16results about How to "Avoid brittleness" patented technology

The application provides a high-thermal-conductivity diamond / copper composite material and an SPS sintering process thereof, raw material pretreatment: selecting three kinds of monocrystalline diamond particles with different particle sizes, mixing the titanium-plated diamond obtained after vacuum titanium plating treatment; solid dry powder mixing: uniformly mixing a solid additive and graphene modified copper powder to prepare a copper-based composite dry powder; nitrogen intermittent airflow suspension dispersion: adding the titanium-plated diamond into a sealed covering tank to make the titanium-plated diamond suspended and dispersed in the sealed covering tank; atomization covering makes the copper-based composite dry powder uniformly covered on the surface of the titanium-plated diamond to obtain composite particles; vacuum low-temperature degreasing to obtain the composite particles after degreasing, and SPS sintering demolding to obtain the high-thermal-conductivity diamond / copper composite material. The coating is uniform and dense, has no exposure and no agglomeration, and significantly reduces porosity and interface thermal resistance; the proportioning is accurate, the degreasing is thorough, and there is no residue; the generation of brittle phases is inhibited, and the interface combination is excellent; the thermal conductivity is stable and greater than 700 W / (m*K), and the density is greater than or equal to 99%.

The present application relates to the technical field of high polymer composite material, and especially to a co-extrusion fabric, a preparation method and application thereof, and is especially suitable for the field of steel-plastic composite floor which is strict in size stability and mechanical property requirement, such as building decoration, industrial floor, outdoor paving, etc., the co-extrusion fabric comprises the following raw material components in parts by weight: polyethylene: 40-70 parts; elastomer: 20-50 parts; compatibilizer: 3-10 parts; inorganic mineral: 5-10 parts; antioxidant: 0.1-1 part; lubricant: 0.5-1 part; a low-shrinkage, anti-warping polyethylene composite zinc-aluminum-magnesium alloy steel-plastic floor co-extrusion fabric is provided, by optimizing the raw material ratio, selecting special compatibilizer and inorganic mineral filler, the efficient compatibility of polyethylene, elastomer and inorganic filler is realized, the polyethylene crystalline morphology is controlled, the material shrinkage is greatly reduced, the hidden danger of warping deformation is eliminated, and the mechanical strength, toughness and weather resistance of the material are improved.

This invention relates to an integrated clean packaging machine for scallion processing, comprising a frame, a directional sorting mechanism, a flexible transfer mechanism, a waterless clean treatment module, a compact bundling and weighing module, and a controller. The directional sorting mechanism uses a crank-rocker to drive a wedge-shaped pusher plate in conjunction with a flexible brush, achieving orderly output of individual scallions. The flexible transfer mechanism utilizes a multi-degree-of-freedom robotic arm combined with a photosensitive device to grasp and transfer scallions. The waterless clean treatment module uses a spring-driven adaptive friction sliding cover reciprocating motion to remove dead skin and dirt from the scallion surface through radial friction. The compact bundling and weighing module integrates automatic film feeding, circumferential bundling, electrothermal film cutting, and automatic weighing functions. This invention solves the problems of easy jamming during scallion processing, reliance on manual single-scallion feeding, easy spoilage due to water washing, and poor brush cleaning effect in existing technologies, achieving efficient, non-destructive, and low-energy fully automated clean processing of scallions.

