78results about How to "Guarantee the quality of quenching" patented technology

The invention relates to a large-size steel mandril structure thinning control method for improving the performance of a base body, belonging to the field of steel material manufacturing technique control technology. The method mainly comprises structure thinning treatment for mandril billet in the production process of a mandril by a thigh channel as well as quenching treatment-thinned and hardened structure of finished products of the mandril, namely, all performances of the mandril can be improved by technical way of double thinning structure. The large-size steel mandril manufactured by the method has higher impact toughness, better heat stability and higher thermal fatigue resistance.

The invention provides a method for controlling flow fields in a quenching water tank of a large cylindrical workpiece. The method comprises the step of simultaneously forming an inlet communicated with quenching liquid outside the water tank and an inner spraying nozzle jet flow field performing spraying towards the inner lateral wall of the workpiece in an inclined and upward mode, an inlet communicated with the quenching liquid outside the water tank and an outer spraying nozzle jet flow field performing spraying to the outer side of the workpiece from bottom to top, and an inlet communicated with the top of the water tank and a propeller stirring jet flow field performing spraying towards the outer lateral wall of the workpiece in an inclined and upward mode. The workpiece quenching process is adjusted by adjusting the inner spraying nozzle jet flow field, the outer spraying nozzle jet flow field and the propeller stirring jet flow field. By means of the method, the structures of the flow fields in the quenching water tank can be controlled according to the size and the quenching requirements of the workpiece, so that quenching media around the cylindrical workpiece have equal and appropriate flow velocity and can circulate in the quenching water tank well, and quenching quality of the large cylindrical workpiece is ensured effectively.

The invention relates to a heat treatment method of an M2 high-speed steel work roller, and belongs to the technical field of roller heat treatment. The method comprises the following process steps of(1) primary preheating, wherein the roller is heated by a heat treatment furnace at the speed ranging from 50 DEG C / h to 200 DEG C / h till the temperature ranges from 500 DEG C to 600 DEG C, and heatpreservation is carried out; (2) secondary preheating, wherein the roller continues to be heated at the speed ranging from 50 DEG C / h to 200 DEG C / h till the temperature ranges from 800 DEG C to 900 DEG C, and heat preservation is carried out; (3) high-temperature heating, wherein the roller is heated at the speed ranging from 50 DEG C / h to 100 DEG C / h till the temperature ranges from 1140 DEG C to 1210 DEG C, and heat preservation is carried out; (4) cooling, wherein the roller subjected to high-temperature heating and heat preservation is cooled by a water-based quench bath, the roller is vertically placed into the water-based quench bath to be cooled till the temperature ranges from 300 DEG C to 400 DEG C; and (5) tempering treatment, wherein the cooled roller is heated till the temperature ranges from 540 DEG C to 560 DEG C, after heat preservation is carried out for 3 h to 10 h, air cooling is carried out to room temperature, and tempering treatment is carried out several times. By means of the heat treatment method, the quenching stress state can be improved, and the quenching quality can be guaranteed.

The invention relates to the field of metal heat treatment, and provides a premixed spray quenching system for steel rail, aiming at online waste heat quenching and offline full-length quenching treatment of steel rail. The system is the improvement on wind spray quenching equipment, and has the following characteristics: several groups of atomizing and humidifying nozzles are arranged on an air inlet pipe of the wind spray quenching equipment; the atomizing and humidifying nozzles are connected to the air inlet pipe through a bolt and a flange and are sealed; atomized mist is sprayed into the air inlet pipe by the atomizing and humidifying nozzles, and mixed with the compressed air in the air inlet pipe; and the compressed air containing mist is sprayed onto the steel rail by an wind spray nozzle of the air inlet pipeline. The premixed spray quenching system for steel rail has advantages of wind spray quenching and mist spray quenching of steel rail and overcomes their disadvantages, and can ensure the quenching quality of steel rail; besides, the system has low noise, low energy consumption and low processing cost, and can be used for off-line quenching of steel rail, especially for online slack quenching of steel rail.

The invention provides a set of equipment used for realizing rapid and uniform cooling of castings, reducing deformation of castings and improving mechanical properties in quenching processes of large complex thin-wall aluminum alloy castings.

