47results about How to "Shorten heat treatment cycle" patented technology

The invention discloses an active gradient temperature field regulating and controlling system and a control method thereof. The system is composed of a temperature field monitoring system, a heating system and a control system, wherein the temperature field monitoring system is used for measuring temperature field information on an XOY plane and at the periphery of a forming region and feeding the temperature field information back to the control system after quantitatively processing the temperature field information; and the heating system is used for independently regulating subregions of a temperature field at the bottom and periphery of a forming tank in real time according to a command of the control system so as to keep the temperature field of the whole machining region constant in the machining process, keep a processed region and an unprocessed region in a reasonable temperature gradient and avoid structural member warping, deforming and cracking caused by thermal stresses. The system can also be used for directly carrying out stress relief annealing on a formed structural member or directly carrying out stress relief on the formed structural member while machining, so that the problems of warping, deforming, cracking and the like easily caused in the forming process are effectively solved, not only is the time shortened, but also energy sources are saved, meanwhile, the holding time of equipment can be effectively shortened, and the utilization ratio of the equipment can be increased.

The invention relates to a wear, corrosion and rust resistant metal pipeline. The metal pipeline is manufactured by manufacturing a wear-resistant pipeline body through centrifugal casting, carrying out the processes of quenching, high-temperature tempering, solid solution strengthening thermal treatment and double tempering and dispersion hardening thermal treatment, then electrostatically spraying a rust-resistant coating on the outer wall of the pipeline, and finally air-spraying a corrosion-resistant coating on the inner wall of the pipeline. The metal pipeline has higher hardness and wear resistance, and the corrosion-resistant coating of the metal pipeline has excellent water resistance, antifouling effect and high temperature resistance.

The invention discloses an aluminum alloy automobile wheel hub composite reinforcement technology. Trace elements (comprising Mg, Ti, B, RE and the like) are added on the basis of original alloy components to carry out a reasonable component optimization, and effective purification, crystal grain refinement, deterioration treatment and finished product heat treatment are carried out in the melting process to simultaneously guarantee the good casting performance and the better mechanical performances of the alloy. The tensile strength, the yield strength and the elongation rate of aluminum alloy wheel hub products produced through utilizing the technology reach 262MPa, 179MPa and 9% respectively, and exceed strength performance standards in the Chinese wheel hub industry, so the technology has the advantages of certain practical production meaning, heat treatment period shortening, and substantial saving of the production cost.

The invention discloses offshore mooring chain steel and a thermal treatment method for a mooring chain made of the offshore mooring chain steel. Austenitic grain refining elements in the offshore mooring chain steel comprise 0.006 to 0.024 percent of N by weight, and Al, Nb, Ti and V are precisely cooperated for use. The diameter of the offshore mooring chain is 70 to 210 mm, and a high-temperature quenching-tempering continuous thermal treatment process is adopted; and the furnace temperature of a quenching furnace is greater than 930 DEG C, the highest allowable furnace temperature is 1,150 DEG C, and tempering temperature is 590 to 690 DEG C. According to the offshore mooring chain steel, the potential of an alloy element is developed, the production period is substantially shortened, ideal tissue, substructure and performance can be obtained, and the equipment investment is reduced, so as to pursue the optimal cost performance.

The invention relates to a fabrication method of an anti-corrosive and wear-resistant pipeline for delivering minerals. The method comprises the steps that a wear-resistant pipeline body is fabricated by centrifugal casting; quenching, high temperature tempering, solid solution strengthening heat treatment and a double tempering dispersion hardening heat treatment technology are performed; an outer wall of the pipeline is coated with a water glass nano composite coating subjected to test configuration; high temperature solidifying and then cooling are performed; a high-temperature-resistant, oxidized and anti-corrosive filming inner layer is obtained; and finally an inner wall of the pipeline is coated with a wear-resistant coating. The fabricated metal pipeline has higher hardness and wear-resistant property; the anti-corrosive outer coating of the pipeline has excellent water resistance, anti-fouling effect and high-temperature-resistant property; and the anti-corrosive inner coating of the pipeline has excellent wear-resistant property.

