336results about How to "Improve heat treatment efficiency" patented technology

The invention discloses a processing method of a high precision steel ball. The processing method comprises the following steps: cold heading forming; annealing; ball polishing; primary soft grinding; primary hot pickling for appearance; secondary soft grinding; primary heat treatment; hard grinding; secondary cold pickling for appearance; removal of a corrosion layer; primary stabilizing; strengthening treatment; primary grinding; secondary stabilizing; lapping; appearance selection; super-lapping; secondary heat treatment; oil washing; detection. The processing method of a high precision steel ball provided by the invention shortens the whole quenching and heat treatment time during processing by 50% or more, greatly improves heat treatment efficiency, greatly improves the spheroidization rate, hardness and strength properties of the processed steel ball compared with the steel ball with long quenching and heat treatment time, prolongs service life, satisfies relatively high quality requirements on the steel balls of the roller industry, not only reduces labor intensity, manual input and production cost, but also ensures the quality of products, and increases the added value of the products.

The invention relates to a semi-steel roll and a preparation method thereof, belonging to the technical field of steel rolling. The semi-steel roll contains the following chemical components according to the mass percent: 1.65-1.90 of C, 0.80-1.15 of Cr, 0.35-0.65 of Si, 0.60-1.00 of Mn, 0.30-0.60 of Mo, 0.20-0.80 of Ni, 0.05-0.10 of K, 0.05-0.10 of Na, 0.05-0.15 of Ti, 0.05-0.15 of Nb, 0.08-0.15 of Y, 0.03-0.08 of Mg, 0.02-0.04 of Zn, 0.06-1.00 of Al, less than 0.04 of P, less than 0.03 of S, and the balance of Fe. The semi-steel roll has reasonable chemical component, prolonged service life, the hardness of 55-58 HS and the tensile strength of 900-950 MPa and the impact toughness of 10-12 J/cm2; the invention can save the nickel resource, reduce the cost, simplify the heat treatment, shorten the production period, improve the heat treatment efficiency, save the energy, thin the solidified organization, improve the forms and the distribution uniformity of carbides and inhibit the aliquation of alloy elements;.

The invention relates to a manufacturing method for medium-carbon cold forging steel rods and wires. The method comprises the following steps: low temperature rolling with a finish rolling temperature of 700 to 750 DEG C; rapid air cooling after rolling through cooling to 450 to 550 DEG C at a speed of no less than 0.5 DEG C/s; rapid induction heating pretreatment through heating to 730 to 750 DEG C at a speed of 5 to 15 DEG C/s and heat preservation for 2 to 3 min; and spheroidizing annealing heat treatment through heating to 760 to 780 DEG C with a furnace, heat preservation for 60 to 80 min, cooling to 680 to 710 DEG C, heat preservation for 80 to 120 min and air cooling out of the furnace. With the method provided by the invention, spheroidizing annealing heat treatment time for medium-carbon cold forging steel balls is substantially shortened by more than 50%, and heat treatment efficiency is greatly improved; obtained medium-carbon cold forging steel has at least a same balling rate and same hardness and cold forging performance compared with current medium-carbon cold forging steel annealed for a long time, and high requirements on cold forging steel in the fastener industry are satisfied.

The present invention is a vacuum heat treatment surface modification process, which includes the following steps: (1) casting the alloy first, then grinding the surface of the alloy, immersing the smooth polished alloy in a solvent for rinsing; (2) Put the alloy after rinsing into a chemical solvent tank to remove surface oil, and ultrasonically clean the alloy during the process of removing oil; (3) Send the cleaned alloy into a vacuum annealing furnace for the first heating, When the heating temperature reaches 600-650°C, keep it warm for 60-80min, then quickly cool to 300-350°C and then heat it for the second time; (4) Pre-oxidize the alloy sent out of the furnace, and then send the alloy into vacuum (5) Send the alloy into the quenching furnace to complete the quenching; (6) Send the quenched alloy into the tempering furnace, heat it to 200-230°C, and keep it warm for 1- Allow to cool naturally after 3 hours.

