143results about How to "Tough and strong" patented technology

The invention provides a method for welding Q500qE ultralow-carbon bainite steel for a bridge. The method is excellent in joint mechanical performance and high in welding efficiency and specifically includes that aiming at specific chemical components, applicable technical conditions and different plate thicknesses of the Q500qE ultralow-carbon bainite steel for the bridge, preheating temperature before welding, groove types and welding process parameters are determined; a welding joint type adopts butt joint, penetration angle joint or ship position T-shaped angle joint; a welding method adopts submerged arc welding, CO2 gas shielded semiautomatic welding or shielded metal arc welding. By the welding method, the joint type and thickness specifications of a bridge structure are comprehensively covered, the technical scheme is simple, convenient and high in adaptivity, all implementing effects meet technical requirements of standards related to building of bridge steel and the bridge structure, and the method is of great significance in promoting upgrading of the bridge steel and development of large-span steel bridge building technology. The method can be applied to building of the bridge structure, can also be applied to welding of other ultrathin-carbon bainite steel and is high in adaptivity.

The invention discloses a combined type mechanically crushing machine hammer and a manufacturing method thereof. The hammer comprises a head part (3) and a handle part (1) which are mechanically combined for forming the hammer, the head part (3) is formed by high-chromium cast iron lost foam casting, the handle part (1) is formed through high-manganese steel lost foam casting, an installing hole (5) connected with a circular disc of a crushing machine is arranged above the handle part (1), a rabbet (4) is arranged under the handle part (1), the head part (3) is provided with a mortice (8) matched with the rabbet (4) of the handle part, and the handle part (1) and the head part (3) are connected through the mutually matched rabbet (4) and the mortice (8) for forming the integral hammer. The hammer of the invention has the advantages of simple manufacture, wear resistance, good toughness, fast replacement of the head part, repeated use of the handle part, production efficiency improvement and metal material saving. The invention is particularly suitable for manufacturing reversible hammer type crushing machine hammers.

The invention provides 4Cr3MoWVNi (B3R) hot work die steel with high strength and toughness and resistance to tempering, and a preparation process thereof. Raw materials for preparing the B3R hot work die steel comprise, by weight, C 0.35 to 0.42%, Si 0.15 to 0.35%, Mn 0.3 to 0.5%, Cr 2.50 to 3.50%, Mo 1.00 to 1.50%, W 0.50 to 0.80%, V 0.50 to 0.80%, Ni 1.45 to 1.85%, S 0.003 to 0.010% and P 0.008 to 0.018%, with the balance being Fe. The preparation process comprises the following steps: smelting at intermediate frequency--remelting (refining) of electroslag-diffusion hydrogen of electroslagingots, annealing treatment of electroslag ingots--forging--annealing of forging stocks--rough machining--vacuum heat treatment, and secondary tempering so as to obtain the novel product of die steel. The hot work die steel prepared in the invention has high Rockwell hardness, excellent impact toughness and tempering (thermal fatigue) resistance, and the advantages of optimized collocation of components, pure steel quality, a uniform structure, high strength, strong toughness, good tempering resistance, etc.

The present invention is process of preparing material for track block of rotary drilling machine. The material contains C 0.28-0.34 wt%, Cr 0.6-0.8 wt%, Mn 1.0-1.2 wt%, Si 0.5-0.9 wt%, Mo 0-0.4 wt%, RE 0.03-0.05 wt% and P+S less than 0.04 wt% and is smelted in MF inducing electric furnace. The preparation process includes deoxidation with Al in the amount of 0.3-0.6 wt% of molten steel while the molten steel is heated to overheat of 1600-1620 deeg.c, tapping at 1580-1600 deg.c, casting at 1530-1560 degg.c, forming in surface dry water glass sand mold, heating to 840-860 deg.c, maintaining for 50-70 min, lowering in the furnace to 720-750 deg.c, temperature equalization for 0.5 hr, water quenching outside the furnace, tempering at 520-540 deg.c for 50-70 min. The present invention has the advantages of high toughness, low cost, simple production process and long service life.

