20results about How to "Guaranteed hardness" patented technology

This invention discloses a method for preparing a large round billet for continuous casting of forged cold-rolled roll sleeves, comprising: controlling the composition system, wherein the chemical composition of the raw material steel is: C: 0.65-0.75%, Si: 0.25-0.40%, Mn: 0.35-0.50%, P≤0.020%, S≤0.020%, Cr: 1.90-2.10%, Ni: 0.30-0.45%, Mo: 0.20-0.40%, V: 0.05-0.10%; and controlling the continuous casting process parameters, wherein the superheat is controlled within a certain range. The casting temperature is maintained between 15 and 35°C, the casting speed is kept stable at 0.24 ± 0.01 m / min, the crystallizer water flow is controlled at 3700 L / min, and the secondary cooling water flow in the crystallizer is controlled at 0.12 L / Kg. During continuous casting, a 200 A / 2.5 HZ electromagnetic stirring of the casting flow and a 500 A / 1.2 HZ strong end electromagnetic stirring are used. The heat treatment process parameters for the continuously cast round billets are controlled as follows: red-charging annealing of the continuously cast round billets, furnace charging temperature ≥ 400°C, heating rate ≤ 100°C / h, holding at 730°C for ≥ 15 h, furnace cooling to 400°C, and air cooling upon exiting the furnace. This invention ensures the hardness and wear resistance of the cold-rolled roll sleeves while improving toughness and machinability, avoiding surface cracking and internal cracking of the roll sleeves during the casting and forging processes, ultimately achieving high-efficiency production and long service life of the roll sleeves.

The utility model discloses a kind of automobile A column reinforcing member based on lightweight design, it is related to the technical field of automobile parts, including external steel body, the inside of external steel body is equipped with main body reinforcing component, the inside of main body reinforcing component is equipped with energy-absorbing member, the side of external steel body away from the surface of main body reinforcing component is equipped with sound insulation cotton.The utility model can make the internal structure of automobile A column more stable by main body reinforcing component, reduce the deformation due to collision, protect front compartment safety, by energy-absorbing member, local shock wave can be offset, ensure that front compartment living space is not deformed, while the material density of energy-absorbing member is smaller, the overall weight of A column can be reduced, so as to reduce the weight of entire vehicle body, reach the effect of reducing fuel consumption, while external steel body is fixed together by hinge hole bolt and angle steel bolt, compared with general welding mode, when maintaining, avoid cutting A column, cause stress concentration of A column, affect the safety of overall A column structure.

The utility model provides an aluminum alloy part oxidation device, belongs to the technical field of material surface treatment, and aims to solve the problem that the oxidation effect of an aluminum alloy part is influenced by non-uniform electrolyte caused by effective component sedimentation due to long-time standing of the electrolyte of the conventional aluminum alloy part oxidation device in the anodic oxidation process. The electrolyte box is of a rectangular box-shaped structure; the gear set shell is fixedly arranged at the upper end of the front end surface of the electrolyte box; the reciprocating driving motor is fixedly arranged on the left end face of the gear set shell; the spring limiting blocks are arranged on the upper end surfaces of the two cross beams of the pendant bracket; the reciprocating rotating assembly is arranged in the gear set shell; and the hanging frame fixing assembly is arranged at the position of the hanging piece support. The device has the comprehensive advantages that the electrolyte components are kept stable and uniform, and the oxidation process is faster and more efficient.

This utility model relates to a tissue separation device for spermatic vein ligation surgery, belonging to the field of male infertility surgery and medical devices. The separation device includes an intermediate pad with a central groove for accommodating a movable soft coil; hooks are provided on the opposite end face of the intermediate pad opposite the groove. The hooks bend downwards on both sides, effectively fixing the external spermatic fascia and cremaster muscle, fully exposing the surgical area. The silicone soft coil can be inserted between the blood vessels (testicular artery, pampiniform plexus) and the cremaster muscle, fully exposing the vessels to be ligated. The tissue separation device for spermatic vein ligation surgery provided by this utility model uses a medical-grade silicone soft coil, which has good biocompatibility, allows for flexible intraoperative operation, and its softness avoids damage to blood vessels.