The invention relates to a sludge continuous-heat-treatment modification device and a technology of deep dehydrating, drying and incineration. The sludge continuous-heat-treatment modification device comprises sludge conveying tubes and heat medium spacing casing tubes, wherein the sludge conveying tubes comprises a preheating section, a reacting section and a cooling section, and the sludge conveying tubes of all the preheating section, the reacting section and the cooling section are sleeved by the heat medium spacing casing tubes; the heat medium spacing casing tube of the reacting section communicates with a heat medium heating converter to form a first heat medium circulating loop; the heat medium spacing casing tube of the preheating section communicates with the heat medium spacing casing tube of the cooling section to form a second heat medium circulating loop; and a heat medium heat recovery circulating pump is arranged in the second heat medium circulating loop. The sludge continuous-heat-treatment modification device uses a heat medium to perform indirect heat treatment on sludge and improves the dehydrating property of the sludge, therefore the sludge continuous heat treatment is realized and the recycling use of the heat medium saves more energy and is more friendly to environment at the same time.

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.

A heat treatment method for improving the yield strength of steel castings, comprising the following steps: a. heating the steel castings to an austenitizing temperature of 880°C-950°C and keeping them warm; b. heating the austenitized steel castings out of the furnace, adopt air cooling + water mist cooling or tap water quenching or polymer quenching to cool the steel castings rapidly, and the cooling speed of the steel castings reaches 30°C/min-120°C/min; c. The cooled cast The steel piece is heated and tempered to 580°C-650°C, and kept warm; the chemical composition of the steel casting and the mass percentage of each component element are as follows: C%=0.12~0.35, Si%=0.20~1.0, Mn%= 0.5~1.8, P%≤0.035, S%≤0.035, Cr%≤2.20, Mo%≤1.20, Ni%≤0.50, the rest are Fe and unavoidable impurity elements.

The invention relates to the technical field of heat treatment, and discloses a gear carburization process and application thereof. The gear carburization process comprises the following steps of pre-carburization, re-carburization and cooling and heat prevention. The pre-carburization and the re-carburization comprise carburization in different carbon potentials from high to low, and the circulation is carried out for more than one time. The carburization process has the advantages that the permeating rate is fast, the standing time of gear materials at high temperature is shortened, and themicrostructure is refined; and the surface carbon concentration is proper, the permeability layer gradient is gentle, penetrating agents are saved, and energy resources are saved. The short time heatprevention of gears in a perlitic transformation area can enable the gears to effectively diffuse and separate out alloy carbides in a hardened layer area, the microstructure coarsening is restrained,and gears with better microstructure performance are obtained; and the subsequent quenching times can be reduced, and the process is simplified. Conditions are created for reducing the manufacturingcost of the type of gears due to the fact that the process improves the heat treatment efficiency of heavy-load gears, and improves the product microstructure performance.

The invention relate to a bogie hearth thermal treatment furnace with an adjustable heating space. The bogie hearth thermal treatment furnace with the adjustable heating space comprises a furnace body (1) and a movable bogie hearth (2); a furnace door (3) is installed on the movable bogie hearth (2); a movable furnace door sealing mechanism is respectively arranged on the furnace body (1) in a position matched with the position where the furnace door (3) is movably installed on the movable bogie hearth (2). A plurality of heating chambers (12) is divided inside the furnace body (1); a fume outlet (16) of each heating chamber (12) is respectively connected with an air preheater (4); and a hot air outlet (41) of each air preheater (4) is respectively connected with an air-fuel proportional valve (17) of a burner (13). By using the bogie hearth thermal treatment furnace with the adjustable heating space, a proper space of the thermal treatment furnace can be heated based on the number of the workpieces requiring thermal treatment, accordingly more fuel can be saved, the heating time can be shortened, the thermal treatment efficiency is higher, without the thermal treatment effect being influenced. With s reasonable structure, the bogie hearth thermal treatment furnace allows the fuel utilization ratio to be higher, thereby saving the energy.