The present invention relates to one kind of sulfonated fluorene-containing polyaryl ether (ketone) and its application in preparing proton exchanging film. The sulfonated fluorine-containing polyaryl ether (ketone) may be prepared through polymerization of 9, 9-(4, 4-dihydroxyphenyl) fluorene and chloric or fluorous arone (arene) to form polyaryl ether (ketone); and the subsequent sulfonation with chlorosulfonic acid in the controlled consumption for controlled product sulfonation degree. The sulfonated fluorine-containing polyaryl ether (ketone) may be dissolved in different polar solvents before being cast to form single-component film, or be mixed with other polymer material for preparing composite film, or be mixed with heteropoly acid and other inorganic matter for preparing hetero film; and all these kinds of film have the advantages of low cost, high stability, high water absorption, small equivalent molecular weight, etc. and are expected to find use in fuel cell.

The invention discloses an integral thermal treatment process for a roller shell of a high-pressure roller mill. The method comprises the following specific steps of: leaving allowances for the outer circle diameter, inner hole diameter and each end face of a roller shell workpiece; putting an equal-height sleeve into the roller shell, compacting between the inner hole of the roller shell and thesleeve as well as the inner hole of the sleeve with heat-preserving cotton, and arranging an upper cover plate and a lower cover plate on the upper end face and lower end face of the roller shell; putting the sleeve workpiece into a thermal treatment furnace through a hanger, and performing normalizing treatment; quenching; putting into water for cooling; charging in time after cooling, and tempering; and tempering, preserving heat, discharging, and cooling in the air. In the thermal treatment process, the process requirements of high hardness and wear resistance on the surface of the roller shell of the high-pressure roller mill as well as toughness of a core part can be met by only using the conventional thermal treatment equipment.

The invention provides a high-performance historic site repair material and a preparation method thereof. The repair material comprises the following raw materials: 191-287 parts of sticky rice pulp, 115-185 parts of lime, 0-4 parts of brown granulated sugar, 344-398 parts of fine aggregates, 204-268 parts of complex mineral admixture, 11-12 parts of reinforcing agent, and 0-19 parts of mineral pigment. The invention further provides a preparation method of the repair material. The preparation method comprises the following steps: weighing all the raw material according to weight, and forcibly stirring evenly to obtain the repair material. Amylopectin in the sticky rice pulp is a highly branched macromolecule, the setting and hardening processes of the lime and the pozzolanic reaction of the complex mineral admixture are influenced, the strength development of the material is similar to biomineralization process, and a microstructure formed in the process endows the repair material with higher strength and toughness. Furthermore, the material has good compatibility with materials of a historic site body.

The invention relates to a three-dimensional ink for wall paper. The three-dimensional ink is prepared from the following raw materials in parts by weight by adding the raw materials into an agitating vessel and uniformly mixing and stirring the raw materials: 100 parts of acrylic resin emulsion, 0.1 to 25 parts of a filler, 0 to 15 parts of a pigment, 1 to 20 parts of thermal expansion micro-balloons, 0.5 to 10 parts of a film-forming agent, 0.5 to 3 parts of a defoaming agent and 0.5 to 2 parts of a thickening agent, wherein the filler is titanium pigment, and the pigment is an organic tinting pigment. The preparation method of the three-dimensional ink for wall paper comprises the following steps of: taking the raw materials in parts by weight, firstly adding the acrylic resin emulsion into the agitating vessel, adding the titanium pigment into the acrylic resin emulsion, and agitating the mixture uniformly; grinding the mixture of the titanium pigment and the acrylic resin emulsion in the agitating vessel by using grinding equipment; adding the film-forming agent, the defoaming agent and the thickening agent into the agitating vessel, and agitating the mixture uniformly; adding the thermal expansion micro-balloons into the agitating vessel, and agitating the mixture uniformly; and finally, adding the organic tinting pigment into the agitating vessel, and agitating the mixture uniformly to obtain the three-dimensional ink for wall paper.

Disclosed is an oriented, heat shrinkable, thermoplastic vacuum bag having a protective heat shrinkable patch attached thereto such that said heat shrinkable patch covers substantially all area exposed to bone, thereby protecting the bag from puncture by sharp protruding bones in bone-in cuts of meat which are vacuum packaged within the bags. The protection is especially directed to prevention of bag puncture by, bone-in cuts of both fresh and smoked or processed meat.

