177 results about "Cold forming" patented technology

The invention relates to a 1100MPa-grade high-strength tool steel wire rod and a manufacturing method thereof, the wire rod adopts a middle-carbon Nb-V-containing chemical component design, after a steel billet is rolled and spun into the wire rod according to the spinning temperature of more than or equal to 860 DEG C, online molten salt semi-quenching isothermal treatment is performed, the wire rod is controlled to be subjected to front-section molten salt treatment, and then the steel wire rod is subjected to hot rolling and hot rolling to obtain the 1100MPa-grade high-strength tool steel wire rod. According to the method, the steel wire rod enters a bainite phase region from a high-temperature austenite state at the cooling speed of more than or equal to 30 DEG C / s to form a structure taking quenched bainite as a main component, and then is subjected to rear-section molten salt heating isothermal tempering and toughening destressing treatment, and finally is subjected to roller way slow cooling to prepare the steel wire rod with a microscopic structure comprising tempered bainite and ferrite, so that the material cost can be reduced, and the production efficiency is improved. The method has the advantages that martensite brittle structures are effectively avoided, the structure state of the hot-rolled wire rod is controlled, the plasticity and cold working performance of the wire rod are improved, the tensile strength of the product can reach 980-1030 MPa, the percentage reduction of area is 61%-66%, and the product can be directly machined into tool parts after cold forming.

The invention relates to a cold heading production method of a universal joint external spline sliding fork, which comprises the following steps of: cutting a raw material into a cylindrical blank, and performing cold extrusion diameter reduction to form a rod part, a transition circular truncated cone and a cylinder for manufacturing a spline; the fork-shaped part of the universal joint fork is upset through the working procedures of pre-forming, first-time forming of the fork part, second-time forming of the fork part, third-time forming of the fork part and the like, and spline forming of the spline shaft part and shaping and trimming of the fork-shaped part are completed through the cold upsetting finishing working procedure; and finally, the universal joint sliding yoke is machined to form a bearing hole and a check ring groove, and extrusion flashes and burrs generated in the extrusion production process are removed and polished. Compared with traditional hot forging machining, the machining method of the universal joint external spline sliding yoke saves energy consumption of heating forging through a cold forming mode, the needed external spline structure can be synchronously machined, the workload of machining is greatly reduced, raw materials are saved, and the mechanical strength and the surface quality of parts are improved.

The invention relates to a process forming method for a large thick-wall special-shaped curved surface carbon steel stainless steel shell. According to the process forming method, it is ensured that the high-precision molded surface size of the special-shaped curved surface shell is achieved in the forming process through multi-link optimization control. On the basis of allowance amplification optimization of three-dimensional modeling and expansion, by combining numerical control cutting and leveling processes, simulating a cutter pressing line path through software, and performing trial-manufacturing verification by using equal-proportion sample pieces; line-by-line and tool-by-tool pressing and two times of shaping inspection are adopted in the step-by-step pressing process, and the local deformation amount is corrected in real time; in the pre-assembly stage, the goodness of fit of assembly lines is ensured through three-dimensional lofting and scribing and tool positioning, and welding thermal deformation and residual stress are effectively controlled in cooperation with anti-deformation tool welding and aging treatment. Digital simulation, parameter iterative optimization, process error compensation and mechanical stability control are fused in the whole process, so that the profile precision of the shell meets the design requirement in the cold forming stage, and relying on machining correction is avoided.

The invention discloses hot-rolled ultrahigh-strength automobile steel as well as a manufacturing method, a hot forming method and a cold forming method of the hot-rolled ultrahigh-strength automobile steel. Belongs to the technical field of steel for automobiles, and the steel for the automobiles comprises the following chemical components in percentage by weight: 0.22-0.27% of C, 1.2-1.8% of Si, 2.2-2.6% of Cr, 1.0-1.4% of Mn, 0.02-0.03% of Nb, 0.02-0.05% of Al, less than or equal to 0.020% of P, less than or equal to 0.010% of S, less than or equal to 0.0003% of H and the balance of Fe and inevitable impurities. The automobile steel can be directly subjected to cold forming or hot forming, the tensile strength of the automobile steel can reach 1500 MPa or above during cold forming, the tensile strength of the automobile steel can reach 1800 MPa or above after hot forming, meanwhile, precious metal is not added, and the production cost is low.

