and compared with other methods, the gray pig iron casting adopts the casting system with steps of dispersing, multi-strand processing, bottom pouring, open mold filling and liquidiron filtering as well as a melting technological scheme with high equivalent carbon content, high carbon content, low silicon content, controlled Mn/S ratio and Cr-Sn matched low alloying, therefore, the casting quality meets the international requirements, and meanwhile, the casting cost is reduced.

The invention relates to a high-strength abrasion-resistant straw pulping machine abrasive disc. The abrasive disc includes a basic body which is made of low alloy gray pig iron and is excellent in shock resistance and toughness; and an abrasion-resistant layer is arranged on the basic body, and the abrasion-resistant layer is made of chrome cast iron with earth elements. The conventional abrasive discs with straight teeth inclining out of the abrasive discs cannot achieve even grinding of straw and can cause omission and loss; spiral abrasive teeth inclining at an angle are arranged on the abrasion-resistant layer, and then an even grinding effect can be achieved; dense saw teeth are arranged on the spiral abrasive teeth, and straw missed by the spiral abrasive teeth can be pulped continuously; the abrasive disc is arranged on a grinding machine through a through hole, the changed shape of the abrasive disc and optimization of the shapes of the teeth can improve the pulping efficiency, improve the fiber quality, and reduce power consumption; and secondary pulping can be avoided, the workload of workers can be reduced, the yield can be increased, and the economic benefits are increased.