68results about How to "Guaranteed quenching effect" patented technology

A heat treatment method for strength of 28CrMoNiV steel capable of improving an industrial steam turbine rotor forge piece. The technology comprises the steps that (1), a normalizing and tempering manner is adopted in a preparation heat treatment technology and is used for refining crystalline grains and improving a material internal tissue, residual stress is reduced, and the good foundation is laid for conditioning heat treatment; a ladder heating manner is adopted in heating of normalizing and quenching, and fast heating is avoided; in the rising process, if the heating speed is too high, residual stress obtained after quenching is overlapped, and the problems that the defect of the forge piece is expanded, and even, the forge piece is cracked are possibly caused; in a quenching cooling process, a water quenching oil cooling manner is adopted, the cooling speed of a workpiece in the high-temperature stage is improved, and meanwhile, the cooling speed of a Martensite transition zone is reduced; in the water cooling initial stage, the workpiece vertically moves in a front-and-back manner in water, the quenching effect of the workpiece is fully ensured, and meanwhile, the structural stress and heat stress are reduced; in the medium heat treatment, the tempering temperature is properly reduced, impact toughness is ensured, and meanwhile, the strength of the force piece is improved.

The invention belongs to the technical field of aluminum alloy profiles and particularly relates to a manufacturing method for producing an aluminum alloy mechanical arm track girder hollow profile through an aluminum alloy replacing rolled steel. The manufacturing method comprises the steps that firstly, the intensity and the capacity of resistance to deformation of a steel cross beam are evaluated; secondly, the aluminum alloy is selected; thirdly, the structure of the aluminum alloy mechanical arm track girder hollow profile is designed; fourthly, the movement track and deformation of the aluminum alloy mechanical arm track girder hollow profile in a stressed state are simulated through a computer; fifthly, a mould of the aluminum alloy mechanical arm track girder hollow profile is manufactured; sixthly, the aluminum alloy mechanical arm track girder hollow profile is extruded and quenched online; seventhly, the aluminum alloy mechanical arm track girder hollow profile is aged; eighthly, the aluminum alloy mechanical arm track girder hollow profile is sampled; ninthly, the aluminum alloy mechanical arm track girder hollow profile is riveted; and tenthly, the aluminum alloy mechanical arm track girder hollow profile is packaged and delivered, and the aluminum replaces the steel to produce the aluminum alloy mechanical arm track girder hollow profile.

The invention provides high-strength bolt steel with excellent delayed fracture resistance and a preparation method thereof. The high-strength bolt steel comprises the following components in percentage by weight: 0.35-0.50% of carbon, 0.20-0.70% of manganese, 0.75-1.35% of chromium, 0.55-1.45% of molybdenum, 0.10-0.50% of vanadium, 0.005-0.10% of aluminum, 0-0.005% of sulfur, 0.02-0.05% of silicon, 0.005-0.15% of titanium, 0.0005-0.003% of oxygen, 0.001-0.007% of nitrogen, and the balance iron and other inevitable impurities; the content of titanium is not less than 3.5 times of the content of nitrogen; the sum of the contents of chromium, molybdenum and vanadium is not lower than 1.75%; and the sum of the contents of sulfur, oxygen and nitrogen is not higher than 0.01%. The high-strength bolt steel is high in purity and refined in grains, can be used for manufacturing high-strength bolts with tensile strength not lower than 1400MPa, has a section shrinkage rate not lower than 50%, is excellent in delayed fracture resistance, and can be applied to automobiles and mechanical parts.

The invention discloses a thermal treatment device and a thermal treatment technology of an ultra-long aluminum extrusion, and belongs to the technical field of material processing. The thermal treatment device comprises a heating furnace, a quenching water well, a feeding and discharge rail, a feeding trolley, a discharge trolley, a lifting device and a material basket, wherein a furnace body isan ultra-long horizontal furnace composed of a plurality of regions of which the temperature is independently controlled; and a product is horizontally stacked in the material basket, and enters the furnace body or the quenching water well through the feeding trolley, the discharge trolley and the lifting device to be subjected to thermal treatment. According to the thermal treatment device and the thermal treatment technology, horizontal furnace horizontal heating and inclined descend soaking quenching technologies are adopted to replace traditional vertical quenching and roller hearth type quenching technologies, the quenching cooling speed is high and uniform, quenching deformation of the product is low, surface quality is good, and performance is uniform; solid-solution quenching, annealing and ageing functions can be achieved, production scheduling is flexible, length of a biggest product of thermal treatment is large, charge batch is large, production efficiency and heat utilization rate are high, and operation is safe and reliable; and besides, deep well, heat-resistant roller, spraying devices, and the like are not required, basic requirements on equipment are low, and investment is low.