The utility model discloses a deburring device for plastic meal box processing, including conveyer belt, the outside of conveyer belt is sequentially provided with refrigeration mechanism and shot blasting mechanism, the refrigeration bin is fixed in the conveyer belt outer frame, and the liquid nitrogen tank is located the refrigeration bin rear and is connected to the refrigeration bin inside through the conveying pipeline, and the electric control valve is installed on the conveying pipeline, and the inner wall fixed cooling box of refrigeration bin is equipped with the screen plate in the lower end of cooling box, the shot blasting bin is fixed in the conveyer belt outer frame of refrigeration bin right side, and the drive motor is installed on the upper end of shot blasting bin and is connected centrifugal fan, and the deburring device for plastic meal box processing is additionally provided with refrigeration mechanism and shot blasting mechanism, and the precision temperature control and energy consumption optimization of low temperature embrittlement are realized to the collaborative cooling design of refrigeration mechanism through metal cooling box and screen plate, and the high coverage impact of spiral conveying structure and pneumatic shot blasting structure ensures burr removal efficiency and pellet circulation economy, and the both cooperation significantly improves the yield rate and production efficiency of plastic meal box deburring process.

A kind of low vacuum laser welding method for GH4169 high-temperature alloy and SS304 stainless steel, the present application belongs to laser welding technical field.The present application solves the problem that the existing welding method cannot realize the low-cost and high-quality connection of medium thickness and above GH4169 alloy and SS304 stainless steel.One, welding assembly;Two, low vacuum laser welding;Three, heat treatment.The present application is used for the low vacuum laser welding of GH4169 high-temperature alloy and SS304 stainless steel.

The utility model relates to the technical field of anti-falling devices, and discloses a double-end stable type suspension type iron tower anti-falling device which comprises a shell, a steel wire rope and a top pad, a multi-buffering mechanism is arranged at the bottom of the outer wall of the top pad, a wear-resistant mechanism is arranged on the inner wall of the shell, a tooth-shaped mechanism is arranged on the outer wall of the steel wire rope, and the tooth-shaped mechanism is arranged on the outer wall of the steel wire rope. A retarding mechanism is arranged at the bottom of the outer wall of the steel wire rope, a reinforcing mechanism is arranged in the shell, the retarding mechanism comprises a push column, the top of the outer wall of the push column is fixedly connected to the bottom of the outer wall of a top pad, and a piston is fixedly connected to the bottom of the outer wall of the push column. According to the device, the shell serves as an external structure, supports internal assemblies, bears falling impact and transmits braking force, the three-stage buffering mechanism achieves buffering through a push column driving piston, a sliding groove and a sliding block matched with a telescopic rod, the reinforcing mechanism controls a ratchet wheel to rotate through a main shaft, stability is enhanced through a ratchet wheel cover, falling impact energy is dispersed, and human body safety is guaranteed.

The present application relates to a kind of mechanical bucket tooth steel and preparation method, mechanical bucket tooth, end product, it relates to mechanical bucket tooth steel technical field, including by mass percentage C 0.3-0.35%, Si 1-1.2%, Mn 1-1.3%, P≤0.02%, S≤0.015%, Cr 1.1-1.3%, Ti 0.06-0.1%, Mo 0.15-0.2%, Al 0.015-0.03%, the balance is Fe and unavoidable impurities;The hardness difference absolute value of surface hardness and core hardness in the mechanical bucket tooth steel ≤6HB.The mechanical bucket tooth steel provided by the present application, through the optimization design of steel component, especially control Si, Cr, Ti, Mo and Al content, utilize the cooperation effect of each element to optimize the hardness distribution of steel, so that the core hardness and surface hardness of steel product difference reduce, to improve the processing effect of steel product.

This invention discloses a dry heat treatment method for tomato seeds to enhance seed vigor and extend storage life, relating to the field of tomato seed storage technology. The method includes: selecting mature, plump, and undamaged commercial tomato seeds with consistent maturity and maintaining appropriate moisture content; placing the pre-treated seeds in a single layer on a tray and placing it in a dry heat treatment device, performing dry heat treatment sequentially according to a preset program; comparing the germination indicators of dry heat-treated and untreated seeds to determine the effect of the dry heat treatment; and sealing and storing tomato seeds with qualified germination rates. This invention, through precisely controlled stepwise heating and high-temperature constant-temperature sterilization, effectively activates the seed's internal repair enzyme system while inhibiting metabolic processes that lead to seed deterioration, avoiding physical or physiological damage to the seeds caused by high-temperature treatment, and effectively preventing seed coat cracking, radicle burn, or excessive dehydration.

