92 results about "Induction hardening" patented technology

The invention relates to the technical field of manufacturing of engineering machinery parts, and discloses an engineering machinery driving wheel made of a medium carbon alloy cast steel material. The invention also discloses a preparation process of the engineering machinery driving wheel material, which comprises the following steps: S1, casting treatment: melting the medium carbon alloy steel material, and casting into a driving wheel blank; s2, normalizing heat treatment: carrying out normalizing heat treatment on the driving wheel blank; s3, rough machining treatment; s4, quenching treatment: carrying out induction quenching treatment; and S5, finish machining treatment. The synergistic effect of alloy elements in a medium carbon alloy cast steel material is combined with an optimized air cooling process, so that the cast steel is normalized to obtain a uniform structure which mainly contains superfine pearlite and contains extremely little ferrite, the matrix hardness is stable, and the requirement of a high-performance driving wheel is completely met; after the process route is improved, tempering and shot blasting and flaw detection procedures after tempering are canceled; the technological process is greatly shortened, material turnover is reduced, and the production efficiency is improved.

The invention relates to the technical field of metal surface heat treatment, and discloses a fixed inductor for high-speed rail axle surface induction quenching, which comprises a busbar, a fixed plate, a cooling water sprayer and an effective geometry heating ring, the busbar is used for fixing the effective geometry heating ring and forms an electrifying passage and a water passing passage with the effective geometry heating ring with the hollow structure; the effective geometric body heating ring comprises three sections of straight section induction pipe bodies with different lengths and two sections of arc induction annular bodies, the straight section induction pipe bodies are arranged according to the lengths D1, D2 and D3, the straight pipe section D1 and the straight pipe section D2 are in arc transition through an R1, the straight pipe section D2 and the straight pipe section D3 are in arc transition through an R2, and the three straight pipe sections are parallel to one another and progressive inwards layer by layer; and the radians of the two sections of arc induction annular bodies are 90 degrees. According to the invention, one-time and global synchronous induction heating can be carried out on multiple sections of shaft necks and transition R-angle areas with complex geometrical shapes and obvious stress concentration at the two ends of the axle.

The invention relates to the technical field of machining and manufacturing of rail transit machinery, and discloses full-automatic equipment for induction quenching of the surface of a high-speed rail axle, which comprises a feeding workbench, a loading and unloading device, a vertical quenching machine tool, a dynamic adjustable spray quenching device, a tempering transmission device, a safety protection device and a main control electric cabinet, the middle scanning type induction quenching device and the two-end fixed type induction quenching device are arranged on the front side and the rear side of the axle vertical jacking device respectively. Automatic feeding and discharging and accurate positioning of the axle are achieved through the feeding and discharging device, and full-automatic heat treatment of axle surface quenching is achieved in combination with the vertical quenching machine tool and the multiple induction quenching devices in the vertical quenching machine tool. According to the equipment, the problems of low efficiency, unstable axle clamping position precision, unstable product quality, high manual labor intensity and the like caused by manual operation are effectively solved, and the production efficiency, the product percent of pass and the quality stability are remarkably improved.

The invention relates to a heat treatment process of a bearing ring with high impact resistance, which comprises the following steps: step 1, pretreatment: quenching and tempering the bearing ring by adopting a mesh belt type heat treatment furnace, and carrying out quenching in five regions in sections; 2, medium-frequency heat treatment: 1) an induction heating process: heating in an inner induction coil oscillation mode; and (3) the bearing ring in the step (2) is overturned by 180 degrees and then placed into the induction heating device again, the step (1) and the step (2) are repeated, and the method is completed. The method has the advantages that the depth of the induction quenching layer of the ferrule is optimized, an effective gradient buffer area is ensured to be formed, and the stress distribution uniformity under the impact load is enhanced; surface layer hardness, secondary surface layer hardness distribution and core hardness distribution are optimized, and wear resistance and crack resistance are both considered; a set of standardized heat treatment parameter windows (including heating power, time, cooling mode and tempering system) is formed, and the fracture rate of an optimized sample piece is reduced by more than 50%.

