157 results about "Salt bath" patented technology

The invention discloses a high-strength wear-resistant self-lubricating drill bit for a coal mine and a preparation method of the high-strength wear-resistant self-lubricating drill bit. The preparation process comprises the steps that a drill bit blank is prepared from low-alloy carbon structural steel, a high-strength and high-toughness matrix is obtained through thermal refining, and then sand blasting activation is conducted to clean and coarsen the surface. After diamond particles are subjected to acid pickling pretreatment, metal modified diamond composite powder is obtained through salt bath metal and reduction prefabrication. The preparation method comprises the following steps: mixing MoS2 with the carbon dioxide, spraying the mixture on the surface of a matrix through high velocity oxy-fuel to form a wear-resistant coating, and then improving the density and interface bonding strength of the coating through high-frequency induction instantaneous remelting, thereby finally obtaining the coal mine drill bit with high hardness, strong bonding force and self-lubricating performance. The metal modified diamond composite coating containing the metal transition layer and the MoS2 lubricating phase is constructed on the steel substrate, and a high-frequency remelting process is combined, so that the wear resistance, the bonding strength and the self-lubricating performance of the drill bit are synergistically improved, and the drill bit has the advantages of high strength and toughness matching and low cost.

The invention discloses a preparation method and application of a wind cap of a circulating fluidized bed gasifier, the wind cap is arranged at the bottom of a gasifier body, the wind cap mainly comprises a wind cap gas inlet, a wind cap gas outlet and a wind cap gas flow channel, and the wind cap gas flow channel is composed of a Tesla valve fluid channel. The air cap is prepared from modified fly ash through a combined method of freezing ball-milling nano modification, 3D printing coupling microwave-assisted sintering and salt bath chromizing strengthening. According to the method, a large amount of solid waste of fly ash can be consumed to realize carbon emission reduction, the efficiency of the circulating fluidized bed can be improved through structural optimization, meanwhile, the preparation cost of the hood can be reduced, and the method has relatively high application and popularization values.

The invention relates to the technical field of metal heat treatment, in particular to a silicon alloy steel bearing ring high-temperature salt bath quenching process for a high-temperature load environment, which comprises the following steps: S1, carrying out surface sand blasting treatment on a silicon alloy steel bearing ring; s2, stepped heating-heat preservation-cooling treatment is carried out, and the uniformly austenitized ferrule is obtained; s3, the uniformly austenitized ferrule is immersed in a composite salt bath; s4, staged cooling treatment of an air cooling stage and an oil cooling stage is conducted in sequence; s5, the martensite matrix ferrule is subjected to subzero treatment and staged heating; and S6, multi-stage tempering treatment with different temperature gradients is conducted, and the final high-temperature bearing ring is obtained. Through the combined process of stepped austenitizing, composite salt bath ultrasonic quenching, graded cooling, deep cooling and multi-stage tempering, homogenization and stabilization of the structure of the bearing ring are achieved, and the dimensional stability and the tempering resistance of the bearing ring in the high-temperature load environment are improved.

The invention discloses a method for preparing bainite steel through multi-element microalloying, and belongs to the technical field of advanced steel and iron materials. The method comprises the following steps that a forged steel ingot is subjected to first austenitizing and cooling treatment, and a martensite matrix is obtained; and then secondary phase precipitation treatment, secondary austenitizing treatment and cooling are sequentially carried out, and the bainite steel is prepared. According to the invention, an innovative heat treatment process path of martensite initial structure-medium-temperature second phase precipitation-short-time austenitizing-salt bath isothermal bainite transformation is constructed, and the synergistic effect of microalloy elements such as V, Nb, Ti and B is combined, so that the heat treatment process has the advantages that the heat treatment efficiency is greatly improved on the premise of not depending on precious alloy elements such as Cr and Ni; and the superfine bainite steel which is uniform in structure and excellent in comprehensive performance is successfully prepared.

