55 results about "Ausforming" patented technology

The invention discloses a thermomechanical treatment method for an Al-Mg-Si alloy rolled plate, and relates to the technical field of aluminum alloys, and the thermomechanical treatment method comprises the following working procedures of fusion casting, head and tail cutting, surface milling, homogenizing heat treatment, temperature-controlled rolling, solid solution quenching and pre-aging treatment, and after a cast ingot obtained by fusion casting of an aluminum alloy raw material is subjected to head and tail cutting and surface milling, the Al-Mg-Si alloy rolled plate is obtained; and after homogenization heat treatment is conducted, temperature control rolling is directly conducted through waste heat, quenching and pre-aging treatment are conducted after temperature control rolling is completed, and the alloy rolled plate is obtained. According to the method, the purposes of saving energy, simplifying the process flow and improving the production efficiency are achieved, the microstructure of a cast ingot can be regulated and controlled, crystal grains are refined, wrong distribution is improved, the strength of a rolled plate is further improved, the problem that mechanical properties are unstable is solved, and the generation of a rib line is avoided.

The invention relates to the technical field of copper-iron alloys, and discloses a preparation method of a high-strength, high-conductivity and high-temperature-resistant powder metallurgy copper-iron alloy, which comprises the following steps: S1, preparing copper-aluminum alloy powder through an atomization method, and then preparing dispersion-strengthened copper alloy powder through internal oxidation and reduction treatment; s2, mechanical alloying composite powder is prepared through ball milling; s3, the prepared powder is pressed and formed; s4, sintering and densifying the pressed and formed powder; and S5, finally carrying out thermomechanical treatment. The invention aims to provide the high-strength, high-conductivity and high-temperature-resistant powder metallurgy copper-iron alloy which is uniform and fine in iron phase distribution, fine in crystal grain, excellent in high-temperature performance and good in processability, so as to solve the problems that the copper-iron alloy prepared by the traditional casting method is segregated in component, coarse in crystal grain, poor in high-temperature performance and processability, low in cost and the like. And the problem of poor high-temperature performance caused by growth and coarsening of the initial iron particles and the deformed iron fibers at high temperature is solved, and the method has important application prospects under the high-temperature service condition in the fields of electricity and rail transit.

The invention discloses a heat treatment process for improving the obdurability of die steel, and belongs to the technical field of metal heat treatment. The invention relates to a heat treatment process for improving the toughness of die steel, which adopts a die steel material with a specific component proportion, and the die steel material comprises carbon, chromium, molybdenum, vanadium, tungsten, nickel, niobium, niobium carbide and trace boron element. By sequentially implementing austenitizing, quenching, deformation heat treatment, multi-stage subzero treatment, pulsed magnetic field assisted tempering, gradient surface hardening and nano-precipitation regulation treatment, the hardness and toughness of the die steel are remarkably improved. Particularly, through the synergistic effect of multiple advanced heat treatment means, the martensite structure is effectively refined, carbide precipitation is strengthened, the surface hardness and the core toughness are improved, the comprehensive performance of toughness and toughness is achieved, and the method is suitable for the field of high-performance injection molds and hot-working molds.

The invention discloses a thermomechanical treatment method for improving the comprehensive performance of a 6xxx aluminum alloy coiled material containing the Cu element and the aluminum alloy coiled material, and belongs to the technical field of aluminum alloy manufacturing, the method comprises the following procedures of fusion casting, homogenization heat treatment, gradient cooling rolling, solid solution quenching, low-temperature rolling and aging treatment, the production process is optimized, and the overall performance of the 6xxx aluminum alloy coiled material containing the Cu element is improved. According to the method, the distribution and the size of precipitated phases are regulated, the microstructure and the mechanical property of the aluminum alloy are improved, the excellent mechanical property is maintained while high-content copper is added, the mechanical strength and the ductility of a product are improved, the anisotropy of the material is reduced, meanwhile, the process steps are shortened, annealing and secondary cold rolling are not needed, energy consumption is reduced, and the production efficiency is improved.