This invention discloses a dual-frequency composite induction strengthening process for medium carbon steel, gradient hardened layer parts, and a production system. The process includes: selecting SAE 1045 medium carbon steel and performing quenching and tempering pretreatment; precision machining to form outer circular channels and inner ball channels; performing dual-frequency composite induction hardening on the outer circular channels and inner ball channels respectively, i.e., preheating to 680-750℃ with medium-frequency current, then rapidly heating to 880-920℃ with high-frequency current followed by spray cooling, and using thermal balance control to form a gentle transition zone with a width of 2-5mm between the two hardened zones, where the hardness gradient along the axial line connecting the two hardened zones does not exceed ΔHRC10 / mm; finally, low-temperature tempering. This invention also discloses wear-resistant parts with a dual-layer composite hardened layer structure and a gradient transition zone prepared using this process, as well as an online composite strengthening production system. This invention replaces low-carbon alloy steel with medium-carbon steel and replaces overall carburizing with local dual-frequency induction hardening, which can reduce raw material costs and energy consumption, reduce deformation, and obtain a hardened layer that meets the depth requirements, thus realizing online continuous production of heat treatment and machining.

The application discloses a composite modification process of a high-toughness wear-resistant cutter ring for a shield tunneling machine, and comprises the following steps: step one, a medium-carbon alloy steel material is used as a cutter ring base body, and a blank is prepared by using a hot forging process; step two, the blank obtained in the step one is subjected to carburizing quenching treatment, and then is subjected to oil cooling; step three, the cutter ring after the oil cooling in the step two is subjected to high-temperature tempering treatment, so that unstable martensite after quenching is completely converted into tempered martensite; step four, the cutter ring after the high-temperature tempering in the step three is subjected to surface induction quenching; step five, the cutter ring after the induction quenching in the step four is subjected to low-temperature tempering treatment; and step six, the cutter ring after the low-temperature tempering in the step five is subjected to surface layer ultrasonic impact modification, so as to obtain a composite modified cutter ring. The application uses heat treatment processes such as carburizing and nitriding and ultrasonic impact modification, and constructs a gradient structure cutter ring, so that the cutter ring has high wear resistance, buffer resistance and impact toughness.

The invention relates to a high-nitrogen stainless steel tapered roller bearing outer ring induction quenching device and method, and belongs to the technical field of heat treatment.The high-nitrogen stainless steel tapered roller bearing outer ring induction quenching device comprises a rack and an inductor arranged at the lower end of the rack, the inductor is in a conical ring shape, and the inductor is arranged in a tapered roller bearing outer ring and used for quenching a roller path in the tapered roller bearing outer ring; a conical annular groove facing the roller path is formed in the outer surface of the inductor, the conicity of the conical annular groove is the same as that of the roller path, a liquid spraying device used for spraying quenching liquid is arranged at the lower end of the inductor, and the liquid spraying device can spray the quenching liquid to the roller path. The induction quenching device can solve the problems that due to an existing induction quenching device, the shape of the hardened layer of the outer ring raceway of the tapered roller bearing is different in depth, and the intermediate metallographic structure of the outer ring raceway of the tapered roller bearing is overheated.

This invention discloses a continuous induction hardening device for sprockets, belonging to the field of hardening technology. It includes a hardening frame filled with coolant; a hardening section installed inside the hardening frame for induction heating of the sprocket; and a loading section installed at the bottom of the hardening frame for picking up and feeding the sprocket. In this device, the induction coil is curved to match the arc-shaped tooth profile of the sprocket. The upper and lower effective heating sections correspond to the upper and lower tooth roots, respectively. The heat source preferentially acts on the thicker part of the tooth root, ensuring sufficient heat input. Simultaneously, a rotary motor drives the sprocket to rotate. For sprockets with greater thickness, a side coil can be added to assist in heating the tooth sides, avoiding the problem of overheating in the main heating zone and insufficient heating of the side walls. This improves upon existing circular induction coils where the tooth tip heating rate is much faster than the tooth root during hardening, effectively reducing the risk of hardening cracks caused by the significant difference in heating rates and improving the quality of the finished sprocket.