The invention relates to a 1150MPa-grade high-strength carbon tool steel wire rod and a manufacturing method thereof.The 1150MPa-grade high-strength carbon tool steel wire rod comprises, by mass, 0.57%-0.62% of C, 0.38%-0.47% of Si, 0.53%-0.63% of Mn, smaller than or equal to 0.015% of P, smaller than or equal to 0.015% of S and the balance Fe and inevitable impurities, after the wire rod is rolled and spun, online molten salt isothermal toughening treatment is conducted on the wire rod, the wire rod is controlled to enter a sorbite phase region from a high-temperature austenite state, and the steel wire rod is subjected to high-temperature annealing treatment; the method comprises the following steps of: preparing a steel wire rod of which the microscopic structure comprises tempered sorbite, ferrite and fused sorbite, forming a structure mainly comprising fine lamellar spacing sorbite, carrying out isothermal tempering, and finally slowly cooling through a roller way, so that the steel wire rod of which the microscopic structure comprises tempered sorbite, ferrite and fused sorbite can reach the tensile strength of 1050-1100MPa and the percentage reduction of area of 45-50%, and can be applied to the application fields of manufacturing carbon tool steel and the like. And therefore, a tool part can be directly processed after cold forming.

The invention relates to a 1150MPa-grade high-strength tool steel wire rod and a manufacturing method thereof, the wire rod adopts a high-Cr medium-carbon component design, after a steel billet is rolled and spun into the wire rod, on-line molten salt low-temperature quenching isothermal treatment is performed, the wire rod is controlled to be subjected to front-section molten salt treatment firstly, the wire rod enters a lower bainite phase region from a high-temperature austenite state at a cooling speed of more than or equal to 35 DEG C / s, and the steel wire rod is subjected to high-temperature quenching isothermal treatment at a cooling speed of more than or equal to 35 DEG C / s; the method comprises the following steps: quenching bainite to form a structure taking the quenched bainite as a main part, then carrying out rear-section molten salt heating isothermal tempering and toughening destressing treatment, and finally carrying out roller bed cover opening slow cooling to prepare the wire rod with a microscopic structure comprising tempered bainite and ferrite, so that the initiation of an abnormal brittle structure can be inhibited, the structure state of the wire rod is effectively controlled, and the toughness performance matching of the wire rod is improved; the tensile strength is 1050-1100 MPa, and the percentage reduction of area is 59%-64%, so that the alloy can be directly processed into parts after cold forming.

The invention relates to a 1450MPa-grade high-strength tool steel wire rod and a manufacturing method thereof.The method includes the steps that after Nb-V chemical component design rolling and spinning are conducted to form a wire rod, online molten salt phase change regulation and control quenching isothermal treatment is conducted, the wire rod is controlled to be cooled from a high-temperature austenite state at the front-section molten salt at the cooling speed larger than or equal to 36 DEG C / s, part of austenite is promoted to be converted into a martensite structure, and then the temperature of molten salt is reduced from the high-temperature austenite state at the cooling speed larger than or equal to 36 DEG C / s; the method comprises the following steps: heating to a sorbite phase region through a rear-section molten salt, promoting the transformation of austenite residues to a sorbite structure, carrying out isothermal tempering toughening destressing treatment on the structure, and finally carrying out roller way slow cooling to prepare the wire rod with a microscopic structure comprising isothermal sorbite and tempered martensite, so that the strength and plasticity matching of the wire rod can be improved, the tensile strength is 1410-1460 MPa, and the tensile strength is 410-460 MPa. The percentage reduction of area is 37%-42%, additional heat treatment is avoided after cold machining forming, tool steel parts are directly machined, the production energy consumption and cost of the high-strength tool steel are reduced, and the production efficiency is improved.

