1156 results about "Hot stamping" patented technology

The invention discloses a steel plate for stamping and quenching and a thermoforming method of the steel plate. The steel plate comprises the following chemical components in percentage by weight: 0.14-0.28% of C, less than 0.40% of Si, 0.4-2.0% of Mn, less than or equal to 0.010% of P, less than or equal to 0.004% of S, 0.016-0.040% of Al, 0.15-0.8% of Cr, 0.015-0.12% of Ti, 0.0001-0.005% of B, less than or equal to 0.005% of N, and the balance of Fe and inevitable impurities. The thermoforming method comprises the following steps: blanking by shearing the steel plate, and heating at Ac3 to (Ac3+80) DEG C to carry out austenization; after insulating for 5-10 minutes in the heating furnace, immediately transferring the steel plate to a metal mold the inside of which is cooled by introducing water, and stamping at the high temperature of 650-850 DEG C; cooling the formed workpiece in the closed mold, and cooling the mold by water circulation in the mold, wherein the cooling rate is greater than the critical cooling rate when austenite forms martensite, and the temperature of the workpiece leaving the hot stamping production line is below 150 DEG C; and carrying out air-cooling to room temperature. The steel plate has the advantages of simple component system and favorable hardenability; and the substrate tissues, which are ferrite and pearlite, are processed by hot stamping andquenching to obtain the all martensitic structure. The tensile strength of the steel plate can be higher than 1300 N/mm<2>.

The invention provides a new process of quick superplastic forming of automotive body parts of aluminum alloy automobiles, which is mainly characterized in that hot stamping is combined with superplastic gas-bulging forming, so that the advantages of the hot stamping and the superplastic gas-bulging forming are relatively complemented to achieve the aim of quick superplastic forming. The process reduces the requirements of the conventional superplastic forming on grain sizes of sheet materials, and allows for the use of ordinary commercial aluminum alloy sheet materials. Compared with a cold stamping process, the new process has the advantages of overcoming the drawbacks of cracks and large springback, along with fewer working procedures and high yield; and compared with the conventional superplastic forming process, the new process improves the forming speed obviously, and reduces the material cost. The new process eliminates the technical barriers in making light weight automobile bodies of the low and medium-grade automobiles by using aluminum alloy, and is an efficient and high-quality process for the mass production of the automobile bodies of the aluminum alloy automobiles.

The invention provides a high security, high accuracy and thermal forming martensite steel part preparing method, which belongs to the field of obtaining controlling and cooling technology of the hot stamping forming part of the alloy steel plate, the martensite works as the matrix structure of the alloy steel plate. The method adopts the processes as follows: a steel plate is heated to 20 to 250 DEG C above the Ac3 temperature, therefore an austenite structure can be obtained, then the steel plate is transferred to the stamping die for forming by stamping; simultaneously, the temperature of the stamping die is controlled in a range of 100 to 400 DEG C, 5 to 60 seconds later after stamping forming, the formed component parts can be taken out of the stamping die. The method has the advantages that a well ductility and security can be obtained, and the anti-susceptibility of the steel can be greatly enhanced.

The invention relates to an ultrahigh-strength steel laser tailor welded blank and a forming process thereof. The forming process provided by the invention comprises the following steps: carrying out the laser tailor welding on ultrahigh-strength steel and high-strength steel according to the needed shape; then, delivering the obtained welded blank to a furnace filled with a protective gas and heating to 920-940 DEG C to be continued for at least 5 minutes; fully austenitizing; transferring the austenitized welded blank to a press machine to be rapidly molded and formed; cooling to 100-150 DEG C through pressurization quenching; and cooling along room temperature to obtain the needed parts. The hot stamping process of the laser tailor welded blank provided by the invention has the double advantages of the forming and hot stamping forming of the laser tailor welded blank and simultaneously solves the problems that the ultrahigh-strength steel is difficultly applied to the production ofautomobile structural components/framework components in a laser tailor welded blank mode.