The invention discloses a high-Fe-content and high-comprehensive-performance aluminum alloy and a preparation method thereof.The specific method comprises the following steps that firstly, reasonable smelting and refining processes are adopted, three different modifiers are added to conduct Fe phase modification treatment on waste aluminum materials, and the existence form of the Fe element is controlled; and carrying out homogenization heat treatment and deformation heat treatment to obtain the high-temperature-resistant alloy. Through alloy component design and machining process optimization, the characteristics of morphology, distribution and the like of the Fe-rich phase are changed, phase change of the Fe-containing phase is achieved, the interface behavior of the Fe-containing phase is regulated and controlled, then accurate control over the microstructure of the high-Fe-content aluminum alloy is achieved, and high comprehensive performance is obtained. The high-Fe-content 6XXX series aluminum alloy prepared through the method has excellent mechanical performance and corrosion resistance, the application requirement of the high-quality 6XXX series aluminum alloy can be met, and a new way is provided for high-value utilization of secondary aluminum.

The invention belongs to the technical field of copper-based alloys, and particularly relates to a preparation method of a high-strength corrosion-resistant copper alloy. The preparation method of the high-strength corrosion-resistant copper alloy comprises the following steps that copper, manganese and Ni-Cr intermediate alloy are smelted according to the composition of the designed copper alloy and then cast, a copper alloy cast ingot is obtained, the copper alloy cast ingot is subjected to thermomechanical treatment, and the mass fraction of Cr in the copper alloy is 5-7%. By adding the Ni-Cr intermediate alloy and introducing Cr, the problem that high-content Cr is difficult to directly add due to low room-temperature solid solubility of Cr in Cu can be avoided, a copper alloy ingot with high Cr content and uniformly distributed alloy elements can be obtained, and the corrosion rate of the copper alloy can be remarkably reduced by regulating and controlling the alloy components and the thermomechanical treatment process. The corrosion resistance of the copper alloy is improved, synergistic improvement of high strength and corrosion resistance of the copper alloy is achieved, and the copper alloy is expected to serve as a novel engineering material to be applied to the seawater environment.

The invention discloses a thermomechanical treatment method for improving the obdurability and the plate shape of an Al-Cu-Mg alloy plate. The thermomechanical treatment method comprises the following steps: (1) carrying out pre-stretching treatment on a deformed plate; (2) carrying out single-stage or graded solid solution heat treatment on the pre-stretched plate, wherein the final solid solution heat treatment temperature is T1; (3) cooling the plate subjected to solid solution treatment to a temperature T2 at an average cooling rate V1, and then cooling the plate from T2 to a room temperature at an average cooling rate V2; (4) the quenched plate is subjected to cold deformation treatment after being placed at the room temperature; and (5) the plate subjected to cold deformation treatment is subjected to pre-stretching treatment, and then natural aging is conducted under the room temperature condition. According to the method, the Al-Cu-Mg alloy plate is subjected to pre-stretching, solid solution heat preservation, graded controlled cooling quenching, room temperature standing, cold deformation, pre-stretching and natural aging treatment, and the Al-Cu-Mg alloy can obtain an ideal obdurability matching relation on the premise of controlling residual stress and the plate shape.

The invention discloses a thermomechanical treatment method of a 2XXX series aluminum alloy. The method comprises the following steps: placing an alloy in a heating furnace for solution treatment; the alloy is immediately subjected to water quenching to 20-25 DEG C after being discharged from the furnace, and the quenching time is less than 15 seconds; after quenching, naturally aging the alloy at room temperature for 12 hours; the alloy subjected to natural aging is placed in a heating furnace to be heated to 175 + / -10 DEG C, taken out of the heating furnace and extruded in a Bc mode for four passes; and naturally cooling the extruded alloy in air. According to the 2XXX series aluminum alloy obtained through the method, the tensile strength can reach 490 MPa, the yield strength can reach 410 MPa, the hardness can reach 171 HV, and the mechanical property is obviously improved compared with the mechanical property obtained after artificial aging. The high-temperature ECAP technology is adopted, the situation that the aluminum-copper alloy is prone to breakage during normal-temperature extrusion is avoided, the method is suitable for machining treatment of small workpieces, and the mechanical property of the alloy is effectively improved.