The application discloses a high cold formability austenitic stainless steel cold-rolled plate and a production method thereof, and solves the technical problem of poor cold formability of the austenitic stainless steel cold-rolled plate. The high cold formability austenitic stainless steel cold-rolled plate comprises the following components in percentage by mass: C: 0.035-0.045%, Si: 0.25-0.3%, Mn: 2-3%, Cr: 14-14.5%, Ni: 9-9.5%, N: 0.17-0.20%, Cu: 1.3-1.6%, Mo: 0.5-0.7%, and the rest is Fe and inevitable impurity elements. The production method of the high cold formability austenitic stainless steel cold-rolled plate comprises smelting, refining, slab continuous casting, cold rolling, heat treatment and coiling. The application can improve the cold forming performance of the cold-rolled plate, and meanwhile, guarantees that the microstructure performance of the cold-rolled plate is stable after forming.

According to the NM450 wear-resistant steel suitable for the polar working condition and the production method thereof, low-cost component design is adopted, and the process steps comprise smelting, refining, continuous casting, heating, rolling and heat treatment; the steel-making process and harmful elements are strictly controlled to improve the purity of molten steel so as to improve the internal quality of the steel plate, and a strict rolling, quenching and low-temperature tempering heat treatment process is adopted. The NM450 wear-resistant steel plate which is high in toughness adaptability, high in wear resistance and excellent in cold forming performance comprehensive performance is developed, the thickness ranges from 6 mm to 30 mm, the surface hardness ranges from 450 HBW to 480 HBW, the core hardness ranges from 440 HBW to 465 HBW, and the core hardness reaches 95% or above of the surface hardness; the yield strength is not less than 1200 MPa, the tensile strength is not less than 1400 MPa, and the elongation is not less than 13%; the impact AKV at-50 DEG C is greater than or equal to 60J, and the impact AKV at-60 DEG C is greater than or equal to 40J; the bending angle is 90 degrees, the bending diameter D is 6a, and the cold bending result is intact.

The invention relates to metallurgy, and more particularly to a sheet material made of titanium alloys that are resistant to high heat and oxidation and exhibit structural stability under prolonged operational exposure to temperatures in a range of up to 800° C. and can be used for manufacturing components of a vehicle exhaust system. The present titanium alloy sheet material for the manufacture of components contains: 1.5-3.0 wt % aluminium, 0.1-0.5 wt % molybdenum, 0.1-0.6 wt % silicon, not more than 0.2 wt % iron, not more than 0.15 wt % oxygen, not more than 0.1 wt % carbon, not more than 0.03 wt % nitrogen, not more than 0.015 wt % hydrogen, and the balance titanium. The sheet material has high creep resistance and oxidation resistance values, as well as a stable structure under prolonged operational exposure to temperatures in a range of up to 800° C. The material is suitable for cold forming.

A high pressure cartridge case is fabricated by: providing a wire or rod; cold forming a cartridge case into a drawn blank or a tubular component from sheared lengths of the wire or rod; annealing the cartridge case using a belt furnace, flame furnace, induction furnace, or a batch furnace; performing a machine ejector slot and trim on the cartridge case; forming the shoulder and neck of the cartridge case; performing a heat treatment of the cartridge case; and tempering the cartridge case.

Method of manufacturing a steel strip comprising the steps of: - casting a molten steel into a slab; - reheating the slab at a temperature of 1150°C or more for a time of 1 hour or more; - hot rolling the steel into a strip, preferably using an average F1 slab entry temperature of more than 1000°C; - coiling the hot rolled steel strip; - batch annealing the steel strip: - at a temperature in the intercritical range (i.e. between Ac1 and Ac3), preferably less than 700°C; - in a non-oxidizing and non-nitrogenizing atmosphere; - for a total annealing time of at least 5 hours, preferably at least 10 hours so as to obtain: a Mn enrichment in austenite such that the Mn content is at least 1.25 times the overall Mn content of the steel; and a C enrichment such that the C content is at least 1.2 times the overall C content of the steel; - cooling the steel after batch annealing in air, forced air or water quenching.