The invention discloses a process for preparing a bronze Nb3Sn superconducting wire material. The process comprises the following steps of: drilling a hole on a high tin bronze ingot, assembling the drilled ingot with a niobium alloy rod, soldering and sealing under vacuum, and performing hot extrusion to obtain a rod blank a which serves as a tensile blank; filling the tensile blank in an annealing furnace to perform first annealing; charging a furnace chamber of the annealing furnace with high-purity argon or nitrogen; heating the furnace chamber to the temperature of between 420 and 480 DEG C at the rate of 4 to 8 DEG C/minute; preserving the heat for 30 to 90 minutes; performing forced cooling by circulating the argon or the nitrogen; discharging when the material is cooled to the temperature of between 50 and 100 DEG C; repeatedly processing the material; performing a subcomponent molding process to obtain a hexagonal subcomponent; assembling, soldering and sealing under vacuum and performing the hot extrusion to obtain a rod blank b; and performing second annealing, twisting, performing final stretching and electroplating to obtain the Nb3Sn superconducting wire material. By the process for preparing the bronze Nb3Sn superconducting wire material, the surface of an Nb alloy is improved, and the performance of a strand wire is improved.

The invention discloses a thermal treatment method of a nano-bainite bearing. The method comprises the following steps: carrying out austenitizing treatment on to-be-processed bearing parts; cooling the surfaces of the to-be-processed bearing parts to reach a first temperature in a manner of water bath; and carrying out isothermal treatment on the to-be-processed bearing parts under a second temperature to ensure that to-be-processed bearing part materials are subjected to bainite transformation, wherein the first temperature is less than a martensite start transformation temperature of the to-be-processed bearing part materials, and the second temperature is higher than the martensite start transformation temperature of the to-be-processed bearing part materials. The invention also discloses the bearing manufactured by adopting the thermal treatment method. Cooling treatment on the to-be-processed bearing parts is carried out in a water bath manner, so that a salt bath method is avoided, the cost is further reduced, and pollution to an environment is avoided.

The invention provides a heat processing apparatus used for the heat treatment of a workpiece, wherein the rod shaft part of the upper portion of a workpiece or the cup-shaped body of the lower portion of the workpiece is subjected to heat treatment by the heat processing apparatus. The heat processing apparatus comprises a temporary phase determination mechanism, a formal phase determination mechanism, a workpiece lower portion heat treatment part and a workpiece upper portion heat treatment part. The heat processing apparatus also comprises one ore more than two of the following members: a desk type conveying mechanism and a suspension bracket type conveying mechanism used for confirming the position of a workpiece or a centering abutting member; a processing component symmetrically equipped with rotary clamping mechanisms with respect to a rotary shaft; a heat treatment head for fixing a fixed base at a predetermined position and connected with a workpiece cooling water pathway; a heating coil for connecting a powered terminal and a power supply terminal and connected with the workpiece cooling water pathway; a workpiece upper portion heating unit for fixing the heating coil of the rod shaft part and the heating coil of the cylinder shaft part at different layers; a rotary cooling device for cooling a workpiece during rotation; and a locking construction for preventing the driving of a heat treatment production line when the locking of an open-close door is unlocked.

The invention relates to an abrasion-resistant metal pipeline with an internal anti-corrosion coating. An abrasion-resistant pipeline body is manufactured through centrifugal casting, and is also subjected to quenching, high-temperature tempering, solid solution strengthening thermal treatment as well as twice tempering dispersion hardening thermal treatment technology, and finally, an anti-corrosion coating is coated on the inner wall of the pipeline through air spraying. The metal pipeline has high hardness and abrasion-resistant performance; the anti-corrosion coating has excellent waterproofness, antifouling effect as well as high-temperature-resistant performance.