This invention relates to a method for improving the bowl-shaped end face of drill collar steel after straightening, belonging to the technical field of drill collar steel production processes in the metallurgical industry. The technical solution is as follows: a seven-roll straightening method is used, with the reduction of the No. 1 and No. 3 upper and lower rolls being 4-5 mm, and the reduction of the No. 2 upper and lower rolls being 1-2 mm; the reverse bending amount is 15-16 mm; the straightening roll angles are: No. 1 upper and lower roll angle 29.5-30°, No. 2 upper roll angle 30-31°, No. 3 upper roll angle 29.5-30°, and lower roll angle 32-32.5°; the end of the straightened round steel is chamfered, with a chamfer angle of 30-45° and a chamfer length of 1-2 mm. The beneficial effects of this invention are: it can reduce the internal structural stress of the drill collar steel, ensure the hardness of the drill collar, and ensure that the bowl-shaped end face depth of the straightened drill collar steel is within 2 mm, avoiding cracking at the end face face during processing.

The utility model discloses a vacuum oil quenching furnace with stirring function belongs to vacuum oil quenching furnace technical field. Including the furnace body and the furnace cover, the furnace cover is hinged with the furnace body through the hinge, and the furnace cover is locked and fixed with the furnace body, and the inside of furnace body is equipped with the gas outlet, and the gas outlet is connected with the gas outlet pipe, and the inside of furnace body is slid with the connecting frame, and the connecting frame is suspended in the inside of furnace body, and the inside of connecting frame is rotatably connected with the shaft, and the outside of shaft is distributed with four sets of fixed frame, and the inside of fixed frame is all installed with three sets of clamp, and the clamp is used for clamping the plate -shaped work piece, and the outside of furnace body is installed with motor, and the motor is connected with the shaft transmission, and the top of furnace body is installed with a plurality of shower nozzles, and a plurality of shower nozzles are arranged vertically, and a plurality of shower nozzles are connected with the oil injection pipe, and the inside of fixed frame is suspended with the plate -shaped work piece through the clamp, and is suspended and fixed, and rotates through the motor drive shaft, and makes every work piece all can be close to the shower nozzle, thereby realizes the consistency to the work piece quenching.

The utility model discloses a wire drawing device capable of cooling, which comprises a thick wire unreeling device, a wire drawing processor, a metal wire cooling assembly and a thin wire reeling device which are fixedly arranged at the top end of a bearing base in sequence, and the metal wire cooling assembly comprises a water circulation base and a metal wire cooling box for bearing cooling oil. The multiple metal wire cooling boxes are sequentially connected and fixedly installed at the top end of the water circulation base, and a second guide connecting shaft is rotationally installed on the lower portion of an inner cavity of the bearing outer box. A main body of the metal wire cooling box is arranged to be a bearing outer box, a heat preservation inner cushion layer is fixedly connected to the inner wall of the bearing outer box, and a second metal wire guide roller is rotationally installed in the middle of the outer wall of a second guide connecting shaft. The metal filaments are cooled through the three metal wire cooling boxes, the metal filaments are cooled in a stepped mode through air and cooling oil at different temperatures, and the toughness of the metal filaments is improved on the basis that the cooling speed, hardness and abrasion resistance of the metal filaments are guaranteed.

The utility model discloses a high-speed grinding wheel for glass processing, and relates to the technical field of glass processing. Comprising a grinding wheel seat and a grinding wheel mounted at the top end of the grinding wheel seat and used for grinding. The outer cambered surface of the grinding wheel seat penetrates through the inner cavity of the grinding wheel and is provided with a plurality of groups of dewatering ports at equal radian, and the inner wall of the positioning bottom plate is provided with a plurality of groups of water distributing grooves corresponding to the dewatering ports. According to the high-speed grinding wheel for glass processing, through collaborative optimization of materials, structures and functions, the glass processing efficiency and quality are remarkably improved. By adopting the design of the high-strength diamond material, the silicon carbide and the ceramic abrasive, the cutting hardness and the thermal conductivity are guaranteed during high-speed operation, the stress concentration problem is relieved, and the overall service life of the grinding wheel is prolonged. Rapid circulation and throwing-out of the cutting fluid are achieved, the grinding temperature is effectively reduced, glass edge breakage or burning is avoided, and the surface smoothness under 12 m / min high-speed machining is ensured.

