164results about How to "Optimize heat treatment process" patented technology

The invention relates to a heat treatment process for improving the stress corrosion resistance of a high-strength aluminum alloy, which comprises the following treatments on a heat-treatable high-strength aluminum alloy sequentially: solution treatment, primary quenching treatment, pre-stretching treatment, high-temperature and short-time aging treatment, secondary quenching treatment, and low-temperature aging treatment. The alloy treated by the process can achieve adequate strength and good stress corrosion resistance.

The invention discloses a production process of an ultra-crystallite cutting iron core for a split mutual inductor. The production process comprises the following steps: a, placing an ultra-crystallite belt material iron core on a winding machine for winding into an iron core, and fixing by spot welding; b, thermally heating the iron core in a gradual temperature rising way, namely, heating to 380 DEG C and preserving heat for 10-50 minutes, heating to 450 DEG C and preserving heat for 10-50 minutes, and heating to 560-600 DEG C and preserving heat for 30-60 minutes; c, rapidly cooling by adopting air cooling till the temperature of the iron core is lowered to 300 DEG C, and controlling the time period from the end of the heat preservation to a moment when the temperature of the iron core falls below 300 DEG C to be within 45 minutes; d, reshaping the iron core, loading into a mold, putting into prepared paint together for soaking in vacuum, and hardening; e, cutting the cured iron core along a symmetrical center line, ensuring the flatness and smoothness of a notch, and eliminating scattering and burrs of the iron core; and f, testing and encapsulating. The process disclosed by the invention has the advantages that the method is simple, a thermal treatment process is improved, a paint soaking step is added, a low-cost and high-performance iron core can be realized, and a very remarkable effect is achieved.

The invention provides a technique for prolonging the fatigue life of a 50CrVA plate spring. The technique includes the optimal design for the following chemical components of a 50CrVA flat spring steel: 0.49 to 0.53% of C, 0.20 to 0.30% of Si, 0.65 to 0.75% of Mn, 0.90 to 1.05% of Cr, 0.11 to 0.15% of V, 0.006 to 0.009% of Al, 0.018 to 0.020% of P, 0.016 to 0.020% of S, not greater than 0.25% of Ni, and not greater than 0.25% of Cu. The method for controlling and denaturating treatment on nonmetallic inclusion in steel comprises the following steps: (1) sealing a connector between a long nozzle of a large steel ladle and an intermediate submersed nozzle through an argon seal ring; controlling the amount of slag in tapping to 0 to 5kg/t; controlling the weight of the molten steel of the steel ladle to be not less than 7t; and controlling the molten steel level of a crystallizer to fluctuate within the scope of +/-2mm; and (2) carrying out denaturating treatment on inclusion; and adding SiCa wires at 2.1m/t through a wire feeder under a white slag condition, wherein the molten steel is at temperature of 1550 to 1580 DEG C; the parameters in heat treatment of the plate spring include quenching temperature of 1000 DEG C, tempering temperature of 500 DEG C, tensile strength of not less than 1300N/mm<2>, yield strength of not less than 1200N/mm<2>, percentage elongation after fracture of not less than 11%, and percentage reduction of area of not less than 50%.

The invention discloses a Li-W-RE high-strength heat resistant aluminum alloy material modified with C. The alloy comprises the following components by weight percent: 1.0 to 10.0 percent of Cu, 0.05 to 1.5 percent of Mn, 0.01 to 0.5 percent of Cd, 0.01 to 0.5 percent of Ti, 0.0001 to 0.15 percent of C, 0.01 to 1.0 percent of Zr, 0.1 to 3.0 percent of Li, 0.01 to 1.0 percent of W, and 0.05 to 5 percent of rare earth element and the rest is Al. Through optimally choosing alloy host element Cu, Mn and RE prescription, the invention reduces alloy quasi-solid phase temperature range and solves the problems of large hot tear tend and low product high temperature strength in the casting process, guided by high quality melt, solid solution and phase diagram theory and taking a C element as modificator. The low cost multiple microalloyed element prescription is optimally choosen. Finally, a high-strength heat resistant aluminum alloy material is developed.

