173 results about "Hot work" patented technology

The invention relates to the technical field of process optimization, and discloses a hot work die steel heat treatment process optimization method and system.The method comprises the steps that hot work die steel samples are collected under multiple sets of different process conditions, and a performance basic data set is obtained; constructing a multi-target coordination optimization model based on the performance basic data set; performing phase change detection on the hot work die steel sample to obtain phase change monitoring data; performing prediction in combination with the phase change monitoring data to obtain a performance prediction result; and solving an optimal process parameter combination based on the performance prediction result and the multi-target coordinated optimization model, and realizing simultaneous optimization and coordinated balance of a plurality of performance indexes in the heat treatment process of the hot work die steel by making full use of associated information among different performance indexes.

The invention relates to the technical field of powder metallurgy materials, and discloses rare earth microalloyed ultrahigh-strength high-toughness hot work die steel and a preparation method thereof.The die steel is prepared from 4Cr5MoSiV1 pre-alloyed powder, rare earth hydride, boron carbide and porous amorphous carbon powder loaded with a nickel catalyst. The preparation method comprises the steps of material mixing, sheath packaging, graded dynamic reaction thermal devolatilization, hot isostatic pressing densification and heat treatment, in the graded dynamic reaction thermal devolatilization, active hydrogen generated by decomposition of rare earth hydride is used for reducing oxide on the surface of powder, and nickel catalyzed carbon powder is used for capturing water vapor at low temperature to generate CO to be discharged. An oxide film on the surface of the powder is thoroughly removed through in-situ chemical reaction, original particle boundaries are eliminated, meanwhile, a nano strengthening phase with high thermal stability is generated in situ, and the high-temperature strength, impact toughness and tissue compactness of the die steel are remarkably improved.

The utility model relates to the technical field of early warning devices, and discloses a fire operation leaving early warning device which comprises a base, a supporting frame is vertically and fixedly connected to the top of the base, a lifting plate is vertically and slidably connected to the surface of the supporting frame, a connecting box and a control box are fixedly connected to the surface of the lifting plate, and the control box is arranged at the top of the connecting box. A sliding mechanism for sliding the lifting plate is arranged on the surface of the base, a mounting plate is horizontally and fixedly connected into the supporting frame and arranged at the top of the supporting frame, a human body induction module is mounted on the surface of the mounting plate, and universal wheels are mounted at the four corners of the bottom of the base. According to the device, the lifting plate is arranged in an up-down sliding manner, so that the device can be conveniently used for people with different heights and different use scenes during use, the use effect of the device is improved, meanwhile, the device is matched with real-time monitoring of the human body sensing module, prompting is conveniently carried out when the device leaves people, and the safety of the device is improved.

The utility model relates to vertical annealing equipment for a metal ultra-thin strip and an operation method, and belongs to the related technical field of metal ultra-thin strip hot working, the vertical annealing equipment comprises a furnace body device, a tension measuring device, a direction roller, an unwinding device, a winding device, a straightening device and a deviation rectifying device, the furnace body device comprises a muffle tank and a furnace body shell, a plurality of groups of elastic brackets fixedly connected with the furnace body shell are arranged on the outer side of the muffle tank in the length direction of the muffle tank, and the top of the muffle tank is fixedly connected with the top of the inner side of the furnace body shell through the top elastic bracket, so that the service life of the muffle furnace is prolonged; one side of the furnace body shell is respectively connected with a molecular pump and a gas inlet through steel pipes, the other side of the furnace body shell is provided with a gas outlet, and pipelines for connecting the molecular pump, the gas inlet and the gas outlet are respectively provided with a gas valve, so that the conversion between vacuum annealing and atmosphere annealing in the muffle furnace is realized; and the straightening device comprises a plurality of straightening rollers, so that high-precision straightening can be carried out on the annealed metal ultra-thin strip, and the strip shape quality of the strip is effectively improved.

