87results about "Heat treatment furnaces" patented technology

The invention relates to a high-strength steel plate which comprises the following chemical compositions according to percentages by weight: 0.26-0.35% of C, 0.15-0.50% of Si, 0.60-0.90% of Mn, 0.60-1.00% of Cr, 0.55-0.90% of Mo, 0.80-2.00% of Ni, 0.01-0.10% of Nb, 0-0.10% of V, 0.0006-0.0025% of B, 0.01-0.08% of Al, 0.003-0.06% fo Ti, the rest of Fe and inevitable impurities. A manufacturing method of the high-strength steel plate comprises the following steps of: smelting, casting, heating and rolling the steel plate, and then carrying out austenitization quenching thermal treatment on the steel plate in the temperature of 850-950 DEG C, and adopting water quenching treatment after austenitization; and finally carrying out tempering thermal treatment in the temperature of 180-300 DEG C and air cooling after tempering. The organization of the obtained steel plate is tempered martensite; the yield strength of the steel plate is greater than or equal to 1300Mpa; the tensile strength of the steel plate is greater than or equal to 1400Mpa; and the charpy impact energy, i.e. Akv (-20 DEG C) of the steel plate is greater than or equal to 30J.

A steel product for induction hardening which has a chemical composition in mass % that C: 0.3 to 0.7 %, Si: 1.1 % or less, Mn: 0.2 to 1.1 %, Mo: 0.05 to 0.6, S: 0.06 % or less, P: 0.025 % or less, Al: 0.25 % or less, Cr: 0.3 % or less and the balance: Fe and inevitable impurities, has a ferrite structure and a pearlite structure, wherein the sum of the ferrite structure and the pearlite structure accounts for 90 volume % or more of the steel product, the ferrite structure has a thickness of 30 mum or less, and a hardened layer after induction hardening has an average old austenite grain diameter of 12 mum or less. The above steel product is improved in the easiness to be machined and exhibits excellent fatigue strength, and thus is suitable for a drive shaft and a constant-velocity universal joint.

There is provided a high-tensile steel sheet containing 0.15 to 0.25 mass % of C, 0.1 to 2.0 mass % of Si, 0.10 to 1.0 mass % of Mn, 0.5 to 3.5 mass % of Cr, 0.02 mass % or less of P, 0.01 mass % or less of S and the balance being Fe and unavoidable impurities based on the total mass of the steel sheet and satisfying a content ratio of Mn/(Mn+Cr)<0.50.

The invention, belonging to mechanical device used for heating the high temperature fatigue sample, relates the three-stage split type fatigue high temperature furnace. The ring insulating brick is installed on the inner wall to form heating cavity. The up and down furnaces have the holes used for sample head restraint crossing. The furnace filament is divided into upper segment, middle segment, and lower segment which are buried in insulating brick and connected by contact point of contact point and controlled by temperature controller and collected temperature by heat electric couple. Due to adopt three stages to control temperature, the invention possesses the advantages of nicety, convenience, high heating rate, homogeneous heating, improving the service life of furnace filament and reducing experimentation cost.

The invention discloses a high-surface-quality hot-galvanized transformation induced plasticity (TRIP) steel plate and a manufacturing method thereof. The hot-galvanized TRIP steel plate is prepared from chemical components in percentage by weight as follows: 0.10%-0.15% of C, 1.20%-1.80% of Mn, less than or equal to 0.030% of P, less than or equal to 0.030% of S, 1.20%-2.40% of Als and the balance of Fe and inevitable impurities. The manufacturing method of the TRIP steel plate comprises the steps as follows: continuous casting steelmaking-hot rolling-cold rolling-continuous annealing and hot galvanizing. The structure form of the hot-galvanized TRIP steel plate prepared with the method includes ferrite, bainite, retained austenite and martensite, the grain size grade ranges from Grade 10.5 to Grade 11, the tensile strength ranges from 640 MPa to 670 MPa, the yield strength ranges from 395 MPa to 465 MPa, the ductility is higher than or equal to 30%, the strength and ductility product can be 23GPa% or above, and the plate has the high surface quality, mechanical performance and corrosion resistance.