The invention discloses a water-soluble quenching medium for an aluminum alloy precision part and belongs to the metal heat treatment quenching agent technology. The water-soluble quenching medium comprises, by weight, 18-22% of polyalkylene glycol (with molecular weight of 8000), 0.6-1.0% of an antiseptic, a proper amount of an antifoaming agent and a settling agent, and the balance water. The water-soluble quenching medium has the advantages that 1, the problem that cold water as an aluminum alloy quenching medium has a fast cooling rate so that quenched residual stress is very large and the part can deform and crack is solved, and 2, it is solved that in hot water quenching, a cooling rate can be adjusted but quenching effects do not satisfy usage requirements. The water-soluble quenching medium can reduce an aluminum alloy initial cooling speed, has a strong cooling capability at a temperature of 440-250 DEG C, has good cooling characteristics and does not corrode a workpiece. The water-soluble quenching medium can reduce aluminum alloy part quenched residual stress, does not influence quenching effects and mechanical properties after aging and belongs to the field of metal heat treatment quenching agents.

The invention relates to a press roll for pressing a secondary battery electrode and a producing process thereof, belonging to the technical field of mechanical manufacture and electrochemical power sources. The producing process of the press roll used for pressing the secondary battery electrode comprises the following steps of: performing a molding process on raw materials, namely rare earth alloy containing carbon, molybdenum, chromium, nickel, tungsten, silicon, manganese and lanthanum series and ferrous electroslag remelting steel ingots; heating and then forging and pressing to form a press roll blank by using a hydraulic press; performing balling heat treatment, performing furnace cooling, then raising the temperature, performing homeothermy to constant temperature; and finally performing postprocessing. In the invention, an ultradeep quenching treatment method is adopted, the treatment depth ranges from 10mm to 15mm below the surface of the press roll, thereby the hardness of the press roll is increased, the strength is improved, and high-precision electrode pressing is ensured; and the press roll produced by using the method has the advantages of high hardness, high strength and good wear resistance, can be widely applied to various precision presses, saves use cost, improves product quality and increases production efficiency.

The invention belong to the technical field of aluminum alloy profile and concretely relates to a manufacturing method for slide rail hollow profile for robot arm movements with aluminum alloy replacing steel. The manufacturing method comprises first, analyzing steel connection member motion and stress conditions, second, selecting aluminum-alloy material, third, designing hollow profile, fourth, simulating aluminum profile connection member motion and stress conditions by a computer to determine whether the hollow profile meets demands, fifth, selecting an extruding machine and designing an aluminum alloy hollow profile connection member via a die, sixth, casting aluminum alloy ingot, seventh, extruding aluminum alloy hollow profile connection member and conducting online quenching, eighth, conducting aluminum alloy hollow profile connection member tension extension and aging treatment, ninth, sampling and checking the aluminum alloy hollow profile connection member, and tenth, hardening and packing the aluminum alloy hollow profile. Motion and stress conditions of the aluminum alloy hollow profile connection member can be simulated by the computer; strength and plasticity meet use requirements; and hollow profile can be manufactured in batches by the use of the method.

The invention provides an automatic quenching oil groove and a quenching method by utilizing the automatic quenching oil groove. According to the technical scheme, the automatic quenching oil groove comprises a groove body, a liquid spraying mechanism and an oil liquid circulating mechanism are arranged inside the groove body, a stand is arranged inside the groove body, a material containing mechanism is arranged on the stand, and a hoisting mechanism drives the material containing mechanism to move up and down along the stand. Automatic quenching on a workpiece is achieved, the manpower operation is lowered, the dangerousness is lowered, the efficiency is improved, and the production cost is lowered.

The invention discloses a dry quenching gas regulation method of coal internal heat low temperature pyrolysis. The method comprises: performing tar separation and collection to gas which is generated from a pyrolysis segment through pyrolysis, returning a part of cool purified gas to a quenching segment, allowing heat transfer to be carried out between hot semi-coke in the quenching segment and the part of cool purified gas to reduce the temperature of semi-coke to a non-reignition temperature, and discharging the hot gas; leading the hot gas after heat transfer from the quenching segment to the pyrolysis segment; leading a combustion-supporting gas from micropores of a lattice wall or a gas distribution channel to the pyrolysis segment, allowing the combustion-supporting gas to meet the hot gas for combustion; and mixing high-temperature gas produced from combustion with uncombusted hot gas to form high-temperature mixed gas meeting the temperature and flow of low temperature pyrolysis requirements, and performing heat transfer between the high-temperature mixed gas and coal in the pyrolysis segment so as to carry out coal pyrolysis. According to the method, in a situation that the circulating gas amount in the pyrolysis segment is basically kept constant, the gas circulating amount in the quenching segment is further increased, so that the quenching effect is ensued, and the physical heat of semi-coke can be fully used, and therefore, the energy saving effect is good. According to the method, since no dependent combustor, combustion gas blower fan, pipeline or valve is required, so that the system is further simplified.

