211results about How to "Improve quenching quality" patented technology

The present invention relates to a water-soluble quenching medium. It is formed from proper quantity of polyether high-molecular mixture, surfactant, inorganist salt, sterilizing agent, inorganic alkali and water, and when it is concentration is 4-6%, it can be used for integrally quenching carbon steel, and when its concentration is 8-12%, it can be used for high-frequency quenching carbon steel, and it has the advantages of low use concentration, long service life and stable quenching quality.

The invention discloses a time-controlled sudden cooling vacuum heat treatment process for H13 steel, which includes heating and heat preserving, quenching and tempering; the quenching media for quenching after heating and heat preserving is salt water containing 5 to 10 percent NaC1, and the quenching treatment lasts for 1 to 5 minutes. The invention adopts a special time-controlled sudden cooling process, which not only prevents the danger of cracking during quenching of the salt water, but also greatly improves the quenching quality, so as to effectively improve the impact toughness of the H13 steel after tempering, and thus greatly extends the service life of the mould.

A gas furnace external circulation cooling method and a cooling system of a double-chamber constant-pressure quenching furnace belongs to the metal quenching field; aiming at the defects of wasting nitrogen with the prior art, the invention provides a method by which the high-temperature nitrogen is discharged from the top of the quenching furnace to be introduced into a heat exchanger out of the furnace for cooling; and then the nitrogen is mixed with the liquid nitrogen from a liquid nitrogen storage tank to participate in the quenching process and the circulation of the gas out of the furnace; the system which implements the method is that the nitrogen outlet at the top of a cooling chamber is connected with the heat exchanger and the outlet of the heat exchanger is connected with the outlet pipe of the liquid nitrogen storage tank in parallel; the main pipe after the parallel connection is connected with the air intake of a convergent divergent channel which is arranged on the cooling chamber; the outlet of the convergent divergent channel is connected with a nozzle to form a gas circulation cooling system; the inlet of a heat exchanging pipe in the heat exchanger is connected with a water pump or a fan and the inlet of the water pump is connected with a water tank; the inlet of the fan is arranged in the atmosphere to form circulation cooling system; the liquid nitrogen storage tank is connected with the parallel main pipe to form a medium supply system. The invention is characterized by saving nitrogen and high-quality quenching.

The invention relates to a quench machine tool which comprises a base, a loading and unloading mechanism arranged on the base, a quench mechanism, a cooling mechanism and a control system, wherein the quench mechanism comprises a workpiece sliding platform, a sensor mobile sliding platform and a power switcher; the workpiece sliding platform comprises a machine frame, a ball screw installed on the machine frame, a workpiece top tip and a workpiece top base; the ball screw is driven by a driving device to drive the workpiece sliding platform to linearly move; the workpiece top base is driven to rotate by the driving device; the sensor mobile sliding platform is arranged to match the workpiece sliding platform, is driven by the driving device to shift and comprises a sensor installed on a transition row of the sensor mobile sliding platform and moving along with the sensor mobile sliding platform; and the power switcher is electrically connected with the sensor mobile sliding platform and controls the sensor mobile sliding platform to switch among loads with different frequencies. The quench machine tool not only has high production efficiency, but also has stable workpiece quality and good workpiece consistency, the whole quench process has reasonable actions and high efficiency, and the requirement of massive and continuous production can be satisfied.

The invention relates to an automatic quenching device, which comprises a quenching tank, a supporting frame, a quenching frame, a lifting mechanism, and a carrying roller, wherein the supporting frame is arranged above the quenching tank; the quenching frame is positioned inside the supporting frame; the lifting mechanism for making the quenching frame move up and down is arranged between the quenching frame and the supporting frame; and the carrying roller is horizontally arranged inside the quenching frame. The carrying roller is connected to a wheel hub which is quickly carried to a quenching position, and the lifting mechanism lowers the quenching frame to a position below the liquid level of the quenching tank. The automatic quenching device can quickly carry the wheel hub to the quenching position, can control the best quenching moment, and has high wheel hub quenching quality; besides, the automatic quenching device adopts the carrying roller to transfer the wheel hub and avoids local long-time high-temperature operation of a delivery mechanism, so the component damage is small and the later maintenance cost is low.