The invention discloses a heat treatment method for improving the low-temperature toughness of a WC6-1.7357 material. The method comprises the following steps of placing a casting and a test block in a heat treatment furnace, gradually raising the temperature of the heat treatment furnace at speed which is controlled to be less than or equal to 120 DEG C per hour, stopping raising the temperature when the temperature of the heat treatment furnace reaches 940+/-10 DEG C, and keeping the temperature of the heat treatment furnace within the range of 940+/-10 DEG C; after the casting and the test block are naturally cooled to 860+/-10 DEG C along with the heat treatment furnace after heat preservation, preserving heat for 0.5 hour, taking the casting and the test block out of the heat treatment furnace, and placing the casting and the test block in a still pool for cooling, wherein the temperature of water is ranged from 30 to 55 DEG C; placing the casting and the test block in the heat treatment furnace again for treatment within 2 hours after the steps are finished, gradually raising the temperature of the heat treatment furnace at speed which is controlled to be less than or equal to 100 DEG C per hour, preserving the heat when the temperature of the heat treatment furnace reaches 720+/-10 DEG C, and removing the casting and the test block out of the heat treatment furnace for air cooling.

The invention relates to a roll processing method suitable for improving forging penetration and shortening a heat treatment period. The method successively comprises the steps of selecting a steel ingot for blanking; forging the steel ingot to form a roll blank; carrying out heat treatment normalizing on the roll blank; roughly turning the roll blank; and carrying out semifinishing on the roll blank. A forging method and a heat treatment method in a production process are improved so that a manufactured roller is good in outer surface quality, low in inclusion content, fine in spheroidized organization grain and low in carbide level, a hardness after heat treatment is lower than a standard requirement, a user requirement is satisfied, about 40% of furnace hour is saved, energy consumptionis reduced, and cost is saved.

The invention relates to the technical field of aldehyde reduction of plates, and discloses an aldehyde reduction heat treating process which comprises the following steps: putting an artificial plateinto an aldehyde reduction heat treating kiln for heat treating; putting the artificial plate subjected to the heat treating into a health maintenance balance chamber for health maintenance, whereinthe heat treating mode adopts a preheating-heating-constant temperature multistage aldehyde reduction mode, the constant temperature is 110-130 DEG C, the constant temperature time is 1-4 hours, the preheating temperature is 50-80 DEG C, and the preheating time is 0.5-6 hours. The continuous energy-saving formaldehyde-reducing heat treating kiln comprises a preheating kiln section, a formaldehyde-reducing kiln section and a balance kiln section which are connected in sequence, a feeding port is formed in the preheating kiln section, and a discharging port is formed in the balance kiln section;the formaldehyde reduction kiln section is provided with a heat supply assembly, and an airflow conveying assembly is arranged between the balance kiln section and the preheating kiln section and used for conveying airflow of the balance kiln section to the preheating kiln section. By the adoption of the technology, the aldehyde reduction effect can be effectively achieved, meanwhile, the aldehyde reduction treating period is short, and the production efficiency is improved.

The invention belongs to the technical field of high strength alloy steel processing, in particular to a calcined processing method for a high strength alloy steel. The calcined processing method comprises the steps that a nanoscale zinc coating is electrodeposited on the surface of the alloy steel, and heating treatment is carried out in a step beam heating furnace. Compared with the prior art, the calcined processing method for the high strength alloy steel has the following advantages that a zinc coating is deposited on the surface of the alloy steel, and the heating treatment is carried out under the protective atmosphere, so that the obtained zinc coating is compact in crystallization, oxidation is avoided, and at the same time decarburization is effectively prevented; the step beam heating furnace and a muffle furnace are used for tempering, so that the process of the heat treatment is simplified, the period of the heat treatment is shortened, and the comprehensive mechanical property of the high strength alloy steel is improved.

The invention discloses a heat treatment method of a 35CrMo steel casting. The heat treatment method comprises the following steps that a, the 35CrMo steel casting is heated to 930-950 DEG C, and heatpreservation is carried out; b, the 35CrMo steel casting is discharged out of the furnace, air cooling is adopted, the 35CrMo steel casting is cooled till the temperature of the 35CrMo steel castingis reduced to 200 DEG C or below, and then the 35CrMo steel casting is naturally cooled to the room temperature in an air cooling mode; and c, the cooled 35CrMo steel casting is heated and tempered to720 DEG C, and air cooling is carried out after heat preservation; When the process is adopted for heat treatment, on the basis that the heat treatment process is reduced and the heat treatment period is shortened, the mechanical property of the obtained 35CrMo steel casting meets the standard requirement, the production cost is reduced, and the production period is shortened.