The present application relates to the crankshaft machining process of cold header, belongs to the steel processing technical field.The crankshaft machining process of cold header disclosed by the present application has the following specific steps: raw material is firstly subjected to forging-normalizing-rough turning-quenching and tempering-precision turning-coarse grinding-induction hardening-milling-drilling-nitriding treatment-shallow cooling treatment-low temperature tempering-precision grinding to obtain the product.The induction hardening step makes the material generate the microstructure with acicular martensite as the hardened layer and tempered sorbite as the matrix, the surface forms the nitriding layer after the nitriding treatment, and the precipitation of carbide is improved through the shallow cooling treatment and low temperature tempering, the material microstructure is regulated through each step, and finally the crankshaft component with the combination of high surface strength and high internal toughness is obtained, which exhibits excellent wear resistance and high fatigue strength.

This technology improves the manufacturing efficiency of steel materials by enhancing cold forgeability and increasing the efficiency of high-frequency induction hardening while ensuring the necessary strength. [Solution] The steel material has a chemical composition comprising C: 0.30% to 0.45%, Si: 0.01% to 0.30%, Mn: 0.01% to 1.10%, Ni: 0.01% to 0.60%, Cr: 0.01% to 0.60%, Ti: 0.060% or less, and B: 0.0030% or less, with the remainder being Fe and unavoidable impurities, and has a cylindrical shape with radius r, and the hardness at a depth of r / 2 radially from the surface of the cylindrical shape is 185 HV or less, and the tensile reduction value obtained in a tensile test is 50% or more, and the ratio of the depth t from the side surface where the hardness is 400 HV to the radius r is 0.30 or less.

A shaft rod workpiece deformation limiting mechanism assembly of a shaft rod type induction quenching machine tool belongs to the field of heat treatment equipment and comprises a lead screw, one end of the lead screw is in threaded connection with a lead screw nut, an optical axis part of the lead screw is arranged in a through hole of a fixing plate in a penetrating manner, and the other end of the lead screw extends out of the through hole; the lead screw supporting seat is fixed at the end part of the through hole of the fixed plate, a bearing which is axially limited is arranged in the lead screw supporting seat, and the lead screw penetrates out of the bearing; the roller mounting seat is relatively and fixedly connected with the fixing plate, and a pair of freely rotating rollers is arranged at one end, deviating from the lead screw nut, of the roller mounting seat side by side; the position adjusting plate is provided with a vertical plate surface and a horizontal plate surface, the vertical plate surface is used for being connected with the shaft lever type induction quenching machine tool, the horizontal plate surface is used for being fixedly connected with the fixing plate through bolts, a bolt connecting hole in the horizontal plate surface or the fixing plate is an adjusting long hole, and the length direction of the adjusting long hole is parallel to the lead screw. The deformation limiting device can meet the deformation limiting capacity of different types of shaft rod workpieces under the complex quenching working condition.

1. The name of the design product: machine tool protective cover. 2. The use of the design product: the design product is used for the induction quenching machine tool protection. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: perspective view. 5. The bottom of the design product is not easy to see or not visible during use, omit the top view.

Essentially, an invention deals with a method for performing a process on a part. (P) which is made from a group of ferrous metals consisting of: The nitriding action that forms on the part(P) is a composite layer(2) of considerable thickness. Between 5 and 30 micrometers and the diffusion area (3) which is located below and Contact with the composite layer (2) with a thickness between 100 micrometers and 500 micrometers; Next, The operation of wet hardening of part (P) by induction at high frequency throughout. A deep induction hardening of 0.5 mm or more is required for this process. The part (P) and it is to make that part (P) have: Surface hardness greater than or equal to 50HRC. Hardness of the aggregate layer (2) greater than or equal to 400HV0.0s, The hardness of the part is greater than or equal to 500HV0.05 at a depth of 500. micrometer, And since the high-frequency induction hardening process is performed without... Apply a protective film to the part (P) before induction hardening. The invention also involves a part (P) which is made of ferrous metals. Significant resistance to wear by abrasion and adhesion; possesses friction properties. And it has improved scratch resistance and excellent corrosion resistance;