The invention discloses a post-forging heat treatment method for improving the structure uniformity of hot-work die steel, which comprises the following steps: (1) returning the forged hot-work die steel to a furnace, supplementing the temperature to 980-1020 DEG C, preserving the heat for 4-6 hours, discharging the hot-work die steel, alternately cooling the hot-work die steel to 150-300 DEG C by water and air, and loading the hot-work die steel into a heating furnace; (2) the temperature is increased to 650-750 DEG C along with the furnace, heat preservation is conducted for 2-4 h, and the mixture is discharged out of the furnace, air-cooled to 150-300 DEG C and loaded into a (3) the temperature is increased to 800-850 DEG C along with the furnace for preheating and heat preservation, and the heat preservation time is 2-4 Raising the temperature to 1020-1050 DEG C, and keeping the temperature for 4-6 hours; and discharging from the furnace, alternately cooling to 150-300 DEG C by water and air, loading into a heating furnace, and carrying out isothermal spheroidizing annealing. According to the method, the forging structure can be refined, the forging coarse grain and mixed crystal defects are eliminated, chain carbide precipitation of the annealing structure is inhibited, and the uniformity of the annealing structure and the transverse core impact toughness of the material can be remarkably improved.

The invention discloses a manufacturing method of high-quality electric furnace hot work die steel. The manufacturing method comprises the following steps: primarily smelting a die steel raw material by adopting an EAF furnace; the metal raw materials obtained through primary smelting are refined through an LF furnace; entering a VD furnace for vacuum degassing, and improving carbides by adopting a magnesium core-spun yarn; casting a 13t or 20t steel ingot by using the obtained molten steel, using casting powder and hanging, using a heat generating agent after casting, demolding after mold cooling, and thermally sending the demolded steel ingot to a forging area for heating or thermally charging and annealing; and forging by adopting a temperature programming mode, and finally carrying out heat treatment. The forging rod has the advantages that a die manufactured after the forging rod is processed and subjected to heat treatment is used for producing 6 series of aluminum alloy sections and the like by an extruder of 5000 tons or above, die cracking and early failure are avoided, the service life of the die is equivalent to that of electroslag 4Cr5MoSiV1 (H13), the manufacturing cost is greatly reduced, and the effect is good.

The invention belongs to the technical field of stainless steel hot working, and discloses a martensitic stainless steel hot rolled steel coil manufacturing method capable of solving the edge crack problem in the wide rolling process so as to improve the yield. Comprising the steps that firstly, a continuous casting slab is heated for the first time in a heating furnace, the temperature of a heating section is 1100-1150 DEG C, the temperature of a soaking section is 1150-1200 DEG C, the heat preservation time of the soaking section is (1.00-1.25) t min, and t is the actually measured thickness mm of the slab before the slab enters the furnace; secondly, the heated continuous casting sheet billet is rolled into an intermediate billet through a roughing rolling unit, and the outlet temperature of the roughing rolling unit is 1000-1010 DEG C; 3, returning the intermediate billet to the heating furnace for secondary heating, wherein the heat preservation time of a soaking section of the secondary heating is shorter than that of the primary heating; fourthly, the intermediate billet heated for the second time is fed into a roughing rolling unit to be rolled, and the outlet temperature of the roughing rolling unit is 1000-1010 DEG C; 5, putting into a hot coil box after rolling; sixthly, the steel plate is fed into a finishing mill group to be rolled to the target thickness, and the finish rolling temperature is 1000-1050 DEG C; and 7, after finish rolling, laminar cooling is conducted to 300-400 DEG C, and then coiling is conducted.

The invention discloses a fire operation management system based on artificial intelligence and a use method thereof, and relates to the field of safety management of building engineering construction. The front end of the system is composed of an AI fire monitoring robot and a WeChat management applet, and the rear end of the system comprises an enterprise end management large screen and a project management platform. After information is input by creating a database, an operator initiates a fire application through an applet, and a license and a disclosure book are generated according to process approval. The AI fire monitoring robot carries out human face recognition before operation, carries out real-time monitoring and early warning by using technologies such as images, organisms and sensors in the process, and carries out continuous monitoring after operation until hidden dangers are eliminated and generates a report. The system effectively solves the problems of tedious flow, difficulty in tracing, lacking in supervision and the like in the traditional fire operation management, achieves the precise management and control of the whole process of the fire operation, remarkably improves the operation safety and management efficiency, and provides an intelligent and efficient safety management guarantee for the fire operation in the fields of building construction and the like.