The invention discloses a production method of hot stamping foil, which adopts six production process flows: release coating, protective layer coating, color layer coating, accurate aluminizing and curing glue layer coating. In the whole production process, water soluble glue, water soluble ink and water soluble gloss oil are used to realize the integrated production of the hot stamping foil, methacrylates and monomers which are emulsified and polymerized are mixed in a certain ratio, a dye leveler, thickener and the like are added in the mixture, the resulting product is coated and dried, polyvinyl butyral-based glue is coated, and the whole production of the hot stamping foil is finished. The hot stamping foil produced by the process has the characteristics of energy conservation, environmental protection and sanitation.

The invention discloses an ultra-high strength steel plate thermal die cutting and forming die, comprising an upper die seat and a convex die which is fixed on the upper die seat, a lower die seat and a concave die that is fixed on the lower die seat; the concave die is internally provided with a cooling water passage which is connected with a cooling water circulation system. More particularly, the concave die is compose of a trough-shaped concave die seat and a cavity body; the concave die seat is provided with a water inlet and a water outlet; the cavity body is arranged in the concave trough of the concave die seat; a gap is arranged between the cavity body and the concave die seat; the gap is communicated with the water inlet and the water outlet. The die improves cooling speed, ensures the uniformity of cooling, has simple and practical structure, and fast cools the die and the punching parts in the die by the water cooling system of the die, so as to achieve the effect of quenching. As the process is completed under the pressure preservation process of the die, the workpiece has extremely small deformation and the dimension precision of the punching part can be excellently ensured.

The invention discloses a hot stamping forming method for a variable strength distribution strong-strength steel plate part, relates to a hot-stamping forming method for a strong-strength steel plate part, and aims to solve the problems of difficulty in the effective adjustment of strength of different parts and incapability of obtaining rational strength distribution in a hot stamping forming process of a strong-strength steel plate. The method comprises the following steps of: 1, placing a strong-strength steel plate blank to be formed into a heater, and performing zonal control on first, second and third zones of the heater by correspondingly adopting different or the same heating temperature and different or the same heating time; 2, quickly transferring the heated strong-strength steel plate blank into a forming die within 3 to 5 seconds, quickly closing the forming die, and forming the strong-strength steel plate blank within 1 to 3 seconds; 3, keeping the forming die closed, and introducing cooling water into cooling holes in the forming die to reduce the temperature of the forming die to quench the strong-strength steel plate part; and 4, after the quenching is completed, opening the forming die, and taking out the obtained strong-strength steel plate part. The method is used for the hot forming of the strong-strength steel plate.

A hot-stamped steel according to the present invention includes, by mass %, C: 0.20% to 0.35%, Si: 0.1% to 0.5%, the total of at least one selected from Mn and Cr: 1% to 3%, Al: 0.005% to 0.06%, Ti: 0.002% to 0.1%, Nb: 0.002% to 0.1%, O: 0.003% to 0.007%, and a balance of iron and inevitable impurities, wherein P is limited to 0.015% or less, S is limited to 0.01% or less, N is limited to 0.004% or less, the dimensional ratio of the lengths of prior austenite grains in a rolling direction to the lengths of the prior austenite grains in the sheet thickness direction is 1.3 to 2.5, the average grain size of the prior austenite grains is 6 μm or less, the microstructure includes 98% or more of martensite, and the tensile strength is 1470 MPa or more.

A manufacturing process of a hot stamped coated part comprising the following successive steps, in this order: providing a hot rolled or cold rolled steel sheet comprising a steel substrate and an aluminium-silicon alloy precoating, the precoating containing more than 50% of free aluminium and having a thickness comprised between 15 and 50 micrometers, then cutting the steel sheet to obtain a precoated steel blank, then heating the blank under non protective atmosphere up to a temperature Ti comprised between Te−10° C. and Te, Te being the eutectic or solidus temperature of the precoating, then heating the blank from the temperature Ti up to a temperature Tm comprised between 840 and 950° C. under non protective atmosphere with a heating rate V comprised between 30° C./s and 90° C./s, V being the heating rate between the temperature Ti and the temperature Tm, in order to obtain a coated heated blank, then soaking the coated heated blank at said temperature Tm for a time tm comprised between 20 s and 90 s, then hot stamping the blank in order to obtain a hot stamped coated part, then cooling said stamped part at a cooling rate in order to form a microstructure in the steel substrate comprising at least one constituent chosen among martensite or bainite.

