273 results about "Metal flow" patented technology

The invention relates to a free forging method for preparing an AAA nondestructive inspection grade large-specification TC4 alloy bar, and belongs to the technical field of titanium alloy hot working. According to the method, as-cast grains are fully crushed and refined through high-temperature and large-deformation forging in the cogging stage; high-low-high heating forging at the lower phase transformation point and the upper phase transformation point is used for promoting the high-temperature dynamic recrystallization process so as to homogenize crystal grains; the corner deformation dead zone is fully reduced through multi-heating-number diagonal drawing-out forging, and a U-shaped anvil is adopted in the forming stage to reduce metal flowing in all directions in the rolling stage. According to the free forging method for the large-specification TC4 alloy bar, the structure uniformity of the TC4 alloy bar can be improved, and the AAA-level nondestructive testing requirement is met.

The invention discloses a thin-wall multi-fin part integrated forming device and process, the thin-wall multi-fin part integrated forming device comprises a die holder, a lower die is arranged at the top of the die holder, a shape control die is embedded in the top end of the lower die, and an upper die is arranged at the top ends of the lower die and the shape control die; the power output end of the upper pressing mechanism is fixedly connected with a shape filling mold which is movably inserted into the lower mold, and the power output end of the secondary upper pressing mechanism is fixedly connected with an ejector rod which is movably inserted into the shape filling mold; the power output end of the downward pressing mechanism is fixedly connected with a male die movably inserted into the upper die, and the power output end of the secondary downward pressing mechanism is fixedly connected with a hole forming rod movably inserted into the male die. The integrated forming process of the whole forming process of local heating, upsetting, necking and back upsetting of a blank and overall forming, hole forming, cooling and demolding of a formed part can be achieved, the complete metal flow line of the thin-wall multi-fin part is kept, and local strengthening and efficient near-net forming of a fin area are achieved.

The invention provides a wire harness crimping quality intelligent detection and self-adaptive control method and system, and the method comprises the steps: calculating a stress distribution value of a crimping point through the obtained internal metal flow distribution characteristics in combination with a mechanical strength simulation algorithm, and obtaining a mechanical strength evaluation index; if the mechanical strength evaluation index is lower than a preset threshold value, triggering an alarm signal, extracting deviation type data from the alarm signal, and judging a quality judgment result; generating a feedback control instruction according to the judged quality judgment result, transmitting the feedback control instruction to crimping equipment to adjust crimping force parameters, and obtaining optimized crimping process data; updating a real-time monitoring database by adopting the obtained optimized crimping process data, and determining a geometric parameter reference value of a subsequent crimping batch; and matching the determined geometric parameter reference value with a vehicle safety requirement to obtain a final quality verification report.

The invention provides a defect prediction and quality control method for high-strength aluminum alloy welding based on numerical simulation. The defect prediction and quality control method comprises the steps that a welding process finite element model is established according to the actual situation; inputting accurate heat source parameters, simulating a molten pool flow field, and revealing an influence rule of metal flow in the micro molten pool on formation of micro defects through visual simulation; phase field simulation and stress distribution simulation are conducted on the solidification behavior of the molten pool, the grain structure condition of a weld zone is obtained, and crack tendencies under different processes are evaluated in combination with stress distribution; post-welding deformation of the whole component is simulated, stress deformation of a key part is obtained, and post-welding deformation is inhibited by means of reversible deformation, pre-pressing and the like. The method belongs to the field of welding numerical simulation, and can help to adjust the welding process, reduce the crack occurrence rate during welding of the high-strength aluminum alloy and inhibit post-welding deformation.