The invention provides a fire operation safety management system, which belongs to the technical field of operation safety supervision and comprises an operation application unit, a measure confirmation unit, an operation examination and approval unit, a start confirmation unit, an operation implementation unit and an operation completion unit. The measure confirmation unit matches and confirms operation safety measures; the job approval unit matches an approval process including multi-stage approval and face recognition verification; the work starting confirmation unit verifies the tools, senses the environment and secondarily confirms gas monitoring; the operation implementation unit is linked with data to supervise the operation state; and the work completion unit guides acceptance, returns tools and the like and archives work tickets. The system has the beneficial effects that operation approval management is strengthened, an intelligent safety protection system of'full-chain control, whole-process trace reserving and full-risk pre-judgment 'is constructed by means of hardware auxiliary means such as field monitoring and personnel positioning, closed-loop management of an operation process is realized, and intrinsic safety transformation from an enterprise to active prevention is promoted.

The application relates to the technical field of die steel, and particularly discloses a high-performance strong and tough hot work die steel and a preparation method thereof. The high-performance strong and tough hot work die steel comprises the following raw materials: C 0.3-0.5%, Si 0.3-0.8%, Co 0.2-0.3%, Mg 0.1-0.14%, Ti 0.23-0.35%, V 0.38-0.56%, Al 0.08-0.14%, Mn 0.1-0.18%, NiCrMo alloy powder 7-10%, P<=0.05%, S<=0.02%, and the balance of Fe and inevitable impurities. The raw materials are sequentially put into a vacuum induction furnace for smelting and poured into a steel ingot; the steel ingot is annealed and hot-rolled and then air-cooled to room temperature, and then heat treatment is carried out; the preparation method is simple and the preparation conditions are mild; the obtained hot work die steel is excellent in hot strength, toughness and wear resistance, and can meet the market application requirements.

The utility model discloses an aluminum bus welding rapid preheating device which comprises a baking gun gas conveying pipe, the tail end of the baking gun gas conveying pipe is connected with a gas inlet pipe joint, the gas inlet pipe joint comprises a combustible gas pipe joint and a combustion-supporting gas pipe joint, and the combustible gas pipe joint and the combustion-supporting gas pipe joint are connected to form a Y-shaped gas inlet pipe joint. A holding soft sleeve is connected to the outer surface of the baking gun gas conveying pipe in a sleeving mode, an L-shaped pipe connector is connected to the front end of the baking gun gas conveying pipe, a semi-annular bent pipe frame is installed at the top end of the L-shaped pipe connector, and a plurality of welding gun nozzles are installed on the inner side of the semi-annular bent pipe frame. According to the scheme, the front end opening of the gas conveying pipe of the baking gun is connected with the semi-annular bent pipe frame through the L-shaped pipe connector, and the welding gun nozzles which are symmetrically distributed are arranged on the inner side of the semi-annular bent pipe frame. The aluminum bus located at the circle center of the semi-annular bent pipe frame can be welded and preheated at the same time from multiple angles, the welding preheating efficiency is higher, and operation is easy.

The application discloses a manufacturing method of a welded multilayer gas distribution plate of a CVD (Chemical Vapor Deposition) device, and the method comprises the following steps: single-piece machining; single-piece inspection; ultrasonic cleaning; vacuum drying; welding I; post-welding machining; welding II; heat treatment; shielding; grinding; unshielding; shape correction; turning; surface polishing; ultrasonic degreasing cleaning; surface blow-drying; and vacuum drying. The method can satisfy the requirements that the flatness of the welded multilayer gas distribution plate is less than or equal to 0.02 mm, the parallelism is less than or equal to 0.02 mm, and the position degree is less than or equal to 0.1 mm. The welding and the heat treatment belong to hot processing, the parts will be deformed, the deformation amount is large, the requirements that the flatness is less than or equal to 0.02 mm, the parallelism is less than or equal to 0.02 mm, and the position degree is less than or equal to 0.1 mm cannot be satisfied, and the material is soft after the heat treatment, the aluminum chips generated by the turning and milling processing will block the holes of the gas distribution plate, so that the gas distribution plate loses the function. The process is suitable for the welding type double-layer, multilayer, first-order hole, second-order hole, third-order hole and multi-order hole gas distribution plate.

