46results about How to "High tissue density" patented technology

The invention belongs to the technical field of metallurgy, and particularly relates to a process for controlling center porosity of a large and round continuous casting billet. The process comprises steps as follows: qualified molten steel in tundish is injected into a mold through a four-slitting sided cyclone submerged nozzle; mold fluxes are added, and the depth of the submerged nozzle of the mold is controlled to range from 110 mm to 130 mm; a mold liquid level automatic control system is used for stabilizing a mold liquid level and a pulling rate, and the superheat degree of the molten steel in the tundish is stabilized; the secondary cooling speed of a casting billet is controlled; and M-EMS (mold electromagnetic stirring) and F-EMS (final electromagnetic stirring) parameters are optimized. With the adoption of the process, the large and round billet is produced, melting of the mold fluxes is facilitated, the temperature gradient from a billet shell to molten steel at the core part of the casting billet can be reduced, the overheat degree of the molten steel in the center is decreased, the isometric crystal proportion of the casting billet is increased, the tissue density of the casting billet is increased, and the grade of the center porosity of the large and round continuous casting billet can be controlled.

The invention relates to a furnace building method of an intermediate-frequency induction furnace for copper alloy smelting, which comprises the following steps: firstly, preparing a lining material of a furnace-body outer lining and a fire-door lute, and laying a layer of epoxy plate and placing an induction coil on an asbestos board base; laying a glass fiber fabric on the inner wall of the induction coil and the epoxy plate, so that the glass fiber fabric is formed into a pocket shape; hierarchically adding the lining material of the furnace-body outer lining into the glass fiber fabric pocket, and hierarchically tamping and knotting the obtained product so as to form a furnace bottom; then, placing a graphite crucible on the midmost position of the furnace bottom and compacting the furnace bottom; hierarchically adding the lining material of the furnace-body outer lining into a space between the glass fiber fabric bag and the graphite crucible, and tamping and knotting the lining material so as to obtain the furnace-body outer lining, so that the top surface of the furnace-body outer lining is lower than the top surface of the graphite crucible and the top surface of the induction coil; adhering a fire door to the top surface of the graphite crucible through the fire-door lute, filling the fire-door lute between the fire door and the glass fiber fabric bag, and carrying out tamping and flattened-brushing on the fire-door lute so as to obtain a fire-door outer lining; carrying out sintering on the outer lining by using an oven, so that silica has crystal transformation; and after the whole furnace is hardened, stopping heating so as to complete the furnace building. The method disclosed by the invention has the characteristics of high strength, good furnace-body combined performances and long service life.

The invention relates to a lost foam casting die and method for a braking disc and belongs to the technical field of lost foam casting and aims to solve the technical problem of short service life. According to the lost foam casting die and method for the braking disc, lost foam casting is adopted, the hardness of a friction surface of the braking disc is uniform and the service life is long. According to the technical scheme, the lost foam casting die comprises an upper die, a lower die and a semi-circular casting lost foam pattern, wherein cavities are formed in inner surfaces of the upper die and the lower die, a casting cavity is formed between the upper die and the lower die after the upper die and the lower die are buckled, the semi-circular casting lost foam pattern is arranged in the casting cavity, multiple movable blocks are arranged in the semi-circular casting lost foam pattern, and sprue gates are formed in tops of the upper die and the lower die. The lost foam casting die and method for the braking disc are widely used for casting of the braking disc.

The invention discloses an aluminum alloy strip for a battery shell and a manufacturing method of the aluminum alloy strip. The aluminum alloy strip comprises the following components in percentage byweight: 0.55%-0.75% of Fe, 0.20%-0.40% of Si, 0.08%-0.10% of Cu, 0.95%-1.15% of Mn, 0.015%-0.020% of delta Ti and the balance of Al. Delta Ti is the content difference value of Ti in a launder and astanding furnace. The manufacturing method comprises the steps of smelting and refining; continuous casting and rolling; double-stage desolventizing annealing; and cold rolling. The alloy cooling solidification speed in the continuous casting and rolling process is effectively reduced, the solid solution amount of Mn in the alloy is reduced, segregation and unbalanced crystalline structures are eliminated, fine grain structures are formed in the alloy, and the distribution uniformity of alloy elements is improved; and the tensile strength of a finished product of the prepared aluminum alloy strip ranges from 140 MPa to 165 MPa, the yield strength is larger than or equal to 130 MPa, the ductility is larger than or equal to 8%, and the mechanical property is excellent.