The invention discloses an ultrahigh-strength Al-Mg-Si-Cu alloy and a thermomechanical treatment method thereof. The alloy comprises the following components in percentage by mass: 1.2 to 2.0 percent of Mg, 1.0 to 1.5 percent of Si, 0.5 to 1.5 percent of Cu, 0.15 to 0.5 percent of Zn, 0.2 to 0.4 percent of Mn, 0.05 to 0.1 percent of Ti, 0 to 0.5 percent of Fe and the balance of Al and inevitable impurities. The density of a strengthening phase in the structure of the alloy is greater than or equal to 7.18 * 10 < 22 > / m < 3 >; the specific heat treatment comprises the following steps of (1) solid solution quenching, (2) under-aging treatment, (3) pre-deformation and (4) aging treatment, and based on the composite strengthening effect of precipitation strengthening and dislocation strengthening, the aluminum alloy plate obtains higher strength on the premise that good shaping is guaranteed; meanwhile, the time of peak aging heat treatment is shortened, and the production efficiency is improved.

The application discloses a high-strength and high-conductivity copper alloy material and a preparation method thereof. The copper alloy material adds elements such as Cr, Hf, P, Ce, Zn and Ag into copper according to the precipitation characteristics of the precipitation strengthening type copper alloy, controls the precipitation phase of the alloy, realizes the strengthening of the matrix by two kinds of nanometer strengthening phases, and improves the mechanical properties, electrical properties and softening resistance of the alloy. After traditional solid solution treatment, pre-aging treatment, pre-cooling deformation treatment and regression treatment are added, the grains of the alloy can be effectively refined, the precipitation sequence of the multiple nanometer strengthening phases can be controlled, and the strengthening effect of the precipitation strengthening phase is as much as possible retained. The high-strength and high-conductivity copper alloy material is obtained by combining the combined deformation heat treatment, and has excellent mechanical properties (more than 700 MPa) and electrical properties (more than 70% IACS).

The invention discloses a preparation method of a high-strength conductive CuNiSi alloy. The copper alloy material comprises the following components in percentage by mass: 0.50 to 2.50 percent of Ni, 0.30 to 1.50 percent of Si, 0.50 to 2.50 percent of Co, 0.03 to 0.10 percent of Y and the balance of Cu. The preparation method comprises the following steps of burdening, non-vacuum melting and casting, homogenization treatment, hot rolling, solution treatment, primary cold rolling, regression treatment, secondary cold rolling and aging treatment. The components of the material do not contain toxic elements, a novel covering agent is adopted, the CuNiSi alloy can be produced in a large scale in a non-vacuum atmospheric environment, a novel combined thermomechanical treatment process is combined, the prepared CuNiSi alloy is excellent in comprehensive performance such as hardness, strength, plasticity and electric conductivity, and the service life of the CuNiSi alloy is prolonged. The composite material can be used for manufacturing electric connectors, conductive elastic sheets and other components required in the fields of aviation, spaceflight, new energy automobiles, electric power, electronics and the like.

This invention discloses a fine-grained, high-strength, and tough deformation heat treatment method for large-section ring components, relating to the field of aluminum alloy ring components. The key technical points are: S1: raw material proportioning; S2: raw material smelting; S3: raw material impurity removal; S4: forging and ring making; S5: ring component preheating and heat preservation; S6: rolling and grain breaking; S7: first low-temperature annealing; S8: room temperature cold rolling; S9: second low-temperature annealing; S10: cyclic rolling, solution treatment, and aging treatment. This invention introduces a multi-pass deformation heat treatment coupling process involving high-temperature rolling, low-temperature intermediate annealing, room temperature cold rolling, and second low-temperature annealing, and sets up a multi-cycle rolling annealing process. This can release the rolling internal stress of large-section ring components layer by layer, continuously break up coarse grains, induce uniform dynamic recrystallization, and avoid uneven grain structure.

The invention provides an aluminum alloy ring or barrel part ring rolling manufacturing process based on shear strain superposition. The aluminum alloy ring or barrel part ring rolling manufacturing process specifically comprises the following steps that an aluminum alloy ring or barrel part is preheated; the outer side of the aluminum alloy ring or cylinder piece is heated, the inner side of the aluminum alloy ring or cylinder piece is cooled, and a temperature difference is formed between the outer side and the inner side of the ring or cylinder piece; a driving roller and a core roller are synchronously preheated according to the temperature of the outer side and the inner side of the ring or the cylinder part, and the driving roller and the core roller make contact with and are tangent to the outer side and the inner side of the ring or the cylinder part respectively; setting the linear speeds of the core roller and the driving roller, and ensuring that the linear speed ratio of the driving roller to the core roller is greater than 1; and carrying out thermomechanical treatment on the aluminum alloy ring or cylinder piece. According to the aluminum alloy ring or barrel part ring rolling manufacturing process based on shear strain superposition, the shear strain can be fully utilized in the aluminum alloy ring rolling process, so that the organization structure of the ring or barrel part is greatly improved, and high-strength and high-toughness aluminum alloy ring or barrel part ring rolling manufacturing is achieved.