The utility model discloses a detachable external tooth induction quenching device which comprises an upper cover ring plate and a lower cover ring plate which are oppositely arranged, a copper plate coil and a water baffle are arranged between the upper cover ring plate and the lower cover ring plate, the copper plate coil is arranged on the inner side of the water baffle, and clamping grooves are formed in the inner sides of the upper cover ring plate and the lower cover ring plate. Two parallel busbars are arranged in the clamping groove in a clamped mode, the two ends of the copper plate coil are fixedly connected to the busbars in a welded mode respectively, the two ends of the water baffle are connected to the busbars in an insulated mode respectively, a plurality of spraying holes are formed in the copper plate coil in an arrayed mode, and a water storage cavity is defined by the upper cover ring plate, the lower cover ring plate, the water baffle, the copper plate coil and the busbars at the two ends. A plurality of quick connectors communicated with the water storage cavity are arranged on the upper cover annular plate, and the upper cover annular plate and the lower cover annular plate are detachably connected in a locking mode through first bolts. The detachable external tooth induction quenching device is simple in structure, convenient to detach and capable of being detached, cleaned and maintained at any time, and the service life is prolonged.

The invention discloses a high-frequency induction quenching method for a guide rail. The method comprises the following steps that firstly, the depth of a full decarburized layer of the guide rail is measured and removed, then the guide rail is subjected to high-frequency induction quenching treatment and tempering treatment, and finally, the depth of an effective hardened layer of the guide rail subjected to heat treatment is measured and metallographic detection is conducted. By means of the guide rail induction quenching method, the heat treatment efficiency of the guide rail can be remarkably improved, a high-hardness and evenly-distributed hardened layer is obtained on the surface of the guide rail, the surface hardness is 700 HV or above, the effective hardened layer depth is larger than 2 mm, the guide rail is small in deformation, the core of the guide rail keeps excellent strength and toughness, and the size consistency and impact resistance of the guide rail are guaranteed.

The present application belongs to the field of heat treatment device, and relates to a double-inductor device suitable for induction quenching of right-angle surface cast iron guide rail. The device comprises a preheating inductor and a quenching inductor, and the preheating inductor is fixedly connected with the quenching inductor. The preheating inductor comprises a preheating inductor connecting row, and preheating inductor water nozzles are arranged on both sides of the preheating inductor connecting row. The preheating inductor connecting row is fixedly connected with a preheating inductor fixed plate, the preheating inductor fixed plate is fixedly connected with a preheating inductor support, a preheating inductor induction coil is fixedly arranged on the preheating inductor support, a preheating inductor magnet is fixedly arranged on the preheating inductor induction coil, the preheating inductor induction coil comprises a first preheating inductor coil and a second preheating inductor coil, and the first preheating inductor coil and the second preheating inductor coil are connected perpendicularly. The two inductors are used in cooperation, the depth of the hardened layer of the guide rail is increased, and the device is particularly suitable for induction quenching of the position of the right-angle guide rail of the machine tool cast iron.

The utility model relates to the technical field of induction quenching, in particular to an integral inductor for heat treatment of a long-handle inner ball cage, which comprises an inductor body, a rotary drum and a fixing component, the inductor body comprises a working section and a fixed section, the shape of an inner cavity of the working section is consistent with that of a workpiece, the working section is composed of a copper pipe and a magnetic conductor, a rotating cavity is formed in the fixed section, an extrusion groove is formed in the rotating cavity, and a rotating cylinder is rotationally installed in the rotating cavity; a mounting groove is formed in the rotary drum, the mounting groove penetrates through the rotary drum, a fixing assembly is arranged in the mounting groove, the fixing assembly is used for fixing the handle end of a workpiece, overall synchronous quenching is achieved through the overall inductor, the machining efficiency is improved, meanwhile, the unification of the machining rotating speed and the fixing effect is achieved through the fixing assembly on the rotary drum, and the machining efficiency is improved. And the quenching stability is guaranteed, and the machining quality is improved.

This invention discloses a lightweight manufacturing method for axles with built-in axle boxes, belonging to the field of rail transit axle technology. Based on the existing axle box-integrated alloy steel quenched and tempered axle design, this invention enlarges the central through-hole of the axle; then, the axle surface undergoes induction hardening treatment; followed by tempering treatment and grinding of the axle end faces and outer surfaces. This invention enables lightweight axle design and manufacturing, reducing the overall axle weight by 96.2 kg. The induction hardening treatment of the axle surface in this invention improves surface hardness and strength, enhancing resistance to external impacts and wear; the introduction of residual compressive stress on the axle surface can prevent or inhibit crack propagation; therefore, the method of this invention can achieve lightweighting while improving the axle's overall service life safety.