The present application relates to a kind of crusher super wear-resistant cone lining plate steel and its preparation method, contains the following components by mass percentage: C:1.30-1.50%, Mn:22-25%, Si:0.35-0.80%, Cr:2.0-2.5%, V:0.1-0.15%, Ti:0.06-0.12%, N:0.05-0.08%, Mo:0.3-0.6%, P≤0.035%, S≤0.015%, the balance is Fe and inevitable impurities.Mass ratio of Mn / C is 16-18, mass ratio of Cr / V is 16-20, and total mass ratio of Cr+Mo≤2.8%.The hardness of steel can reach 289HB, impact toughness can reach 203J / cm 2 , tensile strength can reach 849MPa, reduce the mass addition of Ni, Mo and other elements, greatly reduce cost.

The invention discloses self-fluxing Fe-based alloy powder, a high-temperature oxidation resistant TiC / Fe cladding layer and a preparation method of the high-temperature oxidation resistant TiC / Fe cladding layer. The self-fluxing Fe-based alloy powder comprises 2-3 wt% of Ti powder, 4.0-5.5 wt% of Cr3C2 powder and the balance Fe-based matrix powder, and the Fe-based matrix powder comprises the following chemical components: 13-18 wt% of Cr, 1.5-2.7 wt% of Ni, 1.0-1.5 wt% of B, 1.0-2.0 wt% of Si, 1.0-2.2 wt% of C, 0.8-1.6 wt% of Mo, 0.5-1.2 wt% of Co and the balance Fe and inevitable impurities. The self-fluxing Fe-based alloy powder comprises Ti powder, Cr3C2 powder and the balance Fe-based matrix powder, the Fe-based matrix powder comprises Mo and Co which can form a compact structure for inhibiting oxygen diffusion, and a TiC / Fe cladding layer formed by the self-fluxing Fe-based alloy powder can have good hardness, high-temperature oxidation resistance and corrosion resistance at the same time.

The invention discloses an ultra-thick high-temperature-resistant and wear-resistant cladding layer on the surface of a hot mold and a preparation method and application thereof.The preparation method of the ultra-thick high-temperature-resistant and wear-resistant cladding layer on the surface of the hot mold comprises the following steps that S1, cladding layer mixed powder is prepared, and cobalt-based alloy powder comprises, by mass, 50%-60% of Co, 30%-35% of Cr, 1%-3% of Fe, 1%-2% of Si, 1%-3% of Ni, 0.2% of Mn, 0.2% of Mo and the balance Fe; and the cobalt-based alloy powder is mixed with tungsten carbide powder, and transition layer powder and wear layer powder are obtained. According to the prepared super-thick high-temperature-resistant and wear-resistant cladding layer on the surface of the hot mold, the cobalt-based alloy is creatively adopted as a high-temperature adhesive and matched with large-particle broken tungsten carbide to serve as a hard phase, and precise matching of the performance of the cladding layer is achieved by differentially regulating and controlling the content of tungsten carbide in the transition layer and the wear layer. The overall thickness of the coating is far larger than that of a traditional PVD titanium nitride coating, long-acting protection can be provided for the hot mold, and the service life of the hot mold under the high-temperature and high-abrasion working condition is greatly prolonged.