The invention discloses a 12Cr2Mo1R heavy plate under critical hydrogen, which comprises, by weight, 0.12 to 0.15 percent of C, equal to less than 0.10 percent of Si, 0.50 to 0.60 percent of Mn, equal to or less than 0.008 percent of P, equal to or less than 0.005 percent of S, 2.35 to 2.50 percent of Cr, 0.95 to 1.05 percent of Mo, 0.020 to 0.045 percent of Al, 0.013 to 0.020 percent of Nb, equal to or less than 0.15 percent of Cu, equal to or less than 0.003 percent of Sb, equal to or less than 0.015 percent of Sn, equal to or less than 0.016 percent of As, equal to or less than 0.002 percent of O, equal to or less than 0.008 percent of N, equal to or less than 0.0002 percent of H, and the balance Fe as well as unavoidable impurities. The standard of 12Cr2Mo1R heavy plate under critical hydrogen defined by national standard GB 713-2008 has been improved. Constituent elements of 12Cr2Mo1R heavy plate under critical hydrogen and the proportion of the elements have also been optimized. The thickness of the obtained 12Cr2Mo1R heavy plate under critical hydrogen is within 155-170 mm, thereby increasing the thickness of the plate while ensuring the mechanical properties of the plate to be compatible with the standards for plates with a thickness of less than 150 mm defined by national standard 713-2008.

The invention provides a high-strength and high-modulus casting Mg-RE alloy and a preparation method thereof. The Mg-RE alloy comprises 2-4wt% of Nd, 1-3wt% of Li, 0.2-0.6wt% of Zn, 2-4wt% of Al, the balance of Mg and inevitable impurities, wherein the total content of Si, Fe, Cu and Ni in the impurities is smaller than 0.02wt%. The preparation method of the Mg-RE alloy includes the sequential steps of vacuum melting and heat treatment. Compared with the prior art, the preparation method has the advantages that the components of the alloy and the heat treatment process are optimized, the optimized alloy component proportion of the alloy is obtained by studying different component proportions of the alloy elements of Nd, Zn, Li and Al, and therefore compared with an existing alloy, the alloy has the better overall performance of room-temperature strength and elasticity modulus under the component proportion and the heat treatment process.

The invention relates to pre-hardening plastic die steel. The preparation method comprises the following steps: adding 0.05-0.15%V of microalloying elements into 4Cr2NiMnMo; after pleiotropic deformation, carrying out fine treatment and pre-hardening treatment, wherein the pleiotropic deformation comprises radial and axial forging deformation of the die steel and transverse and vertical pleiotropic deformation with the forging ratio greater than or equal to 8; the fine treatment comprises the following step: by taking the temperature of the forged die steel with the product thickness as a starting point, heating to 880+/-10 DEG C; and after insulating at a speed of 3min/mm, discharging and air-cooling to 70 DEG C for spheroidizing annealing, wherein the specific process comprises the following steps: quickly heating to 780+/-10 DEG C*3min/mm; and then cooling to 550 DEG C for discharging and air cooling at a speed less than or equal to 30 DEG C/h; the pre-hardening treatment comprises the following steps: heating the die steel with the product thickness from 70 DEG C to 350+/-10 DEG C; insulating at the speed of 3min/mm; then heating to 880+/-10 DEG C; then, insulating at the speed of 3min/mm; and then air-cooling to 70 DEG C and tempering.

