704results about How to "Reduce deformation resistance" patented technology

The invention belongs to the technical field of materials, and specifically relates to a nano-carbon-reinforced wear-resistant composite material. The nano-carbon-reinforced wear-resistant composite material comprises the following components in percentage by mass: 55-99% of metal powder, 0.1-35% of ceramic powder, and 0.01-15% of nano-carbon, wherein the metal powder is used as a composite material matrix; the ceramic powder is used as a wear-resistant filling material; and the nano-carbon comprises single-wall carbon nano-tubes, multi-wall carbon nano-tubes and other materials, and is mainly used for improving the heat-conducting performance, strength, toughness, wear resistance and other performances of the composite material. The wear-resistant composite material disclosed by the invention can keep a stable friction coefficient and a low wear rate under the conditions of a heavy load, a high speed, and long-time braking.

The present invention relates to propping agent which is widely applied to the oil and gas well hydraulic fracturing technology, and the present invention especially relates to a manufacturing method and a preparation technology of low-consistency propping agent and is characterized in that firstly, plant fibre material is used as the raw material and is crushed and grinded as plant fibre granules; secondly, modifying agent solution dips and solidifies the plant fibre granules; thirdly, macromolecular resin is used to covering the granules which are crushed and filtered again to form the propping agent. The propping agent prepared by the technology and method can conquers that the prior propping agent has large energy consumption and high expense of the whole construction, or the propping agent of the present invention does not easily cause the phenomena of propping agent disgorging or crack emptying.

The invention discloses a production process for rolling a light gauge aluminum foil, which comprises the following steps of: performing rough rolling, wherein the reduction per pass of the rough rolling is 0.3mm to 0.14mm to 0.07mm to 0.038mm; performing intermediate rolling, wherein the reduction per pass of the intermediate rolling is 0.038mm to 0.013mm; performing double rolling; performing intermediate annealing; cleaning a stock, namely performing surface cleaning on the aluminum foil stock by using rolling oil at a finish rolling inlet; performing finish rolling, wherein the reduction per pass of the finish rolling is 0.013mm to 0.005mm; slitting; annealing a semi-finished product; and packaging and warehousing. By adding the intermediate annealing and rolling oil cleaning processes for the aluminum foil, the mechanical property of the aluminum foil is improved while the thickness of the aluminum foil is reduced, and the breakage condition and a pinhole number in the rolling process are reduced.

The invention relates to a method for rolling a difficult-to-machine metal material by combining electro-plasticity with temperature plasticity. The method comprises the following steps of: preheating a roller to the recovery temperature of a machined metal material and lower than the recrystallization temperature of the metal material; and inputting high-energy pulse current into a machining section of the moving metal material, performing electro-plastic treatment under the actions of the thermal effect and non-thermal effect of the metal material, and feeding the machining section into the preheated roller for rolling by combining electro-plasticity with temperature plasticity. In the rolling process, electro-plasticity and temperature plasticity are combined and unbalanced kinetic energy produced by the material due to the rise of atomic potential energy and strong electric stimulation of pulse current under heating condition is fully utilized, so that movement of crystal defects such as diffusion, dislocation and the like of atoms is facilitated, the internal microstructure of the metal material is improved, a tissue which is beneficial to enhancing of intensity and toughness (plasticity) is formed, and the plasticity of the material at low temperature is enhanced. The method is suitable for rolling difficult-to-machine metal materials such as magnesium alloys, nickel-titanium alloys, tungsten alloys and the like.

The invention relates to a machining method of a high-quality large-diameter thin-wall barrel body. The machining method comprises the following steps. Firstly, isothermy or hot die anti-extrusion technology is utilized, and anti-extrusion is performed on an alloy forging rod. Secondly, machining is performed on the inner and outer surfaces of a spinning barrel billet, and finish turning is performed on the inner surface of the barrel bottom of the barrel billet. Thirdly, multi-pass brute force thinning spinning is performed on the machined spinning barrel billet, and the spinning is hot spinning or cold spinning. Fourthly, intermediate heat treatment is performed on a spinning semi-finished product, and the intermediate heat treatment is annealing or solution treatment. Fifthly, the third step and the fourth step are performed repeatedly and alternatively so that finished product spinning is performed. Sixthly, scouring and cleaning are performed on the barrel body, and finished product heat treatment is performed. Seventhly, polishing of the inner and outer surfaces of the barrel body after heat treatment in the sixth step is performed, and a finished product barrel body is obtained. By adoption of the machining method of the high-quality large-diameter thin-wall barrel body to machine a large-diameter thin-wall metal barrel body without welding lines, organization is even and fine, comprehensive performance is high, the process is short, product additional values are high, and good application and popularizing prospects and certain economic and social benefits are achieved.