The invention relates to a steel wire rod for a non-quenched and tempered fastener, a production method of the steel wire rod and the fastener, and the steel wire rod is characterized in that through component design, an element B is added on the basis of strengthening elements such as carbon, silicon and manganese, so that excellent hardenability and plasticity of steel are guaranteed; the tensile strength of the steel wire rod obtained through the production process of converter smelting, LF refining, bloom continuous casting, cogging, steel wire rod rolling and offline salt bath of the steel wire rod is 1050-1250 MPa, and the percentage reduction of area is 65-70%; the steel wire rod is subjected to drawing and cold heading to produce the fastener, thermal refining can be omitted, the technical requirements of the 12.9-grade fastener can be met, and the production cost and the carbon emission are effectively reduced.

The invention relates to a method for preparing a super-thick compact infiltrated layer through interface reactivation type cyclic nitridation, and aims to solve the problems that an infiltrated layer obtained through existing salt bath nitridation treatment is insufficient in thickness and poor in performance. The method for preparing the super-thick compact infiltrated layer comprises the following steps: 1, putting a preheated workpiece in a nitriding furnace into a molten salt bath medium, and carrying out salt bath nitriding treatment at the temperature of 380-650 DEG C; 2, carrying out layer removal treatment through stress-assisted surface subtractive machining to remove a surface compound layer of the workpiece; thirdly, the salt bath nitriding treatment and the layer removing treatment are repeated for multiple times; and 4, carrying out surface ultrasonic rolling post-treatment on the workpiece subjected to circulating salt bath nitriding. According to the method, a compound layer formed in the nitriding process is removed, the nitrogen atom diffusion driving force of subsequent nitriding treatment is enhanced, the nitrided layer subjected to circulating salt bath nitriding treatment has higher nitrogen concentration, the thicker nitrided layer is prepared, the depth and compactness of the nitrided layer of the metal workpiece can be remarkably improved, and the comprehensive performance of the nitrided layer is enhanced.

The invention relates to a non-quenched and tempered 10.9-grade high-strength cold heading steel wire rod with low cost and high structure stability and a preparation method. The wire rod comprises the following chemical components in percentage by weight: 0.03-0.05% of C, less than or equal to 0.10% of Si, 1.2-1.7% of Mn, 0.4-0.6% of Cr, 0-0.04% of Nb, 0.004-0.008% of B, more than or equal to 0.020% of Als, less than or equal to 0.040% of Alt, less than or equal to 0.015% of P, less than or equal to 0.010% of S and the balance of Fe and inevitable impurity elements. The cooling speed of the hot-rolled wire rod on the after-rolling air cooling roller way is precisely controlled, the structure of the hot-rolled wire rod is full-granular bainite, and the wire rod finished product has high strength and high plasticity and also has excellent low-temperature impact toughness; and the production process is simple, the production cost is greatly reduced compared with a high-cost production process adopting salt bath treatment / isothermal treatment, and large-scale and low-cost stable production can be realized.

The application relates to the technical field of bearing steel, in particular to a boronized bearing steel and a preparation method thereof. The boronized bearing steel comprises a base body and a boronized layer; the base body is 20CrNiMo steel and comprises the following components in percentage by weight: C 0.18-0.22wt%, Si 0.25-0.32wt%, Mn 0.75-0.83wt%, Cr 0.48-0.55wt%, Ni 0.50-0.70wt%, Mo 0.40-0.50wt%, V 0.18-0.21wt%, and the balance is Fe and inevitable impurities; the boronized layer is obtained through salt bath boronizing, the boronizing agent for the salt bath boronizing is mainly composed of Na2B4O7, Al and KCl, and the thickness of the boronized layer is 20-80 mu m. The application forms a boronized layer with a certain thickness on the surface of the base body through specific base body components and boronizing agents, and the surface hardness, wear resistance, strength and toughness of the bearing steel are significantly improved.

The invention relates to a method for producing a rolling element bearing component (1), wherein: the rolling element bearing component (1) is formed from a rolling element bearing steel of the type 100CrMnSi6-4 or 100Cr6; the rolling element bearing component (1) is heated to form an austenitic microstructure and subsequently quenched in a hot salt bath to a first temperature of between 170°C and 200°C, such that a pearlitic and / or ferritic microstructure is present at least in a core region (8) of the rolling element bearing component (1); thereafter, the rolling element bearing component (1) is heated to at least a second temperature in the temperature range from 220°C to 280°C and held for at least 7 hours, forming a predominantly bainitic microstructure at a surface (7) of the rolling element bearing component (1). The invention also relates to a rolling bearing component (1) and to a rolling bearing (2).