The invention relates to mechanical equipment in the field of metal heat treatment, in particular to an air blast quenching machine for rollers. The air blast quenching machine comprises an air spraying device, two heating devices, an air extracting device and a rotation device, wherein the air spraying device, the heating devices and the rotation device are all mounted and fixedly connected to a horizontal surface on a concrete poured foundation base; the air extracting device is mounted and fixedly connected into a groove in the foundation base; the heating devices are arranged on two sides of the rotation device symmetrically; and a workpiece roller is arranged on the rotation device. The air blast quenching machine adopts four-carrier roller synchronous constant-speed mobile rotation, so that the heating uniformity and the quenching quality are improved; due to combined function of the air spraying device and the air extracting device, the cooling speed can be accelerated, and the work environment can be improved; and as both the air spraying device and the heating devices are arranged on and connected with a link mechanism, mobile starting and stopping can be realized, and spray head distances can be adjusted fast.

The invention discloses a waste heat hardening and tempering process of motorcycle crank forged piece, comprising the working procedures like medium-frequency heating, extracting billet, blocking, precise forging, isothermal processing, quenching, tempering and the like. The process can obviously improve hardenability through forging waste heat hardening and tempering, ensure even distribution of tissues and hardness and ensure that the forged piece has the mechanical performance superior to that of the workpieces after conventional hardening and tempering. The workpieces undergoing finish forging adopt short isothermal processing to ensure the temperature of the workpieces to be uniform when entering quenching liquid, thus ensuring stable performance and excellent quality and realizing industrial production. Meanwhile, the short isothermal processing only consumes little electric energy, thus conforming to the requirement of the economical society.

This invention relates to an art for oil-quenching high-chromium alloy cast ball. The high-chromium alloy cast ball and cast-section are heated to quenching temp., then tapped out of the furnace, proceeding oil-quenching, oil temp. being controlled <120 deg.C, when temp. of the product being lowered below 300 deg.C, the cast ball and cast section are taking out of the oil-cell. The wear-resisting high-chromium cast ball and cast section treated by using this method are better than that of prior art treatment in various kinds of technical index, wherein: quenching hardness=60-65 deg.C, difference (between center and surface) of hardness <2.0 RHc, ball falling test >3000 times. This quenching art overcomes prior art defect. The product treated by this method has excellent wear-resisting property and longer service-life.

A positioning device for a straight round pipe fitting comprises a positioning device main body provided with a first positioning mechanism, a second positioning mechanism and a third positioning mechanism, wherein respective positioning parts of the first positioning mechanism, the second positioning mechanism and the third positioning mechanism are distributed in the circumferential direction of the same arrangement circumference and can be in contact with the inner peripheral surface or the outer peripheral surface of a straight round pipe fitting (7) in the radial direction of the arrangement circumference; and all the positioning parts can slide and/or roll when the straight round pipe fitting and the positioning device for the straight round pipe fitting move relative to each other. Besides, the invention also provides induction hardening equipment for the straight round pipe fitting, which is equipped with the positioning device for the straight round pipe fitting. The positioning device for the straight round pipe fitting, provided by the invention, can optimally enable the circumferential gap between the wall of the straight round pipe fitting and a hardening inductor to be uniformly the same as much as possible, so that the induced magnetic field intensity in the pipe wall can be uniformly distributed in the circumferential direction, a relatively uniform hardening layer can be effectively formed and the hardening quality is remarkably improved.

