31results about How to "Reduce quenching costs" patented technology

The present invention relates to heat treatment of metal material. The periodical stepped quenching cooling equipment of the present invention includes tank, U-shaped fluid guiding tube, propeller stirrer set beside the tank and with propeller extending below the liquid surface, elevating platform and this driving system, cover plate, one nozzle below the cover plate and one other nozzle over the liquid surface. The propeller is inserted into one opening of the fluid guiding tube and the other opening of the fluid guiding tube is set below the soaked quenched part. The present invention makes it possible to regulate the cooling strength of the quenching based on the requirement, has low quenching cost, no pollution of nitrate and oil to atmosphere and high production safety.

The invention provides a method for using a standard sample plate to quench a leaf spring and aims at significantly reducing the quantity of the sample plates of the leaf spring and cost for quenching the leaf springs with constant sections and improving the production efficiency. The method of the invention is characterized in that the length and the height of arc of the leaf springs with constant sections are aggregated, calculated and analyzed and the leaf springs with constant sections are classified according a certain length and then a plurality of standard sample plates are made according to a certain curvature interval of each category; when in quenching, the leaf springs with constant sections and the curvature in the interval, the standard sample plate with the most similar radius of the curvature is served as a quenching sample plate to quenching the leaf spring. As a result, the standard sample plates accounting for 1/40 to 1/20 of the current more than 8000 kinds of leaf springs with constant sections can successfully realize the quenching so as to simplify the making, management and maintenance of the sample plates and shorten the production period at the same time.

The invention discloses a carrier roller processing technique conducive to reducing heat treatment defects. The carrier roller processing technique comprises a quenching step and a tempering step, wherein the quenching step comprises the procedures of preheating, heat preservation and shock cooling; in the preheating procedure, a carrier roller is heated to 630-650 DEG C, and heat preservation lasts for no fewer than 5 h; in the heat preservation procedure, the hot carrier roller obtained in the preheating procedure is transferred into a heating furnace at the temperature above 870 DEG C to be heated to 840-870 DEG C, and heat preservation lasts for no fewer than 2 h; the shock cooling is water-cooling and air-cooling alternated circulating cooling, and tempering is performed once after each circulating cooling procedure. According to the technique, water cooling and air cooling are performed alternately to replace conventional oil-quenching shock cooling under the condition of achieving heat treatment quality objectives; such a change in the technique not only reduces the quenching cost, but also reduces the dependence on oil quenching agents. Besides, the implementation of the technique is favorable for environment protection and the route of the technique is favorable for uniformity of heat treatment hardness on the surface and the depth of the carrier roller.

The invention discloses a carrier roller heat treatment technology. The carrier roller heat treatment technology comprises a quenching treatment step and a tempering step. According to the quenching treatment step, preheating, heat preservation and shock cooling working procedures are sequentially carried out on a forming carrier roller with billet materials of 40 Cr, and the water cooling and air cooling interphase circulating cooling mode is adopted by shock cooling; according to the preheating step, the carrier roller is heated to 630 DEG C to 650 DEG C, and heat preservation is carried out on the carrier roller for five or more hours; according to the heat preservation step, the heat carrier roller obtained in the preheating step is moved into a heating furnace with the temperature higher than 870 DEG C to be heated to 840 DEG C to 870 DEG C, and heat preservation is carried out on the heat carrier roller for two or more hours. The process route is simple, the shock cooling mode that water cooling and air cooling are alternatively carried out is adopted, and under the condition that the heat treatment quality target is achieved, an existing adopted oil quenching shock cooling mode is replaced. Due to changes of the process, the quenching cost is saved, meanwhile, the dependency on oil quenching agents is reduced, and due to implementation of the process, environmental protection is benefited.

The invention discloses a preparation method of an grinding wheel with a discretely reinforced hub electroplated with super hard abrasive. The preparation method comprises the steps that a nozzle of aquenching gun is moved in a wavy shape in the axial direction of a grinding wheel hub, and the temperature of materials, irradiated by plasma arc, of the external circumference surface of the grinding wheel hub is increased quickly, and decreased to form a wavy quenched zone; the quenching gun is returned to the original position, and the grinding wheel hub is rotated for an arc length around itsown axis for machining a second wavy quenched zone; the materials which are not irradiated by the plasma arc between the two quenched zones still maintain the original matrix structures; so repeatedly, till the whole external circumference surface of the grinding wheel hub forms the structure that the quenched zones and the matrix structures are arranged alternately in a wavy shape; and the grinding wheel hub discretely reinforced is electroplated with super hard abrasive to form the grinding wheel with the discretely reinforced hub electroplated with the super hard abrasive. The preparationmethod disclosed by the invention facilitates improvement of the bonding strength of the grinding wheel hub and a nickel coating, and the convergence of interface cracks is reduced; and the bearing capacity of the nickel coating is improved, and the service life of the electroplated grinding wheel is prolonged.

