55 results about "Stress relieving" patented technology

The invention belongs to the technical field of cable twisting, and particularly relates to a conductor surface treatment device and method for cable manufacturing, and the conductor surface treatment device for cable manufacturing comprises a feeding mechanism, a destressing part, a cooling mechanism, a cooling mechanism, a storage mechanism, a diversion mechanism and a disturbance mechanism; the feeding mechanism comprises a carrying table, a supporting cylinder and a material guiding disc, a through hole for a wire to pass through is formed in the outer wall of the material guiding disc, and the material guiding disc is rotationally installed on the carrying table through the supporting cylinder. The destressing part is used for heating the wire; the cooling mechanism is used for cooling the heated wire; the storage mechanism comprises a storage box used for storing cooling liquid and a transfer box. The cooling mechanism comprises a heat exchange plate and an exhaust pipe, the heat exchange plate is fixedly mounted on the inner wall of the storage box, and the exhaust pipe is arranged on one side of the heat exchange plate; the flow guide mechanism comprises a control pump, a conveying pipe and a filter cover, and the transfer box is connected with the storage box through the conveying pipe; through cooperation of the structure, the cable production quality and efficiency are improved, and the equipment maintenance period is prolonged.

The application discloses a nickel-plated steel strip lead processing method and belongs to the technical field of metal material surface treatment. The method aims to solve the problems of poor plating layer adhesion, large internal stress and easy peeling of the existing nickel-plated steel strip lead. The process steps include: S1, steel strip oil removal treatment; S2, composite activation treatment: the oil-removed steel strip is immersed in a composite activation solution containing sodium citrate to remove the surface oxide layer and form an active adsorption film; S3, nickel plating: the activated steel strip is immersed in a sulfate plating solution containing saccharin and 1,4-butynediol as composite additives for electroplating to form a low-stress and high-density nickel plating layer; S4, post-treatment: cleaning and drying; S5, slitting and packaging. The application cooperates sodium citrate activation with a plating solution system containing stress relieving agents, significantly improves the adhesion between the substrate and the plating layer, reduces the internal stress of the plating layer, and the obtained product has no peeling and falling of the plating layer after repeated bending, low porosity and excellent comprehensive performance, and is particularly suitable for the manufacturing of high-performance electronic component leads.

Described herein is a method of manufacturing an aluminium alloy rolled product of a heat-treatable aluminium alloy, comprising: semi-continuous casting a heat-treatable aluminium alloy into a rolling ingot; homogenizing of the rolling ingot to a peak metal temperature (PMT) and whereby said aluminium alloy has a specific energy associated with a DSC signal less than 2J / g in absolute value; hot rolling of the rolling ingot in multiple hot rolling steps into a hot rolled product having a final rolling gauge of at least 1 mm, whereby the hot rolled product during at least one of the last three rolling steps has a temperature less than 50° C. below PMT; quenching of the hot rolled product at final rolling gauge from hot-mill exit temperature to below 175° C.; optionally stress relieving and ageing of the quenched and optionally stress relieved hot rolled product.

The invention discloses a tool clamp for flange pipe fitting welding, and relates to the technical field of flange pipe fitting welding, the tool clamp comprises a hollow carrier plate and a pipe fitting body mounted on the upper surface of the hollow carrier plate, and further comprises a spherical hammer which is arranged on the upper surface of the hollow carrier plate and can knock the welding seam position of the pipe fitting body, the driving mechanism is arranged in the middle of the upper surface of the hollow carrying plate, used for being connected with the spherical hammer and capable of controlling the spherical hammer to move along a set path, and the driving mechanism can drive the spherical hammer to track the welding gun in real time, so that just-molten melt permeates into the deep layer of a welding seam of the pipe fitting body, and synchronous fixing is achieved through the outer fixing plate and the inner fixing rod; a spherical hammer tracks a welding gun to knock a welding seam in real time and timely eliminates stress; an inner fixing rod is switched into a dynamic positioning mode in the knocking process; the pipeline is released at the knocking moment; a permeation space is created for melt;