The invention discloses a hot stamping mould with a temperature measuring system. The hot stamping mould comprises a concave mould, a convex mould, a plate support and positioning device, a mould built-in cooling system, a mould built-in temperature measuring system and an external temperature recording device, and is characterized in that: the concave mould and convex mould are provided with a molded surface corresponding to the workpiece shape respectively; cooling pipelines are staggered in the concave mould and convex mould, and connected with a water inlet and a water outlet through a diversion groove; and multiple thermocouples are pre-embedded on specific positions on the surface of the concave mould as well as on the surface and inside of the convex mould, and connected with the multi-channel temperature recording device. The hot stamping mould disclosed by the invention realizes full-period temperature monitoring, can directly judge and predict the product quality according to a temperature curve so as to eliminate unqualified products immediately, shortens the inspection cycle and lowers the production cost.

The invention provides a heat treatment method for high-strength and toughness hot-formed steel plates for automobiles, which belongs to the technical field of high-strength steels for automobiles, and aims to solve the problems of high strength but poor plasticity of steel plates for hot-formation at present. Technical measures to solve the problem: the mass percentage of the components is: C: 0.2~0.4%, Si: 0.1-0.5%, Mn: 1.0~2.0%, Cr: 0.1~0.5%, B: 0.001-0.005%, Ti : 0.01~0.05%, Al: 0.01-0.1%, P: <0.02%, S: <0.01%, N: <0.01%, and the balance is iron and unavoidable impurities. In the range of ~500℃, tempering treatment is carried out for 1-5min. The invention has the advantages that after the tempering treatment, the plasticity of the hot-formed steel is significantly improved while the strength is slightly reduced, and the toughness of the steel plate after hot stamping is improved.

The invention provides an aqueous binding agent which has washing resistance and is used for electrochemical aluminium hot stamping, and a preparation method thereof, belonging to a binding agent composition. The aqueous binding agent comprises 40-80 parts by weight of acrylic resin emulsion (with the solid content of 40-55%), 20-40 parts by weight of acrylic resin powder and 5-20 parts by weight of ethylene-vinyl acetate copolymer (EVA) emulsion (with the solid content of 40-60%). The binding agent does not contain organic volatile component, is harmless for the human body, is an environment-friendly electrochemical aluminium hot stamping binding agent, and is especially suitable for fabric which is needed to be printed and frequently washed.

The invention discloses a processing method of a titanium alloy end socket. The invention is characterized in that a stamping component is protected by utilizing a clamping plate, a suitable ram head and a suitable lift-ring are selected, and the specified stamping temperature, the stamping speed and the stamping times are given to perform hot stamping processing to a work piece, and an inner profile and an outer profile of the product after the hot stamping is ensured to meet the requirement of subsequent processing; the hot processing is performed after the stamping. The invention mainly used for the processing of the titanium alloy end socket of the casing of a satellite tank, the end socket material processed is smooth, the shape is well, and the percent of pass is high.

The invention discloses a continuous hot stamping device and technology. The device comprises a composite die and an electric heating mechanism. The composite die is mounted on a double-action press and comprises an upper die body and a lower die body which are oppositely arranged. The upper die body comprises an upper die base, a forming male die, an edge cutting female die and a piercing male die. The lower die body comprises a lower die base, a forming female die, an ejector plate, an elastic cushion and material supporting racks. The forming female die is fixedly mounted on the lower die base. The ejector plate is arranged under the edge cutting female die. The bottom of the ejector plate is fixedly connected with the elastic cushion through an ejector rod. The material supporting racks are mounted at the two ends of the lower die base. The electric heating mechanism comprises a power source, a movable electrode, a fixed electrode and a lifting assembly. By means of the continuous hot stamping device and technology, fast heating, drawing forming, pressurizing and quenching, edge cutting and piercing can be completed continuously, production efficiency is improved, and the transportation process before a hot blank is stamped is omitted.