The invention provides a polygonal drum skew rolling ball-milling steel ball quenching unit which is used for conducting quenching heat treatment on skew rolling ball-milling steel balls with the diameter phi of 20-80 mm to quickly cool the skew rolling ball-milling steel balls from 800 DEG C-900 DEG C to 100 DEG C-300 DEG C. A quenching drum of the quenching unit is a polygonal drum composed of aplurality of drum flat plates. The inner sides of the drum flat plates are provided with drum partition boards and steel ball lifting plates. The drum partition boards are arranged obliquely. Spiralgrooves are formed between the drum partition boards. The steel balls go into the quenching unit through a ball inlet channel are lifted up by polygonal interior angles through subchannels of the polygonal drum in order and then are subjected to rolling quenching in the spiral grooves. The steel balls at the tail ends of the spiral grooves are lifted up to a certain height by the steel ball lifting plates and then freely fall to a ball outlet channel to be discharged. The drum flat plates are provided with kidney-shaped through holes, the kidney-shaped through holes are used for allowing a quenching medium inside and outside the drum to flow to achieve internal and external heat exchange of the drum and finally complete quenching. The polygonal drum skew rolling ball-milling steel ball quenching unit achieves safe, economical and high-quality quenching of the skew rolling ball-milling steel balls.

The invention discloses an automatic quenching machine tool comprising a machine tool main body, wherein the machine tool main body is provided with a servo system. The automatic quenching machine tool is characterized in that a feeding device is arranged at the left side of the machine tool main body; a discharging device is arranged at the right side of the machine tool main body; a turnover seat controlled by the servo system is arranged in the middle of the machine tool main body; a beam is arranged right above the machine tool main body; the turnover seat is provided with a rotating arm by which turnover manipulators are educed; the beam is provided with a left sliding seat and a right sliding seat which are controlled by the servo system; the lower end of the left sliding seat is provided with a left manipulator adapted to the feeding device; the lower end of the right sliding seat is provided with a right manipulator adapted to the discharging device; and the machine tool main body is provided with a quenching system adapted to the left manipulator and the right manipulator. The automatic quenching machine tool has the very remarkable beneficial effects of high work efficiency, automatic double-station quenching of workpieces, good quenching effect and quality and wide application range.

The invention discloses a heat treatment device for a round-link chain and an application method thereof. The device comprises a quenching part and a tempering part which are sequentially arranged, wherein first cooling parts are arranged at the quenching part and the tempering part; the quenching part is provided with a quenching temperature regulating box; the tempering part is sequentially provided with an uniform-temperature tempering heating box, at least one tempering temperature regulating box and a differential-temperature tempering heating box; the quenching temperature regulating box is provided with a second cooling part. The device has the characteristics of being high in integration degree and high in working efficiency; after the round-link chain is quenched, an uniform and small low-carbon lath martensite structure can be obtained; the quenching quality is high; the second cooling part and the first cooling parts are correspondingly connected to a cooling source, so that the cooling quality can be improved, and the requirements of each part of the round-link chain on hardness and toughness can be met.

An automatic quenching oil tank comprises a feeding device, a discharging device, a quenching conveying chain and an antiskid machine. The antiskid machine comprises an antiskid rack, a vertical sliding seat and a cylinder fixed on the antiskid rack, chain rails are arranged on the left side and the right side of the upper end of an oil tank frame, the left end and the right end of the antiskid rack are matched with the left side and the right side of the oil tank frame through a sliding rail structure, a rotating shaft extending in left-right direction is arranged on the antiskid rack, chain wheels corresponding to the chain rails arranged on the oil tank frame are arranged on the rotating shaft, the rotating shaft is connected with a driving motor, a push rod of the cylinder is arranged in front-rear direction, the end of cylinder is connected with the vertical sliding seat, a vertical screw is arranged at the upper end of the vertical sliding seat, and a press plate is arranged at the lower end of the vertical screw and assembled at the lower end of the vertical sliding seat through a line rail which is arranged in a vertically-extending manner. By the automatic quenching oil tank, large deformation of a plate spring in the process of quenching can be prevented, quenching quality is improved, realization of automated quenching is facilitated, quenching efficiency is improved, and quenching labor intensity is reduced.