The present application relates to the technical field of ship welding, and particularly relates to a ship welding residual stress elimination auxiliary tool and a stress elimination device. The ship welding residual stress elimination auxiliary tool comprises a fixing plate for fixing an ultrasonic impact gun, the fixing plate is provided with a fixing hole, the fixing plate is provided with two supporting rods, the supporting rods are uniformly and spacedly arranged around the axis of the fixing hole, and the supporting rods are slidingly arranged on the fixing plate; the supporting rods have threaded sections, and the abutting portions of the supporting rods are located on the same side of the fixing plate; the auxiliary tool adjusting mechanism comprises a driving wheel rotatingly arranged on the fixing plate, the driving wheel is internally provided with a threaded hole threadedly matched with the threaded section of the threaded rod; and an adjusting knob is in transmission connection with the driving wheel. Thus, the problem that the pressing force relies on the experience of workers when the workers hold the ultrasonic impact gun to work, thereby affecting the stress elimination effect and increasing the occupational health risk of the workers is solved.

The invention discloses non-oriented silicon steel for a driving motor and a manufacturing method of the non-oriented silicon steel. The non-oriented silicon steel comprises the following chemical components in percentage by weight: less than or equal to 0.0025% of C, 2.7-3.2% of Si, 0.25-0.50% of Mn, less than or equal to 0.010% of P, 0.65-0.80% of Als, less than or equal to 0.0025% of S, less than or equal to 0.0020% of N, less than or equal to 0.0020% of Ti, 0.015-0.035% of Cu and the balance of Fe and inevitable impurities. The production method comprises the production steps of molten steel smelting, continuous casting, heating, rolling, normalizing pickling, cold rolling, annealing, stamping flaking and stress relief annealing. By adjusting alloy elements and combining process design, on the premise that the excellent magnetic performance of the material is guaranteed, the mechanical performance is improved by adopting a solid solution strengthening principle, deterioration of the magnetic performance in the sheet manufacturing process is eliminated through solid solution and stress relief annealing, the magnetic performance of the iron core is improved, and the mechanical performance of the product is improved.

The application relates to the technical field of metal plate composite technology and discloses a preparation process of a Kovar alloy-copper composite plate, which comprises the following steps: a preparation process of an Invar alloy-copper composite plate, which comprises the following steps: s1, taking one Invar alloy plate and two copper plates; s2, immersing the Invar alloy plate into liquid copper after the Invar alloy plate is heated to 250-300 DEG C; s3, positioning the two copper plates and the Invar alloy plate to form a group of initial composite plate materials; s4, heating the whole in a heating furnace, the heating temperature is 700-850 DEG C, and the heating time is 20-40 min; s5, taking out and cooling to 500-650 DEG C, and then performing hot rolling; s6, performing stress relieving annealing on the composite blank; s7, naturally cooling to normal temperature after annealing, and cold rolling to form an Invar alloy-copper composite plate with a preset thickness. The Invar alloy-copper composite plate prepared through the process is more stable and not easy to separate between the plates, the composite plate has the physical properties of the Kovar alloy and good thermal conductivity.

Processing method for avoiding burning of titanium alloy bushing coated with TiN by PVD, belongs to the technical field of bushing production. The method comprises the following steps: S1: pretreatment; S2: numerical control rough machining; S3: bench work and stress relief; S4: numerical control semi-finishing and grinding; S5: numerical control finishing; S6: inspection and treatment. The present application increases the stress relief process before the finishing process, releases the stress generated during the rough machining of the part, and avoids the deformation of the workpiece caused by stress release during finishing or PVD TiN coating process, resulting in size out-of-tolerance. Adjust the marking process sequence of the workpiece, which can effectively prevent the high-precision size of finishing from deforming due to external force during the marking process, resulting in size out-of-tolerance.