The invention discloses a steel structure butt welding adjusting device and method, and belongs to the technical field of steel structure butt welding. A steel structure butt welding adjusting device comprises a first inserting pipe and a second inserting pipe corresponding to the first inserting pipe, fixing rings are fixedly installed on the surfaces of the corresponding ends of the first inserting pipe and the second inserting pipe, rotating grooves are formed in the outer surfaces of the two fixing rings, and rotating blocks matched with the rotating grooves are slidably connected into the rotating grooves. Compared with a traditional welding device, in the clamping and fixing process of two steel pipes, the clamping plates synchronously move to clamp and fix the steel pipes to the center line positions of the first insertion pipe and the second insertion pipe, alignment of the steel pipes before welding is guaranteed, the welding head rotates to surround the to-be-welded positions of the steel pipes for one-time welding, and the welding efficiency is improved. The centrifugal force generated by rotation of the steel pipe is prevented from affecting metal flowing of a welding pool, the steel pipe welding speed of the welding device is increased, and the steel pipe welding quality of the welding device is improved.

The present invention discloses a fuel cell visualization test device, which belongs to the field of fuel cell technology. The present invention includes a transparent end plate with a boss structure and a metal flow field plate with a hollow flow channel structure. The boss structure of the transparent end plate and the hollow flow channel structure of the metal flow field plate are combined to form a visualized fuel cell end plate and flow field structure; the surface of the transparent end plate is processed with a boss structure, and the introduction of the boss structure can effectively block the mutual flow of water between different flow channels, and can truly and accurately reflect the water distribution of the fuel cell. The present invention has the advantages of simple processing and manufacturing, low cost, high test accuracy, and high safety. It can display the water distribution and flow conditions of the fuel cell flow channel and MEA surface in real time online, and it can be extended to fuel cells with various flow field shapes and various active areas, and has good versatility.

The utility model discloses an extrusion die for an asymmetric-section 2195 aluminum-lithium alloy section for aerospace. The extrusion die is provided with a pre-deformation cavity, a flow guide cavity and a working belt, wherein the pre-deformation cavity is used for preliminarily deforming a blank towards the section of the section; the flow guide cavity is used for adjusting metal flow in different areas; the pre-deformation cavity and the flow guide cavity are arranged in a stepped mode in the direction of the working belt, the cavity walls of the flow guide cavity are provided with different offsets and flow guide inclination angles according to the section characteristics of the sectional materials and the flowing characteristics of metal, the purpose of directly extruding the straight sectional materials can be achieved through the working belt arranged in a two-stage mode, the product has good perpendicularity, the appropriate section size is obtained, and the production efficiency is improved. And the twisting defect is reduced.

This invention provides a thickness control method for a single-stand reversible cold rolling mill. The single-stand reversible cold rolling mill unit includes an inlet coiler, an outlet coiler, a mill body, a mill hydraulic system, an inlet thickness gauge, an outlet thickness gauge, an inlet speed gauge, an outlet speed gauge, an inlet tension gauge, and an outlet tension gauge. The single-stand reversible cold rolling mill unit also includes an S-roll, with S-rolls at both the inlet and outlet of the unit. The S-roll can rotate 180°, with the upper roll of the S-roll able to rotate to the lower roll position and the lower roll of the S-roll able to rotate to the upper roll position. The 180° rotation causes the strip steel to wind in an S-shape on the S-roll. The thickness difference of the strip steel is eliminated by adjusting the speed of the inlet S-roll to control the metal flow rate entering the roll gap.

The invention provides a rolling forming method for a complete shape follow-up streamline raceway of a tapered roller bearing, and belongs to the field of bearing preparation. According to the size of an outer ferrule of the tapered roller bearing, a blank is designed, the size of a blanked bar and the size of the blank are determined, blanking is conducted to obtain a material section, and the height-diameter ratio of the bar is controlled to be small in the blanking process; the bar is subjected to upsetting according to the upsetting ratio to obtain an intermediate material, the upsetting ratio is controlled to be small in the upsetting process of the bar, the intermediate material is subjected to extrusion forming and stamping to obtain a blank, and the blank is punched to form a ring blank; and the ring blank is rolled through the fully-closed hole pattern to achieve rolling path streamline follow-up forming to obtain a final forge piece, and the rolling ratio is controlled to be large under the condition that a core roller can be placed in the fully-closed hole pattern. The influence of the blanking process on subsequent blank making is considered, and the bar size and the blanking diameter are designed, so that the height-diameter ratio of the bar is as small as possible, and the radial flow of bearing ring metal at the stage is reduced; and in consideration of the influence of the upsetting process on subsequent rolling metal flow, a reasonable upsetting ratio is designed, so that the upsetting ratio is as small as possible, and the adverse influence of non-uniform deformation in the forging process on metal streamline distribution is reduced.