The invention relates to steel which is provided with ultra-fine grains and used for hot stamping forming, a manufacturing process of the steel, a hot stamping forming process and a hot stamping forming component. The steel comprises, by weight, 0.27%-0.40% of C, 0.2%-3.0% of Mn, 0.11%-0.4% of V, 0-0.8% of Si, 0-0.5% of Al, 0-2% of Cr, 0-0.15% of Ti, 0-0.15% of Nb, 0-0.004% of B, less than 2% of the total content of Mo, Ni, Cu and other alloy elements beneficial to improve the hardenability of the steel and other impurity elements.

Coated steel having a well defined and uniform thickness is useful and advantageous for preparing products by hot stamping. Products prepared by hot stamping such a steel are particularly advantageous when subjected to a subsequent spot welding step.

Disclosed is a heating furnace system for hot stamping. A first heating furnace has a plurality of pairs of upper and lower rolls arranged in a lengthwise direction thereof in order to transfer a steel plate, and high-frequency coils alternately arranged with the pairs of upper and lower rolls in the lengthwise direction thereof. A second heating furnace continuously transfers the steel plate from the first heating furnace during heating the steel plate at temperature of A_c3 or more, and has a plurality of transfer rollers arranged in a lengthwise direction thereof. The second heating furnace includes an electric furnace or a gas furnace. This heating furnace system can reduce space required for facilities by 50% or more compared to the related art.

The invention discloses a method for manufacturing an end socket of a voltage stabilizer for nuclear power. The integral end socket is subjected to hot stamping deep drawing by a 16MND5 low-alloy steel plate, and is subjected to heat treatment of normalizing and tempering to form the end socket, which is reliable in quality, accurate in size and high in mechanical property, of the voltage stabilizer for nuclear power. In the method, the weight of the end socket manufactured by the low-alloy steel plate can be reduced by about half compared with that of the end socket manufactured by forging piece materials, the manufacturing period is short and the cost is reduced greatly.

The invention discloses a manufacturing method of a steel hot-stamped product with an aluminum or aluminum alloy plating layer. The manufacturing method comprises the following steps: 1) blanking: a steel plate with the aluminum or aluminum alloy plating layer is machined to a part blank with a needed shape by a blanking or laser cutting method; and the thickness of the steel plate with the plating layer is not more than 2.8 mm; 2) blank heat treatment: the blank is put in a heating furnace for heating and insulation; the temperature of the heating furnace is 900-950 DEG C; the atmosphere in the heating furnace guarantees the oxygen content to be more than 15%; and the total stop time of the blank in the heating furnace is 2.5-10 minutes; 3) blank transmission: the heated blank is quickly conveyed into a mold for punching; the conveying time is 4-12 seconds; and the temperature of the blank before punching is 680-750 DEG C; and 4) blank hot stamping: the heated blank is directly punched in the mold; the mold is cooled in the punching process; and the surface temperature of the mold before punching is lower than 100 DEG C.

The invention provides a hot stamping and warm blanking composite forming technology and mould for ultrahigh-strength steel. By means of the composite mould, blanking is composited in a hot stamping process, and trimming and punching are performed on sheet metal at a temperature higher than a martensite formation temperature. The hot stamping and warm blanking composite forming technology comprises the following processes of putting the sheet metal of the ultrahigh-strength steel heated to achieve complete austenitizing into the composite mould, performing stamping forming and then performing cooling and quenching; heating sheet metal needing blanking locally, keeping a warm state, performing warm blanking after completion of forming, and performing cooling further in a pressure maintaining mode. The hot stamping and warm blanking composite forming technology and mould for ultrahigh-strength steel effectively solves the problems of poor quality, low precision, high cost and long period of holes trimmed and punched in the later period of the ultrahigh-strength steel and has great practical significance in production practice.