This invention relates to the field of heat treatment methods and discloses a quenching and tempering heat treatment process for 42CrMo1 steel based on end-quenching value control. The process includes steps 1: pre-quenching and tempering preparation (related end-quenching value preset), 2: quenching treatment (core end-quenching value control step), 3: tempering treatment (stress relief and microstructure stabilization), 4: post-quenching and tempering quality verification (related end-quenching value feedback), and 5: finished product identification and archiving. This process achieves a balance between hardenability and quenching cracking risk, reducing the scrap rate through "precise control of Ti element + synergistic optimization of main alloy composition." It avoids excessive hardenability caused by excessive main alloy composition and refines grains and improves hardenability through Ti element, reducing the quenching cracking rate from 16.8% to below 3%. Out of 925 steering knuckles, only 30 were scrapped due to quenching cracking (cracking rate 3.25%). Furthermore, by reducing the stirring frequency (from 20Hz to 18Hz), the cracking rate in subsequent batches was further reduced to around 1%, completely solving the problem of "hardenability versus cracking." The core contradiction.

The invention relates to the technical field of abraded roller repair, and discloses a grinding roller abrasion welding repair method which comprises the following steps: a pretreatment step: carrying out surface processing on a grinding roller matrix to remove a fatigue layer and an oxide skin, controlling the processing allowance to be 20-40mm, and then carrying out sand blasting or grinding treatment to clean the surface; the defects of the matrix are detected by adopting a nondestructive inspection technology; in the preheating step, gradient preheating is conducted on the treated grinding roller base body, the preheating temperature is controlled to range from 150 DEG C to 400 DEG C, and an infrared thermometer is used for dynamic monitoring to ensure uniform preheating; stress relief: performing dynamic stress relief treatment in the surfacing process or after surfacing; stress relief heat treatment is carried out on the grinding roller subjected to surfacing, then machining is carried out to reach the specified size, air cooling is carried out to reach the room temperature, remarkable structural stress and deformation cannot be caused, the treatment efficiency and the quality stability are both considered, and finally the overall size precision and performance uniformity of the grinding roller are guaranteed.

A collision-resistant pressure vessel steel for storing and transporting boron trifluoride, comprising the following components (wt%): C: 0.10–0.20%, Si: 0.20–0.40%, Mn: 1.25–1.70%, Al: 0.025–0.045%, P≤0.015%, S≤0.005%, V: 0.010–0.025%, Nb: 0.014–0.035%. The process involves: smelting, casting into a billet, heating the billet, rough rolling, finish rolling, cooling, normalizing, and stress relief. The static yield strength Rel of this invention is 350–430 MPa, and the dynamic yield strength Re is 470–675 MPa; the tensile strength is 510–580 MPa; the yield-to-tensile ratio is ≤0.85; and the static elongation after fracture A is 25–41% and the dynamic elongation after fracture A... d The strength-ductility product is 15950–22320 MPa·% at 30–39.1%; the drop hammer tear (DWTT) energy is 17–20 kJ; when the impact velocity is 5–50 m / s and the impact displacement is 1.5 m, the steel plate absorbs 2.70–3.20 kJ of energy, and the ferrite grain size does not exceed 0.029 μm.

This application provides a machining method for a high-temperature alloy integral bladed disk, belonging to the technical field of integral bladed disk machining. The method includes: rough turning the profile of the integral bladed disk blank to obtain a rough-turned part; rough milling the rough-turned part to obtain a rough-milled part, during which all blank between the blades is removed, and machining allowance is left in the blade profile area; performing corrosion resistance inspection and vacuum stress-relieving heat treatment on the rough-milled part, and repairing the reference of the rough-milled part; performing finish milling on the rough-milled part in the following sequence: plunge milling of the leading edge, plunge milling of the trailing edge, milling of the blade tip, layered helical milling of the blade profile area, finish milling of the flow channel, and root cleaning to obtain a finish-milled part, wherein the dimensions of the blade profile area of ​​the finish-milled part are consistent with the theoretical blade profile area of ​​the part; and finish turning the disk body area of ​​the finish-milled part. This processing method improves the product quality of high-temperature alloy integral bladed disks.