The invention relates to a preparation method of a heavy-calibre nickel base alloy thin-walled tubular product, which comprises the steps of: 1, preparing a nickel base alloy tube blank by adopting a thermal backward extrusion process, wherein the extrusion temperature is 1000-1250 DEG C, the worker die preheating temperature is 450-550 DEG C, the extrusion speed is 25mm/s-60mm/s; 2, thinning through cold spinning with strong force, wherein the first pass of thinning rate is 20-75 percent, other passes of thinning rates are 25-30 percent, the deformation during thermal treatment (annealing or solution treatment) is 50-75 percent, the feeding ratio of two passes before a finished product is obtained is 0.5mm/n-0.7mm/n, and feeding ratios of other passes are 0.8mm/n-1.5mm/n; and 3, carrying out thermal treatment (annealing or solution treatment) on a semi-finished product or finished product, scouring and cleaning. The heavy-calibre nickel base alloy thin-walled tubular product processed by adopting the invention has the advantages of high material utilization rate, low cost and high additional value, is suitable for massive production, and has remarkable economic benefit and social benefit.

The invention provides a chambering -forging forming method for an aluminum alloy hub with a complex structure and a die thereof. The forming method comprises the steps of: preparing for materials; heating blanks; upsetting; mould-pressing and chambering a rim. The die for realizing the chambering-forging forming method for the aluminum alloy hub with the complex structure comprises a forging die and a rim-chambering die, wherein an upper die of the forging die consists of an upper die body and an upper die core which are sequentially nested and mounted, a lower die consists of a lower die body, a lower die core and an ejector rod which are sequentially nested and mounted; and the bottom and the side wall of the assembling part of the lower die core and the lower die body are uniformly provided with 4-8 R3 penetrating exhaust grooves, the rim-chambering die consists of an upper chambering die and a lower chambering die, and the size of a cavity of the upper chambering die is same as the size of the cavity of the upper die core of the forging die. The invention realizes once-heating forming; a non-burr forging and rim-chambering forming process is adopted, thus two trimming procedures are eliminated, material utilization rate is improved, and number of equipment is reduced; and the rim-chambering die has a simple structure and is convenient for operation.

The invention relates to a hot-rolling production method for low-nickel austenitic stainless steel coils, which is specially used for rolling low-nickel austenitic stainless steel coil products with the thicknesses of 2.5-16mm. The technological process comprises grinding, heating, high pressure water dephosphorization, rough rolling, finish rolling, laminar cooling and coiling. The steel coils are made of low-nickel austenitic stainless steel that comprises the following components in percentage by mass: less than or equal to 0.15 percent of C, 8-11 percent of Mn, less than or equal to 0.045 percent of P, less than or equal to 0.03 percent of S, less than or equal to 1.0 percent of Si, 13-17 percent of Cr, 1.0-2.0 percent of Ni, less than or equal to 0.8 percent of Mo, 0.1-0.20 percent of N, 0.5-1.5 percent of Cu and the balance of Fe. The hot-rolling production method can be used for producing low-nickel austenitic stainless steel coils without the defects of edge crack and surface crack, and the yield of the low-nickel austenitic stainless steel coils is increased.

The invention relates to a production method of 3003-brand cathode aluminum foil, which includes the following steps: a. raw materials are refined and rolled into a blank with the thickness of 6.5 mm to 8.5 mm; b. the blank obtained in step a is rolled into the blank with the thickness of 3.5 mm to 4.3 mm in a cooling mode to be uniformly annealed; c. the uniformly-annealed blank is rolled into the blank with the thickness of 0.3 mm to 0.5 mm in a cooling mode to be recrystallized and annealed; and d. the recrystallized-and-annealed blank is rolled into the 3003-brand cathode aluminum foil with the required thickness. The method of the invention enables the cost to be lower and the product quality to be better, the specific capacitance of the product is increased to be higher than 530 microfarads /cm<2>, and the highest specific capacitance can be 560 microfarads /cm<2>. The invention greatly improves the product competitive strength, reduces the disparity with abroad products, and makes a contribution for the trade progress.

