57results about How to "Eliminate brittleness" patented technology

An improved energy absorbing member comprising, an thermoplastic cellular polymer in contact with a structural element such as a metal guard rail or automotive door, wherein the cellular polymer has an average cell size of at least about 0.75 mm and at least one of C_E/C_T, C_V/C_T and C_H/C_T is about 0.25 to about 0.4 said one of C_E/C_T, C_V/C_T and C_H/C_T having a compressive efficiency of at least 70% at a 60% strain, C_E, C_V and C_H being the compressive strength of the cellular polymer in each of three orthogonal directions E, V and H where one of these directions is the direction of maximum compressive strength in the foam and C_T equals the sum of C_E, C_V and C_H.

The invention discloses a heat-conducting electric-insulating epoxy resin potting adhesive which is composed of an epoxy resin, a curing agent, a toughener, a diluter, a filler, an accelerator and a defoaming agent. The component A is composed the following components in parts by weight: 100 parts of epoxy resin, 10-30 parts of diluter, 5-15 parts of filler, 0.5-1 part of defoaming agent and 3-5 parts of coupling agent. The component B is composed the following components in parts by weight: 78-145 parts of curing agent, 10-40 parts of toughener, 5-10 parts of filler, 0.1-3 parts of accelerator and 0.5-1 part of defoaming agent. The A/B weight ratio is 1:1. The toughener is epoxy hydroxyl-terminated polybutadiene acrylonitrile. The filler is composite powder composed of nano magnesium silicon nitride, nano silicon carbide, nano aluminum nitride, nano boron nitride, high-sphericity nano aluminum oxide and nano silicon nitride with different particle sizes, and the average particle size is 40-60nm. The potting adhesive has the advantages of favorable thermal conductivity and favorable electric insulating property.

The invention discloses a continuous brazing composite aluminum-based brazing wire applying nanometer aluminum trioxide and a preparation method of the continuous brazing composite aluminum-based brazing wire applying the nanometer aluminum trioxide. The continuous brazing composite aluminum-based brazing wire applying the nanometer aluminum trioxide is composed of an aluminum-based brazing filler metal core material with a groove formed in the outer surface, a no-corrosive flux used for aluminum and applied in the peripheral groove of the core material in a wrapping manner, and a coating layer sprayed on the surface of the composite brazing flux. The obtained product is excellent in material performance, easy to machine and form, good in brazing process performance, capable of fully adapting to efficient and continuous brazing and excellent in brazing connector performance.

Provided are low-melt polyimides and poly(amic acids) (PAAs) for use in repair of electrical wire insulation, flat or ribbon wire harnesses, and flat surfaces comprised of high-performance polymers such as inflatables or solar panels applications. Also provided are methods and devices for repair of electrical insulation.

The invention relates to a steel structure building beam or a steel structure pillar node interface, which is used for connecting convergent nodes of a steel structure building beam or a steel structure pillar and overcoming the shortages of toilsome assembly, bad accuracy, low connection strength, and the like in the existing connection mode. The steel structure building beam or pillar node interface is composed of joints of the end part of the beam or the pillar and joint seats converged on the node, wherein the joints lack a half at the end part in the horizontal direction to form a ladder shape. The shape and the size of the joint seats are the same with that of the joints. A connection insertion tenon is arranged on a mutual faying surface formed when the joint is butt jointed with the joint seat, the connection insertion tenon is vertical to the faying surface and a fastening structure for preventing the joint and the joint seat from horizontally separating is arranged at the faying position of the joint and the joint seat. According to invention, the steel structure building beam or pillar node interface has the beneficial effects that the faying mode bearing of the interface has large bearing capacity; the steel structure building beam-pillar node interface has high longitudinal tensile strength, is provided with the fastening member for preventing the joint and the joint seat from horizontally separating so that the connection of the node of the beam and the pillar has multi-directional higher anti-breaking strength, has a simple structure, and is convenient to manufacture and install; and with the adoption of the steel structure building beam or pillar node interface, the conditions are created for modularization, standardization and serialization of steel structure housing construction.