The invention relates to the technical field of hot working equipment, and provides a local temperature-controllable brazing furnace system and a method for welding a water cooling plate and a side cooling plate thereof.A furnace body with the front portion, the rear portion and the top portion capable of being opened and closed is arranged for welding, in this way, closed welding is conducted, the external environment is blocked, and the furnace body is heated through twelve linear silicon carbide rods; nitrogen is introduced outside the furnace body by arranging a copper pipe, the nitrogen is preheated by the copper pipe and enters the furnace, the temperature is uniform, and it is guaranteed that the oxygen content of the furnace body is smaller than or equal to 18 ppm; when the brazing furnace is used for welding a water cooling plate and a cold measuring plate, a welding tool is installed on the support in the furnace body, then a welding piece is installed on the tool, then the furnace body is closed, gradient heating is conducted, nitrogen is introduced for welding, and air cooling is conducted after welding is completed. Aiming at industrial pain points such as non-uniform high-frequency welding temperature and performance degradation of a non-welding area caused by integral heating of a tunnel furnace, a physical isolation and dynamic temperature control fusion technology is developed, and accurate temperature control of the welding area is realized.

The embodiment of the invention provides a thermotechnical automatic production feeding device. The thermotechnical automatic production feeding device comprises an elevator and a feeding hopper fixedly connected to the surface of a conveying belt of the elevator. The covering part comprises a plurality of covering plates which are connected to the two sides of the elevator in a sliding mode and can synchronously move along with the feeding hopper, and the covering plates are used for covering the top of the feeding hopper in the lifting process of the feeding hopper. According to the feeding hopper, the covering component is arranged, and the covering plate of the covering component is located on the upper side of the feeding hopper in the lifting process of the feeding hopper and synchronously moves along with the feeding hopper, so that the effect of covering a coal mine in the feeding hopper is achieved, meanwhile, falling of coal briquettes and outward scattering of coal ash are prevented, and the working environment is optimized.

This invention relates to the field of hook tail frame processing technology, and discloses a hot-working fixture for hook tail frames, including a fixed arm, a fixed rod, and a support rod. The top end of the fixed rod is connected to the fixed arm. The fixed rod includes a left fixed rod and a right fixed rod vertically arranged on the left and right sides of the fixed arm. The interval between the left and right fixed rods is less than the inner length of the hook tail frame to be lifted. The left and right fixed rods can simultaneously pass through the inner cavity of one hook tail frame to be lifted, and the bottom of both the left and right fixed rods is provided with a protrusion to prevent the support rod from falling. The support rod is detachably mounted on the protrusion and can contact the bottom surface of the hook tail frame to be lifted to bear weight and support the hook tail frame. This invention has a simple overall structure, is easy to use, and can stably lift a large batch of hook tail frames at a time, which helps to improve the efficiency of hot working.

This invention belongs to the field of hot processing technology of rare earth iron-chromium-aluminum steel coils, specifically relating to a production method for preventing edge cracking of hot-rolled steel coils containing rare earth iron-chromium-aluminum, including: (1) transferring the rare earth iron-chromium-aluminum slab to a heating furnace for heating by using a hot-loading method; (2) rough rolling the rare earth iron-chromium-aluminum slab, with 7 passes and a deformation rate of 12%-16%, 18%-22%, 18%-22%, 24%-28%, 26%-30%, 28%-32%, and 30%-34% for each pass; (3) after rough rolling, heating compensation is applied to the edge of the intermediate slab; (4) after finishing rolling and coiling, a hot-rolled steel coil containing rare earth iron-chromium-aluminum is obtained. The production method of the present invention for preventing edge cracking of hot-rolled steel coils containing rare earth elements (iron, chromium, and aluminum) significantly reduces the problem of edge cracking in hot-rolled steel coils containing rare earth elements (iron, chromium, and aluminum). It can produce hot-rolled steel coils with a rare earth content of 0.02%-0.12%, a thickness of 3.0-3.5 mm, and a width of 1000-1300 mm, preventing edge cracking of hot-rolled steel coils, reducing the risk of breakage after uncoiling, and ensuring the smooth progress of subsequent production.