The invention discloses a method and devices of vacuum heat treatment for shear productions. A furnace of heat treatment with three-cell vacuum, a standard closed loop control system and intelligent controlling are adopted to guarantee high craft accuracy. The method can efficiently solve problems of deficient finish and hardness to meet the requirements including sharp cutting edge, non-wearing and non-tipping. Processed by vacuum heat treatment, shears have much strongpoint including non-oxidation, non-decarburizing, good surface craft, minute deforming, excellent integrated mechanical property of heat treatment and long operating life. The method guarantees finish and hardness of shears and meets the requirements of sharp cutting edge, non-wearing and non-tipping. Compared with existing techniques, the method can reduce the power consumption of production, revive partial contradiction of using electricity, reduce cost of productions, advance performance and lifespan of productions, save energy sources and improve efficiency of productions.

The invention discloses a nuclear power station reactor core cooling system safety injection box composite steel plate and a manufacturing method thereof. The steel plate is composed of carbon steel of tempered sorbite organization and 304L austenitic stainless steel. The steel billets are symmetrically compounded, an upper layer and a lower layer are carbon steel, two layers in the middle are stainless steel, and an isolating agent is added between the two layers of the stainless steel. The vacuum degree of a composite billet is 1.0-5.0 x 10<-2>Pa. A heating temperature is 1200-1250 DEG C, heating time is 10-15 hours, a single-pass pressing rate is 5%-15%, and the final rolling temperature is larger than or equal to 1000 DEG C. The quenching temperature is 890-920 DEG C, the heat preservation time is 2-3 min/mm, the temperature rising rate is 1.0-1.5min/mm, and water is cooled to be less than or equal to 100 DEG C after being discharged from a furnace. The tempering temperature is 630-660 DEG C, the heat preservation time is 4-6 min/mm, and the temperature rising rate is 1.5-2.0 min/mm. According to the manufacturing method, the produced steel plate has high normal temperature andhigh temperature performance, good shearing strength and bonding strength, and meets requirements for the steel usage by the nuclear station.

In order to increase the practical value and provide for increased availability of retort furnaces (I.1, II.1, III.1) for the heat treatment of metal workpieces using tubular retorts (I.3, II.3, III.3) surrounded by furnace housings (I.2, II.2, III.2), according to a first variant the weight of the batch is to be decoupled from the retort (I.3), according to a second variant a second circulation device (II.18.2) is to be arranged for heating elements (II.6) of the retort (II.3), and according to a third variant a bottom (III.9) of the retort (III.3) is to be equipped with a second bottom (III.9.1) and/or adjusting flaps (III.20, III.21). Combinations of the three variants create the prerequisites for a variety of designs of retort furnaces (I.1, Il.1, III.1), which increase the efficiency of the heat treatment of metal workpieces.

The invention provides a vacuum multi-purpose furnace, which belongs to the technical field of heat treatment. The vacuum multi-purpose furnace comprises a quenching furnace shell, an inner furnace shell and a carburizing furnace shell, wherein the quenching furnace shell is connected with the carburizing furnace shell by virtue of the inner furnace shell, an outer furnace door is arranged at an opening of the quenching furnace shell, material inlet and outlet tracks are arranged in the quenching furnace shell and the carburizing furnace shell, a push-pull machine and a lifting platform which are used for feeding and discharging materials are arranged in the quenching furnace shell, the push-pull machine and the lifting platform are crossed, a first motor is arranged on the top of the quenching furnace shell, the first motor is connected with a fan, a lifting inner furnace door, a door frame, a compensation track assembly and a pressing assembly are arranged in the inner furnace shell, the door frame can be pressed on the inner furnace shell by the pressing assembly, the inner furnace door can move along the door frame, the compensation track assembly is lifted along with the inner furnace door, a heater is arranged at the bottom of the quenching furnace shell, an internal furnace is arranged in the carburizing furnace shell, a plurality of electric radiation heating pipes are arranged in the carburizing furnace shell, and vacuum nitrogen charging units are respectively connected to the quenching furnace shell and the carburizing furnace shell. The vacuum multi-purpose furnace has the advantage of high degree of automation, and the efficiency of heat treatment is improved.