Embodiments of the present disclosure relate to a salt bath system for strengthening glass articles, the salt bath system including: a salt bath defining a first interior volume bounded by at least one sidewall; a salt bath composition including an alkali metal salt disposed within the first interior volume; a containment device defining a second interior volume bounded by at least one sidewall and including a regeneration medium disposed within the second interior volume; and a circulation device disposed proximate an inlet of the containment device, the circulation device operative to circulate the salt bath composition through the containment device. A method for regenerating molten salt is also disclosed.

The invention relates to the technical field of piston rod treatment, and discloses a QPQ piston rod corrosion-resistant treatment device which comprises a frame body, a nitriding salt bath is fixedly connected to the interior of the left side of the frame body, a top plate is fixedly connected to the top of the frame body, and a direction adjusting mechanism is arranged on the left side wall of the top plate; and the direction adjusting mechanism comprises a protection box, two first motors, two first guide rails and two joint blocks, the right side wall of the protection box is fixedly connected to the left side wall of the top plate, and the bottoms of the two first motors are fixedly connected to the front side and the rear side of the interior of the protection box. By arranging the direction adjusting mechanism, the problems that the piston rod or equipment is damaged and the corrosion resistance is reduced can be solved, the front first sliding block and the rear first sliding block synchronously move under driving of the corresponding belts, and therefore the uniformity and consistency of the surface of the piston rod are effectively improved, manual intervention is reduced, the processing time is shortened, and the processing efficiency is improved. And the risk of misoperation is reduced.

The invention discloses a cooling control system and method for salt bath quenching of bearing parts, and relates to the technical field of bearing heat treatment, and the cooling control system comprises a miniature simulation body which is arranged in a salt bath tank and comprises a sealing sleeve, a thermocouple temperature sensor and an electric heating element, and the thermocouple temperature sensor and the electric heating element are sealed in the sealing sleeve; the electric heating element is configured to be capable of actively heating the micro simulation body to a preset target temperature, immediately stopping heating and naturally cooling; and the thermocouple temperature sensor is configured to acquire temperature data of the miniature simulation body in a natural cooling process in real time. According to the cooling control system and method, the quenching intensity of salt bath quenching can be dynamically monitored in real time, a cooling characteristic curve is automatically generated through collected temperature data, a special control model is constructed by utilizing a self-learning algorithm, finally, the water supplementing amount is automatically and accurately adjusted according to the technological requirements, and the water supplementing efficiency is improved. And the cooling rate of the bearing part is stabilized in an ideal range.

The invention is a color capsule suitable for use in food products, comprising a primary emulsion emulsified in a biopolymer-based and gel-form secondary emulsion, and an anthocyanin extract emulsified in the primary emulsion. The invention also describes a method for the production of the color capsules of the invention, comprising the process steps of obtaining an anthocyanin extract from plant raw materials (a), emulsifying the anthocyanin extract in a primary emulsion (b), emulsifying the primary emulsion in a biopolymer-based secondary emulsion in order to obtain a biphasic emulsion (c), and spraying the biphasic emulsion into a salt bath using the electrospraying technique in order to form biphasic emulsion-based gel-form capsules (d).

The utility model relates to the technical field of cast iron pan production and processing, in particular to a cast iron pan hanging device for salt bath nitriding treatment, which comprises a rotating mechanism and an expanded surface stirring structure, the expanded surface stirring structure comprises a plurality of support rods, and the support rods are equidistantly distributed on the outer side of the rotating mechanism. The two supporting frames are pulled to be close to each other, the two supporting frames penetrate through the two handles of the cast iron pan blank correspondingly, the two supporting frames are driven to be away from each other through retraction of the springs on the two sides, then the two handles of the cast iron pan blank are supported by the two supporting frames, and the two handles of the cast iron pan blank are prevented from falling off through the front ends of the two L-shaped supporting frames; a cast iron pan blank is placed in the radial direction through the two supporting frames, so that the cast iron pan blank plays a role in stirring in the rotating process, the contact between the cast iron pan blank and nitrogen atoms in a salt bath is increased, the salt bath is stirred through stirring blades, the salt bath away from the pan hanging device flows inwards, the uniformity of the nitrogen atoms in the salt bath is improved, and resources are fully utilized.

