12results about How to "Avoid brittle cracking" patented technology

The medium-temperature radial forging method comprises the steps that pretreatment is conducted, specifically, a niobium-tungsten alloy extrusion bar blank is heated for 60-180 minutes at the temperature of 750-950 DEG C, rapid forging and straightening are conducted, and a medium-temperature radial forging bar blank is obtained and annealed for 60-120 minutes at the temperature of 1250-1450 DEG C; medium-temperature radial forging is conducted, specifically, a two-step method is adopted, in the first step, a bar blank is preheated to 80-100 DEG C and coated with Ta1350 high-temperature glass powder, heat preservation is conducted for 90-180 minutes at the temperature of 1050-1150 DEG C, and the bar blank is forged into a bar with the diameter of 70 + / -1 mm in the mode that the diameter is reduced by 7-10 mm every time; and in the second step, the heating and coating processes are repeated, the diameter is reduced by 5-7 mm every time, and the bar with the required specification is manufactured. By optimizing the medium-temperature forging and annealing process, the fine grain structure is controlled, the high-temperature mechanical property, creep resistance and oxidation resistance of the material are improved, and the material is suitable for aerospace engines and other high-temperature and high-pressure scenes. Compared with a traditional method, the technology improves the yield, shortens the production period, reduces the labor intensity, is suitable for large-scale production, reduces surface air suction, oxidation and burning loss, and improves the production efficiency and the finished product quality.

The invention discloses a low-expansion three-temperature cold and hot plate and a preparation method, and belongs to the field of precise alloy components. The cold and hot plate is made of titanium-niobium-based alloy, the titanium-niobium-based alloy comprises, by atomic percent, 25%-35% of Nb, the total content of V and / or Ta smaller than or equal to 3% and the balance Ti, the titanium-niobium-based alloy comprises a three-temperature structure of a low-temperature adaptation area, a normal-temperature stable area and a high-temperature tolerance area, the thickness of the titanium-niobium-based alloy ranges from 1.5 mm to 2 mm, and the surface of the titanium-niobium-based alloy is provided with a nitride layer or a passive film. The preparation method comprises the steps of burdening, 2-3 times of vacuum consumable smelting, hot forging, hot rolling, partition cutting, pre-deformation regulation and control, solid solution quenching, cold rolling finishing, splicing forming and the like, and vacuum stress relief annealing and dual performance detection are matched. The method is suitable for scenes such as chip packaging and precision detection, and is low in cost and high in qualified rate.

The application relates to the technical field of coil coating, and discloses a radiation refrigeration coil coating composition, a coating and application, the coating composition comprises a basecoat composition and a topcoat composition which are arranged independently. The basecoat composition comprises polyvinylidene fluoride resin slurry, hydroxy acrylic resin, heat-reflecting filler and blocked polyisocyanate curing agent; the topcoat composition comprises polyvinylidene fluoride resin slurry, hydroxy acrylic resin, heat-emitting filler and topcoat crosslinking agent. The application sets the unblocking starting temperature of the basecoat curing agent to be lower than the starting temperature of the topcoat crosslinking reaction, realizes gradient crosslinking of a multilayer coating film from bottom to top, and solves the exhaust blistering defect during baking of a thick coating film. The glass transition temperature of the multilayer coating body is controlled to be 35 DEG C to 50 DEG C, the deformation requirement of warm stamping processing is met, and the coating film is prevented from cracking.

The electromagnetic valve comprises a valve body, a coil assembly and a clamping plate, the valve body comprises an inlet, an outlet and an internal flow channel for liquid to flow to the outlet along the inlet, and a cavity wall is arranged at the top of the valve body; a first opening axially extending to the top of the cavity wall and a second opening communicating with the bottom of the first opening and extending in the circumferential direction of the cavity wall are formed in the inner side of the cavity wall, and a third opening is formed in the outer side of the cavity wall; the coil assembly comprises a positioning pin and a movable iron core assembly, the positioning pin is arranged on the periphery of the bottom of the coil assembly, the positioning pin can move along the first opening and be screwed into the second opening so that the coil body can be connected to the valve body, and the movable iron core assembly can axially move to control on-off of the internal flow channel; the clamping plate comprises a clamping plate body, a first clamping piece and a second clamping piece, the first clamping piece and the second clamping piece are connected to the same side of the clamping plate body, the first clamping piece can be inserted into the first opening, the second clamping piece is used for being connected with the third opening in a clamped mode, and material brittle cracking caused by connection of all components through screws is avoided.