The application discloses a heat treatment method for improving the depth of a hardened layer on the surface of 40CrNi2Mo, and comprises the following steps: selecting a blank casting of 40CrNi2Mo, quenching and tempering the blank casting, heating the blank casting at 850 DEG C, keeping the temperature for 6 hours, and water cooling after discharging; heating the blank casting at 580 DEG C, keeping the temperature for 10 hours, and air cooling after discharging; rough milling the blank casting, and then stress relieving annealing, wherein the annealing temperature is 500-530 DEG C, the keeping time is 10 hours, and the blank casting is air cooled after being cooled to 200 DEG C in the furnace. The method can deepen the quenching layer depth and reduce the occurrence of quenching cracking of the part.

The invention discloses a metal plate destressing leveling machine and method, and relates to the technical field of leveling machines, the metal plate destressing leveling machine comprises a protective mounting mechanism, the protective mounting mechanism comprises a protective shell, and a mounting base is fixed to the inner wall of the protective shell; according to the device, the leveling intelligent adjusting mechanism is arranged, operation of multiple sets of first push rod motors is accurately controlled according to deformation degree data and thickness of the plates, and therefore the device is suitable for the plates with different stress states; if the corners of the plate are seriously deformed, the first push rod motor close to the corners needs to move downwards by a larger distance so as to enhance the treatment strength of the area and reduce stress residue, the pressure of different positions of the roller body can be matched with the stress state of the corresponding area through the mode, and therefore the pressure of the roller body in different positions can be matched with the stress state of the corresponding area; the roller surface in contact with a low-stress area is prevented from being worn unnecessarily, and the service life of the roller body is effectively prolonged.

According to the partition self-adaptive vibration aging control method and system for the residual stress of the steel box girder, partition processing is carried out according to the distribution characteristics of the residual stress of all parts of the steel box girder, the most suitable vibration parameters are matched for different areas, the residual stress elimination rate is remarkably increased, especially the stress elimination effect of a high-stress area is remarkably improved, and the application range of the steel box girder is widened. The function of accurately eliminating the residual stress of different areas of the steel box girder is achieved. According to the method, the vibration-impact composite treatment technology is adopted to eliminate residual stress, a deep pressure stress layer is introduced into a key welding seam area, and the anti-fatigue performance of the welding seam of the steel box girder is greatly improved. According to the method, parameter optimization is completed in a virtual environment through a digital twin-driven virtual debugging technology, so that the field debugging time is remarkably shortened; and meanwhile, due to reasonable vibration parameter setting and an efficient stress relieving effect, the vibration aging treatment time is shortened, and the overall production efficiency is greatly improved.

The present application relates to the technical field of metal casting, and particularly relates to an intelligent casting method and system based on multi-dimensional parameter detection, which comprises the following steps: monitoring the content of raw material elements at multiple points in a molten pool in real time, obtaining a composition uniformity index by calculating the ratio of the content standard deviation to an adaptively updated standard deviation threshold, and combining the raw material element deviation rate to determine whether to perform compensation; determining a flow stability index by monitoring the flow rate of a direct sprue, a cross sprue and an inner gate, and adjusting the pouring speed and pressure in coordination accordingly; and calculating a stress gradient based on the real-time collected multi-point surface stress values, and dynamically adjusting the cooling waterway to eliminate stress concentration. The present application realizes closed-loop intelligent control of multiple key parameters in the whole casting process, effectively improves the composition uniformity, flow stability and suppresses the cooling stress of the castings, thereby significantly improving the stability of the casting quality and the yield.

The invention provides a cartridge receiver and a manufacturing process method thereof. According to the cartridge receiver manufacturing process method, the position of a welding seam is designed, a welding method is selected, the sequence of the welding seam is arranged, welding deformation is controlled, and multiple times of heat treatment are adopted to thoroughly eliminate the residual stress after welding so as to achieve the use performance, and a positioning tool is designed by adopting materials with similar linear expansion coefficients, the welding deformation is controlled, and meanwhile, the positioning tool is driven to carry out stress relief treatment, so that the welding deformation is more accurately controlled within a required range. The welding technology is adopted, and the integral casting bottleneck of the large-size cartridge receiver with the outer diameter larger than 1700 mm is solved; small castings, forgings and sheet metal parts are installed and welded after being formed, so that the size precision requirement and the weight reduction requirement of large-size cartridge receiver parts can be met more easily; and in addition, the manufacturing requirements of higher-power and higher-thrust gas turbines and aero-engine casing parts are met, so that the technical progress is greatly promoted.

