12results about How to "Optimize heat treatment process" patented technology

The invention provides a high-capacity hydrogen storage alloy and a preparation method thereof. According to the method, the ferrovanadium alloy serves as a base body, rare earth is adopted for refining the ferrovanadium alloy, metal elements are doped, and the heat treatment process is further optimized. The hydrogen storage alloy comprises the following elements: TiaCrb (FeV + zwt.% RE) xMy, FeV represents a vanadium-iron alloy; rE represents a rare earth element, and z represents a doping amount; m comprises at least one element of Mn, Co, Ni, Cu, Zr, Zn, Al and Mo; a, b, x and y respectively represent the number of atoms of Ti, Cr, FeV and M, a + b + x + y = 100, 10 < = a < = 60, 0 < = b < = 70, 10 < = x < = 70, 0 < = y < = 10, and 0 < = z < = 10. The maximum hydrogen absorption amount of the prepared hydrogen storage alloy is 3.3 wt% or above at the temperature of 25 DEG C and the pressure of 9 MPa; the effective hydrogen absorption amount is more than 2wt%.

The invention discloses a composite regulation and control method for improving the performance of a laser additive manufacturing high-strength aluminum alloy, and relates to the technical field of laser additive manufacturing high-strength aluminum alloy materials, micron-sized ceramic particles and micron-sized AlMgScZr alloy powder are mixed, and ceramic particle reinforced aluminum-based composite powder is prepared. According to the composite material powder, the solidification structure is regulated and controlled through the characteristics of ceramic particles, stress concentration is reduced, and meanwhile the reinforcing phase particle aggregation phenomenon is avoided. The obtained composite material is excellent in quality and few in metallurgical defects in laser forming, and the density reaches up to 99.8% or above. By combining the optimized selective laser melting and heat treatment process, the room-temperature mechanical property of the prepared composite material part is remarkably improved, the tensile strength exceeds 540 MPa, the yield strength exceeds 490 MPa, and the elongation at break exceeds 10%.

The invention relates to a Cr-Mo-containing 5.5 Ni steel plate for an LNG (Liquefied Natural Gas) storage tank and a manufacturing method of the Cr-Mo-containing 5.5 Ni steel plate. The steel plate comprises the following chemical components in percentage by mass: 0.03-0.05% of C; 0.15% to 0.30% of Si; mn: 1.20% to 1.30%; p: < = 0.005%; s: < = 0.002%; al: greater than or equal to 0.020%; the content of Ni is 5.00 to 6.00 percent; 0.30% to 0.50% of Cr and Mo; h < = 1 ppm; 0.10% or less of As + Sb + Bi + Sn + Pb; and the balance of Fe and inevitable impurities. The invention relates to a 5.5 Ni steel plate for an LNG (Liquefied Natural Gas) storage tank, in particular to a steel plate for a pressure vessel with the thickness of 5-50mm and the temperature of minus 196 DEG C. A converter is used for production, and the delivery-state mechanical properties and process properties of the obtained steel plate meet the following requirements: the tensile strength Rm of transverse and longitudinal samples of the steel plate is 690-820 MPa, the yield strength Rel is greater than or equal to 590 MPa, and the elongation A is greater than or equal to 21%; at the temperature of-196 DEG C, the impact absorption energy KV8 of the transverse and longitudinal impact sample is greater than or equal to 100J; the sample is bent at normal temperature under the condition that D is equal to 2a and b is equal to 2a, the bending angle is 180 degrees, and no crack exists.

The invention discloses LCC steel with excellent low-temperature impact toughness. The LCC steel comprises carbon, silicon, manganese, chromium, nickel, molybdenum, copper, aluminum, iron and impurities. According to the LCC steel with the excellent low-temperature impact toughness, through proper alloy element design, the toughness of steel can be improved at the low temperature, the risk of brittle fracture is reduced, the reliability of the steel in the low-temperature environment is guaranteed, the casting technology and the heat treatment technology are further optimized, and the production cost is reduced. And the low-temperature impact toughness and the brittle fracture resistance of the steel are further enhanced.

The present invention relates to the field of roller casting technology, and more specifically to an anti-stripping roller material and a heat treatment process for a high-speed wire pre-finishing mill. The chemical components of the anti-stripping roller material for a high-speed wire pre-finishing mill include: C, Si, Mn, Cr, Ni, Mo, V, W, Nb, Fe and unavoidable impurities; the heat treatment process of the roller material includes annealing and quenching and tempering, wherein the quenching and tempering steps include: a first heating and heat preservation, a second heating and heat preservation, a third heating and heat preservation, spray quenching and high-temperature tempering. The present invention adopts a new material and a high-performance roller material prepared by a new material and a heat treatment process thereof, which solves the problems of short service life and frequent spalling of raw material rollers, improves production efficiency, reduces production costs, and has a good prospect for promotion and application.

The application discloses an optimized annealing process of N07718 high-temperature alloy foil strip, which comprises the following steps: S1, unwinding, the strip is loaded into an unwinder, the strip is made flat by a straightening roller to enter an annealing furnace; S2, protective gas is filled into the annealing furnace; S3, a gradient temperature rise is carried out on a preheating zone of the annealing furnace, and the temperature of the preheating zone is 300 DEG C-500 DEG C; S4, a heating zone of the annealing furnace is kept warm, the temperature of the heating zone is 1040 DEG C-1060 DEG C, and the strip passes through the heating zone at a speed of 5 m / min-7 m / min; and S5, a fan is used to rapidly cool the strip after annealing. Compared with the prior art, the application can solve the problem of low intermediate heat treatment efficiency of the existing N07718 high-temperature alloy, and the problem of affecting production efficiency is solved.