The utility model belongs to salt bath furnace technical field, and disclose a kind of salt bath furnace smoke filtering protection device, including furnace body and the heating cavity of construction in the lower part of furnace body, the front side of heating cavity is inserted with multiple exhaust pipes side by side, and the front end of multiple exhaust pipes is equipped with the cooling filter box that cooling liquid is deposited, and the bottom of cooling filter box is equipped with heat conduction plate nested installation, the top of heat conduction plate is connected with multiple heat conduction sheet one side by side, and the surface of heat conduction sheet one is evenly equipped with multiple heat conduction holes, the bottom of heat conduction plate is connected with multiple heat conduction sheet two side by side, and the surface of heat conduction sheet two is evenly equipped with multiple heat dissipation holes, and the bottom edge of heat conduction plate is symmetrically connected with two connecting plates;Through the above scheme, the problem that although the existing device can efficiently complete the filtration of smoke, but the filtered smoke still has high temperature, leading to the temperature of the device near too high, affecting the comfort of nearby staff.

The invention relates to the technical field of metal stators, and provides a carbonitriding process of a metal stator for a screw drill, which comprises the following steps: preheating the metal stator, and then carrying out salt bath carbonitriding and salt bath oxidation treatment to obtain the metal stator for the screw drill; during salt bath carbonitriding, a carbonitriding agent comprises the following components in parts by weight: 24 parts of a composite carbon material, 10-15 parts of ammonium chloride, 4-8 parts of urea, 3-6 parts of yttrium oxide, 4-8 parts of potassium ferrocyanide and 10-15 parts of potassium chloride; raw materials of the composite carbon material comprise charcoal, carbon nanotubes and light calcium carbonate. According to the technical scheme, the problem that a metal stator is poor in wear resistance in the prior art is solved.

The invention relates to the technical field of glass strengthening, in particular to a low-temperature ion exchange strengthening process method for high-strength glass. According to the technical scheme provided by the invention, the method comprises the following steps: S1, pretreatment of a glass substrate: carrying out ultrasonic cleaning and surface activation treatment on soda-lime silicate glass; s2, low-temperature ion exchange: immersing the pretreated glass into a salt bath containing composite molten salt at 350-420 DEG C, and meanwhile, applying a gradient electric field to treat for 8-14 hours; s3, cooling: cooling the glass from the exchange temperature to 80 DEG C or below by adopting an aerial fog two-phase gradient cooling mode; s4, washing and drying to obtain tempered glass; through the process method, the process time is greatly shortened, the energy consumption is reduced, the performance is remarkably improved, and the thermal deformation risk of the glass is reduced.

The application relates to the field of glass strengthening technology, in particular to a low-temperature ion exchange strengthening process method for high-strength glass. The process method is as follows: S1, glass substrate pretreatment: ultrasonic cleaning and surface activation treatment are carried out on a sodium-calcium silicate glass; S2, low-temperature ion exchange: the pretreated glass is immersed into a salt bath tank containing 350-420 DEG C composite molten salt, and a gradient electric field is applied to the glass for 8-14 hours; S3, cooling: the glass is cooled from the exchange temperature to below 80 DEG C by adopting an air-mist two-phase gradient cooling mode; and S4, water washing and drying to obtain strengthened glass. By the process method, the process time is greatly shortened, the energy consumption is reduced, the performance is obviously improved, and the risk of glass thermal deformation is reduced.