The invention discloses steel for a bearing outer ring of a super-power wind generating set and a manufacturing process of the steel, and belongs to the technical field of wind power equipment manufacturing. The invention discloses steel for a bearing outer ring of a super-power wind generating set. The steel comprises the following components in percentage by mass: 0.48%-0.52% of C, 0.28%-0.33% of Si, 0.62%-0.66% of Mn, 0.97%-1.04% of Cr, 0.16%-0.21% of Mo, 0.005%-0.01% of Ti, 0.003%-0.008% of Zr, 0.0007%-0.001% of Ba and the balance of Fe. According to the method, alloy elements such as Ti, Zr and Ba are used for refining the sizes of grains and inclusions, meanwhile, the crushing degree and uniform distribution of the blank tissue and the inclusions are enhanced through extrusion and torsion, a fine and uniform metal flow line can be obtained after ring rolling, and the mechanical property of a forged piece is improved.

The invention provides a precision forging method for an adjustable blade of an aero-engine based on titanium alloy, which can realize precision forging forming of the blade of the titanium alloy aero-engine, enables the blade profile size of a blade forging to directly reach the size of a finished product, does not need to be machined again, is high in product percent of pass and good in air passage consistency, also can keep the continuity of a metal flow line, and is suitable for large-scale production. The mechanical property and the aerodynamic performance are high, and the surface integrity and the metallographic structure meet the design requirements. The method comprises the following steps of blanking, surface cleaning, glass lubricant spraying, heating blank making, surface cleaning, glass lubricant spraying and forging, and is characterized in that the forging procedure comprises heating upsetting, heating pre-forging and heating finish forging, and the surface cleaning and glass lubricant spraying are respectively carried out after each procedure of heating upsetting, heating pre-forging and heating finish forging.

The invention discloses intelligent forging equipment and method based on seamless steel pipe machining, and relates to the technical field of needing modification. The intelligent forging equipment comprises a titanium alloy cylindrical blank roller and a temperature control mechanism used for heating the titanium alloy cylindrical blank roller; a supporting and straightening mechanism used for conducting shaping and straightening on the titanium alloy cylindrical blank roller is arranged on one side of the interior of the temperature control mechanism, and a supporting frame is arranged on one side of the temperature control mechanism. Metal can be forced to flow through the hammering acting force of the forging hammer mechanism, small gaps and holes in the metal can be filled, air holes and shrinkage porosity in materials are reduced, the overall density of the materials is improved, potential stress concentration points are reduced, and therefore the reliability of the materials is enhanced; the titanium alloy is subjected to repeated plastic deformation, so that original coarse grains are crushed into finer grains, and grain refinement is beneficial to improving the strength and toughness of the material.

The invention provides a 60NiTi alloy high-purity preparation and rolling forming method. The 60NiTi alloy high-purity preparation and rolling forming method comprises the steps that firstly, raw material treatment is conducted, wherein the surface of a raw material is cleaned; step 2, vacuum induction suspension smelting; step 3, annealing treatment; step 4, pretreatment before rolling; fifthly, rolling forming is carried out; and sixthly, the sheath is removed, specifically, the sheath is cut off through an angle grinder, and the internal 60NiTi alloy plate is obtained. According to the method, a low-C-content high-quality cast ingot is prepared through a vacuum suspension smelting process of vacuum-pulsed magnetic field composite degassing, and a rolling forming process is adjusted according to the millisecond-level rapid precipitation characteristic of a Ni4Ti3 phase in the alloy and the metal flowing behavior in the plastic forming process; the problems that in the alloy rapid forming process, hard phase rapid precipitation and recrystallization are difficult are solved, the defects of non-uniform crystal grains, transverse cracks, longitudinal cracks and crocodile opening type cracks in the rolling process are avoided, and the 60NiTi alloy rolled plate uniform in microstructure and excellent in comprehensive performance is obtained.