The invention belongs to the technical field of iron and steel production, and particularly relates to a safety guard device for iron and steel production. The safety guard device for iron and steel production comprises a liquid containing pool. The interior of the liquid containing pool is provided with a liquid containing chamber. Squeezing liquid is filled in the liquid containing chamber. Theliquid containing chamber is provided with a squeezing mechanism. One end of the squeezing mechanism penetrates through the center of the inner bottom of the liquid containing pool and extends to theinterior of the liquid containing pool. A mounting sink is arranged around the inner lateral side of the liquid containing pool, and the mounting sink is in the shape of a rectangular. The bottom of the mounting sink is communicated with the liquid containing chamber. The interior of the mounting sink is provided with a protecting mechanism. The outer lateral side of the liquid containing pool isfixedly connected with a cooling and returning mechanism. The cooling and returning mechanism is communicated with the liquid containing chamber. The safety guard device for iron and steel productionhas the advantages that during quenching operation of large metal castings, a protecting plate can be lifted automatically to make high-temperature fireballs or liquid splash into the surrounding environment without affecting the direct observation of a worker outside, which effectively improves the protection of personal safety.

The invention discloses a quenching device for machining of cement production equipment. The quenching device comprises a box body, wherein one side of the bottom of the inner wall of the box body is fixedly connected with a first motor; the output shaft end of the first motor is connected with a synchronous wheel through a gear in a meshing manner; the top of a vertical plate in the box body is connected with a roller in a rotatable manner; the roller is connected with the synchronous wheel through a synchronous belt; the surface of the roller is connected with a conveying belt in a transmission manner; the middle part of the bottom of the inner wall of the box body is vertically and fixedly connected with a pair of fixed plates; a sliding plate is connected between the fixed plates in a sliding manner; the bottom of the inner wall of the box body is fixedly connected with a second motor through a motor seat; a sliding rod is fixedly connected between two sides of the inner wall of the box body; and the surface of the sliding rod is connected with a quenching device body in a sliding manner. The invention relates to the technical field of machining of the cement production equipment. According to the quenching device for machining of the cement production equipment, the problems of long time and high labor intensity of a conventional quenching process are solved; meanwhile, the production efficiency is improved, and the labor intensity is reduced; and the quenching device is convenient to operate.

The invention relates to a controllable gas-assisted light alloy metal plate cold mold hot forming method. An adopted forming die comprises a female die, a male die and a blank pressing flange. The forming method comprises the steps of design and manufacturing of the forming die, light alloy solution treatment, light alloy cold die hot forming and light alloy part die assembly quenching. Aiming at the characteristics of heat exchange and non-uniform temperature field between a cold mold hot forming die and a plate blank, a cooling gas path is constructed on the forming die, and a controllable gas assisting manner is utilized, so that 1) in the forming process, the temperature field of the plate blank is regulated and controlled, the reasonable distribution of flow stress is realized, and the flow of a material is further controlled; and 2) in the die quenching process, the local cooling speed of a deformed part is regulated and controlled, controllable and adjustable gradient cooling is achieved, and then the structure and mechanical properties of the part are guaranteed. An advanced die manufacturing method is provided for hot forming of light alloy complex integral parts, and the problems of cracking and uneven performance and wall thickness distribution existing in hot forming of light alloy are solved.

The invention relates to an electric tool processing device, which comprises a processing tank, a quenching platform arranged in the tank, a plurality of placing plates arranged on the quenching platform, and a heating unit and a cooling unit arranged in the processing tank and sequentially distributed along the quenching platform. Each placing plate is driven by a drive motor to linkage through asynchronous belt; a groove is formed in the upper end of each placing plate; elastic limiting bulges are further arranged on inner walls of the grooves of the placing plates; a heat resisting clapboard is further arranged between the heating unit and the cooling unit; the cooling unit comprises a cooling installation plate; a pair of cooling nozzles are arranged on the cooling installation plate;and a cooling liquid recovery plate is further arranged in the processing tank. The electric tool processing device provided by the invention has the advantages that through interaction of the quenching platform, the placing plate group, the heating unit and the cooling unit, materials can be loaded, heated and cooled synchronously, cycle operation is carried out, processing can be carried out conveniently, and batch production is realized.