The invention relates to the technical field of steam condenser descaling, and particularly discloses a dynamic anti-scaling aluminum-based efficient steam condenser which comprises a base, a shell is arranged on the base, a top cover is arranged on the shell, a condensation assembly is arranged in the shell, and a descaling assembly and an anti-scratching assembly are arranged on the outer side of the condensation assembly. According to the dynamic anti-scaling type aluminum-based efficient steam condenser, a fixing plate and a scraper are continuously pushed to be tightly attached to the outer wall of a heat exchange pipe through the elastic force of a spring in a descaling assembly, hydraulic oil in an oil storage barrel generates damping force in the reciprocating motion of a first piston, the springback speed of the spring is effectively reduced, and shaking or impact of the scraper is avoided; in addition, a magnet on the scraper is matched with a magnetic attraction base on the fixing plate, and the magnet and the magnetic attraction base are connected in a reinforced mode through a bolt, so that the scraper can be rapidly disassembled and replaced after being abraded, and the convenience of descaling maintenance is improved.

The utility model relates to the technical field of batteries, and discloses an explosion-proof valve of a battery and the battery, the explosion-proof valve comprises a main body, the main body is provided with a first surface and a second surface, the main body is recessed from the first surface to the second surface to form a nick, the nick comprises a first section and a second section which are connected along the thickness direction, and the first section and the second section are arranged in a direction perpendicular to the thickness direction; the width of the second segment does not exceed the width of the first segment, the width change rate of the first segment is i, the width change rate of the second segment is j, and i is smaller than j. Compared with the first subsection, the second subsection has smaller width and larger width change rate, so that when the nicks are punched on the main body, the material of the main body can move towards the two sides of the width direction, the probability that the material moves along the thickness direction is reduced, the accumulation of the material at the residual thickness part of the nicks is reduced, and the production efficiency is improved. The excessive brittleness of the residual thick part of the nick is avoided, so that the abnormal opening of the explosion-proof valve can be avoided, and the stable pressure relief effect of the explosion-proof valve is ensured.

The utility model provides a grease-proof corrugated board suitable for cold-chain logistics, which sequentially comprises a grease-proof coating, a low-temperature-resistant PLA (polylactic acid) lamination layer, a wavy buffer layer, a rebound filling layer, a degradable PE (polyethylene) preservative film layer, an oil-resistant coating, a honeycomb board layer, an oleophobic activated carbon non-woven fabric layer and a high-density corrugated paper inner layer from outside to inside, and the rebound filling layer is correspondingly arranged in a corrugated gap of the wavy buffer layer in a filling manner. High low temperature resistance and grease permeation resistance are realized.

The invention discloses a preparation method of a TiZrNbCr medium-entropy alloy with high-temperature strength and toughness, and relates to the technical field of medium-entropy alloys, the chemical formula of the medium-entropy alloy is recorded as (TiZrNb) xCry, x and y are the molar percentage of TiZrNb and Cr, x is larger than or equal to 95 and smaller than or equal to 99, and y is larger than or equal to 1 and smaller than or equal to 5. An alloy cast ingot, namely a TiZrNbCr medium-entropy alloy ingot, is obtained; secondly, the alloy ingot is subjected to wire cut electrical discharge machining to obtain a square alloy sheet; thirdly, the square alloy sheet is put into a rolling mill to be rolled, the TiZrNbCr medium-entropy alloy with high-temperature strength and toughness is obtained, a proper amount of Cr element is added into the TiZrNb alloy, solid solution strengthening is enhanced, and the strength of the alloy under the high-temperature condition is effectively improved; the structural stability is enhanced, and the alloy keeps good toughness at high temperature.