The invention belongs to the technical field of die steel and particularly relates to a thermal treatment method for thick die steel. The thermal treatment method for thick die steel comprises the steps that steel ingots are subjected to quenching heating, the tapping temperature is 800-900 DEG C, and the hoisting time is 2-4 min; air cooling is conducted during hoisting; and the quenching process is conducted after completion of hoisting. According to the thermal treatment method for thick die steel, the problem of hardenability of die steel of 700-900 mm is mainly involved. The quenching quality is improved by making the reasonable field quenching thermal treatment process.

The invention provides a high-frequency induction heating and spray quenching device. The high-frequency induction heating and spray quenching device comprises a workbench, a loading and unloading mechanism for loading and unloading workpieces from a feeding hopper, an inductor assembly for heating and quenching, a heat monitoring assembly for monitoring heating capacity, a servo sliding table for entering and retreating from the inductor assembly and a falling material distribution mechanism. The workbench comprises a platen. The loading and unloading mechanism, the inductor assembly and the servo sliding table are sequentially arranged on the platen. The heat monitoring assembly is arranged in the inductor assembly and corresponds to the workpieces. The falling material distribution mechanism is arranged on the discharge side of a heating and quenching mechanism. The invention further provides a high-frequency induction heating and spray quenching method adopting the high-frequency induction heating and spray quenching device. The manners of single-end magnetic suction rotary heating and quenching, servo positioning, heating capacity monitoring, falling material distribution mechanism and the like are adopted; the device and the method have the beneficial effects of being short in loading and unloading period, high in positioning accuracy and capable of achieving automatic distribution; and therefore quality and efficiency are improved, and the production cost is reduced.

The invention discloses a drum device for online continuous quenching of inclined rolled steel balls. The drum device comprises a water tank, a variable frequency control motor, a speed reducer, a chain wheel mechanism, a ball inlet chute, a conical ball inlet drum, a columnar quenching drum, a conical ball outlet drum, a ball outlet chute, a chute bracket, a bearing base, a rotating shaft and a four-jaw spoke; the conical ball inlet drum is used for smoothly leading large-diameter steel balls, introduced by the ball inlet chute, into the columnar quenching drum; the columnar quenching drum is used for realizing spiral feeding and quenching functions of the steel balls; and the conical ball outlet drum is driven by the rotating shaft to rotate to realize the purposes of fishing the quenched steel balls and pouring the steel balls in the ball outlet chute. The drum device has the following beneficial effects: for the steel balls, with diameters of 50-65 mm, molded through high-temperature inclined rolling, the online continuous quenching is performed, so that the energy is saved, the quenching time is precisely controlled, and the quality of the steel balls is improved; and the drum device is high in quenching efficiency, stable in process, low in noise and high in automation degree, and can satisfy the large-batch continuous quenching requirement of the steel balls.

The invention relates to an ohmic heating method and an ohmic heating device. Through the ohmic heating method and the ohmic heating device, the quenching or annealing of the back surface and tooth surface of a workpiece can be carried out in a roughly continuous operation period, and the high-precise quenching or annealing quality is easily obtained on the back surface or tooth surface while striving to improve the efficiencies of quenching or annealing. The ohmic heating method is characterized by comprising the following steps that a switching device is switched to a back surface side, so that one pair of first touch points contact the two ends of the heating range in the length direction of the back surface of the workpiece supported by a support device, the regulated frequency and output current for the back surface are supplied to the touch points from a power supply device, and then ohmic heating is carried out on the back surface; and after the step, the switching device is switched to a tooth surface side, so that one pair of second touch points contact the two ends of the heating range in the length direction of the tooth surface of the workpiece, the regulated frequency and output current for the tooth surface are supplied to the touch points from the power supply device, and then the ohmic heating is carried out on the tooth surface.