The invention relates to a gear machining auxiliary tool, in particular to a bracket for gear quenching. The bracket for gear quenching aims at solving the technical problem that the gear production cost is high since a gear is prone to damage during quenching treatment in the prior art. The bracket for the gear quenching is characterized in that locating blocks are uniformly arranged on a base; the locating blocks are connected with the base in a sliding manner; in addition; and the locating blocks comprise abutting and connecting parts and locating parts. An included angle between each gearand a horizontal plane is 30-60 degrees due to the abutting and connecting parts, so that the gears are obliquely located on the base, a space occupied by each gear on the base is reduced, more gearscan be placed on the base, and the quenching cost of the gears is lowered. The gears are located through the locating blocks, and the contact area between each gear and the base is reduced, so that the gears are heated uniformly, the gears are not prone to cracking after being quenched, and the machining cost of the gears is lowered.

The invention discloses an automobile gear assembly uniform quenching device which comprises a quenching box. One side of the top surface of the quenching box is provided with a feeding port, and thebottom of a feed channel is provided with a groove. A first fixed frame and a second fixed frame are respectively fixed at the bottom of the feed channel and on the inner wall of the quenching box. Asecond connecting rod is internally provided with a cavity, a spring is fixed inside the cavity, and the surface of a guide plate is provided with through holes. The lower end of the guide plate is located on the outer wall of the quenching box and provided with a discharging port. An outlet pipe is installed in the middle at the bottom of the quenching box. One side of a filter net located in anexhaust pipe is in insertion connection with an activated carbon adsorption cylinder, a water pump is installed on the outer wall of the back surface of the quenching box, and a rotary nozzle is installed at the bottom of a branch water pipe. The device facilitates recycling of a coolant to save resources, and the quenching of a gear assembly is more uniform and convenient. At the same time, gas generated by quenching is treated and discharged to protect the environment.

The invention discloses a heat treatment method of a non-ferrous metal hot roll, and relates to the technical field of metal processing. The method comprises the following steps: 1) preheating: the roll is placed in a high-temperature furnace for preheating treatment after being demolded and cleaned; 2) secondary normalization; 3) quenching: double-frequency induction quenching is performed on the working surface of the roll, and the cooling mode is a combination of oil cooling and air cooling; 4) tempering; 5) annealing. The heat treatment method of the non-ferrous metal hot roll is simple and feasible; the treated non-ferrous metal hot roll is high in strength and good in thermal cracking resistance and electrochemical corrosion resistance, and has excellent accident resistance, fatigue resistance and abrasion resistance, thereby meeting operating requirements of practical production and application; the service life of the non-ferrous metal hot roll is effectively prolonged, and production efficiency and economic benefits are increased.

The invention discloses a quenching process and device for low-impurity ultra-low-carbon stainless steel. The method includes the steps that: firstly, a blank is put into a heating furnace and heatedto 1060-1200 DEG C; secondly, a sliding seat at the bottom of the heating furnace is pulled out, when the sliding seat is pulled out, the two sides of the bottom of the blank slide to the two sides ofa hanging basket, and thus the hanging basket can lift the blank; thirdly, the hanging basket is lifted through a crane, and in the process of lifting the hanging basket, the blank can be lifted by the hanging basket and thus be separated from the sliding seat of the heating furnace; fourthly, the blank is moved to the position above a quenching bath through the hanging basket, and then lowered,so that the high-temperature blank is put into quenching oil in the quenching bath, and the blank is completely submerged in the quenching oil for quenching; fifthly, the initial temperature of the quenching oil is 80-130 DEG C; and sixthly, quenching is conducted for 1 to 3 minutes and then completed. Through the quenching process and device, the product performance is improved, and potential safety hazards are reduced.

An external gas heating device of a coal pyrolyzing furnace is positioned on the middle part of a furnace body and around the outer wall of a carbonizing chamber and comprises more than one group of first gas heater and second gas heater that have the same structure and a gas reversing device. The gas reversing device supplies air and purified gas into a combustion chamber of the first gas heater to be combusted and meanwhile sucks hot waste gas from a combustion chamber of the second gas heater. In the same way, the gas reversing device supplies air and purified gas into the combustion chamber of the second gas heater to be combusted and meanwhile sucks hot waste gas from the combustion chamber of the first gas heater. In the present invention, the aims of energy conservation and consumption reduction are fulfilled, and the coking cost is saved.

The invention discloses a quenching treatment method of a seamless stainless steel pipe for a fluid, and belongs to the technical field of steel pipe quenching. The method comprises the following steps of immersing the bottom of the steel pipe heated until the temperature is above the austenite temperature into a quenching medium, rotating the steel pipe at the same time, and spraying the outer portion of the steel pipe until the temperature of the steel pipe falls below the martensite transformation temperature. Compared with an existing quenching treatment method adopting outer sprinkling and inner spraying or outer immersion and inner spraying, the method of bottom immersion and rotating outer spraying is adopted, the quenching cooling speed is high, cooling is uniform, the cost is low,quenching cracking phenomena can be effectively reduced, the surface quality of the stainless steel pipe is improved, and the cracking rejection rate of the seamless stainless steel pipe is reduced.