The invention discloses an Ag-RE high-strength high-toughness aluminum alloy material and a preparation method thereof. The alloy comprises the following components in percentage by weight: 1.0 to 10.0 percent of Cu, 0.05 to 1.5 percent of Mn, 0.01 to 0.5 percent of Cd, 0.01 to 0.5 percent of Ti, 0.01 to 0.2 percent of B, 0.01 to 1.0 percent of Zr, 0.01 to 1.0 percent of Ag, 0.05 to 5 percent of RE, and the balance of Al. High-quality melt, solid solution and a phase diagram theory are taken as guidance, and by using a preferable alloy main element formula of Cu, Mn and RE, the quasi solid temperature range of the alloy is reduced, and the problems of large hot tearing tendency in the casting process, low high-temperature strength of products and the like are solved; by using a preferable multielement microalloying element formula, material foundation conditions are created for the cultivation of a strengthening phase in the solid solution and grain refining effect; and the high-strength high-toughness aluminum alloy material is finally manufactured by optimizing smelting and thermal treatment process technology.

The invention relates to a forecasting method of inner and outer wall temperature difference of a 9% Cr martensitic steel thick wall pipeline in heat treatment. The method comprises the following steps of: calculating to obtain inner and outer wall temperature difference data of T groups of pipelines with different dimensions in postweld heat treatment under the conditions of different heating widths, different temperature preservation widths, and different heat treatment environment temperatures and different temperature control temperatures; establishing a neural network based on an error back propagation by comprehensively considering the influence of the pipeline dimensions, the heating widths, the temperature preservation widths, the heat treatment environment temperatures and the temperature control temperatures on the inner and outer temperature difference in postweld heat treatment and training and testing the neural network; and finally, amending by combining the actual tested data to obtain a method for forecasting the inner and outer wall temperature difference of the 9% Cr novel martensitic heat-resistant steel thick wall pipeline in postweld heat treatment. The forecasting method can rapidly calculate the inner and outer wall temperature difference, can help for instructing and optimizing the heat treatment technology, and can improve the heat treatment quality.

The invention discloses a high-strength heat-resistance aluminum alloy material and a preparation method thereof. The alloy material comprises the components in percentage by weight: 1.0-10.0% of Cu, 0.05-1.5% of Mn, 0.01-0.5% of Cd, 0.01-0.5% of Ti, 0.01-0.2% of B, 0.01-1.0% of Zr, 0.01-2.3% of Ni, 0.05-5% of RE and the balance of Al. By adopting high-quality melt and solid solution and phase diagram principle as guide and preferably choosing alloy main elements Cu, Mn and RE formula, the invention reduces alloy standard solid phase temperature range and solves the problems of large hot crack tendency, low high-temperature strength of products and the like in casting; in addition, by preferably choosing low-cost multielement microalloying element formula, the invention creates material condition for culturing and grain refining of medium-high and strengthening phases of the solid solution; and moreover, by optimizing the melting and heating processing technology, the invention realize sufficient culturing and full play of grain refining of the medium-high and strengthening phases of the solid solution so as to finally prepare the high-strength heat-resistance aluminum alloy material.

The invention discloses a large-thickness 14Cr1MoR steel plate and a production method thereof. The large-thickness 14Cr1MoR steel plate comprises the following chemical components in percentage by mass: 0.12-0.14% of C, 0.5-0.6% of Si, 0.40-0.50% of Mn, 0.006-0.007% of P, equal to or less than 0.005% of S, 1.3-1.5% of Cr, 0.58-0.60% of Mo, 0.10-0.20% of Ni, equal to or less than 0.05% of Nb, equal to or less than 0.20% of Cu, equal to or less than 0.003% of Sb, equal to or less than 0.010% of Sn, equal to or less than 0.010% of As and the balance of Fe and unavoidable impurities. The production method comprises the procedures of smelting, continuous casting, heating, rolling and thermal treatment. According to the production method, the two-stage rolling control technology and the thermaltreatment technology of normalizing and tempering are adopted to solve the problems that the crystal particles are thick, non-uniform, lower in impact toughness and higher in hardness, and the head performance and the tail performance of the steel plate differ widely.