The invention discloses a method for manufacturing large cake forgings of high-carbon and high-chromium cold working die steel. The method is characterized by comprising the following steps of: obtaining Cr12MoV or Cr12Mo1V1 steel by adopting primary smelting with an electric furnace, ladle refining and vacuum degassing process smelting; pouring the tapped steel to form a 6 to 9t octangular ingot; conveying the octangular ingot to a press at the temperature of more than or equal to 300 DEG C, forging the octangular ingot to a blank with the diameter of 300 to 700 millimeters, removing surface defects by annealing, polishing or turning and local grinding, performing cold saw cutting on the end face and blanking to form a cake blank; and heating the cake blank to the temperature of between 1,150 and 1,190 DEG C, upsetting and forging the cake blank by using the press, annealing and turning, and thus obtaining the large cake forgings of the high-carbon and high-chromium cold working die steel. By adopting the method, the yield is improved to 40 to 60 percent; and the manufactured large cake forgings of the high-carbon and high-chromium cold working die steel can comprehensively meet the requirements of hardness, impact toughness and the like and ultrasonic flaw detection quality.

The invention discloses a chipless forming method for a gear stick and a section gear through hot extrusion by utilizing an alloy steel horizontal type backward extruder, solving the problems that the existing gear cutting process has more working procedures, low efficiency, large metal loss, more operators for machine tool processing and high production cost and the like by utilizing the chip processes of lathing, milling, drilling, inserting and grinding. The method comprises the following steps: an inner cooling combined type double-conical surface gear squeezing die, a recipient and a floating pecker combined mandril are adopted by taking the producing principle of alloy steel thick wall special seamless steel tubes as an example; scale-free heating is rapidly carried out on the blank; lubricating warm-extrusion molding is carried out; center punching, shaft hole slotting and tooth surface extrusion are finished at a time; and the finished product of the gear stick is directly produced, then is subject to waste heat annealing, slicing by wire-electrode cutting and heating process to be manufactured into a finished product. Compared with a chip gear-cutting molding method, the invention has simplified working procedure, few labor, high efficiency, less metal loss, high gear strengthen and reduces the production cost, and then tooth surface precision reaches the standard. The method of the invention is a significant technological innovation of straight tooth and oblique tooth cylindrical gear process technologies.

The invention discloses a manufacturing process of a forging stock of a steel forging piece for oil extracting equipment in a deep sea, which comprises the following steps of: with martensite precipitation hardening type stainless steel as a steel forging piece material, selecting a square ingot, heating to 1180DEG C, cogging along the length direction of the steel ingot to obtain an octagonal section steel billet, wherein the forging ratio is 2.0-2.2; heating the octagonal section steel billet to 1040DEG C and preserving heat for 360 minutes; carrying out oil cooling below 32DEG C; taking an intermediate section as a billet; axially upsetting the billet from the initial forging temperature of 1150DEG C to the final forging temperature of 990DEG C; when the billet is upset to half of the height of the original billet, drawing out the octagonal section of the upset billet according to the original axial direction; axially upsetting when the billet is drawn to the length of the original billet; when the billet is upset to half of the height of the original billet, drawing out the octagonal section of the upset billet according to the original axial direction; when axially forging and shaping the billet when the billet is upset to half of the height of the original billet, enabling the total forging ratio to be 5.5 and obtaining a rectangular forging piece; and air cooling to be 340-360DEG C, carrying out furnace insulating for 120 minutes and then carrying out furnace cooling to the room temperature.