The invention discloses a composite preparation process of a high-strength aluminum alloy special-shaped ring forge piece, and belongs to the technical field of metal plastic processing and heat treatment. The technology sequentially comprises the steps of multidirectional isothermal forging cogging, intermediate solution treatment, special-shaped preformed blank near-net forming, pulse current auxiliary special-shaped ring rolling and deformation heat treatment. Intermediate solution treatment is introduced to interrupt tissue inheritance, and a uniform fine-grain matrix is obtained; by means of the electroplastic effect of pulse current, efficient near-net forming of the special-shaped section is achieved at the low temperature, and grains are further refined; and finally, through combination of pre-cooling deformation and aging deformation heat treatment, synergistic improvement of strength and toughness is achieved. According to the method, the technical problems that in the preparation process of the high-strength aluminum alloy special-shaped ring forge piece, the structure is uneven, the performance anisotropy is high, special-shaped forming is difficult, and the material utilization rate is low are effectively solved, and a near-net-shape product with excellent comprehensive performance and high size precision can be stably obtained.

The invention discloses a high-strength corrosion-resistant brass alloy for an oil-gas oil pipeline and a preparation method of the high-strength corrosion-resistant brass alloy. The high-strength corrosion-resistant brass alloy for the oil-gas oil pipeline comprises the following alloy components: 55-59% of copper; 0.4 to 0.8 percent of manganese; 0.4 to 0.8 percent of nickel; 0.2 to 0.4 percent of chromium; 0.2 to 0.4 percent of cobalt and the balance of Zn. According to the method disclosed by the invention, by optimizing the component design, the prepared brass alloy has high corrosion resistance under the atmosphere of high CO2 content and high oil. According to the method, after thermomechanical treatment, solution strengthening and precipitation strengthening are utilized, so that the alloy has high strength, the safety of the oil pipeline is improved, and the service life of the oil pipeline is prolonged.

The invention relates to the technical field of heat treatment of large-diameter thick-wall forged pipes, in particular to an ultrahigh-strength and high-toughness heat treatment method for a large-diameter thick-wall forged pipe. The heat treatment process comprises the steps that S1, surface blowing cooling is immediately conducted after forging forming, heating and heat preservation are conducted after cooling, then discharging and air cooling are conducted, and heating and heat preservation are conducted twice; s2, after the pipe fitting is subjected to heating and heat preservation treatment for four times, normalizing treatment, heating and heat preservation are conducted, and then fine grain forging is conducted to improve the grain size; and finally, annealing treatment is performed. S3, after the pipe fitting is subjected to structure refining deformation heat treatment, austenitizing treatment is carried out, then quenching treatment is carried out, and tempering treatment is carried out twice; and S4, after the pipe fitting is subjected to one-time heat treatment, short-time austenitizing treatment is conducted, then quenching is conducted, and tempering treatment is conducted twice. In the aspect of mechanical properties, the yield strength is larger than or equal to 1600 MPa, the tensile strength is larger than or equal to 1800 MPa, the ductility is larger than or equal to 12.0%, the Rockwell hardness is larger than or equal to 51.0 HRC, the impact toughness Akv is larger than or equal to 60.0 J, and the-40 DEG C low-temperature impact toughness Akv is larger than or equal to 30.0 J.

The application relates to a copper target material deformation heat treatment process suitable for continuous production, characterized in that copper plates are continuously put into a -50 DEG C low-temperature holding box in sequence, the copper plates are quickly sent into a rolling mill for deep low-temperature rolling after the temperature of the copper plates is reduced to -50 DEG C, the above-mentioned temperature reduction and rolling multi-pass processes are repeated, and the total deformation of the copper plates reaches 80%; the application is suitable for industrialized continuous and rapid production, high production efficiency is obtained, the obtained target material has good uniformity and good fine-grain effect; through composite deformation, grains are broken, and then a targeted annealing process is formulated to make high-purity copper recrystallize, eliminate shear bands and coarse grains in a single deformation such as rolling, the process cost is moderate, a complex mold is not needed, and the process is a good high-purity copper target material fine-grain and structure optimization process scheme.