A die for stamping sheet metal comprises a first portion with a convex bead, a second portion with a concave channel, at least one accelerometer positioned near the concave channel. When a sheet metal is positioned between the first portion and the second portion, the first portion and the second portion are configured to be brought together so that the convex bead mates with the concave channel to apply a blank holding force (BHF) to the sheet metal to clamp the sheet metal. The at least one accelerometer measures a time domain parameter or profile or a frequency domain parameter or profile during the placement of the sheet metal.

The invention discloses a traveling wave magnetic field assisted flash welding method and equipment for rare earth alloyed wheel steel, and the method adopts a traveling wave magnetic field assisted flash welding process for the rare earth alloyed wheel steel meeting the automobile lightweight requirement, and enables a traveling wave magnetic field to continuously act on a welding area in the full stages of preheating, flashing and upsetting. Wherein the rare earth elements comprise cerium (Ce) and the like, and the components of the wheel steel are optimized through microalloying treatment; the temperature is accurately controlled to be 500-650 DEG C in the preheating stage, a traveling wave magnetic field of 10-30 mT and 50-100 Hz and specific welding parameters are adopted in the flash stage, the upsetting distance is controlled to be 2-5 mm and the upsetting pressure is controlled to be 6-8 MPa in the upsetting stage, heat transfer, metal flow and rare earth distribution are improved by means of the magnetic field, grains are refined, and defects are reduced. Meanwhile, the magnetic field and welding parameters are optimized through machine learning, and the purpose of minimizing the grain size is achieved. The method can remarkably improve the metallurgical bonding strength and the structure performance of the weld joint, and is suitable for efficient and high-quality welding of the rare earth alloying wheel steel.

The invention relates to the field of extrusion forming of piston skirts, in particular to an extrusion forming process of a large-size piston skirt of a marine diesel engine, which comprises the following steps of: placing a piston skirt raw material in a pre-forging annular die and a pre-forging lower die, pressing and moving downwards through a pre-forging convex die, forming a piston skirt pre-forging piece, taking out the pre-forging convex die, and replacing the pre-forging convex die with a finish-forging convex die; according to the method, the extrusion deformation process of the piston skirt is optimized, the internal metal deformation is smoother, the structure is more uniform, the metal flowing state of an area A with the most concentrated stress in the using process of the piston skirt is particularly improved, and the piston skirt forging is formed through downward pressing and movement of the finish-forging male die. And the overall quality is improved.

An improved direct smelting vessel includes a smelting reduction vessel (SRV) and optionally a cyclone converter (CCF). The SRV provides means for promoting metal mixing in an area beneath a slag layer adjacent a vessel wall of the direct smelting vessel. The device for promoting metal mixing may include a layered refractory hearth having two refractory base plate layers, a refractory hearth having one or more gas bubbling devices, and / or at least one pair of solids injection guns (or other devices) that provide alternating solids injection at any given time. The device for promoting metal mixing reduces the stagnation zone capable of supporting a semi-solid slag layer that limits metal-slag heat transfer. The means for promoting metal mixing maintain an effective temperature difference between the metal flowing out of the forehearth and the metal at the vessel wall not greater than 40 DEG C.

The invention belongs to the field of profile steel production, and particularly relates to a rolling method of hot-rolled Q450NQR1 weather-resistant H profile steel, which adopts a reversible cogging mill and a universal finishing mill group for rolling: after the cogging mill rolls for 3-5 passes for cogging, a universal continuous rolling mill is adopted for finish rolling 9 continuous rolling, and the arrangement sequence of finish rolling hole patterns is U1-U2-U3-E4-U5-U6-U7-E8-U9; wherein the U3 and the U6 are curved web hole patterns, and the vertical roll is in drum-shaped design. The method has the advantages that one BD cogging mill is used for large-rolling-reduction rolling to crush crystal grains, and then the nine-rack universal continuous rolling mill is used for finish rolling, so that the metal flowing and steel biting conditions are improved. The grain structure is refined through large rolling reduction and low-temperature rolling, the problems that the Q450NQR1 weathering resistant steel is poor in metal fluidity, prone to cracking and the like due to alloy elements are effectively solved, and meanwhile the mechanical property, the size precision and the surface quality of products are guaranteed.