The invention relates to the technology of laser holography anti-counterfeiting hot stamping, in particular to a preparation method for laser hot stamping foil of a metal coin and prepared laser hot stamping foil by using the method, and provides a preparation method for laser hot stamping foil of a metal coin and prepared laser hot stamping foil by using the method, which can adapt to gold stamping on the surface of the metal coin, enrich patterns on the surface of the metal coin, has an anti-counterfeiting function and is suitable for printing after stamping. The preparation method comprises the steps that a metallic nickel plate is manufactured, and a release layer, an imaging layer, a mold pressing layer, an aluminum coated layer and an adhesive layer are coated on a basement membrane strip, so that the metal coin has a brand-new effect, the operation process is simple and rapid, reproducibility of texts is good, large-scale production and durability are realized, the cost is reduced, the adhesion of the laser hot stamping foil is high, after being fastened on the surface of a metal product, the hot stamping foil does not easily fall off and has a smooth surface, through changing the formula of the adhesive layer and coating the adhesive layer for multiple times, a multi-layer bonding layer is formed, so that texts are firmly adhered on the surface of the metal, and wear resistance and weather fastness are realized.

The invention provides an electrochemical aluminum hot stamping adhesive agent, belonging to chemical compositions. The electrochemical aluminum hot stamping adhesive agent comprises (a) 0.3-6 parts by weight of thermoplastic acrylic resin, (b) 15-40 parts by weight of elastic vinyl resin; (c) 5-10 parts by weight of adhesion promoter; and (d) 35-70 parts by weight of solvent. The invention further provides a preparation method of the electrochemical aluminum hot stamping adhesive agent resistant to water washing. The adhesive agent prepared by the invention is particularly suitable for the electrochemical hot stamping of fabrics, the fabrics provided with patterns by hot stamping are extremely resistant to the water washing, the patterns can be washed for 100 min with water at 60 DEG C without falling off, and the adhesive agent has the advantages of simple preparation process, easily obtained raw materials, low cost, low hot stamping temperature and the like.

A method is disclosed of forming on a moving surface an auxiliary antenna for an RFID tag. The method includes the steps of providing a webstock of polymeric material including a conductive film, conveying the webstock with the moving surface, and applying the conductive film to the moving surface in a shape corresponding to the auxiliary antenna. The moving surface may include cardboard in a roll manufacturing process. Depending on the thickness of the auxiliary antenna the step of applying the conductive film may include cold or hot stamping. Apparatus for forming an auxiliary antenna for an RFID tag is also disclosed.

The invention discloses a cooling system used for an ultra-high strength steel plate thermal die cutting and forming die. The die comprises a concave die and a concave die seat; a water chamber is arranged between the concave die and the concave die seat; the water chamber is communicated with a water inlet and a water outlet. The water chamber is arranged between the concave die and the concave die seat of the invention; after cooled water is inlet in the water chamber, a steel plate workpiece can be quickly cooled by the thermal conduction between the die and the steel plate so as to meet the quenching condition of the steel plate. Especially, the water chamber is also internally provided with a supporting column; the upper end of the supporting column is contacted with the lower bottom surface of the concave die; the lower end of the supporting column is contacted with the upper bottom surface of the concave die seat; therefore, the structural strength of the concave die is ensured, the flowing direction of the water flow can be guided, flow perturbation conditions can be provided, meanwhile, the heat transfer area is increased, and the heat exchange efficiency between the cooled water and the die is improved.

A system for forming a plurality of hot stamped steel parts for automotive applications includes a furnace with a stack of sealed chambers, each containing an individual heater, for simultaneously heating a plurality of blanks. Each chamber is removable from the furnace, so that if the heater contained therein malfunctions, the heater can be repaired while the other chambers continue to heat the blanks. Each chamber also comprises a shelf including a plurality of driven rollers for conveying the blanks through the furnace. A blank feeder also including a plurality of driven rollers extends continuously from the furnace to a hot forming apparatus. The hot forming apparatus includes a plurality of cavities for shaping one or more of the blanks into a plurality of the parts.