The invention belongs to the field of machinery machining and manufacturing, and particularly relates to a machining device which is used for improving the surface quality and inner quality of a hole of a product. The device for machining the hole comprises a hydraulic system, a control system and a machining system. The machining system comprises a steel ball which is matched with the bore diameter of a workpiece. The hydraulic system machines the hole on the workpiece by extruding the steel ball. The device for machining the hole is mainly characterized in that the hole on the workpiece is machined by extruding the certain-size steel ball. A traditional boring mode is changed, a certain extruding allowance is reserved before extruding, an end-product hole is machined by the fact that the certain-size steel ball is extruded, the end product pass rate of the hole is improved, the quality and the roughness requirements of the hole are improved, the organizing density of the interior of the hole is strengthened, pulling-out force (pulling-out face used for matching of a shaft and a hole) requirements of a product hole is greatly increased, and production efficiency is improved.

The invention discloses a high-entropy alloy component and a manufacturing method thereof, and relates to the technical field of high-entropy alloys. The problem of composition segregation of the high-entropy alloys is avoided. The manufacturing method of the high-entropy alloy component comprises the steps that a substrate is provided; metal powder is laid on the substrate, wherein the metal powder comprises Al, Co, Cr, Fe and Ni with the atomic ratio being a: b: c: d: e, a is larger than 0 and smaller than or equal to 1.2, and each of b, c, d and e is equal to 1; and the metal powder is subjected to melting forming treatment through a selective laser melting process, and the high-entropy alloy component is obtained. The high-entropy alloy component and the manufacturing method thereof are used for manufacturing the high-entropy alloy component.

The invention provides a manufacturing method of a rotary type compressor crankshaft blank and belongs to the technical field of liquid variable capacity machinery, aiming at solving the problem thatan existing crankshaft blank is easy to bend and deform in a cold heading molding process. The manufacturing method of the rotary type compressor crankshaft blank is carried out according to the following steps: first step, selecting materials and blanking; selecting a round steel rod with the diameter which is greater than that of a long shaft part and smaller than that of an eccentric crankshaftpart; second step, coldly extruding and molding the long shaft part, wherein a transition part is provided with the long shaft part and a cylindrical part connected with one end of the long shaft part; and third step, coldly extruding and molding the eccentric crankshaft part and a short shaft part, and applying axial pressure to the transition part to enable the cylindrical part in the transition part to be deformed, fully fill an eccentric crankshaft molding cavity and enable residual materials to flow into a short shaft molding cavity. In a production process of the rotary type compressorcrankshaft blank, the eccentric crankshaft part and the short shaft part are nearly subjected to an axial bearing force in a molding process, so that the rotary type compressor crankshaft blank is noteasy to bend and deform.

The invention discloses an automobile air-conditioning compressor swash plate. The automobile air-conditioning compressor swash plate is prepared from the following component aluminum alloys in percentage by weight: 10%-12% of silicon, 3%-4% of copper, 0.2%-0.3% of magnesium, 0.6%-1.2% of nickel, 0-0.2% of manganese, 0.2%-0.4% of molybdenum, 0-0.4% of iron, 0-0.1% of zinc, 0.2%-0.6% of chromium, 0-0.2% of titanium, 0.1%-0.2% of carbon, 0.2%-0.4% of rhenium, and the balance of aluminum. A production method of the automobile air-conditioning compressor swash plate comprises the steps that step one, preheating is carried out; step two, gold melting is carried out; step three, deterioration is carried out; step four, heat treatment is carried out; step five, rough machining is carried out; step six, cryogenic nitrogen treatment is carried out; and step seven, finish machining is carried out. According to the Automobile air-conditioning compressor swash plate and the production method thereof, the tissue density of products can be enhanced, the abrasive resistance and strength of the products are improved, transformation of the products is avoided, internal stress of the products is eliminated, the life is prolonged, and the actual use requirement is met.