The invention belongs to the field of high polymer materials, and particularly relates to polyaryl ether nitrile resin, a polyaryl ether nitrile film and a preparation method thereof. The structure of the polyaryl ether nitrile resin is represented by formula I: n=40-80, m=10-20. Cross-linking groups are arranged at the chain end of the polyaryl ether nitrile resin, and the polyaryl ether nitrile resin has good curing reaction activity and can be used for preparing a corresponding polyaryl ether nitrile film. The polyaryl ether nitrile film is good in heat-resistant performance, the glass-transition temperature is 200 DEG C to 240 DEG C, the initial decomposition temperature is 560 DEG C to 580 DEG C, and carbon residue rate of thermal decomposition in nitrogen atmosphere at 800 DEG C is more than 69%. The polyaryl ether nitrile film is good in toughness, the elongation at break of the polyaryl ether nitrile film ranges from 8% to 12%, tensile strength is excellent, the tensile strength of the polyaryl ether nitrile film ranges from 80 MPa to 100 MPa.

The invention discloses modified water-based acrylate laminating adhesive used for plastic film compositing, and a preparation method and application of the modified water-based acrylate laminating adhesive. The laminating adhesive is prepared from compound emulsion and crosslinking agent, wherein the compound emulsion contains ethylene-acrylic acid emulsion (EAA emulsion) and acrylate emulsion, and the acrylate emulsion is prepared from soft monomers, hard monomers, crosslinking monomers, initiator, emulsifier and antiseptic 1, 2-benzene isothiazole-3-ketone. Due to the fact that the EAA emulsion is strong in the adhesive capacity to film base material and good in compatibility with the acrylate emulsion system, moreover the crosslinking agent polyether imide and the antiseptic 1, 2-benzene isothiazole-3-ketone are added, the obtained modified water-based acrylate laminating adhesive is good in compatibility among the component, capable of enabling the EAA to be cross-linked with long-chain molecules of the acrylate when the modified water-based acrylate laminating adhesive is dried to form a film, good in adhesion to the film base material, high in bonding strength and peel strength, good in stability and coating property and capable of effectively restraining the phenomenon of latex moulding and prolonging the quality guarantee period, and meanwhile has stability of the acrylate emulsion and the obdurability of the EAA emulsion.

The invention discloses a stainless steel seamless tube for a sodium-cooled fast reactor. Microalloying component fine adjustment is carried out based on a 316H stainless steel base material, the stainless steel seamless tube comprises the following components in percentage by mass: 0.04-0.05% of C, less than or equal to 0.6% of Si, 1.00-2.00% of Mn, less than or equal to 0.030% of P, less than or equal to 0.003% of S, 17.0-18.0% of Cr, 11.5-12.5% of Ni, 2.50-2.70% of Mo, less than or equal to 0.10% of Cu, 0.05-0.07% of N, less than or equal to 0.0015% of B, less than or equal to 30 ppm of O, less than or equal to 5.0 ppm of H and the balance of Fe and impurities, and the ferrite content is controlled to be less than or equal to 1%. The stainless steel seamless tube for the sodium-cooled fast reactor is manufactured through a high-purity smelting process, microalloying component fine adjustment, a stainless steel casting process, a hot perforation treatment process and finished product cold machining. By means of the mode, the stainless steel seamless pipe for the sodium-cooled fast reactor and a preparation method can meet the use standard of nuclear safety high-temperature nano pipelines, and the stainless steel seamless pipe has obdurability, corrosion resistance and durability.

The invention discloses a loudspeaker diaphragm preparation method, comprising: employing a high-molecular polymer as a base material; doping the base material with graphene materials through an in situ polymerization method or a solution mixing method to form a grapheme high-molecular polymer mixed material film; and preparing a loudspeaker diaphragm through laser cutting or punching. In the method, the graphene materials are introduced into the high-molecular polymer for mixing to form the grapheme high-molecular polymer mixed material film so as to prepare the loudspeaker diaphragm; because of the mechanical property of the graphene materials, the loudspeaker diaphragm has the characteristics of stronger robustness, shock resistance, abrasion performance and light weight.