The invention discloses a flexible stretch-forming device and a method for carrying out stretch-forming on a plate by utilizing the flexible stretch-forming device and solves the technical problem that the stretch-forming accuracy of a flexible stretch-forming device for the molded surface of a reconfigurable unidirectional continuous die is low. The technical scheme includes that the flexible stretch-forming device comprises an industrial manipulator, a heating forming head, a power supply, a multipoint die, a nail post and a polyurethane elastic cushion. The nail post is mounted on the base of the multipoint die, the polyurethane elastic cushion is positioned above the nail post, the lower surface of the polyurethane elastic cushion is attached to the discrete surface formed by the nail head of the nail post, the plate is positioned above the polyurethane elastic cushion, the lower surface of the plate is attached to the upper surface of the polyurethane elastic cushion, the heating forming head is positioned above the plate, and the spherical head surface of the heating forming head is contacted with the upper surface of the plate. According to the flexible stretch-forming device and the method for carrying out stretch-forming on the plate by utilizing the flexible stretch-forming device, the electromagnetic induction heating forming head is adopted to locally heat the plate in the stretch-forming process, the local heat effect of the region can reduce the deformation resistance of the plate, the plasticity is improved, the resilience value is reduced, and the forming accuracy of the plate is improved.

The invention belongs to the technical field of preparation of aluminum alloy sections, and relates to a wide-range thin-wall series-6 aluminum alloy section for a high speed train and a preparation method of the wide-range thin-wall series-6 aluminum alloy section. Aluminum alloy comprises the following elements in percentages by weight: 0.50-0.65% of Si, less than or equal to 0.25% of Fe, less than or equal to 0.10% of Cu, 0.03-0.15% of Mn, 0.45-0.55% of Mg, less than or equal to 0.05% of Cr, less than or equal to 0.05% of Zn, less than or equal to 0.10% of Ti, less than or equal to 0.05% ofa single impurity, less than or equal to 0.15% of total impurities and the balance of Al. Deformation resistance and friction resistance in an extruding process are reduced by reasonably controllingthe temperature relationship of an ingot casting, an extrusion barrel and a die, the extruding speed is increased to be 8-13 m/min, the quenching temperature of the product is ensured, thus, any coarse grain rings are not generated when a thin-walled apron board is extruded at high speed, after being subjected to on-line quenching, the product is directly subjected to artificial ageing at the temperature of 175+/- 5 DEG C for 4-8 hours, the mechanical property of the product can meet requirements in TB/T.3260.4-2011 TO 1.2 mm thin-walled sections, the actual tensile strength reaches 250-270 MPa, the yield strength reaches 210-230 MPa, the specific elongation is 8-10%, and the grade of the grain size of an aluminum section microscopic structure reaches and even exceeds 4.

The invention provides a preparation method for a TiAl alloy plate of a uniform structure and relates to the preparation method for the TiAl alloy plate. The preparation method for the TiAl alloy plate of the uniform structure aims at solving the problems that the structure of an existing TiAl alloy plate is nonuniform, and the comprehensive performance is reduced. The preparation method comprises the steps that 1, blank preparing is conducted to obtain a cuboid TiAl alloy rolling blank; 2, sleeving is conducted to obtain a sleeved TiAl alloy blank; 3, double-step heat treatment is conducted before high-temperature rolling to obtain a TiAl alloy blank subjected to double-step heat treatment; 4, high-temperature rolling and heat preserving during passes are conducted to obtain a TiAl alloy plate subjected to high-temperature rolling; 5, stress relief annealing is conducted to obtain an annealed TiAl alloy plate; and 6, a sleeve is removed through machining, so that the TiAl alloy plate is obtained. The preparation method for the TiAl alloy plate of the uniform structure has the advantage that the TiAl alloy plate of the uniform structure is obtained by adopting double-step heat treatment before rolling. The preparation method is mainly used for preparing the TiAl alloy plate of the uniform structure.

The invention discloses a novel laser indirect impact micro-forming device and method. The device and method are mainly applied to plastic forming technique and manufacturing of fine micro parts. The device and method solve the problem that a conventional laser impact micro-forming method is difficult in forming, and materials cannot be formed. The device comprises a mold-debug light spot centering assembly, a workpiece positioning assembly, a workpiece assembly, an Nd:YAG pulsed laser system used for impact forming, a CW optical fiber laser system used for heating, an ultrasonic vibration system and a control system. The device can achieve the aim that pulsed laser impact force is adopted to serve as an energy source, meanwhile, ultrasonic vibration is applied to a mold and a workpiece, or, a laser beam sent out by a CW optical fiber laser is used for carrying out non-contact type quasi-static heating on the surface of the workpiece, or, under the joint effect, workpiece micro-forming is achieved; due to the design, work efficiency is improved, design is reasonable, control performance is good, quality and precision of micro-forming parts are ensured, and the device is suitable for industrialized application.