The invention discloses a special-steel-material flexible wheel of a harmonic reducer, and a cyclic heat treatment method thereof. The cyclic heat treatment method comprises the three steps of carrying out normalizing heat treatment, rough machining and thermal refining; the isothermal annealing operation is cancelled; the normalizing heat treatment comprises the following concrete steps of feeding a forged flexible wheel workblank into a heating furnace, adjusting the normalizing induction heating temperature to range from 880 DEG C+/-20 DEG C, heating and insulating for 45min, and continuously carrying out normalizing heat treatment for two times; and the thermal refining comprises the following concrete steps of feeding a roughly machined flexible wheel workblank into the heating furnace, adjusting the quenching induction heating temperature to range from 850 DEG C+/-20 DEG C, insulating for 45min, then oil quenching, adjusting the tempering induction heating temperature to range from 560 DEG C+/-20 DEG C, insulating for 90min, and carrying out thermal refining for 1 to 3 times according to the flexible wheel grain size number requirement. The special-steel-material flexible wheel of the harmonic reducer, and the cyclic heat treatment method thereof provided by the invention have the beneficial effects that after the cyclic heat treatment method provided by the invention isadopted to treat the flexible wheel made of the special steel material (medium-carbon high-strength quenched and tempered steel), the original austenite grains of the flexible wheel can be refined andhomogenized.

The invention relates to a mobile roller-type van-type heating furnace and a hot-forming subsection strengthening technique. The mobile roller-type van-type heating furnace comprises a shell, heat preservation cotton is arranged on the inner side of the shell, and a furnace door is arranged on one side of the shell. The mobile roller-type van-type heating furnace is characterized in that the shell is divided into multiple areas through one or more isolation doors, and the upper portion of each isolation door is connected with a piston rod of a telescopic cylinder. The hot-forming subsection strengthening technique is characterized by comprising the steps that 1, a boron steel workpiece is led in a furnace chamber inside the shell through rotary rollers at room temperature; 2, the contraction cylinder descends to make the lower end of the isolation door be 5-50 mm away from the workpiece; meanwhile, the isolation door divides the furnace chamber into a hard area and a soft area, the hard area is heated to be 880-930 DEG C, and the soft area is heated to be 500-800 DEG C; 3, when the workpiece is heated to be a specified heating temperature, the workpiece is led out from the heating furnace through the rotary rollers, and hot-forming punching and cooling are conducted on the workpiece. By means of the mobile roller-type van-type heating furnace and the hot-forming subsection strengthening technique, subsection strengthening production of workpieces can be achieved.

A stainless steel strip article is disclosed. The article is formed from a corrosion resistant alloy having the following composition in weight percent, about:

The balance is iron and usual impurities. The elongated thin strip article provides a room temperature tensile strength of at least about 280 ksi in the solution treated and age hardened condition. A method of making the strip article and a method of using it to make a golf club are also disclosed.

A method of manufacturing a hollow stabilizer includes a forming step of subjecting an element pipe to a bending process, to form a product shape including bent portions, and a quenching step of quenching the element pipe subjected to the bending process. In the quenching step, a cooling process is performed by immersing the element pipe made of steel in coolant and by spraying the coolant to an outer surface of the bent portion.

The basic purpose of the present invention, being a method of manufacturing a hot press member with excellent corrosion resistance, is to provide such a method of manufacturing a hot press member with excellent liquid metal brittleness resistance in which liquid metal brittleness cracking due to zinc in a plating layer entering the steel sheet does not occur. This method of manufacturing hot press member is characterized in that a plated steel sheet is provided with a substrate steel sheet and a plating layer, the latter of which is formed on said substrate steel sheet, contains 10-25 mass% of Ni, the remainder being of Zn and unavoidable impurities, and has an adhesion amount per side of 10-90g/m2, and in that said plated steel sheet is heated to 850-950DEG C, and hot press forming is initiated when the temperature of the plated steel sheet after heating is 650-800DEG C.