The utility model relates to an alloy bar processing technology, and discloses a raw material structure for producing a high-temperature alloy bar, which comprises a high-temperature alloy blank, an integrated head sleeve, a first tail pad and a second tail pad, the high-temperature alloy blank is arranged in an inner cavity of the integrated head sleeve, the first tail pad is fixedly welded at the end part of the rear side of the integrated head sleeve, and the second tail pad is welded at the end part of the rear side of the integrated head sleeve. A second tail pad is movably arranged on the rear side of the first tail pad. A cylinder is arranged at the front end of the integrated head sleeve and connected with a conical surface, the rear side of the conical surface is connected with a cylindrical surface, the head shape of an inner cavity of the integrated head sleeve is a first circular plane, the rear side of the first circular plane is a first conical surface, and the rear side of the first conical surface is connected with a second conical surface. By optimizing the raw material structure, the extrusion force is reduced, the stress condition in the extrusion process is improved, the metal flow uniformity is promoted, extrusion cracks are avoided, the bar quality and the raw material utilization rate are improved, and the high-temperature alloy bar extrusion device is suitable for production of high-temperature alloy bars.

The invention belongs to the technical field of ring piece rolling forming and manufacturing, and discloses a design method for a complex special-shaped ring rolling preformed blank with inner and outer grooves based on metal flow regulation and control. The shape of a preformed blank is designed to be a special-shaped section annular blank with the height of an outer side groove lower than that of an outer side groove of a target ring piece; the deformation amount of the pre-rolling step and the deformation amount of the final rolling step are distributed, the total deformation amount, the deformation amount of the pre-rolling step and the deformation amount of the final rolling step in the ring rolling process are determined through the outer diameter ratio, and the numerical value relation among the three deformation amounts is met; on the basis of the deformation distribution result, various size parameters of the preformed blank are determined, and the size parameters comprise the height, the outer side transition area bevel angle, the outer side groove depth, the outer side groove outer diameter, the end face outer diameter and the inner diameter. According to the method, metal flowing regulation and control are achieved through multi-step rolling, metal is effectively promoted to fill the cavity, the defect of under-filling is avoided, and the material utilization rate and the preformed blank design efficiency are improved.

A vehicle-mounted camera shell serves as a core component of an automobile intelligent driving system and needs to meet the strict requirements of high-precision assembly, high heat dissipation performance, environmental corrosion resistance (such as salt mist), laser welding reliability and the like. The invention discloses a process for laser welding of a vehicle-mounted camera metal shell in the Chinese patent CN115958292A, the production process of the shell is completed through laser welding, along with the development of the technology, the cold extrusion technology becomes a better choice, according to the vehicle-mounted camera shell cold extrusion process for the new energy vehicle and the optimization method thereof, the production cost is reduced, and the production efficiency is improved. Through the combination of a gradient pressurizing cold extrusion process and customized mold design, the problem of internal defects caused by nonuniformity of metal flow is solved, meanwhile, the surface treatment procedure cohesion is optimized, and the thread structure requirement of a low-yield-strength material is met; the device has the advantages that the shell forming quality is improved, the planeness precision of the clamping face is improved, the surface treatment procedure cohesion is optimized, and the device is adaptive to a low-yield-strength material thread structure.

The utility model discloses a molten aluminum runner prefabricated part structure with a thermal insulation layer, which belongs to the technical field of metal diversion trenches and comprises a base, a diversion trench and a top cover. The flow guide groove is composed of a high-temperature contact plate, a ceramic fiber plate, a reflecting film and a protective shell which are sequentially connected from inside to outside in a sleeved mode, the top cover is connected to the top of the flow guide groove, the top cover seals the top of the flow guide groove, and heat loss generated when aluminum water flows can be reduced; the heat preservation performance in the aluminum water conveying process can be remarkably improved, and oxidation and pollution are reduced.