The invention discloses a burnt stone-like sand-in-water environment-friendly paint with high stability and a preparation method thereof. The paint is composed of a base paint, protective glue, a continuous phase and a mortar material, wherein a weight ratio of the base paint to the protective glue to the continuous phase is 1-2: 0.35-0.75: 0.5-0.75, and a weight ratio of the mortar material to the gross weight of the base paint, the protective glue and the continuous phase is 1: 1. In the paint, the mortar material and the continuous phase both have sandy texture, so the spraying effect of the paint has stone permeability and a high simulation degree, lichee-surface effect of a burnt stone-like material can be obtained through direct spraying without priming of an intermediate base, one-shot forming is realized, and construction and material cost is saved; since an emulsion is prepared by using a special silane grafting process and a soap-free system, an obtained film has good sealing performance as regard to a substrate and excellent weatherability and stability; as the pain contains a special silane group, colored masterbatch in the sand-in-water paint has certain strength and toughness, so wearing of the colored masterbatch is prevented; and since the emulsion does not contain APEO, the paint meets requirements on greenness and environmental protection.

The invention discloses a three-dimensional porous micro-fluidic chip and a preparing method and application thereof. Foam metal serves as a template, a micro-fluidic chip material is used for copying the structure of the template integrally, and the metal template is removed to obtain a three-dimensional porous material; the three-dimensional porous material is modified in a silanized mode, pores are filled with temperature sensing materials, and after being integrated with the micro-fluidic chip, the temperature sensing materials are removed to obtain the three-dimensional porous micro-fluidic chip; functional groups of the surface of the three-dimensional porous material are activated and coupled with biomolecules to obtain the three-dimensional porous micro-fluidic detection chip. The three-dimensional porous micro-fluidic chip can be applied to biomedicine analysis and used for separating circulating tumor cells; the three-dimensional porous micro-fluidic chip has the advantages of having porosity, and being high in transparency and toughness and good in biocompatibility; the three-dimensional porous structure can fix a large number of biomolecules, and materials to be detected can be separated with high efficiency and high throughput. Preparation of the three-dimensional porous micro-fluidic chip is easy and easy to implement, and the chip is low in cost and good in repeatability.

The invention discloses a method for manufacturing a compound blade of an agricultural harvester. The compound blade comprises three metal layers, wherein the outer layer and the inner layer are made of low-alloy high-strength structural steel, and the middle layer is made of martensitic stainless steel. The method comprises the steps of: firstly, eccentrically pouring the outer metal layer, the middle metal layer and the inner metal layer on an eccentric pipe die; secondly, pushing a pipe and thermally treating to obtain an eccentric pipe blank; thirdly, ring-rolling the eccentric pipe blank; fourthly, annealing and thermally treating the rolled blank, wherein the annealing temperature is 660-920 DEG C; fifthly, cutting the rolled blank into a formed metal blade by using cutting methods without a thermal reaction region, such as water cutting, wire-electrode cutting and the like; and finally thermally treating the formed blade. The compound blade manufactured through the method in the invention has high flexibility and high wear resistance, and has an automatic blade grinding function.

The invention discloses a medical osteotome for mandible plastic surgery and a preparation method thereof. The medical osteotome comprises the following material components: 0.20% to 0.55% of C, 12% to 20% of Cr, 0.2% to 0.8% of Si, 0.5% to 1.5% of Mn, 0.3% to 1.0% of Ni, 0.5% to 1.5% of Mo, 0.2% to 0.5% of N, Fe and a small amount of impurity elements. The preparation method comprises the steps of heating a roughly machined osteotome blank to 1000 DEG C to 1050 DEG C for austenitizing; then, carrying out cryogenic treatment on the osteotome at the temperature of minus 60 DEG C to minus 130 DEG C; then, carrying out tempering on the osteotome at the temperature of 150 DEG C to 200 DEG C two times, wherein tempering is carried out for not less than 2 hours each time; then, air cooling the osteotome to the room temperature; and carrying out finish machining treatment on the osteotome blank to obtain a final finished product. The osteotome is applicable to mandible plastic surgery and has relatively high hardness and toughness, the edge of the osteotome is not liable to curl during the surgery, the service life of the osteotome is greatly prolonged, and safety and reliability of the surgery are guaranteed.