The invention discloses a method for machining high-strength steel hot stamping formed parts. The main principle of the machining method is that partial tempering or annealing processing is carried out on the hot stamping formed parts with the uniform performance, gradient changes of the tempering or annealing temperature are achieved through heat conduction of a board, gradient changes of the performance are achieved, and the partial trimming and hole punching performance and the impact performance of the parts are improved on the premise that the high strength is kept on other portions. The method includes the implementation steps of according to three-dimensional structures of a trimming and hole punching region and an impact energy absorption region, designing corresponding high-frequency induction heating coils, partially tempering or annealing the trimming and hole punching region and the impact energy absorption region to enable the trimming and hole punching region and the impact energy absorption region to be at certain temperature, achieving the gradient changes of the tempering or annealing temperature, carrying out air cooling on the partially-tempered or partially-annealed parts to enable the partially-tempered or partially-annealed parts to be at certain temperature, and finally and rapidly moving the air-cooled hot stamping formed parts to a trimming and hole punching mold to carry out mold trimming and hole punching.

The present invention relates to magnesium alloy preparation technique, in the concrete, it is a processing method of magnesium alloy plate material and its special-purpose hot stamping equipment. Said invention adopts plate stamping technology to form magnesium alloy shell moulded component, and includes the following steps: preheating mould to 200-500 deg.C, heating magnesium alloy plate material to 200-350 deg.C, applying lubricant on plate material and placing said plate material into the mould, controlling drawing ratio in the range of 1.5-3, and its drawing speed is 50-80 mm/min. Said invention can improve the workability of the material, can raise product quality and can raise production efficiency.

The invention relates to a hot stamping die of an integrated cooling pipeline, belonging to the field of hot stamping and molding. The die comprises the following main parts: a concave die, a convex die, a cooling supporting block of the concave die and the convex die, and the like. By utilizing a water flow cooling mode, the hot stamping die avoids that the flow rate of cooling water close to a straight cooling pipeline has obvious difference from the flow rate of cooling water of a further part by a method that two-stage water flow buffering is adopted at a water inlet. A series of natural shape cooling water channels are formed in the hot stamping die by combining the shape of a molding piece, and the purposes of cooling and quenching of the molding piece are achieved through the direct heat exchange of the cooling water and the die so as to guarantee the uniform structure and the molding quality of the molding piece. The invention can solve the problem that a large-size complicated hog stamping die needs to be segmented during drilling and cooling at present so as to effectively solve the problem of difficult cooling of the hot stamping die at present. The cooling supporting block of the concave die and the convex die is made of non-die steel, and the die cost and the requirement on the die material of the molding piece are reduced through rust-proof treatment.

A hot stamped high strength part in which the propagation of cracks which form at the plating layer at the time of hot stamping when hot stamping aluminum plated steel sheet is suppressed and the post painting anticorrosion property is excellent even without adding special ingredient elements which suppress formation of cracks in an aluminum plating layer is provided.

A hot stamped high strength part which is excellent in post painting anticorrosion property, which hot stamped high strength part has an alloy plating layer which includes an Al—Fe intermetallic compound phase on the surface of the steel sheet, wherein the alloy plating layer is comprised from phases of a plurality of intermetallic compounds, a mean linear intercept length of crystal grains of a phase containing Al: 40 to 65 mass % among the phases of the plurality of intermetallic compounds is 3 to 20 μm, an average value of thickness of the Al—Fe alloy plating layer is 10 to 50 μm, and a ratio of the average value of thickness to the standard deviation of thickness of the Al—Fe alloy plating layer satisfies the following relationship:

0<standard deviation of thickness/average value of thickness≦0.15.

The invention discloses a manufacturing technology of a chipless radio frequency identification (RFID) radio frequency tag. According to the invention, a vacuum evaporation method or a cold and hot stamping process is used to manufacture the chipless RFID radio frequency tag. A technology process comprises the following steps: according to a requirement, designing an antenna structure of the chipless RFID radio frequency tag; then taking PVC, PP, PET, paper, a plastic and the like as a base material; using the vacuum evaporation method or the cold and hot stamping process to transfer a conductive metal to a surface of the base material; finally carrying out film coating and packaging so as to obtain the chipless RFID radio frequency tag. The chipless RFID radio frequency tag manufactured by using the above process possesses excellent folding resistance and good toughness. And the tag possesses the following advantages that manufacturing cost is low; an operation technology is simple and easy to operate and so on. A wide application prospect is possessed.