The invention discloses a preparation process of a volute spiral spring and relates to the technical field of spring preparation. The preparation process includes the following steps: S1: a spring rawmaterial is prepared; S2: hole punching treatment is performed on the raw material, and a hole punched material is obtained; S3: forming treatment is performed on the hole punched material, and a formed material is obtained; S4: winding treatment is performed on a special mandrel for the formed material, and a coil spring intermediate material is obtained; S5: normalizing, quenching and temperingtreatment is sequentially performed on the coil spring intermediate material, and a semi-finished coil spring is obtained; S6: reaming and shot blasting aftertreatment is performed on the semi-finished coil spring, and an aftertreatment semi-finished product is obtained; and S7: size inspection is performed on the aftertreatment semi-finished product, surface treatment is performed after qualifying, and finally the finished volute spiral spring is obtained. The preparation method has the advantages of improving the finished product quality of the volute spiral spring.

The invention discloses a cold precision forging forming technology for an inner spline lock with an inverted cone. According to the body of the technology, precision forging forming of an end face ratchet and an inner spline is synchronously finished through a cold blocking forming procedure. The technology specifically comprises the following procedures of material preparing, ring rolling blankmanufacturing, annealing treatment, surface treatment, blank turning, phosphating, cold precision forging and finish machining. Few procedures are adopted, the work efficiency is high, and most importantly, machining of the end face ratchet and the inner spline is synchronously finished through one-time cold blocking forming work. Due to the fact that the position degrees of the ratchet and the inner spline in a lock ring are achieved through a die, precision is guaranteed, and consistency is good. In addition, the rolling and cold precision forging forming technology is adopted, on one hand,the original metal flow line is kept in the forming process, and on the other hand, the tissue density of the raw material is greatly improved; and accordingly, the abrasion resistance and strength ofproducts can be better improved, and the manufactured lock ring completely meets the requirement for automobile matching

The invention provides a comprehensive utilization method of powder by-products generated in the spray forming process. The method comprises the steps that powder by-products are pressed, formed and sintered directly; the powder by-products mainly from extra powder generated in the spray forming green part preparation process, and are named as powder by-products in order to differ from a spray forming green part; according to the pressing forming, a hydraulic single column press or a four-column hydraulic press is adopted for loading the powder by-products into a steel mold to be formed, and agreen body is prepared; according to sintering, a vacuum hot pressing furnace is adopted for performing sintering densification, an alloy is prepared, and therefore the powder by-products are comprehensively utilized. According to the comprehensive utilization method of powder by-products generated in the spray forming process, the preparation technological process is short, the cost is low, operation is easy, convenient and flexible, the prepared materials have the structure and performance advantages of being fine in grain, uniform in structure, free of segregation and high in strength. Themethod can effectively achieve comprehensive utilization of powder by-products, the material utilization rate is increased, and the certain economic benefits are obtained.

The invention relates to a vesuvianite roast sausage. The vesuvianite roast sausage is prepared from the following components in parts by weight: 545 parts of lean meat, 253 parts of fat, 8.6 parts of edible salt, 46 parts of white granulated sugar, 6.5 parts of monosidum glutamate, 2.5 parts of phosphate, 1 part of compound essence material, 0.5 part of five spice powder, 0.26 part of star aniseed powder, 0.46 part of white pepper powder, 0.31 part of liquorice root powder, 0.25 part of cinnamon powder, 0.62 part of sodium erythorbate, 0.013 part of sodium nitrite, 0.014 part of monascus color, 10 parts of potato flour, 5 parts of protein isolate, 1.7 parts of garlic powder, and 1.1 parts of bitter gourd flower. The vesuvianite roast sausage has the advantages that the bitter gourd powder has the effects of clearing heat and detoxifying, beautifying and tenderizing skin, decreasing blood glucose, nourishing blood and liver and the like, and the garlic has certain spicy taste and can cover the bitter flavor of bitter gourd, so that the influence to original mouth feel of the roast sausage is avoided, and the vesuvianite roast sausage is well received by consumers.