The embodiment of the invention discloses a preparing method of a zirconium alloy hot rolled plate. The method comprises the steps that zirconium alloy casting ingots with the preset size and the preset weight are subjected to heat preservation and then subjected to forging, heat treatment, primary surface treatment, forging after heat preservation, secondary surface treatment, multi-pass hot rolling and vacuum annealing. The manufactured zirconium alloy hot rolled medium and thick plate has the excellent anti-corrosion property and mechanical property, and has the uniform and fine structure,and the plate meets the technical standard requirement of zirconium alloy medium and thick plates for a nuclear reactor. The method is simple in process, flow in preparing flow, and low in productioncost. The situation that domestic high-property zirconium alloy medium and thick plates are dependent on import for a long time can be expected to be changed.

The invention discloses a device and method for removing oil stain in high-frequency quenching liquid for a steering gear. The device comprises a fixed frame and a conveying belt which is immersed into the quenching liquid; a scraping plate for scraping oil stain on the conveying belt is arranged on the fixed frame; one end of the scraping plate for scraping the oil stain is positioned on the outer side of the conveying belt, and the other end of the scraping plate is an oil stain output end; a belt wheel at one end of the conveying belt is connected with a motor fixed on the fixed frame; a belt wheel at the other end of the conveying belt is connected with the fixed frame through a belt tightness adjusting mechanism; in the method for removing oil stain, the oil stain in the quenching liquid is removed by using the device for removing oil stain in high-frequency quenching liquid for the steering gear; through the adoption of the device and the method disclosed by the invention, the automatic removing of the oil stain in the quenching liquid is achieved, so that the labor cost is reduced and the utilization rate of the quenching liquid is increased; the purity of the quenching liquid and the quenching quality are both guaranteed.

The invention provides a processing method of an aluminum profile for a passenger vehicle. The processing method comprises the following steps: selecting an Al-Mg-Si series aluminum alloy ingot with the weight percentage of Mg being 0.5-1.1%, the weight percentage of Si being 0.4-0.8% and the weight percentage of Fe being less than 0.6% as an extrusion raw material of the aluminum profile; raw material selection and provided extrusion parameters are reasonable, during extrusion, metal flow is uniform, efficient and rapid, the machining range is wide, the aluminum profile extrusion device can be suitable for machining aluminum profiles of passenger vehicles with various sections and sizes, and the extruded aluminum profiles are fine in crystal grain, high in straightness, good in strength, stable in performance and high in rate of finished products. According to the provided combined online quenching method, accurate cooling control can be carried out according to the temperature and the structure state of the profile, quenching cooling is uniform, the quenching requirements of aluminum profiles with different thicknesses and complex section structures can be met, the cooling range is wide, the application range is wide, the cooling efficiency of some aluminum profiles not suitable for online quenching can also meet the online quenching requirement, and the service life of the aluminum profiles is prolonged. And the process of independent quenching can be omitted, so that the equipment investment is reduced, and the production cost is reduced.

The invention relates to a method for preventing a slender tubular component from burning in oil quenching of heat treatment. A cover-shaped plug matching with a tube orifice diameter of the slender tubular component is provided. An oil-leaking hole is arranged at the bottom of the plug. Before the component is subjected to the heat treatment, the cover-shaped plug is buckled to one end tube orifice of the component, so that the oil-leaking hole is blocked and then quenching treatment is carried out. With the above method, risks of burning can be effectively prevented; and a quenching effect of the tubular component is guaranteed, so that the component can be fully quenched rapidly.

The invention discloses a quenching process and device for low-impurity ultra-low-carbon stainless steel. The method includes the steps that: firstly, a blank is put into a heating furnace and heatedto 1060-1200 DEG C; secondly, a sliding seat at the bottom of the heating furnace is pulled out, when the sliding seat is pulled out, the two sides of the bottom of the blank slide to the two sides ofa hanging basket, and thus the hanging basket can lift the blank; thirdly, the hanging basket is lifted through a crane, and in the process of lifting the hanging basket, the blank can be lifted by the hanging basket and thus be separated from the sliding seat of the heating furnace; fourthly, the blank is moved to the position above a quenching bath through the hanging basket, and then lowered,so that the high-temperature blank is put into quenching oil in the quenching bath, and the blank is completely submerged in the quenching oil for quenching; fifthly, the initial temperature of the quenching oil is 80-130 DEG C; and sixthly, quenching is conducted for 1 to 3 minutes and then completed. Through the quenching process and device, the product performance is improved, and potential safety hazards are reduced.