The invention discloses a rapid induction heating and air cooling heat treatment process for a steel wire. The process comprises the following steps of: rapidly heating a high-carbon steel wire with the diameter of 2 to 4mm to austenitizing temperature in an induction heating mode within three seconds, keeping the temperature for 5 to 20 seconds, and rapidly cooling the heated steel wire to sorbite low temperature in an air cooling mode to obtain a fine sorbite structure, wherein the rapid air cooling rate is 80 to 200 DEG C/second. The process has the advantages that the process is environment-friendly and easy and convenient to operate, expensive heat treatment equipment is not needed, manufacturing cost is low, production efficiency is high, and the like; and by the process, obvious social benefit and economic benefit are achieved.

The invention relates to a continuous heat treatment production line and a heat treatment method thereof. The continuous heat treatment production line comprises a feeding table, a medium temperaturenormalizing furnace, a quick cooling table, a low temperature tempering furnace and a discharging table; a medium temperature feeding furnace door is arranged at the feeding end of the medium temperature normalizing furnace, a medium temperature discharging furnace door is arranged at the discharging end of the medium temperature normalizing furnace, the quick cooling table is arranged on one sideof the discharging end of the medium temperature normalizing furnace in a matched mode, the low temperature tempering furnace is arranged on one side of the discharging end of the quick cooling tablein a matched mode, a low temperature feeding furnace door is arranged at the feeding end of the low temperature tempering furnace, and a low temperature discharging furnace door is arranged at the discharging end of the low temperature tempering furnace; and the discharging table is arranged on one side of the low temperature tempering furnace in a matched mode, and the feeding table, the mediumtemperature normalizing furnace, the quick cooling table, the low temperature tempering furnace and the discharging table are connected to one other through material transfer roller ways to transportworkpieces. Normalizing heating and rapid and uniform cooling of bainite alloy steel point rails are achieved, normalizing residual heat is used for entering the furnace for tempering, the layout of the production line is compact and reasonable, automatic furnace installing and discharging are achieved, and production efficiency and product quality are improved.

The invention discloses a heat treatment production line for bearing parts. The heat treatment production line comprises a quenching line and a tempering line, a feeding transition material table set, a front cleaning device, a quenching heating furnace, a salt bath quenching device and a quenching rear air cooling cleaning system are linearly arranged on the quenching line in sequence from left to right, a cold cleaning device, a draining chamber, a drying chamber, a tempering furnace, a tempering rear air cooling device and a discharging transition material table set are sequentially and linearly arranged on the tempering line from right to left, a first rail set is installed on the ground on the left side of the quenching line and the tempering line, a second rail set is installed on the ground on the right side of the quenching line and the tempering line, and the first rail set and second rail set are each provided with a lifting conveying material table. The heat treatment production line is specially designed and arranged according to a bearing part heat treatment process, is reasonable in layout and small in occupied area, is divided into the quenching line and the tempering line, can complete the whole heat treatment process of the bearing parts through one-time circulation, has the functions of cleaning, drying and the like, and is high in bearing part heat treatment efficiency and stable in heat treatment quality.

The invention discloses a heat treatment device for a rotary support outer ring raceway. The heat treatment device comprises a cooling barrel, the upper end of the cooling barrel is symmetrically provided with two supporting columns, the two supporting columns are provided with a heating unit capable of ascending and descending up and down through a horizontal beam, the cooling barrel is divided into upper and lower two layers, and the upper layer of the cooling barrel contains cooling liquid and is further internally provided with a positioning unit capable of moving up and down and capable of rotating. According to the heat treatment device for the rotary support outer ring raceway, by means of the positioning unit, rotary support outer rings of various sizes can be placed, and heat treatment is performed on these rotary support outer rings at the same time, and the heat treatment efficiency of the rotary support outer ring raceway is greatly improved; and in addition, by means of the heat treatment device for the rotary support outer ring raceway, heating, heat preservation and cooling are concentrated on one device, three heat treatment processes of the heating, the heat preservation and the cooling are made to have good continuity, and the heat treatment effect is guaranteed.