The utility model discloses a cold forming wire stretching detection device which comprises a guide frame, a guide clamping plate, an upper limiting frame, a wire detection sleeve, a lower limiting frame, a case, a hydraulic rod and a clamp, the upper limiting frame is arranged on one side of the guide frame through the guide clamping plate, the hydraulic rod is arranged on the upper limiting frame, the telescopic end of the hydraulic rod is connected with the clamp, and the wire detection sleeve is arranged on the lower limiting frame. A wire detection sleeve is arranged in the middle of the guide frame through a connecting rod, a case is arranged at the bottom end of the guide frame, and a hanging ring is arranged at the top of the guide frame. The wire rod stretching device is provided with the guide frame, the upper limiting frame is arranged on the inner side of the guide frame through the guide clamping plate, the clamp controlled by the hydraulic rod is arranged on the upper limiting frame, the height of the clamp can be conveniently adjusted through the upper limiting frame, a clamped wire rod can be subjected to stretching control through the clamp, control is convenient, and the lifting ring is arranged at the top of the guide frame. The equipment can be conveniently hoisted and fixed; a wire detection sleeve is arranged in the middle of the guide frame through a connecting rod, and the wire can be limited through the wire detection sleeve.

A tool (100) for cold forming of splines on a pre-machined blank includes an annular shaped die holder (102) and an annular shaped die (104) concentrically fixed to the die holder (102). The die (104) includes splined profile matching profile of the splines to be formed on an inner circumference of the annular shaped die (104). The tool (100) is configured to concentrically locate the blank (300) over the die (104) such that when the blank is forced against the die (104), the splined profile of the die (104) deforms the spline portion (304) of the blank (300) to generate the splines. The blank includes an undercut located between a gear portion (302) and a spline portion (304) of the blank to accommodate material flow due to deformation of the spline portion (304) of the blank (300) during generation of the splines.

The invention discloses a method for preparing a clad plate strip by adopting a hot continuous rolling process and the clad plate strip. The method sequentially comprises the steps of plate blank heating, rough rolling, clad blank preparation, clad rolling, controlled cooling and coiling, wherein a plate blank is subjected to surface polishing after being subjected to rough rolling and dephosphorization, then is subjected to preliminary covering and welding with a to-be-covered plate strip to form a covering blank, and then enters a finishing mill group to be subjected to covering rolling; the surface polishing of the plate blank, the preliminary covering of the to-be-covered coil and the welding are all carried out in an atmosphere protection cover, and N2, CO2 or a mixed gas of N2 and CO2 is introduced into the atmosphere protection cover; the plate blank is made of carbon steel; and the plate strip to be covered comprises titanium, copper or stainless steel. According to the invention, the hot continuous rolling process is adopted to produce the clad plate strip on line, the clad plate strip integrates the excellent characteristics of corrosion resistance, electric conduction, heat dissipation and beauty of the clad layer and high strength of the substrate, and the cost is lower and the application range is wider to the greatest extent; the product has the characteristics of corrosion resistance, good heat dissipation performance, easiness in cold forming processing, attractive appearance and no coating.

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 present invention relates to a 1100MPa grade high-strength tool steel wire rod and a manufacturing method thereof. The wire rod is designed with a chemical composition of medium carbon and Nb-V. The steel billet is rolled and spun into wire rod at a spinning temperature of 860°C or higher. The wire rod is then subjected to an online molten salt semi-quenching isothermal treatment. The wire rod is controlled to first undergo a front-end molten salt treatment so that the wire rod enters a bainite phase region from a high-temperature austenite state at a cooling rate of 30°C / s or higher, forming a structure mainly composed of quenched bainite. The wire rod is then subjected to a rear-end molten salt heating isothermal tempering and toughening stress relief treatment. Finally, the wire rod is slowly cooled on a roller to form a wire rod with a microstructure including tempered bainite and ferrite. The method can reduce material cost, effectively avoid martensitic brittle structure, control the microstructure of the hot-rolled wire rod, improve the plasticity and cold working performance of the wire rod, and achieve a product tensile strength of 980-1030MPa and a cross-sectional reduction rate of 61%-66%, so that the product can be directly processed into tool parts after cold forming.