The utility model relates to door and window installation technical field provides a connecting assembly and door and window installation assembly, above -mentioned connecting assembly includes: pole body, two flaps, torsional member and first limit piece, the side of pole body is provided with the protruding axle body, and pole body is used for the first connecting hole and second connecting hole of wearing and setting. Two flaps can rotate and set up in axle body. Torsional member, set up between two flaps, drive two flaps to unfold to two sides respectively to the pole body, to be connected in the clamping groove of the section bar away from the one side of support. First limit piece, set up in pole body, are used for abutting on the one side of support away from section bar. The utility model discloses connecting assembly, two flaps will unfold to two sides automatically under the drive of torsional member after passing through second connecting hole completely, and be connected in the clamping groove of section bar, and the second limit piece of other side will support be pressed on section bar to fix section bar and support, in the whole process, the hole wall of second connecting hole of section bar will not be extruded and rubbed.

The utility model belongs to the technical field of mixed pipeline, disclose a kind of mixed pipeline with erosion-resistant coating, including pipeline base body and the erosion-resistant coating structure being set on the inner wall of pipeline base body, and the inner wall of pipeline base body is provided with anchoring structure;Erosion-resistant coating structure includes the transition layer being combined with the inner wall of pipeline base body and the functional wear layer being covered on transition layer, and transition layer fills and mechanically fits in anchoring structure, and anchoring structure is the blind hole of uniform array distribution, and the depth of blind hole is 0.5-2mm, and diameter is 1-3mm, and transition layer is the metal material layer of porous structure, and functional wear layer is the metal matrix composite material layer of high hardness ceramic particle reinforcement.The utility model is cooperated by anchoring structure and porous transition layer, forms the double combination mechanism of mechanical fitting and material penetration, fundamentally solves the early failure problem caused by the insufficient interface bonding force of traditional coating, especially applicable to the mixed pipeline environment of high erosion, high shear force.

This invention relates to the field of multilayer curable base film technology, specifically to the online coating of polyester optically curable base films and its preparation method. This invention overcomes the problem in existing technologies where the adhesion and optical performance of the curable base film cannot be simultaneously achieved. First, this invention obtains core-shell structured functional particles by modifying in-situ polymethyl methacrylate with nano-silica; second, it obtains modified PET by melt blending optical-grade PET chips; finally, it melts the functional particles and modified PET to obtain an anti-adhesion masterbatch, prepares a composite base film through three-layer co-extrusion and biaxial stretching, coats it with a functional coating liquid, cures it stepwise to form a curing layer, and then heat-sets it to obtain the optically curable base film. Through base film modification, functional particle core-shell design, three-layer co-extrusion structure, and the synergistic effect of coating and process, this invention produces a polyester optically curable base film that combines high optical performance and good coating adhesion, applicable to release protection in the electronics field, decoration in the home appliance field, and other fields.

The application belongs to the technical field of artificial quartz stone, and particularly relates to low-water-absorption high-strength artificial quartz stone and a preparation method thereof. The low-water-absorption high-strength artificial quartz stone comprises the following raw materials in parts by mass: quartz sand 57-63 parts, quartz powder 25-30 parts, unsaturated polyester resin 6-9 parts, curing agent 0.15-0.20 parts, coupling agent 1-2 parts, and color paste 0.5-2 parts. The application solves the pain points such as cracking, seepage and abrasion of traditional artificial quartz stone in high-strength application scenarios, significantly prolongs the service life of the product, reduces the maintenance cost, can replace natural stone and high-end ceramic tiles, is widely applied to commercial space, home decoration and special engineering fields, meets the urgent needs of the market for high-performance and durable decorative materials, and has extremely high economic value and market competitiveness.