The invention discloses induction heat treatment high-carbon gear steel, and belongs to the technical field of machine manufacturing. The gear steel comprises the following chemical components in percentage by mass: 0.705%-0.995% of C, 0.5%-2.5% of Si, 0.1%-0.5% of Cr, 0.010%-0.3% of Mo, 0%-0.3% of Cu, 0%-0.2% of V, 0%-0.02% of Ti and O < lt >. 30 ppm, S < lt >; 0.025%, P < lt >; 0.025%, and the balance being Fe. The material is subjected to vacuum melting to obtain a cast ingot, then the cast ingot is heated to 1050-1100 DEG C for complete austenitizing and heat preservation to achieve alloy component homogenization, then the cast ingot is continuously forged into the needed size in the cooling process, and the final forging temperature is controlled to be 850-900 DEG C. The forge piece is heated at 780-820 DEG C, subjected to heat preservation for 1-8 hours, cooled to 600 DEG C at the cooling speed of 20 DEG C / min and then discharged out of a furnace, and a structure with spherical cementite distributed on a ferrite matrix can be obtained; or heating and normalizing at 850 DEG C to obtain a pearlite structure. After induction quenching, the surface hardness of the steel plate can reach 62-64 HRC, and the depth of a hardening layer is 0.5-5 mm. The surface structure is characterized by comprising carbide with the average size of 0.3-0.6 mu m, martensite with the length of 0.5-2 mu m and a fine grain structure with the length of 7-15 mu m.

The invention relates to the technical field of machine manufacturing, and discloses a gear tooth groove induction quenching ball head dynamic angle guiding device, which comprises a fixed seat, a mechanical arm, a mounting seat and a plurality of ball heads, a servo motor drives a thread roller to rotate and is combined with cooperative control of the mechanical arm to adjust the positions of the ball heads, different helical angles can be adapted, automatic angle adaptation is realized, and the angle of the ball heads is adjusted. The ball head adopts a special curvature design and can be automatically switched to adapt to tooth grooves with different depths through a contact area, a first movement disc and a second movement disc in an assembly cylinder and an oil system form a buffer mechanism, oil flows between the movement discs through flowing holes, stable damping is provided, contact chattering is avoided, contact force changes are transmitted to a pressure sensor through a feeler lever, and the pressure sensor is in a closed state. The control system adjusts the oil amount through the oil pipe, large-range positioning of the mechanical arm and fine regulation and control of the assembly are matched, micron-order precise control over the contact force is achieved, the device can be automatically adjusted and dynamically respond to thermal deformation of the gear ring, the adaptability is high, and the overall production quality and efficiency are improved.

The application discloses a kind of assembled plum blossom head roller and preparation method thereof, the field of roller manufacturing technology, plum blossom head is stepped cylinder, the end face of roller main neck is provided with and plum blossom head stepped cylinder is matched with stepped cylindrical hole, the big end cylinder of plum blossom head is provided with plum blossom groove, bolt through hole is provided in each plum blossom groove side end face, and plum blossom head is connected to main neck by bolt.The application is fixed and connected by key, interference fit, high-strength bolt and other various connection modes to connect plum blossom head and the end face of main neck, ensure the connection strength, plum blossom head uses alloy forged steel material, plum blossom groove arc surface has higher hardness after induction quenching, improve wear resistance, so as to reach the same life as roller body, and the method of the application can also be applied to the repair of plum blossom head wear of original integral plum blossom head roller, avoid resource waste, prolong the use time of original roller.

The invention discloses a medium carbon steel train axle and a production method thereof, and belongs to the technical field of train axles, and the production method comprises the following steps: uniformly heating a continuous casting billet to a temperature above a plastic deformation temperature, and carrying out heat preservation; carrying out rough rolling and finish rolling on the heated continuous casting billet, and then sequentially carrying out water cooling and air cooling to obtain a rolled billet; the rolled blank is machined, and the axle is obtained; carrying out induction quenching heat treatment on the axle neck part of the axle; tempering the axle subjected to induction quenching heat treatment; the tempered axle is subjected to shot peening strengthening treatment; the weight percentage of the carbon element in the medium carbon steel train axle is 0.28-0.60%; compared with a traditional production process, the production method provided by the invention has the advantages that an axle forging forming procedure is omitted, a high-quality axle product is obtained by directly machining and forming round billet continuous casting, round billet rolling and machining in combination with a tempering heat treatment and surface strengthening process, the production cost is reduced, and the manufacturing efficiency is improved.