The invention discloses a high-strength and high-conductivity copper alloy material and a preparation method thereof, and is characterized in that elements such as Cr, Hf, P, Ce, Zn, Ag and the like are added into copper according to the precipitation characteristics of precipitation strengthened copper alloy, so that the precipitated phase of the alloy is regulated and controlled, and a matrix is strengthened by two nanoscale strengthening phases; the mechanical property, the electrical property and the softening resistance of the alloy are improved; after traditional solution treatment, pre-aging treatment, pre-cooling deformation treatment and regression treatment are added, alloy grains can be effectively refined, the precipitation sequence of multi-nanoscale strengthening phases is regulated and controlled, and the strengthening effect of the precipitation strengthening phases is reserved as much as possible. And the high-strength and high-conductivity copper alloy material is obtained through combined deformation heat treatment, and the high-strength and high-conductivity copper alloy material has the excellent mechanical property (700 MPa or above) and the excellent electrical property (70% IACS or above).

The invention relates to the technical field of metal product processing, and particularly discloses a manufacturing and production process of a laminated composite efficient stirring component. The component is prepared from a duplex stainless steel strip as a raw material through the procedures of pretreatment, stamping, stretching, bending, heat treatment, surface treatment and the like. The preparation method comprises the following steps: carrying out electrolytic polishing on a strip, and directly carrying out low-temperature plasma nitriding without cleaning; strip-shaped wires and connecting parts are punched through a multi-station progressive die, and the strip-shaped wires and the connecting parts are bent into a cage body after being gradually stretched through a plurality of groups of roller dies; and then carrying out thermomechanical treatment, carrying out direct ion implantation after micro-arc oxidation, then carrying out subzero treatment, and finally carrying out chemical nickel plating and low-temperature curing. The member can be used for industrial stirring operation and has the advantages of being good in surface quality, high in structural precision and stable in mechanical property; in addition, the preparation method disclosed by the invention has the advantages of high working procedure collaboration, capability of effectively improving the comprehensive performance of the component and coherent and controllable process.

The invention relates to a thermomechanical treatment method for improving the mechanical property of an aluminum-lithium alloy special-shaped transition cabin section, in the method, in the forging cogging stage, an isothermal low-speed deformation mode is adopted for multidirectional forging cogging, casting defects are eliminated, and a coarse crystal phase and a grain structure are refined; in the forming stage, high-temperature isothermal forming is adopted for restraining recrystallized grain growth, and meanwhile the forming load can be reduced; in-mold local cold compression is adopted after solid solution heat treatment, uniform cold deformation can be obtained through local cold compression, quenching residual stress can be reduced, and strengthened compact precipitation can be promoted. Therefore, through cooperation and regulation and control of a full-process deformation treatment process, a coarse crystal phase can be fully refined, a uniform and fine grain structure and a compact precipitation strengthening phase are obtained, and therefore the high-performance complex special-shaped transition cabin section is developed.

The invention provides an on-line combined manufacturing method and system for a green flexible seamless steel pipe, and the method comprises the following steps: a hot rolling sizing step: obtaining a hot-rolled steel pipe; an on-line temperature equalizing step: uniformly heating the steel pipe by using a stepping soaking pit furnace; an on-line cooling step: executing the tissue regulation and control of the final cooling temperature or the on-line quenching of the final cooling temperature through the multifunctional quenching machine tool; and an online heat treatment step: carrying out tempering and normalizing treatment on the steel pipe by utilizing a multifunctional heat treatment furnace which is arranged on line. The system correspondingly comprises a hot rolling unit, an online soaking pit furnace, a multifunctional quenching machine tool and a multifunctional heat treatment furnace which are sequentially arranged. Through systematic integration of the process and equipment, rolling waste heat is fully utilized for tissue regulation and heat treatment, and energy is saved by 35%-40%; the uniform-temperature furnace guarantees the performance stability of the product, and the impact energy after online deformation heat treatment can be improved by about 20%; and timely tempering is carried out after online quenching, so that the cracking risk of the steel pipe is thoroughly eliminated, and efficient, high-quality and flexible seamless steel pipe production is realized.