The invention discloses chemically strengthened glass surface treatment equipment, and relates to the technical field of chemically strengthened glass production.The chemically strengthened glass surface treatment equipment comprises a salt bath tank and a crystal filtering assembly, guide rails are arranged on the two sides of the inner wall of the salt bath tank, and the crystal filtering assembly comprises a floating plate frame slidably connected to the surfaces of the guide rails through guide wheels; limiting frames are arranged at the positions, at the bottoms of the guide rails, of the inner wall of the salt bath tank, lifting supporting plates are fixed to the two sides of the top face of the floating plate frame, and the surfaces of the lifting supporting plates are used for bearing hanging baskets loaded with glass. According to the surface treatment equipment for the chemically strengthened glass, the floating plate frame is pressed under the action of gravity when each batch of glass is subjected to chemical strengthening operation, and the filter screen plate rotates to a horizontal state to seal the hollow part of the floating plate frame, so that a solution is filtered to rise to the upper strengthening cavity, and crystallization slag is pressed and gathered to the lower treatment cavity; the solution purity is guaranteed when each batch of glass is subjected to chemical strengthening operation, and the situation that the chemical strengthening effect of the glass is affected due to excessive crystallization slag content in the solution is avoided.

The invention discloses a method for manufacturing color gradient of mobile phone rear cover glass based on a composite salt bath ion exchange coloring technology. According to the preparation method, by designing a specific composite salt bath formula, an innovative workpiece loading mode and precise process control, an ion concentration gradient is formed on the surface of the glass through ion exchange, so that the gradient color effect which is soft in transition, rich in color and high in binding force is prepared through a one-step method; and the glass naturally forms an ion concentration gradient at the interface of the fused salt and the air, so that the steps of adjusting and converting for multiple times in the traditional process are omitted. The production process is simplified, the processing time of a single product can be shortened, and the overall production efficiency is improved; and meanwhile, the equipment investment and the consumption of consumables are reduced, the manufacturing cost is effectively reduced, and the method is more suitable for large-scale industrial production.

The utility model belongs to the technical field of industrial heat treatment, and particularly discloses a salt-water separator and a salt bath mesh belt furnace. A salt-water mixture enters the shell through the salt-water mixture inlet, the heating unit heats the salt-water mixture and separates water vapor and liquid salt, the liquid salt is discharged through the salt outlet, the water vapor is discharged to the condensation cavity through the water vapor outlet and the vapor output pipe, and cooling liquid is arranged in the liquid cooling cavity. The water vapor in the condensation cavity is liquefied into condensed water in a liquid cooling mode, the cooling structure is simple, and the cooling cost is low; the condensation cavity and the liquid cooling cavity are both of an arc-shaped structure, the inner arc-shaped wall of the liquid cooling cavity is attached to the outer arc-shaped wall of the condensation cavity, the cooling area is increased, the water vapor cooling speed is increased, condensate water converges to the two ends of the condensation cavity through the gravity of the condensate water, and the condensate water is discharged through condensate water discharging openings formed in the two ends of the condensation cavity. Power components such as a water pump for promoting condensate water to be discharged are not needed, so that the equipment cost and the later maintenance cost are reduced.

This invention provides a high-strength steel with a low yield strength ratio of 1100MPa and its production method. The steel plate has the following chemical composition by mass percentage: C 0.15~0.17%, Si 0.58~0.6%, Mn 2.53~2.6%, Cr 0.53~0.8%, Ni 1.44~1.6%, Mo 0.2~0.6%, Nb 0.052~0.08%, V 0.02~0.08%, Ti 0.019~0.03%, Al 0.01~0.05%, Cu 0.83~1.5%, with the balance being Fe and unavoidable impurities. The steel plate has a yield strength ≥1100MPa, a yield strength ratio ≤0.88, an elongation ≥14%, and an impact energy ≥30J at -40℃. The finished steel plate has a thickness of 15mm and a microstructure of tempered lath martensite. The high-strength steel plate of this invention, with a yield strength ≥1100MPa, yield strength ratio ≤0.88, elongation ≥14%, and impact energy ≥30J at -40℃, exhibits a low yield-to-tensile ratio. The advantage of this invention lies in the fact that the salt bath Q&P heat treatment process achieves a good balance between high strength and a low yield-to-tensile ratio.