The invention relates to the field of steel processing, and discloses a method for reducing transverse and longitudinal performance difference of an ultrahigh-strength steel material. The method comprises the steps that a cast ingot with set components is smelted through vacuum induction, and then a vacuum consumable ingot is manufactured; the steel ingot is heated and subjected to heat preservation till primary carbide is fully redissolved; extruding the steel ingot until the ratio of the perimeter to the height of the cross section of the steel billet reaches a preset ratio, and reshaping; the blank is subjected to primary hot rolling alternately with the length direction and the width direction as the rolling direction; and the blank is subjected to secondary hot rolling alternately with the length direction and the width direction as the rolling direction till the thickness of the blank meets the requirement. According to the method, the alloy components and the hot working technology of the ultrahigh-strength steel are comprehensively regulated and controlled, the transverse and longitudinal performance difference of the ultrahigh-strength steel is effectively reduced, the average value ratio of the transverse and longitudinal tensile strength of the ultrahigh-strength steel is 99% or above, the average value ratio of the transverse and longitudinal yield strength of the ultrahigh-strength steel is 98% or above, and the average value ratio of the transverse and longitudinal U-opening impact toughness of the ultrahigh-strength steel is 100% or above.

The utility model discloses an anti-corrosion steel machining production line which comprises a discharging mechanism, a material distributing mechanism is arranged on one side of the discharging mechanism, a hot machining mechanism is arranged at the outer end of the material distributing mechanism, the discharging mechanism comprises a fixing frame, a sliding rod is obliquely arranged on the fixing frame, and a limiting rod is arranged above the sliding rod in parallel. The material distributing mechanism comprises a first material distributing assembly and a second material distributing assembly which are obliquely and adjacently arranged, a hinge is connected between the first material distributing assembly and the second material distributing assembly, bearing chains are symmetrically arranged on the outer sides of the first material distributing assembly and the second material distributing assembly, baffles are vertically arranged on the outer sides of the bearing chains, and limiting wheels are arranged on the upper portions of the ends of the bearing chains. The hot machining mechanism comprises a guide wheel assembly arranged at the outer end of a bearing chain, the steel bars are borne and discharged through the discharging mechanism, the steel bars are separately distributed to the bearing chain through the distributing mechanism to be conveyed, the steel bars are conveyed to the position of the hot machining mechanism through the bearing chain to be heated, and follow-up forming is facilitated.

The present invention relates to a hot working tool steel, a heat treatment method thereof, and a hot working tool. The hot working tool steel has a chemical composition, in weight percent, of: Ni: 4.5-12%, Al: 0.8-2.1% and Al:Ni=0.075-0.234, Cu: 0.4-1.99%, Mn: 0.001-1%, C: 0.0001-0.1%, with the balance being Fe and unavoidable impurities. The heat treatment method includes a hardening step, wherein: when 0.4% ≤ Cu < 0.8%, the hot working tool steel is heated to a temperature in the range of 560-650°C; when 0.8% ≤ Cu < 1.5%, the hot working tool steel is heated to a temperature in the range of 470-580°C; and when 1.5% ≤ Cu ≤ 1.99%, the hot working tool steel is heated to a temperature in the range of 450-520°C; and held for 1-240 hours, preferably 4-24 hours, and then cooled to room temperature.

The invention discloses a metallurgical-defect-free high-temperature wear-resistant cobalt-based alloy coating and a preparation method and application thereof.The preparation method comprises the following steps that (1) Fe powder, Co powder, Cr powder, Ti powder, Mo powder and Ni powder are accurately weighed according to the stoichiometric equation Co57Fe5Ni5Cr25Ti5Mo3, and (2) the weighed powder is put into a ball milling tank to be subjected to ball milling, so that the powder is evenly mixed, and then drying, sieving and drying storage are conducted; (3) 5NiCrMo hot work die steel is selected as a base material, a sand mill is used for polishing the surface of the base material so as to remove surface oxide skin until a bright surface is exposed, and oil stains on the surface are removed; and (4) a laser directional energy deposition method in laser additive manufacturing is used for continuously depositing the crack-free cobalt-based alloy coating with high temperature resistance, wear resistance and no cracks one by one. The high-temperature wear-resistant alloy shows excellent wear resistance at a high temperature, the alloy has a shallower wear depth and a narrower grinding crack width at the high temperature, and the wear rate at the high temperature of 800 DEG C is reduced from 2.171 * 10 <-4 > mm < 3 > / N.m of a 5CrNiMo base material to 2.45 * 10 < 6 > mm < 3 > / N.m of a coating.