The invention belongs to the technical field of metal processing lubrication, and provides high-extreme-pressure anti-wear emulsion type expanding oil and a preparation method of the high-extreme-pressure anti-wear emulsion type expanding oil. Comprising the following steps: compounding naphthenic base oil, polyalkyl benzyl sulfide, vulcanized vegetable oil, sodium dodecyl benzene sulfonate, octylphenol polyoxyethylene ether, benzotriazole and methyldiethanolamine according to specific parts by mass to construct a carrier-extreme pressure-emulsification-corrosion prevention integrated system; wherein the naphthenic base oil (the kinematic viscosity at 40 DEG C is 350-400 mm / s) provides a stable carrier, the polyalkyl benzyl sulfide (the sulfur content is 20-30%) is a chloride-free extreme pressure core, the composite emulsifier ensures the stability of the system, and efficient protection is realized through double-component corrosion prevention; according to the invention, the 3% emulsion can be stably placed for more than or equal to 2 weeks, the maximum non-seizure load is more than 1800N, the emulsion is suitable for expanding large-diameter steel pipes made of Q235A, X70 / X80 and the like and cold forming processing of metal, the problems of insufficient extreme pressure, unstable emulsification, poor environmental protection property and the like of the existing product are solved, and the processing quality and efficiency are improved.

The application provides a hot-dip aluminum-silicon 980MPa Q&P steel cold forming steel plate and a preparation method thereof, and the component of the hot-dip aluminum-silicon base plate is as follows in percentage by mass: C: 0.18% to 0.24%, Si: 1.4% to 2.8%, Mn: 1.9% to 2.5%, P: less than or equal to 0.02%, S: less than or equal to 0.005%, Ti: 0.01 to 0.04%, Nb: less than or equal to 0.04%, Al: less than or equal to 0.005%, and the balance of Fe and inevitable impurities. The preparation method comprises a series of processes such as smelting, hot rolling, pickling, cold rolling, continuous annealing hot-dip aluminum-silicon, and finishing, and the hot-dip aluminum-silicon is ingeniously carried out in the slow cooling stage, perfectly matches the heat treatment system, breaks the limitation that the hot-dip galvanized steel plate must be over-aged at high temperature for a short time, and can make the bainite transformation sufficient; the hot-dip aluminum-silicon 980MPa Q&P steel produced by the application has excellent strength and plasticity.

This invention discloses an electric field-assisted spline cold forming method and machine tool; this invention belongs to the technical field of machining and metal plastic forming equipment; it aims to solve the problems of high load, rapid mold wear and poor forming quality in the cold forming of splines of difficult-to-deform materials such as high-strength alloy steel and titanium alloy; the positive terminal of the pulse power supply forms a circuit with the workpiece through the center and the negative terminal through the brush, so that the high-frequency pulse current flows directly through the cold forming deformation zone, inducing the electroplastic effect, reducing the yield strength of the material and improving plasticity; on this basis, the symmetrically arranged cold forming tools apply radial force to the workpiece as the spindle rotates, and the spline teeth are formed by the axial feed and rotation of the workpiece; this method deeply couples electric field softening with mechanical forming, fundamentally reducing the forming load, extending the mold life and improving the spline dimensional accuracy and surface quality.