This invention belongs to the field of aero-engine intake and exhaust, and provides an integrated thermal structure for force transmission and flow in dual high-temperature flow channels, along with its design method. The integrated thermal structure includes an internal cavity formed by upper and lower flow channel surfaces, left and right sidewalls, and endwalls. A lattice structure is filled within the cavity as the main load-bearing framework. Air film vents are provided on both sides of the upper and lower flow channel surfaces for cooling. A hinged mounting base is used for load transfer. The flow channel surfaces, sidewalls, endwalls, and mounting base are made of high-temperature resistant metal materials, while the lattice structure is made of lightweight, high-strength materials. The entire structure is integrally formed through additive manufacturing. The design method is based on thermo-mechanical coupling simulation data under target operating conditions, driving the non-uniform distribution of the lattice and defining material partitions. This invention is applicable to dual-sided high-temperature flow channel scenarios such as variable cycle engines, eliminating the need for exposed reinforcing ribs and avoiding increased flow resistance; multi-point support of the lattice eliminates stress concentration and boundary warping; and significantly reduces weight while maintaining strength, improving cooling efficiency and structural reliability.

The present application relates to the technical field of slow wire mechanical processing, and provides a composite pipe shell high-precision shape and position tolerance processing technology, which comprises the following steps: processing a pre-hole in the composite pipe shell to release stress; measuring the coaxial degree shape and position tolerance of the composite pipe shell after pre-processing; hydrogen burning straightening of the composite pipe shell to eliminate stress; measuring the shape and position tolerance of the composite pipe shell after straightening, and recording the position change of the high and low point positions of the coaxial degree measurement on the pole shoe; and adjusting the center position of the composite pipe shell processing according to the recorded high and low point positions of the coaxial degree. Through the process mode of increasing the pre-processing inner diameter, measuring the shape and position tolerance, hydrogen burning straightening of the composite pipe shell, measuring the shape and position tolerance after straightening, and adjusting the processing center position during the composite pipe shell machining process, the composite pipe shell reaches high-precision shape and position tolerance precision, and the coaxial degree reaches Φ0.01mm.

The application provides a valve seat efficient machining process and quality control method, relates to the technical field of quality control, and comprises the following steps: selecting a suitable wear-resistant and corrosion-resistant alloy blank, removing defects through ultrasonic flaw detection, and then performing quenching and tempering treatment; integrally rough machining and stress relieving the blank after the quenching and tempering treatment, standardizing the semi-finishing parameter, accurately machining the sealing surface after the standardization, and performing precision machining on the sealing surface; after the sealing surface is qualified, performing finishing, judging whether the cutting parameter is optimized, performing final inspection, and storing the qualified products in the warehouse and separately storing the unqualified products. The application can effectively reduce deformation through flaw detection screening, quenching and tempering, and stress relieving, can improve machining consistency and efficiency through standardization of the cutting parameter, can guarantee sealing performance through closed-loop repair of the sealing surface, can greatly improve the qualified rate through parameter optimization and whole-process quality control, and realizes efficient and stable machining of the valve seat.

1. The name of the design product: stress relieving handgrip (2). 2. The use of the design product: for exercising handgrip and relaxing stress relieving. 3. The design points of the design product: in shape. 4. The picture or photo best indicating the design points: perspective view 1.