The utility model provides a roll collar hot working rotary supporting device, which relates to the technical field of roll collar processing, and comprises a workbench, a plurality of insertion holes are arranged at the top of the workbench, a servo motor I is fixedly connected to the bottom of the workbench, a rotating shaft is fixedly connected to the output end of the servo motor I, and a sealing washer is fixedly connected to the inner side of the workbench. The outer side of the rotating shaft penetrates through the sealing gasket and the inner side of the workbench and extends to the outer side of the workbench. Through the design of the two arc-shaped sliding rails, the rotating rod and the sleeve, roll collars with different diameters can be effectively supported and rotated, it is ensured that the roll collars are kept stable in the hot working process, part of water can be reserved through the design of the multiple grooves in the sleeve, the heat resistance of the device is improved, the water obtained after hot working is filtered through the filter screen, and the water quality is improved. Cooling water can be repeatedly utilized, water resource consumption is reduced, the cost of roll collar heat treatment is reduced, the service life of the device is prolonged, and the use stability of the device is improved.

This invention discloses a machine vision-based method for identifying and judging violations during hot work operations, belonging to the field of hot work operation recognition technology. Specifically, it includes: acquiring infrared thermal imaging data and optical image data of the hot work area to obtain the surface temperature distribution and outline of the hot work tool; for the infrared thermal imaging data, extracting the temperature gradient change characteristics of the heated area of ​​the hot work tool, and generating a dynamic deformation trajectory model based on the temperature gradient change characteristics; for the optical image data, extracting the outline offset of the hot work tool after thermal deformation through outline difference analysis between consecutive frames, and establishing a time-series correspondence with the dynamic deformation trajectory model; when the correspondence between the outline offset of the hot work tool and its temperature gradient change characteristics deviates from a preset correlation threshold range, it is judged as a violation operation; this invention enhances the ability to judge complex violations.

The invention relates to a preparation method of high-purity and high-toughness hot work die steel, which comprises the following steps: S1, electric furnace smelting; s2, refining in a ladle refining furnace; s3, refining in a vacuum refining furnace; s4, performing die casting on an electrode blank; s5, annealing the electrode blank; 6, electroslag remelting is conducted, specifically, an electrode blank is adopted, surface polishing is conducted, a calcium fluoride, aluminum oxide, magnesium oxide and silicon dioxide quaternary slag system is adopted for smelting, the starting point melting speed value of the electroslag smelting steady-state stage is 7-10 kg / min, the end point melting speed value of the electroslag smelting steady-state stage is 5.0-8.0 kg / min, an electroslag ingot is obtained, and then power-off furnace cooling is conducted for 80-100 min; s7, forging is conducted; s8, pretreatment after forging; and S9, solid solution and spheroidizing final treatment. According to the invention, on the basis of common hot work die steel H13, the prepared product has excellent high hardness, high purity and high toughness through fine adjustment of chemical components and special smelting, forging and heat treatment processes. The anti-cracking performance of a mold made of the material is greatly improved, the service life of the mold is prolonged, and meanwhile the use cost of the mold is greatly reduced.

The invention discloses a preparation method of a stainless steel special-shaped wire for an automobile windscreen wiper, and relates to the technical field of stainless steel, and the preparation method specifically comprises the following steps: sequentially carrying out rough drawing treatment and primary online bright annealing treatment on a hot-rolled wire rod to obtain the stainless steel special-shaped wire; and the stainless steel special-shaped wire is subjected to fine drawing treatment and secondary online bright annealing treatment in sequence, and the stainless steel special-shaped wire for the automobile windscreen wiper is obtained. Compared with the prior art, the method has the advantages that by optimizing the hot working and surface treatment processes in stages, the problems of non-uniform internal structure and surface defects of the material caused by unstable heat treatment and concentrated drawing stress in the traditional preparation process are effectively solved.

The invention provides an electric welding / cutting equipment safety fire monitoring device, which is arranged between the electric power input end of electric welding / cutting equipment and commercial power, and comprises a protective shell, an information acquisition unit, a local memory, a start-stop control unit, an MCU and a power supply module, the information acquisition unit is used for acquiring electric welding / cutting equipment information and operator information; the start-stop control unit is used for connecting or disconnecting power input of the electric welding / cutting equipment according to an instruction of the MCU; the MCU interacts with the information acquisition unit, the local memory and the supervision and management platform to generate a control instruction to the start-stop control unit and a work log of the fire operation before and after the fire operation; and the MCU and the supervision and management platform synchronously update the interacted record identification information of the operating personnel. The device is easy and convenient to install, the safety supervision efficiency of electric welding / cutting equipment fire operation can be improved, and the supervision load of a supervision management platform is reduced.