The invention relates to the technical field of metal heat treatment, in particular to medium-carbon structural steel for cold forging hub bearings and a continuous spheroidizing annealing process thereof.The medium-carbon structural steel for the cold forging hub bearings in a hot rolling state is slowly heated to the temperature below Ac1 and then heated to the temperature within the Ac1-Ac3 two-phase region temperature range for heat preservation, the medium-carbon structural steel is cooled to Ar3 according to the set cooling speed for heat preservation, and then the medium-carbon structural steel for the cold forging hub bearings is obtained; and cooling to the temperature below Ar1 according to the set cooling speed, preserving heat, entering a non-heat-supply section, slowly cooling, and discharging from the furnace. According to the method, control over the heating rate below Ac1, heating near Ac3 and grading isothermal treatment near Ar3 and below Ar1 are introduced into a traditional spheroidizing annealing system, optimization regulation and control over the carbide form and distribution state are achieved, the morphology stability of spheroidizing carbide is improved, abnormal structure generation is inhibited, the spheroidizing rate is larger than or equal to 80%, finally, the hardness of round steel is stably controlled within the interval of 160-170 HBW, and the spheroidizing quality is improved. And the work hardening sensitivity and the cracking tendency in the material cold forming process are effectively reduced, and the plasticity and the surface quality of the material are improved.

The application discloses a laser composite self-punch riveting process for aluminum alloy plate connection and belongs to the technical field of metal material connection. The process prepares a precise micro-groove structure in a connection area through femtosecond laser, combines ultrasonic deep cleaning and controllable pressure riveting process, and realizes the synergistic strengthening of interface mechanical interlocking and metallurgical bonding. Specifically, the process includes material surface treatment, laser micro-texturing processing, high-precision positioning, cold forming riveting and interface strengthening stages. The laser cold processing technology is used to avoid thermal damage, significantly improve the interface bonding strength and fatigue resistance, and the application discards the traditional adhesive process, effectively solves the riveting stress concentration and adhesive layer environmental aging problems, is suitable for the high-reliability connection demand of lightweight structures, and especially exhibits excellent environmental tolerance under complex working conditions.

The utility model belongs to the technical field of cold forming, and particularly relates to a cold forming die for bending a circular plate for an oil press. The die comprises an upper die body and a lower die body, the upper die body comprises a connecting top plate, a reinforcing rib arranged below the connecting top plate, a male die body fixed to the lower portion of the reinforcing rib and a positioning baffle fixed to the reinforcing rib, and the lower die body comprises a female die body, a positioning guide rod fixed to the side edge of the female die body and a plate positioning groove formed in the inner side of the female die body. A positioning guide rod in the lower mold is matched with a positioning baffle in the upper mold, it is ensured that the upper mold and the lower mold are always located on the same axis in the running process, and a demolding structure is arranged at the bottom of the lower mold. According to the cold forming die, cold forming of circular plate bending is achieved, the movement stability of the die is improved, and the plate forming precision and the production efficiency are improved.

The invention relates to a method for producing a cylindrical metal connector, wherein the connector comprises a tubular body with two internally hollow cylindrical areas joined by an intermediate area with a polygonal outer edge. The method is characterised in that the metal connector is produced from a single tubular metal element by means of a step of cold forming using a first tubular expansion tool intended to be in contact with the side wall of the tubular metal element, the first tool being provided with a section comprising a plurality of radially expandable segments shaped to provide the form of the polygonal intermediate section, each segment having a protruding edge. The segments are expanded by the action of a punch, such that, when the punch moves towards the first tool, as the punch is inserted into the first tool, the segments expand towards the side wall of the tubular body to be shaped, thereby forming the intermediate area with a polygonal edge.

The present disclosure relates to designing of steel composition for line pipe steel to be used for sour environment. The developed steel of the present disclosure exhibits enhanced tensile properties in accordance with API 5L PSL-2 specification for X-65 grade steel, along with superior hydrogen induced cracking resistance with crack length ratio (CLR) of less than 10%, crack thickness ratio (CTR) of less than 5%, crack sensitivity ratio (CSR) of less than 2%. The developed steel is designed such that it is readily hot / cold formed and welded to form linepipe tubes to be used for the transportation of natural gas or crude oil, especially of sour grade. The present disclosure also provide a method of manufacturing the said steel having the composition of the present disclosure.