The invention relates to a whitening glaze slurry for high wear-resistant ceramic, and a preparation method thereof. According to the present invention, raw materials and water are mixed and ball milling is performed to obtain the glaze slurry, wherein the raw materials comprise, by weight, 14-20 parts of albite, 13-17 parts of limestone, 14-18 parts of quartz, 8-12 parts of frit, 1-3 parts of soda ash, 0.5-2.5 parts of white feldspar, 4-6 parts of a whitening agent, and 0.5-2.5 parts of a wear-resistant agent, wherein the whitening agent is prepared from 40-60 parts by weight of kaolin, 40-60 parts by weight of titanium dioxide, 1-2 parts by weight of calcium stearate, and 1-3 parts by weight of gamma-chloropropyltrimethoxysilane, and the wear-resistant agent is prepared from 2-4 parts by weight of yttrium oxide, 8-12 parts by weight of hydroxyapatite, 8-18 parts by weight of calcined talc, and 0.2-0.4 part by weight of an aluminum zirconium coupling agent; and the whitening glaze slurry has characteristics of reasonable raw material, simple preparation method, low production cost and good performance, and is worthy of popularizing and applying.

The present invention discloses a preparation method of loudspeaker diaphragm based on graphene and polyetherimide. High-molecular polymer polyetherimide is taken as base materials to dope with graphene materials through the high-temperature fusion method to form PEI-graphene material mixed slurry, and a pouring method is employed to perform cooling and solidification of the mixed slurry and perform compaction so as to composite a loudspeaker diaphragm. The prepared composite diaphragm has high electroacoustic efficiency and high robustness, is simple in preparing technology and is suitable for popularization and application.

The invention discloses a high-temperature-resistant composite material with a nuclear radiation shielding effect. The high-temperature-resistant composite material is prepared from, by weight, 50-90 parts of polyimide resin matrix, 5-15 parts of reinforcing materials, 2-10 parts of boron carbide, 1-20 parts of lead, 1-5 parts of a coupling agent and 1-5 parts of processing agents. The polyimide resin matrix, the reinforcing materials, boron carbide, lead, the coupling agent and the processing agents are stirred and uniformly mixed in a high-speed mixer to prepare plates, rods and workpieces by means of melt processing forming. The high-temperature-resistant composite material is 89%-98% in neutron shielding ratio, 75%-85% in gamma ray shielding ratio and 195-285DEG C in heat resistance temperature, can be used as a structural material, is available for shield protection of various radioactive sources such as isotope neutron sources, nuclear reactors and accelerators and is especially applicable to shield protection under complex nuclear radiation conditions.

The invention provides a water-based acrylic thermal-conductive double-sided tape and a preparation method of the double-sided tape, comprising an upper pressure-sensitive adhesive layer, a glass fiber fabric layer and a lower pressure-sensitive adhesive layer, wherein two sides of the glass fiber layer is coated with the upper pressure-sensitive adhesive layer and the lower pressure-sensitive adhesive layer, respectively, and the upper and lower pressure-sensitive adhesive layer are water-based acrylic thermal-conductive pressure-sensitive adhesive layers. The water-based acrylic thermal-conductive double-sided tape combines the characteristics of a thermal-conductive material and an adhesive tape, namely, high-effective thermal-conductivity, easy operation and powerful adhesion of an adhesive tape, and excellent electrical insulated effect, and is widely used in industries and fields such as high-power transistors, heat sinks, integrated circuits, filler of a gap between a metal structure and a chassis, LED (light-emitting diode) display screens, notebook computers, mobile phones and the like.

The invention discloses water-permeable concrete and a preparation method thereof. The concrete is prepared from the following components in parts by weight: 10-15 parts of acrylate water-based laminating adhesive, 1500-1600 parts of crushed stone, 100-200 parts of super absorbent resin microspheres, 300-400 parts of cement, 5-7 parts of polyol, 5-10 parts of triisopropanolamine, 10-15 parts of nano calcium carbonate, 1-5 parts of nano silicon particles, 2-4 parts of sodium lignin sulfonate, 4-6 parts of an emulsifier and 130-160 parts of water. The acrylate water-based laminating adhesive isprepared from an ethylene-acrylic emulsion, an acrylate emulsion and a cross-linking agent; the cross-linking agent comprises polyetherimide. The water-permeable concrete can improve the water permeability and the bearing capacity, is not prone to breakage and has high freezing and thawing resistance and durability.