The invention provides a method for homogenizing trace elements in copper alloy, which comprises the following steps of: selecting 0.8-1.2% of W powder, 0.5-0.8% of Cr powder, 0.2-0.4% of Zr powder, 0.15-0.3% of Ti powder and the balance of Cu powder according to mass percent to obtain mixed powder; the mixed powder is subjected to ball milling, and ball-milled powder is obtained; carrying out cold isostatic pressing on the ball-milled powder to obtain a green body; and the blank is melted, annealed and homogenized, and the homogenized copper alloy is obtained. According to the copper alloy prepared through the method, trace elements in the copper alloy are evenly distributed, the strengthening mechanism of all the elements can be effectively achieved, and the strength, hardness, thermal conductivity and electrical conductivity of the copper alloy are improved. And compared with a common homogenization treatment process, the heat treatment process can be completed in a short time, the heat treatment process is greatly optimized, and a large amount of cost is saved.

The application discloses a method for evaluating the improvement effect of a high-strength steel heat treatment process, which can quantize the relationship between the heat treatment process improvement effect and residual stress, so as to evaluate the heat treatment process effect of reducing residual stress to improve the delayed cracking performance, and is beneficial to precisely regulating and controlling the heat treatment process, and can improve the delayed cracking performance and achieve the energy-saving and carbon-reducing effect.

The invention belongs to the field of numerical simulation of heat treatment of aluminum alloy large forgings, and discloses a method for predicting the thermal deformation behavior of an alloy treated by different quenching processes. According to the method, an Arrhenius model commonly used for deformation behavior prediction in quenching simulation of aluminum alloy forgings is improved, and a modified Arrhenius constitutive model considering the quenching cooling process and deformation condition influence is provided. According to the corrected model, the thermal deformation critical activation energy is assumed to be a function influenced by the quenching cooling transformation degree, the deformation temperature and the rate according to the real situation. A quenching factor is introduced as an intermediate quantity to establish an activation energy evolution function, description of evolution characteristics of critical activation energy required by deformation of the alloy after different quenching cooling processes is realized, and finally accurate prediction of thermal deformation behaviors of the aluminum alloy under different quenching cooling processes and different deformation conditions is realized. Therefore, the prediction error of the forging heat treatment residual stress is reduced.

The utility model discloses a multifunctional furnace body volume changing mechanism, and relates to the technical field of heat treatment equipment. The furnace comprises a furnace body, a partition furnace door is arranged in the furnace body through a moving assembly, a mounting plate is arranged on the moving assembly, and a connecting assembly is further arranged between the mounting plate and the partition furnace door. The moving assembly comprises two L-shaped frames located at the front end and the rear end in the furnace body correspondingly, and threaded rods are rotationally connected into vertical supporting arms of the L-shaped frames in the vertical direction. The L-shaped frame, the movable block and the partition furnace door are mounted through the mounting plate, and the partition furnace door is driven to move in the furnace body through the L-shaped frame and the movable block, so that the volume in the furnace body is adjusted, and the problem that the volume in the furnace body is inconvenient to adjust in the prior art is solved; and meanwhile, the mounting shell and the mounting block are connected through the mounting rod, so that the mounting plate and the partition furnace door are mounted, and the problem of inconvenience in mounting and dismounting in the prior art is solved.

The invention relates to a cold-press forming and heat treatment method for a spherical composite metal plate. The method comprises the steps of cold-press forming of the spherical composite metal plate, detection after cold-press forming, charging and heat preservation of a heat treatment part, discharging and air cooling of the part, and inspection after heat treatment. The plate is subjected to annular cold pressing from the edge to the center according to preset parameters in stages, gradual uniform plastic deformation of the plate is achieved, and local stress concentration and elastic resilience are remarkably reduced. And in combination with detection after cold pressing forming, the problems that precision control is difficult and the rebound amount is large in the spherical composite metal plate machining process are fundamentally solved. And meanwhile, the heat treatment process is optimized, the residual stress of the spherical composite metal plate is fully released, and then the forming precision and the surface quality of the spherical composite metal plate subjected to heat treatment are improved.

The invention discloses a forging and heat treatment method of a ZL205A alloy forge piece, ZL205A alloy components comprise the following raw materials in percentage by weight: 5.5%-6.7% of zinc, 2.0%-2.8% of magnesium, 1.6%-2.3% of copper, 0.5%-2% of other elements and the balance of aluminum, the raw materials are prepared into a ZL205A alloy blank according to the proportion, and the ZL205A alloy blank is subjected to heat treatment. The forging and heat treatment method of the ZL205A alloy forge piece specifically comprises the following steps: a preheating stage; a forging stage; a cooling stage; heat treatment process; and quality inspection. In conclusion, the method has the beneficial effects that the microstructure uniformity is improved, the process is optimized, the mechanical property stability is improved, the corrosion resistance is enhanced, and the applicability is wide. The effects are beneficial to improving the quality and performance of the ZL205A alloy forge piece, the requirements of practical application are met, and the ZL205A alloy forge piece is widely applied to the related fields.