The invention discloses a precise and high-strength sheet metal part. The precise and high-strength sheet metal part comprises a sheet metal part body. The sheet metal part body comprises, by weight,0.03-0.09% of Zr, 1.56-1.98% of Re, 1.32-1.59% of Bi, 0.05-0.16% of C, 3.32-3.56% of Si, 1.26-1.38% of Mn, 0.12-0.15% of Mo, 0.6-0.9% of Ni, 2.23-2.58% of Cu, 1.19-1.25% of Ti, 25-29% of lanthanide-series rare earth, and the balance Fe and trace impurities. The rare earth comprises, by weight, 9.6-9.9% of Ce, 11-15% of La, 9-18% of Y, 11-15% of Sc, 6-9% of Gd, 2-6% of Sm, and the balance Gd.

The invention relates to the technical field of full-hardening cold-rolling working roller heat treatment processing, and discloses a novel full-hardening cold-rolling working roller heat treatment process. Preheating treatment is performed on a workpiece first, then high-temperature quenching and heating are performed at 1080-1180 DEG C, and then the workpiece is hung into a constant-temperaturequenching environment to be subjected to constant-temperature quenching treatment. By means of the novel full-hardening cold-rolling working roller heat treatment process, heating and heat preservingare performed at each stage with the purposes of ensuring that the workpiece moves to a higher-temperature environment and finally reaches a quenching temperature after internal and external metal texture reaches a set temperature, reducing the deformation of the workpiece to a certain extent, shortening the heating time of the workpiece at the quenching temperature, improving the heat treatment efficiency of the workpiece, improving the metallographic phase texture distribution compactness, thermal shock resistance and abrasive resistance of a working roller, ensuring that hanging and air-cooling are performed after the parts, with different sizes, of the cold-rolling working roller reach the same temperature, effectively reducing the deformation of the cold-rolling working roller and preventing the working roller from being bent or broken.

The invention discloses a medium-frequency heat treatment system and heat treatment process for petroleum tool irregular materials. The heat treatment system comprises a medium-frequency heater, a discharge rack, a feed rack, a sprayer and a circulating air cooler, wherein the discharge rack and the feed rack are respectively arranged at the left end and the right end of the medium-frequency heater; the sprayer is arranged above the middle part of the medium-frequency heater; and the circulating air cooler cooperates with the sprayer for use. The heat treatment process comprises the following steps: (1) cleaning the petroleum tool irregular materials; (2) heating the petroleum tool irregular materials, soaking, and water-cooling and air-cooling at the same time; (3) heating the petroleum tool irregular materials, soaking, and air-cooling; and (4) inspecting before warehousing. The invention has the advantages of simple process steps, favorable process parameters, reasonable system structure, high heat treatment efficiency and simple control operation. The invention can effectively avoid the phenomena of cracking and laminating at the end of the petroleum tool irregular material, prevent cooling water from entering the inner bores and ensure that the inside and the outside thereof are uniformly heated. The whole treatment process does not have oxidation or decarbonization, thereby having no pollution.

The invention relates to a meat corpse continuous pyrolysis carbonization device which comprises a preheating room (1), a carbonization room (2), a cooling room (3), a pyrolysis gas recycling unit (4) and a charging basket (5), wherein the preheating room (1), the carbonization room (2) and the cooling room (3) are sequentially connected; furnace doors are arranged for the preheating room (1), the carbonization room (2) and the cooling room (3); an air flue is formed between the outer wall of each furnace pipe and the inner wall of each furnace body; a combustion room (42) is arranged at the side of a second furnace body (20), and an exhaust gas discharge pipe (43) is communicated with a second furnace pipe (21) and the combustion room (42); a high-temperature flue gas importing pipe (44) is used for discharging gas in a second air flue (27); a first material pusher (16) feeds the charging basket (5) from a first feeding end (13) and pushes the charging basket (5) from a third discharging end (33); the charging basket (5) is used for placing meat corpses. The device provided by the invention solves the problem that the equipment quantity is great and the whole structure is complex and has the advantages of being high in automatic degree, simple in process, simple in equipment structure and the like.