The invention relates to a method for producing a fluid pump and to a fluid pump, in particular an oil pump, having a housing, wherein a chamber extends along a first direction starting from a first end face of the housing to a second end face of the housing, wherein a piston is movably arranged in a pump section of the chamber, wherein an at least annular sealing section of the piston sealingly rests against an inner wall of the pump section of the piston chamber, wherein a delivery line is formed in the piston, wherein the delivery line extends from a first end face of the piston to a second end face of the piston, wherein the first end face of the piston is arranged outside the chamber, wherein the second end face of the piston is arranged inside the chamber, wherein the delivery line is designed to conduct fluid from the first end face of the piston into the chamber, wherein the piston and / or the housing are made of cold-formed metal.

The invention discloses a corrosion-resistant and high-performance aluminum alloy cable material as well as a preparation method and application thereof, and relates to the technical field of aluminum alloy preparation. The component formula of the conductor is Al-xMg-ySi-zNi-mCe-nSc-qY, x is larger than or equal to 0.05 and smaller than or equal to 0.3, y is larger than or equal to 0.6 and smaller than or equal to 1.4, z is smaller than or equal to 0.35, m is larger than or equal to 0.01 and smaller than or equal to 0.2, n is larger than or equal to 0.03 and smaller than or equal to 0.2, q is larger than or equal to 0.04 and smaller than or equal to 0.1, iron is a main impurity element in the alloy, and the content of the iron is not larger than 0.1%. The aluminum alloy cable material with excellent mechanical properties (the tensile strength is larger than or equal to 122 MPa, and the elongation is larger than or equal to 14%), electrical properties (the conductivity is larger than or equal to 62% IACS) and corrosion resistance (the maximum IGC depth is smaller than 100 micrometers) is prepared by adopting the technological method of flame direct injection smelting, synchronous water quenching pull casting, cold forming machining and non-isothermal aging synchronous heat treatment, and the aluminum alloy cable material is suitable for aluminum alloy cables. The method is short in technological process, good in cable quality, high in corrosion resistance and wide in application prospect.

A steel wire for a spring having excellent cold formability according to one embodiment of the present invention contains, in wt%, 0.60% to 0.66% of C, 1.40% to 1.65% of Si, 0.50% to 0.70% of Mn, 0.50% to 0.80% of Cr, 0.10% to 0.20% of V, 0.020% or less of P, 0.020% or less of S, 0.007% or less of N, and a remainder of Fe and other unavoidable impurities, wherein the microstructure has, in area%, 90% to 95% of tempered martensite and 5% to 10% of retained austenite, and the average aspect ratio of Fe-based carbides precipitated during tempering is 1: 3 to 1: 7.

This invention discloses a hot-spinning composite forming method for thin-walled cylindrical titanium alloy parts based on cold spinning-assisted final forming, belonging to the field of metal material plastic forming. This invention addresses the limitation of deformation under cold forming conditions in titanium alloys due to their high resistance to room temperature deformation and poor plasticity, which easily leads to cracking or surface defects. The invention first preheats the blank, mandrel, and spinning wheel using a flame gun. During the spinning process, an infrared thermal imager is used to monitor the temperature, ensuring a stable spinning temperature for the blank. After hot spinning is completed, a low-speed rotation of the spinning machine spindle combined with low-temperature air cooling ensures uniform cooling of the blank, allowing for rapid transition to the cold spinning process and improving forming efficiency. Simultaneously, this invention employs a larger thinning rate during hot spinning to reduce the number of hot spinning passes, and a smaller thinning rate during cold spinning to increase the forming limit, prevent cold spinning cracking, and improve forming accuracy. This invention meets the increasingly stringent requirements for the comprehensive performance of components in high-end applications.