The invention discloses a Sc-Ni-RE high-strength heat-resistant aluminium alloy material and a preparation method thereof. The Sc-Ni-RE high-strength heat-resistant aluminium alloy material comprises the components in percent by weight: 1.0-10.0 percent of Cu, 0.05-1.5 percent of Mn, 0.01-0.5 percent of Cd, 0.01-0.5 percent of Ti, 0.01-0.2 percent of B, 0.01-1.0 percent of Zr, 0.01-1.0 percent ofNi, 0.01-1.0 percent of Sc, 0.05-5 percent of RE and the balance of Al. With an excellent-quality melt, a solid solution and a phase diagram theory as guidance and through preferably selecting alloy principal elements of Cu, Mn and RE, the invention reduces the alloy quasi solid phase temperature range and solves the problems of large heat cracking tendency, low high-temperature strength of the product, and the like during the casting; and preferably, a multielement microalloying element formula is selected, the material base condition is created for carrying out culturing and grain refining on a high-temperature phase and a strengthening phase in the solid solution, and a high-strength heat-resistant aluminium alloy material is finally developed.

The invention relates to a composite material, and particularly relates to a silicon carbide-enhanced iron/aluminum composite material and a preparation method thereof. The composite material comprises a silicon carbide reinforcement and an iron/aluminum alloy matrix, wherein the reinforcement accounts for 0.1-1% of total mass; the balance is the iron/aluminum alloy matrix; and the silicon carbide reinforcement is SiC particle and is 1-5nm in particle size. The preparation method comprises the following processes: burdening; preprocessing the silicon carbide reinforcement; smelting; homogenizing annealing; forging; carrying out hot rolling; carrying out wire drawing; and carrying out thermal treatment. The material product prepared by the method has good high-temperature strength and inoxidizability, and low coefficient of thermal expansion, the defects in the prior art are overcome, and the composite material has a good industrial application prospect.

The invention relates to a boron-carbide-reinforced wear-resistant bainite ductile iron grinding ball and a manufacturing method thereof. The invention is characterized in that the grinding ball comprises the following chemical components in percentage by mass: 3.35-3.65% of C, 2.50-2.90 of Si, 2.65-3.20 of Mn, 0.65-0.90 of Cr, 0.25-0.35 of B, 0.03-0.06 of Mg, 0.03-0.05 of Y, 0.05-0.09 of Bi, 0.08-0.12 of Ti, 0.03-0.08 of Al, 0.03-0.05 of Sb, at most 0.08 of P, at most 0.025 of S, and the balance of Fe and inevitable impurities. After being subjected to electric-furnace smelting, metal mold casting and water glass water solution quenching, the grinding ball has the characteristics of high hardness, favorable toughness, low crashing ratio, low abrasion and the like.

The invention discloses a wear-resistant vanadium-titanium gear and a preparation method thereof. The wear-resistant vanadium-titanium gear is composed of the following components in percentage by weight: 0.18-0.33% of carbon, 2.3-3.8% of chromium, 0.3-0.5% of manganese, 0.17-0.25% of silicon, 3.8-4.2% of nickel, 1.0-1.8% of tungsten, 1.10-2.15% of vanadium, 1.48-2.57% of titanium, 0.21-0.34% of copper, 1.3-2.1% of molybdenum, 0.18-0.32% of rare earth, 0.0018-0.0041% of boron, at most 0.035% of sulfur and phosphorus, and the balance of iron and inevitable impurities. The method comprises the following steps: preheating treatment, isothermal annealing treatment, primary quenching, primary tempering, carburizing treatment, high-temperature tempering, secondary quenching, secondary tempering and shot blasting. The finally obtained gear has the advantages of high mechanical properties (wear resistance, fatigue resistance, hardness and the like), favorable comprehensive properties and longer service life, and is especially suitable for the high-speed heavy-load high-impact-force occasions with the gear module of greater than 6.

The invention discloses a heat treatment technique for an additive component. The heat treatment technique for the additive component is used for improving the overall mechanical performance index of the additive component. The heat treatment technique for the additive component comprises the following steps of annealing, specifically, annealing treatment is conducted on the additive component; and quenching, specifically, quenching treatment is conducted on the annealed additive component twice, low-temperature quenching is conducted on the additive component firstly, and then high-temperature quenching is conducted on the additive component. By adoption of the heat treatment technique, the overall mechanical performance index of the additive component can be improved, and the using requirements in the aviation field are met.