The utility model discloses a detachable reaction kettle salt bath jacket which comprises a salt bath jacket body arranged outside a reaction kettle, a salt bath heater is arranged outside the salt bath jacket body, a quick-opening flange is arranged at the top of the salt bath jacket body, and the inner edge of the quick-opening flange is limited at a supporting boss on the outer edge of the reaction kettle. The outer edge of the quick-opening flange is provided with a quick-opening flange outer edge inner return hook, the top of the salt bath jacket is provided with a salt bath jacket top outer extending edge extending outwards, and the quick-opening flange outer edge inner return hook extends to the bottom of the salt bath jacket top outer extending edge. According to the utility model, the salt bath jacket is not directly welded and fixed with the kettle body of the reaction kettle, so that unpredictable damage possibly caused by welding operation to the kettle body is avoided, the pressure resistance of the reaction kettle is not influenced, and the reaction kettle can still be safely used under harsh conditions.

The invention relates to the technical field of steel production, and provides high-Si ultra-fine grain 11.9 grade non-quenched and tempered cold forging steel and a production method thereof, the high-Si ultra-fine grain 11.9 grade non-quenched and tempered cold forging steel comprises, by weight, 0.05-0.12% of C, 0.70-1.00% of Si, 1.50-1.80% of Mn, 0.30-0.60% of Cr, less than or equal to 0.010% of P, less than or equal to 0.010% of S, 0.0015-0.0040% of B, 0.02-0.08% of V, 0.07-0.16% of Ti, 0.03-0.07% of Al, less than or equal to 0.0040% of N, and the balance Fe and other inevitable impurities; c / 12 is required to be less than or equal to 0.02 + Ti / 48 + V / 51-S / 32. The low-carbon, high-silicon-manganese and microalloying component design is adopted, the structure of the cold heading steel wire rod subjected to online salt bath and aging treatment is ultra-fine grain ferrite + martensite-retained austenite, and the strength and plasticity are remarkably improved.

The invention provides an accurate grinding roller curved surface contour forming method, and belongs to the technical field of curved surface body machining. Comprising the steps of blanking, rough turning, heat treatment, semi-finish turning of end faces, rough grinding of rolling surfaces, finish turning of two end faces, grinding of the two end faces, finish grinding of the rolling surfaces and ultra-finish of the rolling surfaces. In order to prevent the rolling surface from having tool marks after rough turning, the blanking length is equal to the length of the two blanks; after blanking, rough turning is conducted on the blank, and turning is conducted on the position where the center is connected with the tool mark to form two rollers; after rough turning is finished, heat treatment salt bath quenching treatment is conducted; after heat treatment, turning an end face as a centerless grinding machining end face reference; roughly grinding a rolling surface after semi-finish turning the end surface, and removing heat treatment black skin; roughly grinding the rolling surface and then finely turning two end surfaces; performing semi-fine grinding on rolling surfaces after two end surfaces are subjected to finish turning, and roughly forming a logarithmic curve profile at the moment; two end faces are ground after the rolling face is semi-finely ground, so that the end face benchmark of the finely ground rolling face is guaranteed; after two end surfaces are ground, the rolling surface is finely ground, and a logarithmic curve profile is basically formed and then the rolling surface is superfinely ground.

The invention relates to the technical field of heat treatment isothermal tempering, in particular to a heat treatment salt bath isothermal tempering device and a using method, and the heat treatment salt bath isothermal tempering device comprises a shell, an outer heat preservation layer, a salt bath system, a salt guiding assembly, a salt supplementing pipeline, an air cooling system, a temperature thermocouple, a liquid level control system, a hanging basket and a heating system; the shell is arranged on a horizontal plane, an air inlet pipeline is arranged at the head end of the shell, and an air outlet pipeline is arranged at the tail end; the outer insulating layer is arranged on the outer wall of the shell; the salt bath system is provided with a salt bath tank, the salt bath tank is arranged in the shell, and a stirring assembly is arranged in the salt bath tank. According to the method, unique thermal physical properties of a molten salt medium are utilized, inherent defects of a traditional tempering method are overcome, tempering treatment is carried out at the accurate, uniform and constant temperature, and therefore better, more stable and more reliable metal material performance is obtained.