The invention belongs to the chemical field and in particular relates to regenerated sponge rubber and a preparation method thereof. The regenerated sponge rubber is prepared from the following raw materials in parts by weight: 45-85 parts of polyether polyol, 1.5-4.0 parts of a catalyst, 20-25 parts of a diluent and 10-15 parts of polyisocyanate, wherein NCO percent of a synthetic product is 5.0-7.0 percent. The preparation method comprises the following steps: raising temperature of the polyether polyol until 100-110 DEG C, carrying out vacuum dewatering for 2-2.5h, cooling to 50-60 DEG C, adding the polyisocyanate, raising temperature until 80-85 DEG C, reacting for 2-3h, cooling below 50 DEG C, adding the diluent and the catalyst, and stirring for 20-30min to obtain the synthetic product. The regenerated sponge rubber has the advantages of high bonding degree, good toughness, large tear strength, no peculiar smell, environmental protection, no three wastes discharge in production of the product and the like.

The invention belongs to the technical field of food processing, and particularly relates to preserved donkey-hide gelatin hawthorns and a production method thereof .The preserved donkey-hide gelatin hawthorns are made from, by weight, 40-70 parts of hawthorns, 1-3 parts of donkey-hide gelatin, 250-350 parts of white granulated sugar and 65-94.5 parts of fructose .The production method includes the steps of material selecting, soaking, sugar liquor precooking, sugar liquor soaking, cooking and sugaring, baking, shaping and packaging .By preparing sugar liquor into a solution with mass concentration changing in a gradient mode and cooking the solution in twice, the preserved donkey-hide gelatin hawthorns prepared according to the optimal ratio of white granulated sugar to fructose are excellent in taste and good in property, are light red and semitransparent, have functions of softening blood vessels, reducing pressure and lipid, activating blood circulation to remove stasis, tonifying the spleen and removing food retention, and nourishing blood and keeping beauty, and are healthy food suitable for people of all ages and convenient to eat.

The invention discloses a passion fruit and pine needle tea drink which specifically comprises passion fruit juice and pine needle juice. A preparation method of the passion fruit and pine needle tea drink comprises the following steps: firstly, preparing passion fruit pulp into passion fruit juice, and meanwhile, acquiring pine needle leaves as raw materials and boiling in water to prepare pine needle juice; then, uniformly mixing the passion fruit juice with the pine needle juice in proportion to obtain the passion fruit and pine needle tea drink. According to the passion fruit and pine needle tea drink, a formula and a preparation process are simple; the prepared tea drink is good in palatability; the effects of the two raw materials in the formula supplement each other, so that the prepared tea drink can build bodies, improve the immunity, delay ageing, maintain beauty and keep young, and is first-class health tea; in addition, the prepared passion fruit and pine needle tea drink is low in cost, good in health effect and suitable for most people, and has very good market prospects.

The invention discloses a manufacturing method of a composite shear blade, and belongs to the technical field of shear blade manufacturing and processing. The manufacturing method comprises the following specific steps: step 1, manufacturing a blank, step 2, forging and compounding two materials, step 3, spheroidizing and rough machining, step 4, heat treatment, and step 5, detection. The shear blade can be used for shearing high-precision and high-strength steel plates, is made of composite materials, adopts about half of carbon steel materials, reduces the content of precious metal, saves the cost and is environmentally friendly, meanwhile, the brittleness of the shear blade is reduced, so that the cracking phenomenon is reduced.

The invention relates to a styrene elastomer geogrid prepared by processing the following raw materials in parts by weight: 70-80 parts of PP resin, 20-30 parts of styrene elastomers, 0.2-0.4 part of barium stearate, 0.2-0.4 part of antioxidant 300, 0.1-0.2 part of antioxidant 1076, 0.1-0.3 part of ultraviolet absorbent UV-9 and 25-35 parts of modified filler. The preparation method of the styrene elastomer geogrid comprises the steps of mixing all the materials in the formula, and extruding to obtain a melt; forming a plate from the melt by using a three-roll calendar; punching the plate by using a punching machine; and stretching after heating the pore plate to obtain the geogrid. The modified geogrid prepared by processing the raw materials is high in stretching strength, corrosion-resistant, good in mechanical properties and low in production and processing costs.