The invention discloses a pair of rolling-cut type bilateral scissors and a manufacturing method thereof. The pair of rolling-cut type bilateral scissors comprises ingredients in percentage by weight as follows: 0.40%-0.65% of C, 0.15%-0.35% of Si, 0.60%-0.80% of Mn, 3.50%-6.00% of Ni, 2.5%-4.00% of Cr, 1.50%-2.50% of Mo, 2.00%-3.50% of V, smaller than or equal to 0.02% of S, smaller than or equal to 0.025% of P, larger than or equal to 4% of Cr and Mo and the balance of Fe and unavoidable impurities. The manufacturing method of the rolling-cut type bilateral scissors comprises steps as follows: smelting, ingot casting, forging, annealing, rough machining, pretreatment process (normalizing and high-temperature tempering), semifinishing, final heat treatment (quenching and tempering) and finish machining. The rolling-cut type bilateral scissors can meet the production demand of high-strength medium plates of HG980, HG108, X80 and the like, and the shearing quality and shearing tonnage of the bilateral scissors are improved.

The invention relates to the technical field of anti-deformation clamping devices, in particular to a quenching anti-deformation clamping device for a series connection type brake disc. The quenching anti-deformation clamping device comprises a motor supporting plate. A drive device is arranged at the middle portion of the upper end of the motor supporting plate. Two symmetric stand columns are connected to the two sides of the upper end of the motor supporting plate. Each compression spring is located below a corresponding pressing plate. A brake disc workpiece is placed between every two pressing plates. An oil cylinder support is arranged at the middle portion of the upper end of a top plate and provided with an oil cylinder. A flying ring is arranged at the upper end of the oil cylinder. The lower end of the oil cylinder is connected with a sliding plate. A hydraulic station is connected to one side of the upper end of the oil cylinder through an oil pipe. According to the quenching anti-deformation clamping device, a series connection type clamping manner is adopted, the occupied area is small, the structure is compact, workpiece clamping is convenient, efficiency is high, and time consumption is little; and the production efficiency is high, multiple workpieces can be quenched at the same time through one-time clamping, the work efficiency is greatly improved, meanwhile, workpiece deformation is prevented, and the quenching anti-deformation clamping device is very practical.

The present invention relates to an air conditioner. The air conditioner according to the present embodiment has a refrigeration capacity of 11 kW to 16 kW, inclusive, and uses R134a as a refrigerant circulating therein, and since a refrigerant pipe therein is made of a ductile stainless steel material having 1% or less of a delta-ferrite matrix structure with respect to the grain size area thereof, the refrigerant pipe can maintain strength and hardness as good as or better than those of a copper pipe, while also maintaining good processability.

The invention relates to an induction normalizing method for a steel rail. The method applying an induction heating technology to a normalizing process of seamless welding of a track comprises the following steps: first, carrying out medium frequency induction heating to the normalizing temperature of 840-880 DEG C and keeping the temperature for 8-10 minutes; then introducing cold water into a designed novel induction coil to water cool the induction heated steel rail, wherein the integral steel rail is cooled by water; and finally, naturally cooling the steel rail to room temperature when the temperature of the steel rail is reduced to 445-455 DEG C. Compared with the prior art, by applying induction heating to normalizing of track welding, the environmental pollution problem in the prior art is reduced, the heating speed and the heating efficiency are improved effectively, the time of the whole normalizing process is shortened greatly, and the demand of automation is easily met.

The invention provides a train wheel cryogenic treatment device. The train wheel cryogenic treatment device comprises a box body and a nozzle, the box body is internally provided with a rotating shaft, the rotating shaft can rotate in the box body, and a train wheel can be mounted on the rotating shaft; and the nozzle is arranged in the box body, communicates with a liquid nitrogen pipe outside the box body, and is opposite to the tread of the train wheel on the rotating shaft. The invention also provides a treatment method of the train wheel cryogenic treatment device. According to the trainwheel cryogenic treatment device, the train wheel is mounted on the rotating shaft, the rotating shaft rotates to drive the train wheel, liquid nitrogen enters the nozzle through the liquid nitrogen pipe, the liquid nitrogen is directly sprayed to the tread of the train wheel through the nozzle to be cooled, on one hand, the low-temperature nitrogen sprayed by the nozzle and the tread of the trainwheel are subjected to forced convection heat exchange, and on the other hand, the rest surfaces of the train wheel and the environmental low-temperature gas in a cryogenic box are subjected to convection heat exchange through the rotation of the train wheel. After the train wheel is subjected to cryogenic treatment through the device, the anti-cracking performance and the wear resistance of thewheel can be improved.