The invention relates to a composite welding method for a titanium alloy thick plate. The welding method comprises the following steps: pre-welding pretreatment: forming a welding groove in the back surface of a workpiece needing tungsten electrode inert gas shielded welding, pre-treating the surface, and additionally installing a fixing piece; a fixing piece on the front face of the workpiece is removed, local vacuum electron beam welding is conducted on a welding seam on the front face of the workpiece, and sealing cover welding on the front face of the welding seam is formed; stress is eliminated after welding, and a welding seam is detected. Two different welding modes are adopted, the welding pass number during single welding is reduced, the welding efficiency is improved, the welding period is shortened, meanwhile, the process that a backing plate is additionally arranged on the back face of an original workpiece is omitted, backing plate cutting and post-welding shape correction are not needed after welding, the welding seam quality of the obtained titanium alloy thick plate workpiece is good, and the process quality is improved.

The application discloses an anti-collision pressure container steel for storing and transporting ethane, which is characterized by the following components and wt%: C: 0.10-0.20%, Si: 0.20-0.40%, Mn: 1.58-1.80%, Al: 0.025-0.045%, P: ≤0.015%, S: ≤0.005%, V: 0.030-0.065%, and Nb: 0.025-0.045%. The application comprises the following steps: after smelting and casting into a blank, the cast blank is heated; rough rolling; finish rolling; cooling; normalizing; and stress relief. The static yield strength Rel of the steel is 420-480 MPa, the dynamic yield strength Re is 510-747 MPa, the tensile strength is 585-645 MPa, the yield strength ratio is ≤0.85, the static elongation after fracture A is 28-42%, the dynamic elongation after fracture A d The steel plate has the following properties: the static yield strength Rel is 420-480 MPa, the dynamic yield strength Re is 510-747 MPa, and the tensile strength is 585-645 MPa; the yield strength ratio is ≤0.85, the static elongation after fracture A is 27-40%, the dynamic elongation after fracture A is 27-40%, the product of strength and plasticity is 16800-26042 MPa%, the drop weight tear test (DWTT) energy is 15-19 kJ, the absorbed energy of the steel plate is 3.5-3.75 KJ when the collision speed is 5-50 m / s and the collision displacement is 1.5 m, and the ferrite grain size is ≤0.012 μm.

This invention discloses a method for producing extra-thick 15MnNi steel for supporting pressure vessels in nuclear power plant reactors, comprising the following chemical composition (wt%): C: 0.14–0.18, Si: 0.15–0.37, Mn: 1.4–1.55, P: ≤0.008, S: ≤0.003, Nb: 0.015–0.025, V: 0.014–0.020, Ni: 0.75–0.95, Cr: ≤0.20, Al: 0.020–0.030, Ti: 0.01 The carbon content is 5-0.020, with the remainder being Fe and residual elements. The carbon equivalent Ceq is ≤0.49%, and the weld crack sensitivity index Pcm is ≤0.27%. Using a 1000mm thick water-cooled ingot mold, 150-250mm thick 15MnNi steel is obtained through rolling, controlled cooling, stack cooling, and heat treatment. The difference between the tensile strength of the upper and lower quarters and the tensile strength of the upper and lower quarters in the simulated stress-relieved heat-treated state is ≤15MPa. The low-temperature impact energy at -60℃ is ≥150J, and the Z-direction performance is ≥50%. The performance is stable and reliable, fully meeting the requirements for nuclear power steel.

The invention relates to the technical field of motor iron cores, in particular to equipment for reducing the loss of an iron core turbine and an iron core production process, which comprises the following steps: step 1, blanking layered different-diameter micro riveting points; step 2, stress relief annealing; 3, carrying out local composite insulation treatment on the peripheries of the riveting points and the riveting holes; step 4, riveting; and step 5, high-permeability micro powder filling. According to the method, the short-circuit contact area and the stress concentration area between the laminations in the riveting process are reduced through the step 1, and eddy current suppression is achieved. And 2, blanking stress is eliminated, the high magnetic conductivity of the silicon steel sheet is guaranteed, and magnetic performance deterioration caused by stress is avoided. And in the step 3, a reinforced insulating layer is formed in a short-circuit high-risk area, so that short circuit between laminations at a riveting position is prevented. And step 4, realizing lamination forming and reliable connection of the iron core. And 5, the riveting gap is filled with a high-permeability material, so that the permeability loss is compensated, the permeability of the iron core is improved, and the eddy-current loss of the iron core is reduced.