The invention discloses a high-temperature solid smelting furnace quenching machine with accurate control, high safety and reliability and smooth operation. The quenching machine comprises a form-relieved tooth, a form-relieved tooth carrier, a lifting guide rail internal bracket, a fixed guide rail bracket, a form-relieved tooth lifting chain and chain wheel assembly, a form-relieved tooth hoist cylinder, a truck body, a truck entry and exit furnace fuel cylinder, a truck advancing hydraulic motor, a truck entry and exit furnace earth-fixed baffle, a truck main hydraulic system and an auxiliary hydraulic system, wherein the form-relieved tooth is installed on the form-relieved tooth carrier, the form-relieved tooth carrier can move up and down in the lifting guide rail internal bracket through roller wheels, and the lifting guide rail internal bracket can move up and down in the fixed guide rail bracket through the hoist cylinder; the truck is driven by a rear wheel hydraulic motor before entering the furnace, and furnace entrance and exit are completed by the truck entry and exit furnace fuel cylinder. The truck is provided with the hydraulic systems which provide power for the advance, the exit and the lifting of the truck. The quenching machine is mainly applicable to the quenching of various blanks in steel mills.

The invention relates to an electrical control device of a vertical jet quenching machine tool. The electrical control device comprises an upper computer, a control master station and multiple collection substations, wherein the upper computer is connected with the control master station, and the control master station is connected with each collection substation; the upper computer comprises a setting unit, the collection substations are distributed around the vertical jet quenching machine tool and connected with actuators of the vertical jet quenching machine tool respectively, and each actuator of the vertical jet quenching machine tool comprises a coder and a displacement sensor. By the aid of the electrical control device, water jet reducing and spray reducing can be controlled accurately, and quenching quality of heat treatment workpieces is guaranteed.

The invention relates to a superaudio large-power quenching numerical control machine tool energy parameter and technological parameter management device, comprising a switching value preprocessing unit, an analog quantity preprocessing unit, a first controller, a second controller, and an input / output unit. The switching value preprocessing unit is electrically connected with the first controller, and the switching value preprocessing unit comprises a switching value input module and a switching value output module. The analog quantity preprocessing unit is electrically connected with the first controller, and the analog quantity preprocessing unit comprises an analog quantity input module and an analog quantity output module. The first controller is connected with the second controller through an RS232 interface, so as to realize startup, stop, remote control, close control, data input, and data storage. The input / output unit comprises an LCD module, a keyboard input module, and a key input module. The device is reasonable in structure and design, good in anti-interference capability, and ensures technological parameter and stability of energy parameters, and improves energy efficiency, operation intelligence, and reliability of part quenching numerical control integrated equipment.

The invention provides a rotary spraying quenching device and a rotary spraying quenching method for high-chromium wear-resistant iron castings. The rotary spraying quenching device comprises a base,wherein a plurality of rotary disc support assemblies are arranged at the top of the base in a manner of uniform distribution, a rotary disc device is supported at the top of each rotary disc supportassembly, and each rotary disc device is connected with a rotary power device at the bottom of the rotary disc device, and drives the rotary disc device to rotate; and a first support frame device isarranged on the side surface of each rotary disc device, a plurality of spraying devices used for spraying are adjustably installed at the top of each first support frame device, and are connected with a water source through a water supply pipe. The equipment is capable of realizing an integrated quenching technique process for the high-chromium castings, replaces the traditional manual quenchingcontrol manner, and then increases the working efficiency and optimizes the quenching technique process; and meanwhile, the quality of the castings is greatly improved, the rate of unqualified products is lowered, and the surface wear resistance of the high-chromium castings is greatly improved.

The invention discloses a method for quenching shafts, which is induction-heated with intermediate frequency and quenched in quenchant. A material pushing device, a placing board, an outleting device and a turning device is fixed sequentially on the benchboard of the equipment for quenching. A quenching box is fixed under the benchboard. A transmission chain is close to one end of the turning device. The inferior part of the transmission chain is in the quenching box. The transmission chain is driven by the drive system. The responding device is connected with intermediate frequency power, pushing device, sensing device, reversing device,quenching box and drive system are connected with adaptive control system. The method is easy to operate and can guarantee product quality.