The invention discloses an Ag-Mo-RE high-strength heat-resisting aluminum alloy material and a preparation method thereof. The Ag-Mo-RE high-strength heat-resisting aluminum alloy material comprises the following components in percent by weight: 1.0-10.0 percent of Cu, 0.05-1.5 percent of Mn, 0.01-0.5 percent of Cd, 0.01-0.5 percent of Ti, 0.01-0.2 percent of B, 0.01-1.0 percent of Zr, 0.01-1.0 percent of Mo, 0.01-1.0 percent of Ag, 0.05-5 percent of RE and the balance of Al. With an excellent-quality melt, a solid solution and a phase diagram theory as guidance and through preferably selecting alloy principal elements of Cu, Mn and RE, the invention reduces the alloy quasi solid phase temperature range and solves the problems of large heat cracking tendency, low high-temperature strength of the product, and the like during the casting; and preferably, a multielement microalloying element formula is selected, the material base condition is created for carrying out culturing and grain refining on a high-temperature phase and a strengthening phase in the solid solution, and a high-strength heat-resistant aluminium alloy material is finally developed.

The invention discloses a processing method for increasing the bamboo durability. The processing method comprises the following steps of (S1) putting bamboos in saline water so as to be cooked, and taking out so as to clean and air; (S2) performing microwave treatment on materials obtained in the step (S1); (S3) dipping materials obtained in the step (S2) in impregnation liquid, and draining off so as to obtain a material A; and (S4) performing heat treatment on the material A, and then cleaning. According to the processing method for increasing the bamboo durability, the processing technique is optimized, so that the anti-cracking and mothproof performance of bamboo products is effectively improved, and the service life of the bamboo products is effectively prolonged.

The invention discloses a high-strength heat-resistant aluminium alloy material and a preparation method thereof. The aluminium alloy material comprises the following components by weight: 1.0-10.0% of Cu, 0.05-1.5% of Mn, 0.01-0.5% of Cd, 0.01-0.5% of Ti, 0.0001-0.15% of C, 0.01-1.0% of Zr, 0.001-0.1% of Be, 0.05-5% of RE and the balance Al. The invention finally develops the high-strength heat-resistant aluminium alloy material by taking the high-quality melt, solid solution and phase diagram theory as the guidance, taking C as the efficient modifier, giving preference to the main alloying elements Cu, Mn and RE as formulas, reducing the temperature range of the quasi-solid phase of the alloys, solving the problems of great hot cracking tendency, low high temperature strength of the products and the like during casting and giving preference to multiple microalloying elements with low cost as formulas to create basic material conditions for cultivation and grain refining functions ofthe high temperature phase and strengthening phase in the solid solution.

The invention provides a device for machining thin-walled gear ring broaching. The device for machining the thin-walled gear ring broaching comprises a thin-walled gear ring fixation part and a connection fixation block which connects a thin-walled gear ring fixation device and an operation platform. The thin-walled gear ring fixation part is of a cylindrical structure and an upper groove matched with a thin-walled gear ring is formed in the thin-walled gear ring fixation part. The depth of the upper groove is larger than the thickness of the thin-walled gear ring to be machined. A groove is formed in the bottom. The upper portion of the connection fixation block of the operation platform is provided with a protruding portion matched with the bottom of the thin-walled gear ring fixation part. The connection fixation block further comprises a through hole. By means of the technical scheme, the problems of the thin-walled gear ring that deformation is excessively large in a broaching process, plastic deformation is caused and broaching taper is caused by plastic deformation are solved, broaching stress and production of taper can be effectively controlled, and the subsequent heat processing technology is more convenient to perform. Meanwhile, the device for machining the thin-walled gear ring broaching has the advantages of being simple in structure, convenient to maintain, low in machining cost and the like.