The invention discloses a device for eliminating effect force during vibration of an electrolytic copper foil workpiece, which relates to the technical field of metal material processing and treatment and comprises a placing frame for supporting an electrolytic copper foil coiled material, and further comprises a base, the central bearing is located at the central position of the electrolytic copper foil coiled material and plays a role in rolling, and the electrolytic copper foil coiled material is placed on the placing frame through the central bearing; the uniform excitation mechanism is mounted at the end part of the central bearing through a special clamp, and excitation forces at different positions can be automatically adjusted through the uniform excitation mechanism according to the size of the copper foil coiled material, so that the situation that stress cannot be effectively eliminated due to unbalance of the excitation forces is avoided; and the vibration exciter is connected with the uniform vibration excitation mechanism, and vibration force is provided through the vibration exciter, so that stress elimination of the electrolytic copper foil coiled material is completed through the vibration force.

The invention relates to the technical field of metal casting, in particular to an intelligent casting method and system based on multi-dimensional parameter detection, and the method comprises the steps: monitoring the content of multi-point raw material elements in a molten pool in real time, and obtaining a component uniformity index by calculating the ratio of a content standard deviation to a self-adaptive updated standard deviation threshold value; whether putting compensation is carried out or not is decided by combining the raw material element deviation rate; the flow stability index is determined by monitoring the flow speeds of the sprue, the cross gate and the flow gate, and the pouring speed and pressure are cooperatively adjusted according to the flow stability index. The stress gradient is calculated based on multi-point surface stress values collected in real time, and the cooling water channel is dynamically adjusted to eliminate stress concentration. Closed-loop intelligent control over multiple key parameters in the whole casting process is achieved, the component uniformity and flow stability of the casting are effectively improved, cooling stress is restrained, and therefore the quality stability and the yield of the casting are remarkably improved.

This invention discloses a high-strength titanium alloy / aluminum alloy layered composite sheet, prepared by explosive bonding, heat treatment strengthening and stress-relief annealing, heat treatment microstructure regulation, and machining of titanium alloy and aluminum alloy. The preparation method includes: 1. Selecting the sheet material; 2. Full annealing heat treatment; 3. Leveling, grinding and polishing, followed by cleaning and air drying; 4. Preparing the composite blank; 5. Explosive bonding to obtain the layered composite blank. The composite sheet of this invention achieves initial bonding and interface sealing through explosive bonding, followed by heat treatment strengthening and stress-relief annealing to improve interface bonding strength and eliminate some stress. Further heat treatment microstructure regulation further improves bonding strength and eliminates stress. The composite sheet undergoes initial leveling and aluminum alloy microstructure restoration, followed by fine leveling and machining to improve surface quality, resulting in a layered composite sheet with large area, good formability, high flatness, high bonding strength, and good surface quality, suitable for electronics, aerospace, shipbuilding, and other fields.

A collision-resistant steel plate for butane pressure vessels, comprising the following components (wt%): C: 0.10–0.20%, Si: 0.20–0.45%, Mn: 1.60–1.80%, Al: 0.025–0.045%, P≤0.015%, S≤0.005%, V: 0.065–0.085%, Nb: 0.027–0.045%. The process involves: smelting, casting into a billet, heating the billet, rough rolling, finish rolling, cooling, normalizing, and stress relief. The static yield strength Rel of this invention is 460–500 MPa, and the dynamic yield strength Re is 510–760 MPa; the tensile strength is 610–700 MPa; the yield ratio is ≤0.85; and the static elongation after fracture A is 29–41% and the dynamic elongation after fracture A... d The strength-ductility product is 18995–27798 MPa·% at 28–41%; the drop hammer tear (DWTT) energy is 15–19 kJ; when the impact velocity is 5–50 m / s and the impact displacement is 1.5 m, the energy absorbed by the steel plate is 3.57–3.89 kJ, and the grain size of ferrite does not exceed 0.008 μm.