The invention relates to the field of steel rail materials, in particular to a steel rail for a high-speed railway and a manufacturing method thereof. According to the steel rail for the high-speed railway, based on the total weight of a steel billet of the steel rail for the high-speed railway, the steel billet comprises 0.40-0.60% of C, 0.15-0.35% of Si, 0.75-0.95% of Mn, and the balance Fe andinevitable impurities. The manufacturing method comprises the following steps: rolling the steel billet subjected to heat preservation treatment to obtain a waste heat steel rail, and carrying out accelerated cooling heat treatment on the head part of the waste heat steel rail, specifically, the cooling start temperature of accelerated cooling heat treatment is higher than 800 DEG C, the cooling speed is controlled to be 3-5 DEG C/s, accelerated cooling is stopped when the temperature is reduced to 390-410 DEG C, and then the steel rail is air-cooled to a room temperature. The steel rail has excellent comprehensive wear performance.

The invention relates to a device for thermal treatment after welding of a partition board of a steam turbine, the partition board comprises an inner ring, a static blade and an outer ring, special devices comprise a bolster, filler blocks, a pressure plate and screws of the pressure plate, wherein the bolster is arranged below the partition board, n screw holes are formed in the positions of the inner side of the inner ring of the partition board and the outer side of the outer ring along the circumferential direction, wherein n is a natural number; the filler blocks are arranged on the bolster and comprise the outer ring filler block and the inner ring filler block, and the outer ring filler block and the inner ring filler block are respectively positioned below the outer ring and below the inner ring of the partition board. The device can achieve the purposes of eliminating the welding stress of the partition board while fully ensuring the size of the partition board, avoid ultra-poor products, lead the primary qualified rate to be 100% and bring great economic benefits for enterprises.

This invention pertains to plastic injection mold tooling, and also large forgings, formed from a low carbon mold steel having markedly increased hardening and hardenability properties in large sections as contrasted to currently available commercial products. The above attributes are obtained together with equal or better machinability and improved mold parting line wear. When manufactured in conjunction with a double melt process, this invention can improve significantly polishing characteristics and other attributes of molded parts in tooling sets.

The invention discloses a high-efficiency spring production shaping device. The high-efficiency spring production shaping device comprises a main base, a spring heating port, a conveying mechanism, acooling device, a machining panel, a shaping main shaft, a control panel and a panel bracket; the panel bracket is of an L-shaped structure, and the grooving place at the left lower end is mounted atthe upper end of the right surface of the main base through an embedding mode; the bottom of the control panel is mounted at the upper end of the grooving place of the panel bracket through a bucklingmode; cooling water and vacuum gas are connected into the cooling device through a cooling pipe body, a gas cooling guide port and a cooling water guide port for mixing in a guide pipe to form cooling liquid; an adjusting mechanism can cooperate with a main transmission mechanism to drive a linkage mechanism and a second transmission mechanism; and finally, a steering mechanism is controlled to adjust a cooling valve to control the flow, opening and closing of the cooling liquid, so that shaped springs can be cooled, the softening deformation of the shaped springs after overheating is prevented, and the quality can be effectively guaranteed.

The invention discloses a segmented heating and cooling quenching process for a wheel body of a thrust wheel. The process comprises the following steps of 1, placing and positioning the thrust wheel, wherein the thrust wheel is grabbed through a mechanical arm and placed on a support platform in a quenching device; 2, sequentially conducting intermediate frequency, high frequency and intermediate frequency induction heating on the thrust wheel through induction coil bodies; 3, cooling the thrust wheel obtained after induction heating, wherein spray cooling implemented through water, saline water and oil is sequentially conducted on the thrust wheel obtained after induction heating. According to the thrust wheel quenching process, the water-saline water-quenching oil cooling process is adopted, so that the problems that in the prior art, the quenching speed of a thrust wheel is low, the thrust wheel is deformed and cracked, and the thrust wheel is inconsistent in hardness after being quenched; the quenching process has the advantages of being uniform in thrust wheel hardness and high in quenching efficiency.