An embodiment of the present invention provides a free grounding film, a circuit board and a method for preparing the free grounding film, wherein the free grounding film comprises a stacked resin film layer and an adhesive film layer, wherein the resin film layer is provided with a first through hole, and a metal protrusion is provided at the first through hole, and the metal protrusion extends into the adhesive film layer; the metal protrusion is formed by fusible metal flowing from one side of the first through hole to the other side at a preset temperature and then instantly cooling; when the free grounding film is used for grounding of a printed circuit board, the free grounding film is pressed together with the electromagnetic shielding film on the printed circuit board through its adhesive film layer, and the metal protrusion pierces the insulating layer of the adhesive film layer and the electromagnetic shielding film, and is electrically connected to the shielding layer of the electromagnetic shielding film, thereby effectively conducting out the interference charges accumulated in the shielding layer, avoiding the accumulation of interference charges to form an interference source, and thereby effectively ensuring the integrity of signal transmission.

The application provides a rolling forming method for a complete conformance streamline raceway of a tapered roller bearing, and belongs to the field of bearing preparation. A blank is designed according to the size of an outer ring of the tapered roller bearing, the size of a bar material for blanking is determined, the blank is obtained by blanking, and the height-diameter ratio of the bar material is controlled to be small during the blanking process. The intermediate material is obtained by upsetting the bar material according to the upsetting ratio, the upsetting ratio of the bar material is controlled to be small during the upsetting process of the bar material, the intermediate material is obtained by extrusion forming and stamping, the blank is punched to obtain a ring blank, the ring blank is rolled by using a full-closed pass to realize the conformance streamline forming of the raceway and obtain a final forging, and the rolling ratio is controlled to be large under the condition that a core roller can be put into the full-closed pass. The application considers the influence of the blanking process on subsequent blank making, designs the volume of the bar material and the blanking diameter, makes the height-diameter ratio of the bar material as small as possible, and reduces the radial flow of the bearing ring metal in this stage. The application considers the influence of the upsetting process on the metal flow in subsequent rolling, designs a reasonable upsetting ratio, makes the upsetting ratio as small as possible, and reduces the adverse influence of uneven deformation in the forging process on the metal streamline distribution.

The utility model relates to the field of industrial die casting, especially to the die casting die of automobile engine casing, including support frame, still including connecting frame and liquid storage box, be provided with die casting on the support frame, and the die casting includes bottom die, upper die and injection chamber, the utility model discloses through the telescopic link of cylinder drive liquid storage box is located in the upper end of support frame and carries out the sliding in position, and through the output of liquid storage box top while sliding the lower end of upper die and the upper end of bottom die are carried out the work of spraying release agent, through the upper die on the die casting and move downward, make the upper die drive second limit rod downward displacement drive slider and move downward, make the lower end of upper die and the upper end of bottom die mutually adhere, then inject liquid metal from injection chamber, liquid metal flows to the gap between bottom die and upper die and die casting forming, after forming, the upper die moves upward, the casing on the bottom die passes through the upward thrust of the reaction force of spring of lower slider, realize the work of automatic release of casing.

The invention relates to the field of profile manufacturing, in particular to a forming method of a 5A30 aluminum alloy F-shaped profile and an extrusion die for preparing the F-shaped profile. According to the forming method of the 5A30 aluminum alloy F-shaped sectional material, the specifically-designed flow guide mold is additionally arranged in front of the sectional material mold to increase pre-deformation of metal, the extrusion technology is optimized, and the forming problem of the 5A30 aluminum alloy F-shaped complex sectional material is solved. According to the invention, the flow guide holes are adopted to increase the geometric similarity of the blank and the profile, so that the flow of metal is conveniently controlled, particularly, the flow rate of metal can be adjusted for extruding the F-shaped profile with large section difference, and the formation of the F-shaped profile with large wall thickness difference, complex shape and high difficulty is improved by combining with a specific extrusion speed. Meanwhile, twisting and bending deformation of the F-shaped profile can be reduced, the stress condition of the die is improved, and the service life of the die is greatly prolonged.