The invention discloses an inner hole quenching inductor for a dual-conical-surface bearing sleeve ring. The inner hole quenching inductor comprises a quenching transformer, a bus bar and a water spray box, wherein the front end of the bus bar is connected with the quenching transformer; the water spray box is fixedly fixed at the tail end of the bus bar; an upper arc-shaped effective ring and a lower arc-shaped effective ring are arranged at the tail end of the bus bar; magnetizers are arranged on the upper arc-shaped effective ring and the lower arc-shaped effective ring; and the upper arc-shaped effective ring and the lower arc-shaped effective ring are separately used for heating upper and lower conical surfaces of the bearing inner ring. The inner hole quenching inductor adopts two fan-shaped inductors which are arranged up and down to complete quenching of upper and lower conical surfaces of the bearing inner ring once, so that the process is simplified, the production cost is reduced, and quenching quality is guaranteed.

The invention relates to a passing type steel pipe hardening and tempering production line and an application method thereof. The production line comprises a furnace entering roller way of a quenchingfurnace, a quenching roller way, the quenching furnace, an annular quenching device, a furnace discharging roller way of the quenching furnace, a water blowing device, a furnace entering roller way of a tempering furnace, a tempering roller way, the tempering furnace and a furnace discharging roller way of the tempering furnace, wherein a steel pipe is conveyed into the quenching furnace throughthe furnace entering roller way of the quenching furnace, and is heated in the quenching furnace; the annular quenching device performs quenching; then, the steel pipe is output from the furnace discharging roller way of the tempering furnace; the water blowing device dries the cooling water on the surface of the steel pipe through blowing and then performs tempering through being conveyed into the tempering furnace to be tempered from the furnace entering roller way of the quenching furnace and the tempering roller way; the steel pipe is then output from the furnace discharging roller way ofthe tempering furnace. The production line has the advantages that the structure is simple; the investment cost is low; the occupied area is small; the furnace entering roller way of the quenching furnace, the quenching roller way, the quenching furnace and the furnace discharging roller way of the quenching furnace are in inclined arrangement in a way of forming an angle being 1 degree; a spray nozzle of the annular quenching device and the steel pipe operation direction are respectively inclined for 5 degrees; quenching water sputtering and backflow into the quenching furnace can be prevented; the quenching furnace is protected; the steel pipe quenching quality is ensured.

The invention belongs to the technical field of grinding ball heat treatment, and particularly relates to a nodular cast iron grinding ball quenching device. The nodular cast iron grinding ball quenching device comprises a water box, and the side wall of the water box is symmetrically and fixedly provided with servo motors; screws are fixed to the ends of output shafts of the servo motors, the surfaces of the screws are in threaded connection with slide blocks, and a rectangular block is fixed between the two slide blocks; and the top end of each rectangular block is provided with downward through holes at equal intervals in the length direction of the rectangular block, and the bottoms of the through holes are provided with first spray pipes at equal intervals in the circumferential direction of the through holes. According to the nodular cast iron grinding ball quenching device, by arranging an air compressor and the first spray pipes, high-speed gas is sprayed out from the first spray pipes, thus, grinding balls are in a suspension state under action of the high-speed gas, accordingly, the grinding balls are uniformly cooled in the process of making contact with air and water, the problem that heat transfer is uneven due to the fact that the grinding balls make contact with parts, and the quenching quality of the grinding balls is ensured.

The invention relates to a quenching device for a tooth surface of a chain wheel, and the quenching device comprises a support, wherein a horizontal shaft is fixed on the top of the support through a bearing seat, and one end of the horizontal shaft is connected with an elevation motor through an elevation speed reducer; a cooling box with an opened top part is arranged below the support, two sliding chutes are symmetrically formed on both sides inside the cooling box, two ends of the a support plate are clamped in the two sliding chutes, the lower end of a steel rope wrapped around the horizontal shaft is fixedly connected with the support plate, a chain wheel shaft is vertically arranged on the supporting plate, the chain wheel shaft is connected with one end of an intermediate shaft through a first conical gear set, the other end of the intermediate shaft is connected with the vertical shaft of a key groove through a second conical gear set, and the upper end of the vertical shaft of the key groove is connected with a chain wheel rotation motor through a chain wheel rotation speed reducer; and a heating ring is arranged at the upper part, corresponding to the chain wheel shaft,of the cooling box, and the heating ring is connected with a heating device arranged at one side of the cooling box. The quenching device provided by the invention is convenient to use, has short production process, and can be used for reducing the labor intensity, saving time and labor, ensuring the quenching quality and increasing the production efficiency.