The invention discloses a copper alloy strip as well as a preparation method and application thereof, and the copper alloy strip comprises the following components in percentage by mass: 0.32-1.5 wt% of Ni, 0.05-0.3 wt% of P and the balance of copper and inevitable impurities. Wherein the volume percentage ratio L of the small-angle grain boundary in the strip and the volume percentage ratio H of the large-angle grain boundary in the strip meet the condition that L / H is larger than or equal to 1.5 and smaller than or equal to 2.8. According to the method, a specific deformation heat treatment process is combined, the proportion of large-angle and small-angle grain boundaries in the strip is controlled, the internal stress of the strip is reduced, the plate shape of the strip is improved, and finally the copper alloy strip which is good in stress relaxation resistance, excellent in strength and conductivity, good in plate shape and low in warping is obtained; the copper alloy strip has wide application prospects in preparation of parts such as lead frames and vapor chambers.

The invention belongs to the technical field of metallurgy, and relates to a production method of a hardening and tempering-free wear-resisting rod. The key procedures adopt the measures of converter smelting, LF furnace refining, RH vacuum treatment, continuous casting pouring and a deformation heat treatment method, and the material strength is improved through high C and Mn elements. H removal control is enhanced in the smelting process, and the superheat degree, the pulling speed and tail end electromagnetic stirring parameters are reasonably optimized in the continuous casting process to reduce casting blank macroscopic defects. In the rolling process, the structure is homogenized through high-temperature diffusion and high-pressure rolling processes, and the comprehensive performance of the material is greatly improved through a thermomechanical treatment method. The method is suitable for producing an alloy structure wear-resisting rod with the diameter phi of 20-160 mm and has the advantages that the surface hardness is high, the core part toughness is high, the surface hardness reaches 45 HRC or above, the core part U-shaped impact is 45 J or above, and the wear-resisting performance is good.

The application relates to the technical field of non-ferrous metal material processing, in particular to a high-strength and high-conductivity copper alloy containing boron and a cryogenic deformation heat treatment method thereof. The cryogenic deformation heat treatment method comprises the following steps: vacuum melting and casting and composite purification, homogenization treatment, hot rolling and quenching, three-stage cryogenic plastic deformation treatment, multi-stage cold rolling and grading aging treatment. The application adopts the process of vacuum melting and casting and composite purification, avoids oxidation by adopting vacuum melting and casting, carries out composite purification by combining ultrasonic vibration and electromagnetic stirring, refines melt grains by ultrasonic vibration, promotes FeB phase dispersion precipitation by electromagnetic stirring, and solves the problem of uneven distribution of impurities in traditional melting and casting.

The invention discloses a nitrogen-doped high-entropy alloy with excellent room-temperature and low-temperature performance, the atomic percent expression of the high-entropy alloy is (Cr20Mn24Fe30Co20Ni6) xNy, x is more than or equal to 98 and less than 100, y is more than 0 and less than or equal to 2, and the sum of x and y is 100. According to the invention, the proportion of the main element of the alloy to the nitrogen element is regulated and controlled, the Cr20Mn24Fe30Co20Ni6 with a double-phase structure is added with interstitial N atoms, the deformation temperature is regulated and controlled, the stacking fault energy of the Cr20Mn24Fe30Co20Ni6 is regulated and controlled, and the generation of deformation twin crystals and martensite phase transformation is controlled, so that the face-centered cubic single-phase alloy material is obtained and has relatively high strength and plasticity under the conditions of room temperature and low temperature, the low-temperature tensile strength is close to 1GPa, and the tensile strength is close to 1GPa. The elongation rate exceeds 60%; the preparation process is simple in thermomechanical treatment procedure, few in heat treatment procedure, easy to operate and high in preparation efficiency.