The utility model relates to the technical field of transfer material boats, and discloses a transfer material boat suitable for a high temperature furnace, which comprises a bottom plate, the upper surface of the bottom plate is fixedly connected with a U-shaped plate, and the lower surface of the bottom plate is fixedly connected with a sliding block matched with a sliding rail in the high temperature furnace. The left side and the right side of the upper surface of the U-shaped plate are each provided with two grooves with the same size, a threaded hole is formed between the two grooves, the two grooves are detachably connected with fixing bases, and the two fixing bases are fixedly connected with a storage mechanism. A plurality of transfer material boats are combined into a whole through detachable connecting structures, the overall length is flexibly expanded, and therefore the storage requirements of workpieces of different sizes are met, it can be guaranteed that the workpieces of the same batch are completely borne in the material boat combination, the workpieces are fully supported in the whole process, a workpiece suspension area is eliminated, and the workpieces are prevented from toppling or sliding off; and the condition of non-uniform quenching is also avoided.

This application provides a method for enriching lithium from low-grade lithium clay ore. The method includes the following steps: obtaining low-grade lithium clay ore; crushing and roasting the low-grade lithium clay ore to obtain sinter; scrubbing the sinter to cause it to rub against itself; performing secondary screening on the scrubbed sinter to obtain a primary screening material with a particle size less than or equal to 0.83 mm and a secondary screening material with a particle size less than or equal to 0.015 mm; and performing flotation on the primary screening material to obtain flotated material, wherein the flotated material is combined with the secondary screening material to form lithium concentrate. This method for enriching lithium from low-grade lithium clay ore can efficiently develop and utilize lithium resources in low-grade lithium clay ore.

The application provides a coating slurry, a preparation method and application thereof, and belongs to the technical field of lithium ion batteries.The preparation method is as follows: dispersing agent, ceramic particle modifier and nano inorganic ceramic particles are dissolved in deionized water, stirring and dispersing until uniform, and then grinding and secondary dispersing; subsequently, water-soluble acrylate-based polymer solution and polyurethane-based polymer emulsion are added, stirring and dispersing until uniform, and then adding a textural structure forming aid and stirring until uniform; finally, a wetting agent is added, stirring and slowly defoaming, and the coating slurry is obtained.The coating slurry provided by the application has heat shrinkage resistance of 150-200 DEG C when applied to a diaphragm, has water resistance, can be coated twice, and can be widely applied to the field of batteries.

The application discloses a multi-slot alkali metal cell chemical six-side bonding device, which is characterized in that: firstly, the device is applied to a glass bonding link after chemical soaking; secondly, six-side bonding is realized according to the structure design of the alkali metal cell; finally, three slots are designed to bear force uniformly and simultaneously bond, so that the production efficiency is improved by three times. The application considers heating expansion, designs a right-angle drainage groove, discharges the volatilized solution, and facilitates the placement and clamping of the glass sheet. The application designs a cover plate to uniformly apply bonding external force to the three cells simultaneously, and ensures the consistency of the cells. In addition to the vertical direction, the cover plate can be freely combined in the horizontal direction. A through hole is designed on the rear wall to discharge steam. In the selection of device materials, polyether ether ketone (PEEK) is used to prevent chemical reagent corrosion, and the material hardness is ensured to resist high annealing temperature. The application provides practical and effective guidance for the preparation of an alkali metal cell required by a magnetic measurement device based on the SERF effect.

The application discloses a uniform cooling equipment for wear-resistant steel rod production and a cooling method thereof, and belongs to the wear-resistant steel rod production field.The uniform cooling equipment comprises a base frame and wear-resistant steel rods, a cooling groove is bolt-connected to the top of the base frame, and support assemblies are bolt-connected to the two sides of the cooling groove; a steam self-circulation splash-proof structure is constructed by a slope flow guide frame and two end volute rings, steam generated in the cooling process is used as a splash-proof medium, an external compressed air source is not needed, after being collected and transported through a flow guide cavity, the steam is sprayed out through the volute rings to form an inwardly converging rotational flow air curtain, and non-contact splash-proof of the two ends of the cooling groove is realized; the splash-proof form does not exist friction and wear with the surface of the steel rods, the service life of the splash-proof components is long, the replacement frequency of the splash-proof components and the length of downtime maintenance can be reduced, the splashing of cooling water and the throwing of water by the self-rotation of the steel rods can be effectively blocked, the cooling water loss is reduced, the problems of water accumulation and steam diffusion in the workshop are relieved, and the working environment is improved.