The invention relates to a severe plastic deformation technology of a magnesium alloy board. The technology comprises the following steps of: pretreating the magnesium alloy board; carrying out homogenization treatment on the magnesium alloy board; carrying out surface finishing on the magnesium alloy board; cleaning the magnesium alloy board; preheating the magnesium alloy board; carrying out pack rolling deformation on the magnesium alloy board; putting the magnesium alloy board into a rolling mill, and carrying out asynchronous pack rolling deformation on the magnesium alloy board; and carrying out annealing treatment on the magnesium alloy board. The magnesium alloy board processed by the technology has the advantages of being simple in technology, high in production efficiency, good in mechanical property and good in product quality.

The continuously casting and head-less rolling process for moderately thick plate includes the following steps: continuously casting plate blank, depressing liquid core, high temperature rolling, end cutting with flying shear, steam water cooling, finish rolling, sectional shearing, laminated cooling, cold bed or ground winding, finishing and warehousing. The present invention has raised metal yield, lowered fuel and power consumption, low end cutting rate, less rolling gates, and high output and finished product rate.

The invention discloses a high-strength corrosion-resistant aluminum alloy profile and a preparation method thereof. The aluminum alloy profile comprises an aluminum alloy base body and a ceramic coating. The aluminum alloy base body is prepared from Cu, Si, Fe, Cr, Mg, Mn, Zn, Ti, Li, Ni, Zr, Y, W, V and the balance Al. The ceramic coating is prepared from SiC, Cr2O3, NiO, Cr3C2, Al2O3 and Si3N4. According to the high-strength corrosion-resistant aluminum alloy profile, ceramic powder is arranged on the surface of the aluminum alloy base body through plasma cladding, and then laser remelting is conducted, so that the obtained aluminum alloy profile has good mechanical performance such as strength, hardness and impact toughness; and meanwhile, the high-strength corrosion-resistant aluminum alloy profile has the beneficial effects of being resistant to corrosion, good in abrasion resistance, long in service life and the like.

The invention provides a production method of a tantalum target and a tantalum target component. The production method of a tantalum target comprises the following steps of providing a tantalum ingot; forging the tantalum ingot to form a first tantalum target blank; rolling the first tantalum target blank to form a second tantalum target blank; performing first heat treatment on the second tantalum target blank to form the tantalum target, wherein the first heat treatment is divided into three stages: the temperature of the first stage of heat treatment is 550-750 DEG C, and the temperature is maintained for 30-90 minutes; the temperature of the second stage of heat treatment is 750-950 DEG C, and the temperature is maintained for 30-90 minutes; the temperature of the third stage of heat treatment is 950-1,200 DEG C, and the temperature is maintained for 30-90 minutes. By adopting the technical scheme, the main crystal orientation of the obtained tantalum target is (100), and the crystal orientation on the cross section is uniform; moreover, the tantalum target with fine grain and uniform internal organization also can be obtained.

The invention relates to a formation method of a long pipe-shaped part with partial embossment and solves the problems of poor strength and stiffness, complex processes and high cost due to the adoption of a present production method that a pipe with partial embossment is first formed and then assembled and welded into a long pipe-shaped part with partial embossment. The method of the invention is that: firstly, both ends of a pipe (1) are sealed by a sealing device (2); secondly, a small-sized mold is designed according to the shape of the partial embossment; thirdly, a heating device (6) is used for heating the mold; fourthly, the pipe (1) is injected with high-pressure liquid or high-pressure gas through a channel (7) on the sealing device (2); fifthly, when the pipe inside a mold cavity of the mold is completely deformed and matched with the mold cavity, the long pipe-shaped part with partial embossment is then obtained. The invention is characterized by small size of the mold, equipment table and tonnage. Compared with the traditional formation method, the part produced by the method has the advantages of low cost, good overall performance and surface quality.