The invention provides a salt bath furnace heat treatment process data acquisition and dynamic adaptation system, and relates to the field of control systems, and the system comprises a process data acquisition module which acquires key salt bath parameters in a salt bath furnace and key workpiece parameters in the salt bath furnace; the data processing module processes the original data output by the process data acquisition module; the database module stores standard parameters of different types of workpieces; the association module determines an association parameter group and a coupling coefficient corresponding to the association parameter group based on the processed process data and the corresponding standard parameters; the dynamic adaptation decision module automatically generates a target salt bath temperature in combination with the coupling coefficient corresponding to the correlation parameter group obtained by the correlation module; and the control module controls the salt bath temperature regulation and control device to work according to the target salt bath temperature. According to the method, the current actual states and correlation of multiple parameters of the salt bath and the workpiece are fully considered, the temperature of the salt bath can be accurately adjusted, and dynamic temperature regulation and control based on multi-parameter collaboration are achieved.

The invention relates to the field of metal heat treatment processes, in particular to a heat treatment device and method for improving the mechanical property of a nuclear-grade high-temperature alloy forge piece. The method comprises the following steps: designing and manufacturing a mold; raw materials are obtained and subjected to vacuum smelting; carrying out forging deformation on the forge piece on a press; solid solution heat treatment is conducted on the forge piece, and cooling treatment is conducted; after the forge piece is subjected to heat treatment, the forge piece is sampled, and performance detection is conducted; the device comprises a base, a heating furnace, a salt bath furnace and a cooling assembly, in this way, the temperature and the cooling speed are accurately controlled, it can be guaranteed that heat treatment process parameters are always in the optimal range, the mechanical property of the forge piece is improved, and the strict requirement for high-performance forge pieces in the nuclear energy field is met.

The present application relates to gas generating device technical field, particularly to a kind of methanol furnace outer pyrolysis device and method for salt bath quenching furnace.The methanol furnace outer pyrolysis device for salt bath quenching furnace includes reaction cylinder, gas guide pipe, catalytic cylinder and heat exchange cylinder, reaction cylinder is fixedly arranged, reaction cylinder is provided with end cap, upper cavity and lower cavity are sequentially arranged in reaction cylinder along vertical direction, gas guide pipe is arranged in upper cavity, and gas guide pipe can communicate upper cavity and lower cavity, and vaporized methanol enters into upper cavity from lower cavity;Catalytic cylinder is provided with multiple, multiple catalytic cylinders are sequentially sleeved on gas guide pipe from inside to outside, and adjacent two catalytic cylinders are slidingly connected.When methanol in reaction cylinder is cracked for a period of time, the amount of carbon deposition on the surface of catalyst on the filter screen of the catalytic cylinder closest to gas guide pipe is relatively large, at this time, end cap can be opened, the catalytic cylinder is extracted, and new catalytic cylinder is sleeved on the outer periphery of the remaining catalytic cylinder on the outer periphery of gas guide pipe, so that the utilization rate of catalytic cylinder can be improved while being convenient to replace.

The present application relates to the technical field of metal material heat treatment, in particular to a kind of multiphase Dievar hot working die steel and its heat treatment method, the method includes the following steps: S1 to be handled Dievar steel is austenitized;S2 after austenitizing Dievar steel is with first isothermal temperature T1 is salt bath isothermal quenching, and keeps t1 time, T1 lower than the martensite transition start temperature of Dievar steel M s Point;S3 with second heating rate fast heating to second isothermal temperature T2, and keeps t2 time, T2 higher than the M s Point;S4 after processing Dievar steel is cooled to room temperature, and multiphase Dievar hot working die steel is obtained.The present application obtains the multiphase structure of martensite+ bainite+ residual austenite by multiphase heat treatment technology, hardness is kept at higher level while impact toughness is significantly improved.Multiphase structure processing technology expands the application range of Dievar steel, and can be applied to more complex die.