This utility model discloses a multi-layer composite plastic-free waterproof packaging paperboard, comprising, from the outside to the inside, a waterproof functional layer, a first fiber substrate layer, a moisture regulating layer, a second fiber substrate layer, and a support and cushioning layer, stacked sequentially. A micron-level interlocking structure is formed at the interface between the first fiber substrate layer and the waterproof functional layer. The waterproof functional layer is composed of a plastic-free fiber layer impregnated or coated with a bio-based hydrophobic agent. The moisture regulating layer is a loose cellulose fiber web loaded with highly absorbent resin particles. The support and cushioning layer is a recycled pulp molding layer with a honeycomb or corrugated three-dimensional structure. The plastic-free composite process strengthens the interlayer bond through the interweaving of plant protein glue and hot-pressed fibers. The overall structure has high strength, strong waterproof capability, and is environmentally friendly, effectively solving the pollution problems caused by traditional plastic film packaging.

The invention discloses a preparation method of scratch-resistant leather, and belongs to the technical field of leather functionalization treatment. The method comprises the following four core steps: preparing a double-dynamic covalent bond self-repairing polyurethane emulsion, constructing a bionic layered anti-crack reinforced phase, forming a flexible self-repairing composite coating, and preparing a gradient modulus surface hardening layer. And the multi-mechanism synergistic composite coating with dynamic covalent network self-repairing, lamellar bionic structure crack resistance, low-friction synergistic scratch resistance and surface gradient hardening scratch resistance is constructed on the surface of the leather. The scratch-resistant leather solves the problems that the hardness and flexibility of traditional scratch-resistant leather are contradictory, scratches cannot be repaired, durability is insufficient and the like, the scratch resistance and long-term use stability of the leather are remarkably improved while the flexible hand feeling of the leather is kept, and the scratch-resistant leather is suitable for the field of high-durability leather products.

The invention discloses a high-toughness PA composite material and a preparation method thereof, and relates to the technical field of PA composite materials. The invention discloses a high-toughness PA composite material. The composite material is prepared from the following raw materials in parts by weight: 60 to 70 parts of polycaprolactam resin, 8 to 12 parts of maleic anhydride grafted polyolefin elastomer, 5 to 8 parts of modified nano calcium carbonate, 10 to 15 parts of modified glass fiber, 0.2 to 0.4 part of antioxidant 1098, 0.1 to 0.3 part of antioxidant 168, 0.3 to 0.5 part of zinc stearate, 3 to 5 parts of ethylene-vinyl acetate copolymer, 1 to 2 parts of organic montmorillonite and 0.5 to 1 part of titanate coupling agent NDZ-101. 0.8 to 1.2 parts of a caprolactam chain extender, and 0.1 to 0.2 part of dibenzylidene sorbitol. According to the high-toughness PA composite material, the polycaprolactam resin is used as a basis, and the modified nano calcium carbonate and the modified glass fiber are matched to enhance toughness and strength, so that the product is high in toughness and good in practicability.

The invention discloses a large-span portal steel frame structure hoisting process, and relates to the technical field of steel structure engineering. The technology comprises the six core steps of steel member deepening design, hoisting equipment model selection, steel column hoisting, steel beam hoisting, installation in-place fixing and steel structure overall connection, specifically, during steel member deepening, the steel column is produced in two sections and spliced on site, and after the steel beam is produced in multiple sections, the steel beam is divided into two sections along a ridge; a 50t STC500E5 automobile crane is selected as a main crane, and a 25t QY25 automobile crane is selected as an auxiliary crane; the steel column is lifted by double cranes, and the steel beam is lifted by 50t single machine and two points; a steel wire rope with the diameter phi being 12 mm and a triangular plate with the thickness being 25 mm are adopted for temporary fixing, and the working environment According to the process, the problems of deformation and anti-corrosion cracking of components of conventional hoisting are solved, the safety and efficiency of hoisting of the large-span and ultrahigh steel structure are improved, and the construction quality is guaranteed.