The invention discloses an Ag-Cr-RE high-strength heat-resistant aluminium alloy material with C as a modifier and a preparation method thereof. The aluminium alloy material comprises the following components by weight: 1.0-10.0% of Cu, 0.05-1.5% of Mn, 0.01-0.5% of Cd, 0.01-0.5% of Ti, 0.0001-0.15% of C, 0.01-1.0% of Zr, 0.01-1.0% of Ag, 0.01-1.0% of Cr, 0.05-5% of RE and the balance Al. The invention finally develops the high-strength heat-resistant aluminium alloy material by taking the high-quality melt, solid solution and phase diagram theory as the guidance, giving preference to the main alloying elements Cu, Mn and RE as formulas, reducing the temperature range of the quasi-solid phase of the alloys, taking C as the efficient modifier, solving the problems of great hot cracking tendency, low high temperature strength of the products and the like during casting and giving preference to multiple microalloying elements as formulas.

The invention discloses a high-strength low-abrasion abrasion-resisting ball used for a ball mill and a preparation method of the high-strength low-abrasion abrasion-resisting ball. The high-strengthlow-abrasion abrasion-resisting ball used for the ball mill comprises a cladding layer and an abrasion-resisting ball base body, and the abrasion-resisting ball base body comprises the following components of C, B, Ti, Mg, Si, W, Cr, Mn, Ni, V, Zr, Nb, Mo, Ce, Nd, Sm, Er and the balance Fe and inevitable impurities. According to the high-strength low-abrasion abrasion-resisting ball used for the ball mill and the preparation method of the high-strength low-abrasion abrasion-resisting ball, through optimization of the matching ratio and a preparation technology, the high-strength low-abrasion abrasion-resisting ball has the advantages of being large in impact toughness, good in corrosion resistance, large in strength, small in abrasion and the like, and the working efficiency of the abrasion-resisting ball is effectively improved.

The invention discloses a corrosion resisting low-abrasion coating abrasion-resisting ball for a ball mill and a preparation method of the corrosion resisting low-abrasion coating abrasion-resisting ball. The corrosion resisting low-abrasion coating abrasion-resisting ball for the ball mill is composed of an abrasion-resisting ball base body and a coating wrapping the surface of the abrasion-resisting ball base body. The abrasion-resisting ball base body comprises the following components: C, B, Mg, Al, Si, Mn, Cr, Zr, Mo, Ni, V, Ti, Nb, Ce, Y and the balance Fe and unavoidable impurities. Coating raw materials include nano ceramic powder, nickel powder and manganese powder. According to the corrosion resisting low-abrasion coating abrasion-resisting ball for the ball mill and the preparation method of the corrosion resisting low-abrasion coating abrasion-resisting ball, by optimizing a formula and a preparation process, the obtained product is good in corrosion resistance and mechanical performance, low in abrasion and long in service life.

The invention discloses a surface-modified silicon-carbon composite material and a preparation method and application thereof. The preparation method comprises the following steps: purifying commercial coarse silicon, enabling the purified commercial coarse silicon to react with magnesium to obtain a magnesium-silicon alloy, carrying out thermal decomposition of the magnesium-silicon alloy to obtain nano-silicon, carrying out in-situ carbon coating to obtain a silicon-carbon nano-material, and compounding the nano-silicon carbon with fluoride through ball milling to obtain a silicon-based composite material. Compared with the prior art, the method provided by the invention is low in energy consumption, low in cost, short in period and beneficial to large-scale production. According to themethod, the volume change of silicon in the lithiation/delithiation process can be buffered, and the contact between silicon particles and the electrolyte can be prevented, so that the silicon is prevented from being corroded by the electrolyte, and the diffusion of lithium ions from the liquid electrolyte to the silicon particles is not influenced. The prepared surface fluoride modified silicon-carbon composite material is high in capacity, is high in initial coulombic efficiency, and is excellent in cycle performance.