The invention relates to a nitriding furnace with a magnetic field auxiliary mechanism. The nitriding furnace with the magnetic field auxiliary mechanism is mainly characterized in that connecting pieces are arranged on two opposite sides in a furnace shell and are each provided with a flat plate-shaped magnet frame; the two flat plate-shaped magnet frames are parallel to a center line of a side through hole of the furnace shell; an upper horizontal strip-shaped baffle plate, a middle horizontal strip-shaped baffle plate and a lower horizontal strip-shaped baffle plate are arranged on each magnet frame and are connected with the magnet frames through fastening pieces; two electromagnets arranged in parallel to form a group and provided with iron blocks in coils are clamped between each baffle plate and the corresponding magnet frame; two guide wires of each group of electromagnet coils are connected with a binding post arranged on a side furnace cover; and the upper groups of electromagnets, the middle groups of electromagnets and the lower groups of electromagnets on two sides of the furnace shell are symmetrically arranged. According to the nitriding furnace with the magnetic field auxiliary mechanism provided by the invention, the workpiece nitriding speed can be accelerated, the nitriding time is short, a nitriding cycle is greatly reduced, the process cost is reduced, theworkpiece deformation is reduced, the quality of a nitriding layer is improved, the nitrogen-containing concentration of the nitriding layer of a workpiece is increased, the fragility of the nitridinglayer is eliminated, and a mechanical property of a surface layer is improved; and the nitriding furnace with the magnetic field auxiliary mechanism is advanced and reasonable in structure, convenient to operate, reliable to operate, and durable in use.

The invention discloses a resistance welding technology with online continuous weld heat treatment. The method comprises the following steps: (1) The online strip steel is sheared and seamed in the shearing station of the welding process. (2) After shearing and seaming, the welding area of the online strip steel is online continuously preheated by the preheating device in the preheating station of the welding process. (3) After preheating, the online strip steel is welded in the welding station of the welding process. (4) After welding, the welding area of online strip steel is online continuously welded and normalized by the normalizing mechanism in the normalizing station of the welding process. (5) After normalizing, the welding area of the online strip steel is online continuously welded and rolled by the rolling device in the rolling station of the welding process. (6) After rolling, the welding area of the online strip steel is online continuously welded and tempered by the tempering mechanism in the tempering station of the welding process or online continuously welded and taken brittle processing by the brittle processing device in the brittle processing station of the brittle processing process. The resistance welding technology with online continuous weld heat treatment is suitable for welding.

Provided are low-melt polyimides and poly(amic acids) (PAAs) for use as adhesives, and methods of using the materials for attaching two substrates. The methods typically form an adhesive bond that is hermetically sealed to both substrates. Additionally, the method typically forms a cross-linked bonding material that is flexible.

A cold-pressed equistrength archor rod for supporting gallery has rod body and end part, and is made through cold (rolling) pressing the rolled rod body with axial spiral ribs to remove the ribs at head part and become a cylinder, and screwing the cylindrical head part. Its advantages are high strength, strong anchor power, and no stress concentration.

The invention discloses a low-carbon low-boron low-chromium alloy steel, and a preparation method thereof, and belongs to the technical field of alloy steel manufacturing. According to the preparationmethod, low-carbon low-boron low-chromium materials are combined with cerium rare earth, vanadium, tungsten, copper, tantalum, cobalt, niobium, and the like, technical target value determination, material preparation, melting, sampling adjusting, casting moulding, and heat treatment are carried out so as to obtain the low-carbon low-boron low-chromium alloy steel at last; the hardness is HRC42-52, the impact energy is as high as 11 to 20 joules. The preparation method is capable of guaranteeing the certain hardness of the alloy steel, and at the same time, improving the impact resistance, thetoughness, and the wear resistance greatly.