The invention relates to a stacked steel plate conveying system which comprises a transverse moving rail and a steel plate conveying vehicle running on the transverse moving rail. The guide stroke of the transverse moving rail covers each matched heat treatment station; the steel plate conveying vehicle is provided with a side-moving lower vehicle roller way suitable for bearing steel plate stacks, and the conveying direction of the side-moving lower vehicle roller way is perpendicular to the guiding direction of the transverse moving rail. In addition, the invention further provides a hot rolled plate continuous heat treatment method. The method comprises the following steps: after continuously quenching a steel plate, performing fixed-length cutting and stacking; using the stacked steel plate conveying system for conveying the steel plate stacks formed by stacking a plurality of steel plates to a downstream heat treatment station. The steel plate conveying vehicle is adopted as steel plate conveying equipment, whole-pile transportation of steel plate stacks can be achieved, namely batch steel plate heat treatment is achieved, the steel plate conveying efficiency and the steel plate heat treatment efficiency can be remarkably improved, particularly in long-distance transportation, the steel plate transportation stability can be improved, and the equipment investment cost is obviously reduced.

The invention belongs to the field of waste disposal, and particularly discloses a plasma-based ship organic waste gasification incineration treatment system. The plasma-based ship organic waste gasification incineration treatment system comprises a pretreatment subsystem, a heat treatment subsystem and an auxiliary subsystem, wherein the pretreatment subsystem is used for pretreating organic waste; the heat treatment subsystem comprises a plasma torch, a gasification chamber, a combustion chamber and an ash deposition chamber which are sequentially connected, the plasma torch is used for providing a heat source for the gasification chamber, the gasification chamber is used for carrying out thermal decomposition on the pretreated organic waste to form organic fragments, the combustion chamber is used for incinerating the organic fragments, and the ash deposition chamber is used for cooling and dredging smoke and ash after the organic fragments are incinerated; and the auxiliary subsystem comprises a power supply electric control device and a gas supply device and is used for providing electric power and gas supply for the whole system. According to the plasma-based ship organic waste gasification incineration treatment system, the advantages of the plasma treatment of the organic waste are fully utilized, the pretreatment device and the gasification chamber are combined to be optimized, so that the adaptability to the types of the organic waste is wider, and the heat treatment efficiency is higher.

The invention discloses a high-strength and high-plasticity heat-resistant and fire-resistant magnesium alloy. The alloy comprises the following chemical elements of, in percentage by mass, 1.0%-3.0%of Sn, 0.5%-2.5% of Al, 0.5%-2.0% of Ca, 0.1%-0.5% of Mn, 0.5%-2.5% of Zn, 0.1%-0.5% of Si, 0.1%-0.5% of Sr, and the balance Mg and other inevitable impurities. The invention further discloses a manufacturing method of magnesium alloy extruded material prepared from the high-strength and high-plasticity heat-resistant and fire-resistant magnesium alloy. The method comprises the following steps of(1) smelting and casting raw materials to obtain a magnesium alloy blank ingot; (2) heating the magnesium alloy blank ingot to heat treatment temperature preservation temperature in a heating rate of2 DEG C/s-100 DEG C/s, wherein the temperature range is 200 DEG C-450 DEG C, and the heat preservation time is 5 min-1000 min; (3) reheating the magnesium alloy blank ingot to extrusion preheating setting temperature in the heating rate of 2 DEG C/s-100 DEG C/s, preheating the magnesium alloy blank ingot for a period of time, wherein the extrusion preheating setting temperature is 50 DEG C-300 DEGC; (4) extruding the magnesium alloy blank ingot into the magnesium alloy extruded material by adopting an extruding machine; and (5) carrying out aging treatment after extruding.