The invention discloses a large-scale wind power inner gear ring induction quenching process, and relates to the technical field of wind power gear boxes, the large-scale wind power inner gear ring induction quenching process comprises a detection table, S1, gear ring placement: firstly, placing a gear ring at the top end of a base; s2, fixing the gear ring: the gear ring placed at the top end of the base is clamped and fixed at the top end of the base through a side clamping plate, a front clamping plate and a rear baffle plate at the top end of the base; and S3, the heating device extends into the inner gear ring, specifically, an electric push rod pushes a push rod to descend downwards, and a second servo motor at the bottom end of the push rod, a rotary disc and a walking induction box extend into the inner gear ring. The first joint, the pressure spring and the second joint elastically extend to be close to the surface of the inner gear ring; the walking induction box extending into the inner gear ring is driven by a second servo motor to rotate and slowly move along the surface of the inner gear ring, in the moving process of the walking induction box, the U-shaped high-temperature copper pipe is used for conducting high-temperature quenching on the surface of the inner gear ring, then cooling is conducted along with air, and quenching of the inner gear ring is completed.

Disclosed herein is an example track pad (112) having a ground-contacting portion (202) for use in a track-based machine (100) to propel and support the machine (100) across a supporting surface. The track pad (112) may be a track pad (112) that forms a link of a chain forming the track (102) for the track-based machine (100). The track pad (112) includes a cast body (114) formed of a first alloy steel having a first strength and toughness. The track pad (112) includes a roll path (116) that contacts a roller (502) of the track-based machine (100). The roll path (116) is hardened through an induction hardening process to achieve a hardness level at a depth of 32 millimeters or more from the surface of the roll path (116). The roll path (116) is shaped and positioned to contact rollers (110) of the track drive assembly and thereby reduce wear and fatigue on the track pad (112) as a result of contact and force transferred through the roller (502).

This invention discloses an induction hardening device for machining bevel gear shaft workpieces, belonging to the technical field of heat treatment processing equipment. The device includes a housing with a partition inside. A multi-station turntable is located above the partition, and a frame is connected to the top of the turntable. Along the circumferential direction of the multi-station turntable, there are bevel gear preheating stations and overall heating stations. Each station has a corresponding lower center assembly, and an upper center assembly is located above each station. The upper center assemblies are mounted on the frame via an elastic floating mechanism and are coaxially engaged with the lower center assemblies. This invention achieves uniform hardening of bevel gear workpieces through a differentiated station layout and adapts to the thermal deformation of the workpiece through the elastic floating mechanism, effectively improving the coaxial arrangement and mutual cooperation in the direction. This invention achieves differentiated heat treatment of bevel gear workpieces, ensuring the consistency of the hardened layer depth and adapting to the thermal expansion and contraction deformation of the workpiece, thus avoiding workpiece damage.

The application relates to the technical field of heat treatment devices, in particular to a motorcycle crankshaft connecting rod induction quenching and tempering integrated device and a processing method, which comprises a rack, further comprises a partition processing assembly; the partition processing assembly comprises rotating discs, belt rotating mechanisms, connecting racks, induction heating plates, region adjusting members, position adjusting members and cooling members; two rotating discs are rotatably arranged on the two sides of the rack, two groups of belt rotating mechanisms are connected with the two rotating discs respectively, two connecting racks are fixedly arranged on the inner side of each rotating disc, the induction heating plates are connected with the corresponding connecting racks through the position adjusting members, the region adjusting members are connected with the connecting racks, the position adjusting members are connected with the induction heating plates, and the cooling members are arranged on one side of one of the rotating discs; the quenching and tempering processing region range can be adjusted according to the size type of the crankshaft connecting rod which needs to be processed, so that the local quenching and tempering effect is better during actual processing.