A hot work tool steel for high pressure die casting includes the following main components (in wt. %): C 0.28-0.39, Si 0.05-0.35, Mn 0.1-0.8, Cr 5.4-6.0, Ni≤0.3, Mo 1.8-2.5, V 0.6-1.1, balance optional elements, iron and impurities.

The utility model discloses a feeding mechanism for hot working of chain pieces, which comprises a mounting frame, a feeding belt and a driving motor, the chain pieces are fed through the feeding belt, the feeding belt is arranged on the mounting frame, the driving motor provides kinetic energy for the operation of the feeding belt, a heat preservation cover and a feeding bin are arranged on the mounting frame, the feeding bin is fixedly arranged on the heat preservation cover, and the feeding bin is arranged on the mounting frame. The feeding mechanism comprises a feeding bin and a heat preservation cover, a feeding port for conveying chain pieces is formed in the feeding bin, a heating mechanism is fixedly arranged in the heat preservation cover, and when the chain pieces pass through the feeding port and are fed through the feeding belt, the heating mechanism preheats the chain pieces. The heat preservation cover is arranged on the installation frame, the heating mechanism is arranged in the heat preservation cover, in the process that the chain pieces are fed along the installation frame, the heating mechanism preheats the chain pieces, and the risk that the chain pieces deform or crack due to uneven heating is reduced.

This invention relates to the field of remote monitoring and discloses a hot work safety management system and method based on remote monitoring. One method includes: constructing a preliminary scenario for the work location, fire source intervention method, and isolation measures; implementing a progressive tracking mechanism for the triggered state of the work access framework to reconstruct the changes in the hot work process; comprehensively analyzing images, sounds, warning zone markings, and personnel disturbances transmitted from the site using a work deviation recognition model; digitally labeling the work units and impact ranges corresponding to protection failure scenarios in the background monitoring interface to form a hot work traceability ledger for file location and reverse tracing of responsibility links; and dynamically adjusting the marking colors, prompts, and inspection priorities in real time based on the dynamic updates of the hot work traceability ledger to generate management instructions for the construction site. This invention has the advantage of improving regulatory transparency.

To provide electric power source equipment for thermal processing, which is improved in operability for a worker not skilled in work, and is not suppressed in operability for a skilled worker.SOLUTION: There is provided welding electric power source equipment A1 comprising: a power conversion part 1; a control part 2 controlling the power conversion part 1; and a display part 4 displaying information in a screen of a display device. The control part 2 comprises a display control part 24 which causes the display part 4 to display a parameter display picture on which a plurality of parameters concerning welding are arranged, and a mode switching part 23 which switches between a simple mode and a mode for a skilled worker. The plurality of parameters include a plurality of essential parameters and a plurality of additional parameters. In the simple mode, the display control part 24 causes the display part to display a first picture 9b in which only the plurality of essential parameters are arranged, as the parameter display picture. In the mode for a skilled worker, the display control part causes the display part to display a second picture 9a in which the plurality of essential parameters and the plurality of additional parameters are arranged, as the parameter display picture.SELECTED DRAWING: Figure 2

This invention relates to a method for preparing a high-toughness hot work die steel for hot forging dies, comprising the following steps: S1, electric furnace smelting; S2, ladle refining; S3, vacuum refining; S4, die casting electrode billet; S5, electrode billet annealing; S6, electroslag remelting; S7, forging; S8, post-forging pretreatment; S9, solution treatment + spheroidizing final treatment. Based on the H13 composition, this invention, through adjustment of chemical composition and the use of special smelting, forging, and heat treatment processes, results in a product with excellent high purity, high hardness, and high toughness. Dies made from this material exhibit significantly improved resistance to cracking and corner collapse, extending die life while substantially reducing unit operating costs. This invention also relates to a high-toughness hot work die steel for hot forging dies, suitable for manufacturing large, precision, complex, and long-life critical industrial dies, capable of meeting the stringent performance requirements of die materials in the high-end equipment manufacturing field.