The invention provides heat treatment equipment and method for steel for a high-speed train brake disc, and relates to the technical field of electric heating furnaces. The heat treatment equipment comprises a supporting seat, a heating bin is installed at the upper end of the supporting seat, an electric heating unit is arranged in the heating bin, a heating chamber is formed in the side face of the heating bin, and a bin door can block a port of the heating chamber; a placing unit is arranged in the heating chamber, a brake disc round blank steel disc to be subjected to heat treatment heating can be placed on the placing unit to be subjected to rotary heating, and a clamped and fixed brake disc steel billet is driven to rotate at a constant speed in the heating chamber through the pneumatically driven placing unit, so that the steel billet is uniformly heated at all positions in the circumferential direction and the radial direction; the defects of large local temperature difference and non-uniform metallographic structure of the brake disc steel billet in the existing fixed placement type heat treatment furnace are overcome, the consistency of key mechanical properties such as hardness, toughness, wear resistance and thermal fatigue resistance of the steel billet is ensured, and the harsh working condition requirements of heavy load and high-frequency braking of the brake disc of a high-speed train are completely met.

The utility model discloses a dual -functional electric push type mower of snow remover of replaceable blade, including host computer casing and mowing snow removal part: host computer casing has the rear wheel of setting in the both sides of host computer casing, and the both sides of host computer casing are rotationally provided with the adjusting frame, and the adjusting frame is provided with the locking structure between host computer casing, and the bottom of adjusting frame is provided with the front wheel, and the adjusting frame rotates to adjust the inclination angle of front wheel, and mowing snow removal part sets up in the inside of host computer casing, and mowing snow removal part has the working shaft of rotation setting in the inside of host computer casing, and the side of working shaft is provided with the tool rest, and the tool rest is detachably provided with the snow removal knife through the self -locking nut, and the tool rest is detachably provided with the mower through the self -locking nut.

This invention relates to a cathodic electrophoretic coating emulsion for preventing paint cracking during perforation and its preparation method, belonging to the field of electrophoretic coating technology. The preparation method includes the following steps: S1. Blocking some isocyanate groups of toluene diisocyanate, and then reacting and bonding the unblocked isocyanate groups with polyamide resin to obtain a self-crosslinking polyamide resin; S2. Amination reaction of epoxy-terminated polybutadiene rubber with a first amine compound to obtain amino-modified polybutadiene liquid rubber; S3. Ring-opening amination reaction of epoxy resin with a second amine compound to obtain amine-modified epoxy resin; S4. Grafting the self-crosslinking polyamide resin onto the amine-modified epoxy resin to obtain grafted resin; S5. Physically mixing the amino-modified polybutadiene liquid rubber and the grafted resin, neutralizing with organic acid, and dispersing with water to obtain the cathodic electrophoretic coating emulsion. This method solves the problem of edge cracking and peeling of existing electrophoretic coatings after secondary mechanical processing such as perforation.

The invention provides a carburized gear / rack surface failure online repairing method and application thereof. The carburized gear / rack surface failure online repairing method comprises the following steps that S1, surface treatment is conducted, specifically, a surface failure area is polished, and the surface is cleaned; s2, electric arc surfacing repair is conducted, specifically, surface online repair is conducted through a CMT surfacing technology; and S3, post-treatment is carried out, wherein slow cooling and shape modification are carried out after repairing. According to the online repairing method for the surface failure of the carburized gear / rack and the application of the online repairing method, the requirements for the workpiece position and the welding posture of the carburized gear / rack are low, the welding repairing efficiency is high (the amount of deposited metal in unit time is large), the online repairing method is excellent in performance in online repairing of the carburized gear / rack component with the large thickness and the long welding seam, and the comprehensive cost is lower.