The invention belongs to the technical field of precision machine manufacturing and material heat treatment, and particularly relates to a heavy-load ball screw deep cooling machining method which comprises the steps that S1, a lead screw blank is pretreated, specifically, a lead screw made of 20CrMnMoA or 20CrMnTiH steel is selected and sequentially subjected to carburizing and quenching, straightening, high-temperature tempering and quenching; s2, pretreatment of a nut blank, specifically, a nut made of GCr15 steel is selected and subjected to spheroidizing annealing, thermal refining, straightening, high-temperature tempering and surface induction quenching in sequence; s3, collaborative subzero treatment: carrying out subzero treatment on the lead screw blank pretreated in the S1 and the nut blank pretreated in the S2; and S4, low-temperature tempering is conducted, specifically, the workpiece subjected to subzero treatment is subjected to low-temperature tempering. According to the material characteristic difference of the lead screw and the nut in the heavy-load ball screw pair, a differential pretreatment process and a unified collaborative subzero treatment scheme are designed, synchronous optimization of the overall performance of the lead screw pair is achieved, and the problem that in the prior art, a targeted process is lacked is solved.

The utility model discloses a high chromium steel ball surface hardening treatment device relates to high chromium steel ball surface processing relevant field, for solving the problem of the steel pipe rotation along the steel pipe when the heating of prior art, and the stable movement position of rotating axle, and the uneven heating of the front and rear end point and the middle of the outer surface, lead to the problem of the inconsistent hardness of steel ball surface. A plurality of induction quenching units are arranged on the upper end of the supporting bottom plate from front to back, the induction quenching unit includes eddy current heating cylinder and cooling quenching cylinder, the upper end of the eddy current heating cylinder is fixed with the ball inlet pipe on the side away from the cooling quenching cylinder, the inside of the eddy current heating cylinder forms the feed zone along the lower end of the ball inlet pipe, the other side of the inside of the eddy current heating cylinder forms the heating zone, the inside of the cooling quenching cylinder forms the cooling zone, the heating zone and the cooling zone are fixed with the spiral piece together, and the spiral piece spirally downward along the inclined direction of the eddy current heating cylinder and the cooling quenching cylinder.

The application discloses an adjustable induction quenching system for a linear guide rail and a quenching method, and belongs to the technical field of quenching processing. The induction quenching system is mainly used for solving the problem that the quenching quality of the linear guide rail is affected by the position distance error between an inductor and the linear guide rail when the linear guide rail is quenched in the prior art. The system comprises the inductor, a first fixing device and a second fixing device. The first fixing device comprises a distance adjusting module, and the second fixing device comprises an angle adjusting module. The distance adjusting module and the angle adjusting module can adjust the position distance between the inductor and the linear guide rail. The adjustable induction quenching system for the linear guide rail and the quenching method can maintain the distance between the inductor and the linear guide rail in a constant value during the induction quenching process, realize the uniformity of the temperature field and austenitizing of two side surfaces of the linear guide rail during the induction quenching process, and thus the induction quenching quality of the linear guide rail is improved.

The invention discloses a thermal mechanical treatment device for strengthening a hot die forging crankshaft. The thermal mechanical treatment device comprises a heat insulation shield, a device platform, an induction quenching module, an ultrasonic rolling / impacting module and a direction adjusting device. The induction quenching module is used for locally and rapidly heating the fillet area of the crankshaft through arc-shaped induction heating coils symmetrically arranged on the two sides, and precise hardening is achieved by combining spray cooling of a multi-directional nozzle; the ultrasonic rolling / impacting module is provided with a replaceable tool head and an amplitude-change pole, can be driven by a servo motor to move along a guide rail, and applies high-frequency impact or rolling load to a fillet area. The direction adjusting device adopts a gear-rack linkage mechanism, so that the ultrasonic impact head dynamically keeps a vertical action angle with a fillet tangent to adapt to different curvature radiuses. According to the device, a high-hardness strengthened layer and a gradient-distributed deep residual compressive stress field are formed in a transition fillet area through a thermal-mechanical synergistic process, the surface roughness is synchronously reduced, and the anti-fatigue performance and the service reliability of the crankshaft are remarkably improved.