The present application relates to the technical field of plastic precision forming of metal profiles, and specifically to a precision plastic forming method and equipment for metal profiles. The equipment is provided with an upper die movement mechanism and a lower die setting mechanism. The movement execution mechanism of the upper die movement mechanism is installed with a bus roller set. The lower die plate of the lower die setting mechanism is installed with a bottom die cavity with different profile structures. Through one-way linear movement of the hydraulic cylinder of the movement execution mechanism and extrusion and shearing of the bus roller set, metal flow fills the bottom die surface to realize the processing of the metal profile. The present application can be used for the forming of metal profiles with different specifications and cross-sectional forms, including but not limited to channel steel, bulb steel and other products. The present application can be used for ferrous metals, non-ferrous metals, composite materials and the like, and can also be used for hot forming, warm forming and cold forming. The present application is a local incremental forming method, which has the advantages of high forming efficiency, high product size precision, small springback, good flatness, small forming force and the like.

The invention relates to the field of aluminum profiles, and particularly discloses an aluminum profile for a bicycle frame, a preparation method of the aluminum profile and the bicycle frame. The preparation method comprises the following steps: (1) preparing raw materials; the formula of the raw materials comprises 0.4%-0.8% of Si, 1.0%-1.2% of Mg, 0.5%-1.0% of Cu, 0.01%-0.1% of Mn, 0.01%-0.1% of Cr, 0.1%-0.5% of Zn, 0.3%-0.8% of Fe, 0.1%-0.2% of Ti, 0.01%-0.05% of Sc and the balance Al and inevitable impurities. (2) smelting and casting; (3) homogenizing treatment; (4) extruding; (5) aging treatment; the extrusion die comprises a male die and a female die which are fixedly connected, and the male die comprises a die core, a die bridge and a shunting hole; in the direction from the male die to the female die, the die bridge deflects clockwise or anticlockwise, and the extension line of the die bridge to the die core deviates from the center line of the die core; and the extrusion metal flow rotates clockwise or anticlockwise in the flowing process. By implementing the method, the mechanical property and the corrosion resistance of the aluminum profile can be improved.

The present application relates to a kind of composite structure cold heading extrusion die, including upper die and lower die.The upper die is the overall flat bottom angle convex die, and the shaped end face is provided with the profile contour of twelve-angle and flange composite.The lower die adopts transverse segmentation type three-layer concave die structure, and is sequentially from inside to outside working die core and insert, inner layer and outer layer prestressed ring, press sleeve;Working die core and / or insert adopt Cr12MoV and are quenched by vacuum tempering, and press sleeve adopts 45 steel.The lower die is provided with the unloading rod of stepped inner cavity, and is matched with the lower end of convex die when die is closed, and metal flow is constrained, and is independently pushed up when die is opened Demoulding.The present application is dispersed by prestressed ring layering constraint load, and stress concentration is slowed down, and metal flow is improved by unloading rod and the risk of sticking die is reduced, with the advantages of high forming precision, smooth unloading, long service life, suitable for the cold heading forming of complex special-shaped head workpiece.

The invention belongs to the technical field of forging, and relates to a forging method for grain size refinement of a GH4169 alloy direct aging disc forge piece. The method comprises the following steps: blanking and chamfering edges and corners of a GH4169 alloy bar; the blank is a big-end-up cake blank with a convex outer circle, a positioning groove is formed in the upper end of the cake blank, and a deformation groove is formed in the lower end of the cake blank; the convex outer circular surface is divided into an outer inclined section which is inclined outwards, a cylindrical section, an inner inclined section which is inclined inwards and a positioning curved surface section from top to bottom; the moulding bed cavity wall corresponding to the positioning curved surface section is used for fixing the lower end of the bar; die forging is carried out on the waste blank which is turned over up and down; the positioning groove is clamped in a lower forging die cavity to be used for forming an inner transition area of the leg part and the disc part of the disc forging piece, under the constraint of the forging die, rough blank metal flows outwards, the metal between the positioning groove and the outer inclined section fills the leg part, the cylindrical section fills the center of the disc part, the inner inclined section partially fills the center of the disc part, and the disc edge of the disc part is partially filled. And the disc edge is filled with the deformed groove and the positioning curved surface section metal.