The invention relates to the technical field of metal material thermomechanical treatment, and particularly discloses a thermomechanical treatment method for improving the corrosion performance of Zr-containing high-strength aluminum alloy, which is technically characterized by comprising the following steps: firstly, carrying out low-speed heating two-stage thermomechanical treatment on a spray-formed 7055 aluminum alloy extruded plate; the specific process comprises the following steps: heating from room temperature to 450 DEG C at the speed of 140 DEG C / h, preserving heat for 3 hours, then heating to 475 DEG C at the speed of 50 DEG C / h, preserving heat for 3 hours, and carrying out water quenching; then carrying out hot rolling under the condition of 400 DEG C / 1s <-1 > to obtain a rolled plate, and carrying out solution treatment on the rolled plate at 470 DEG C / 2h; and carrying out 440 DEG C / 0.5-2 h high-temperature pre-aging treatment and 120 DEG C / 24 h peak aging treatment. The method provides a thermomechanical treatment system which enables the alloy to have high strength and excellent corrosion resistance and is suitable for industrial thick plates; the system shows better effects in the aspects of micron-scale second phase redissolution and distribution uniformity, precipitation of nano-scale Al3Zr particles and improvement of alloy grain structure uniformity.

The invention belongs to the technical field of alloy materials, and particularly relates to a high-strength erosion-corrosion-resistant copper-nickel alloy and a preparation method and application thereof. The high-strength erosion-corrosion-resistant copper-nickel alloy comprises 26%-29% of Ni element, 1%-2% of Fe element, 2%-4% of Mn element, 1.5%-2.5% of Al element, 0.3%-0.5% of Cr element, 0.6%-1% of Nb element and the balance Cu element and inevitable impurities. The copper-nickel alloy material obtained by optimizing the types and contents of elements in the nickel-copper alloy and optimizing the matched thermomechanical treatment process and aging process has excellent comprehensive performance, and particularly has relatively high strength and high-flow-rate sediment seawater erosion corrosion resistance.

The present invention belongs to the technical field of rare metal material modification, and specifically relates to a production method for improving the weld zone structure and performance of titanium materials. Imported TA1 titanium plates are selected as research objects, and the TA1 titanium plates are welded by manual tungsten inert gas arc welding. The weld of the titanium plate is subjected to thermomechanical treatment. Thus, a weld structure similar to the substrate structure is obtained. This method is beneficial to improving the weld zone structure and performance, and can effectively reduce the aspect ratio of the α phase and reduce the difference between the weld structure and the parent material structure. After thermomechanical treatment, the mechanical properties of TA1 can meet the requirements of national standards, and the peak hardness of the weld and the heat-affected zone decreases slightly with the increase of annealing temperature.

The invention belongs to the technical field of aluminum alloy heat treatment, and particularly relates to a thermomechanical treatment process for achieving continuous cold rolling of an ultra-high-strength Al-Zn-Mg-Cu alloy. The process comprises the following steps: performing high-temperature pre-aging on the alloy in the range of 300-420°C, with a holding time of 1-14 hours, a heating rate of 1-15°C / min in a heat treatment furnace, slowly cooling the alloy to below 200°C while holding the alloy, and then taking out the alloy; performing continuous cold rolling on the alloy at room temperature of 1-100°C, with a pass reduction controlled at 10%-30% and a total reduction of 70%-95%; and after cold rolling, performing a short-time high-temperature recrystallization annealing on the alloy at a temperature of 470-490°C and a holding time of 10-30 minutes. In the higher temperature stage, hard large-particle MgZn2 particles (1-3μm) are pre-precipitated. At this time, the alloy element content of the matrix is reduced, resulting in reduced deformation resistance, which can achieve continuous cold rolling. At the same time, the MgZn2 particles interact violently with the matrix during the cold deformation process, increasing the dislocation accumulation density of the matrix. Then, through short-term high-temperature recrystallization annealing, the recrystallization nucleation rate is greatly increased, achieving the purpose of alloy grain refinement.

The invention discloses a high-copper-content aluminum-silicon alloy and a thermomechanical treatment method thereof. The high-copper-content aluminum-silicon alloy comprises the following components in percentage by weight: 6.8 to 7.2 percent of Si, 2.8 to 3.2 percent of Cu, 0.45 to 0.55 percent of Mg, 0.02 to 0.04 percent of Sr, 0.02 to 0.04 percent of Ti, less than 0.15 percent of Fe and the balance of Al and inevitable impurities. The thermomechanical treatment method of solution treatment, friction stir treatment and aging treatment is adopted, the contradiction problem of second-phase overburning and eutectic silicon refining and spheroidizing of the high-copper-content aluminum-silicon alloy under the condition of a traditional heat treatment process is solved, synergistic improvement of the obdurability of the high-copper-content aluminum-silicon alloy is achieved, and the structure defects are remarkably reduced.