The invention discloses a high-weather-resistance wide-temperature-range bottom filling adhesive for semiconductor packaging and a preparation method thereof, and relates to the technical field of filling adhesives for semiconductor packaging, and the preparation method comprises the following steps: synthesizing glycidyl sulfonate by taking bio-based glycidyl and sulfonyl chloride as raw materials, and synthesizing halogen-free DGEBA resin by taking bisphenol and glycidyl sulfonate as raw materials; the preparation method comprises the following steps: synthesizing phosphorylated modified resin by taking halogen-free DGEBA resin and phosphoryl chloride as raw materials; the preparation method comprises the following steps: uniformly stirring and melting halogen-free DGEBA resin and phosphorylated modified resin, adding a cross-linking agent, and uniformly stirring to obtain a resin matrix; the preparation method comprises the following steps: sequentially adding the siloxane latent accelerator and the composite filler into the resin matrix, stirring in vacuum, defoaming, adding the initiator, uniformly stirring, injecting into a mold, heating, curing, and cooling to room temperature to obtain the filling adhesive for semiconductor packaging, the composite filler is prepared from KH550 modified FeNi alloy particles.

The present invention relates to the field of vacuum coating technology, and more specifically, it relates to an anti-skid coating process for the surface of a laptop computer shell. An anti-skid coating process for the surface of a laptop computer shell comprises the following steps: shell substrate pretreatment, AlMnCe alloy target material preparation, surface vacuum coating processing, coating layer protective paint preparation and coating layer protective treatment. The present invention forms an Al-Ti transition layer, an AlMnCe layer, a cerium oxide and silicon dioxide mixed coating layer by sequentially depositing on the surface of the shell substrate. The Al-Ti transition layer, the AlMnCe layer, the cerium oxide and silicon dioxide mixed coating layer together constitute the coating layer, which helps to increase the hand resistance of the shell substrate surface, improve the wear resistance and anti-skid performance of the shell substrate surface, and the coating layer is coated with protective paint on the surface of the coating layer, which can further increase the surface roughness of the coating layer and further improve the anti-skid performance of the laptop computer shell.

This invention discloses a nanocomposite powder for thermal spraying and its preparation method, belonging to the field of thermal spraying materials technology. The nanocomposite powder, by mass fraction, consists of 60.0%-80.0% nickel-based alloy matrix, 15.0%-35.0% composite nano-ceramic particles, 1.0%-5.0% rare earth modifier, and 0.5%-2.0% dispersant. The preparation method includes raw material pretreatment, slurry preparation, spray drying, segmented low-temperature sintering, and graded screening. This invention utilizes the aforementioned nanocomposite powder for thermal spraying and its preparation method. Through component synergy and process optimization, it effectively inhibits nanoparticle agglomeration, improves interfacial bonding stability, and the prepared powder is compatible with existing thermal spraying equipment. After spraying, the coating hardness is ≥65HRC, the bonding strength is ≥60MPa, the high temperature resistance can reach 800-1000℃, and the wear resistance is significantly improved.

The application provides a low-temperature adaptive packaging adhesive film composition, a low-temperature adaptive packaging adhesive film and a preparation method thereof, a photovoltaic module and a photovoltaic system, and relates to the photovoltaic field. The raw materials of the low-temperature adaptive packaging adhesive film composition include, according to the total mass of 100%, 40%-60% of a copolymer resin, 15%-30% of a modified thermoplastic elastomer, 5%-15% of an additive and 10%-20% of a filler; the copolymer resin includes an ethylene-acrylate-norbornene terpolymer; and the raw materials of the modified thermoplastic elastomer include maleic anhydride and a styrene thermoplastic elastomer. The low-temperature adaptive packaging adhesive film composition can still maintain good flexibility in a low-temperature environment, and will not become hard and brittle due to low temperature, thereby effectively avoiding problems such as rupture and delamination caused by the brittleness of the adhesive film.