The invention discloses a resistance welding machine with online continuous weld heat treatment, including a welding carriage, a shearing device, a resistance welding device and a rolling device. The welding carriage is provided with a preheating device and a heat treatment device. The next step after the process of welding is a brittle processing procedure, and the position of the brittle processing procedure is provided with a brittle processing device. The brittle processing device includes an auxiliary trolley, and a water tank, an annealing mechanism and a circulating water cooler, and they are arranged on the auxiliary trolley in order. A rapid cooling nozzle which can quickly cool down the both sides of the welding area of the online strip steel is arranged in the water tank and on the upper portion of the water tank which the auxiliary trolley corresponds to. The rapid cooling nozzle is connected with the outlet of the circulating water cooler. The heat treatment device includes a normalizing mechanism and a tempering mechanism. The normalizing mechanism is provided between the resistance welding device and the rolling device, and the tempering mechanism is provided behind the rolling device. The resistance welding machine with online continuous weld heat treatment is suitable for welding machine.

The invention discloses a steel wire heat treatment quenching process. The steel wire heat treatment quenching process comprises the following steps of leading out a steel wire through a roller of a pay-off machine, horizontally outputting the steel wire after passing through a positioning device, and heating the steel wire to 900-950 DEG C to convert the structure into austenite; quenching and preserving heat the austenite in molten lead or salt (a mixture of sodium nitrate and potassium nitrate or calcium chloride, sodium chloride and potassium chloride) with the temperature of 480-550 DEG C for a period of time to enable the austenite to be subjected to isothermal transformation into fine pearlite, heating the wire to the temperature above a critical point, preserving heat for a certain time, and quickly cooling to a standard value temperature; the heat preservation time is long enough to form a required spheroidized structure; heating to the temperature above the upper critical point, quickly cooling to the temperature which is about 30 DEG C higher than the standard value, and cooling to the temperature below the lower critical point (about 650 DEG C) at the speed of 5 DEG C/h; heating to a lower critical point or a slightly lower temperature, preserving heat for enough time to form a required spheroidized structure (generally 8-12 hours), and heating the steel wire to 30-50 DEG C above the lower critical point.

The invention discloses a laser welding machine provided with on-line continuous heat-treatment for welding seam. The laser welding machine comprises a welding trolley, and the welding trolley is provided with a pre-heating device and a heat-treatment device, a shearing device, a laser welding device and a rolling device. The next step of welding process is the brittleness treatment process whose position is provided with a brittleness treatment devise. The brittleness treatment devise comprises an auxiliary engine trolley and a water tank, an annealing mechanism and a circulating water cooler, which are arranged on the auxiliary engine trolley in sequence. A rapid cooling sprayer which is used to cool rapidly the front and back of on-line strip steel welding area, is arranged on each position in the water tank and above the auxiliary engine trolley. The rapid cooling sprayer is communicated with the output port of the circulating water cooler. The water tank is communicated with the input port of the circulating water cooler. The heat-treatment device comprises a normalizing mechanism and a tempering mechanism. The normalizing mechanism is provided between the welding devise and the rolling device, and the tempering mechanism is arranged at the rear of the rolling device. The laser welding machine provided with on-line continuous heat-treatment for welding seam is suitable for welding machines.

The invention discloses an argon arc welding technique with online and continuous weld heat treatment, which comprises the steps of shearing joint, preheating, welding, normalizing and tempering . (1)The online strip steel is sheared and pieced by shearing device on the shearing station of the welding process. (2)The welding area of the online strip steel carries out online and continuous preheating by heat-treating device on the heat-treating station of the welding process after being sheared and pieced. (3)The online strip steel carries out welding by argon arc welding car on the welding station of the welding process after being preheated. (4a)The welding area of the online strip steel carries out online and continuous normalizing treatment through normalizing mechanism on the normalizing station of the welding process after being welded. (4b)The welding area of the online strip steel carries out online and continuous tempering treatment through the tempering mechanism on the tempering station of the welding process after normalizing treatment, or the welding area of the online strip steel carries out online and continuous welding brittleness treatment by the brittleness treatment device in the place of the brittleness treatment process. The brittleness treatment process suitable for welding is the next process after welding.