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

The invention discloses a method for preparing an environment-friendly water-soluble hardening agent and belongs to the field of preparation of hardening agents. The invention belongs to divisional application, and the original Chinese patent application number of is 201310350402.X. According to the preparation method, all components of the hardening agent are guaranteed to be completely dispersed and uniformly distributed by virtue of controlling the feeding sequence of the raw materials and temperature and stirring time, so that the hardening agent meets the hardening requirement, can be used for strictly controlling the cooling speed of large shafts to prevent hardening crack, greatly lowering the initial cooling speed and the cooling speed at a temperature of below 400DEG C and lowering the internal stress of workpieces, has fast enough cooling speed for 650-450DEG C, and guarantees the hardening effect while guaranteeing the product not to be cracked by hardening; after being hardened, large workpieces are not cracked by hardening.

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 quenchingthe 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 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.

Disclosed is an external gas heating device of a coal pyrolyzing furnace. The external gas heating device is positioned on the middle part of a coal pyrolyzing 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.

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 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 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 relates to an aluminum alloy material and a quenching processing method. The aluminum alloy material uses aluminum as a main component and further comprises nickel, germanium, tin, copper, silicon, manganese, zinc, chromium and iron. The quenching processing method comprises the following steps: (1) preparing a cooling agent; (2) heating the surface of the aluminum alloy material; (3) quenching the surface of the aluminum alloy material; (4) cooling the aluminum alloy material. The aluminum alloy material disclosed by the invention has high flexibility and low rebound resilience and can meet the use requirements of more places; the surface of the aluminum alloy material is quenched, so that the surface performance of the aluminum alloy material is improved and the aluminum alloy material has a longer service life; the quenching method aiming at the aluminum alloy material disclosed by the invention has the advantages of low quenching cost, high convenience for controlling and good quenching effect and is beneficial to wide popularization and application.

The invention discloses a special quenching agent for a large shaft and a preparation method of the quenching agent, belonging to the field of quenching agents. The quenching agent is prepared from the following components: sodium chloride, sodium hydroxide, sodium citrate, cis-butenedioic acid, mesotrione, lotus root starch, acrylic acid, p-cresol, metribuzin and water. Through adding reasonable components and strictly controlling the component proportion, when used for quenching a shaft which is made of 45# steel and has the diameter of 1.8-3.5m, the quenching agent has the following advantages that the workpiece cooling speed is high within the temperature range of 650-450 DEG C, and the cooling speed is low at the temperature of below 400 DEG C, so that a favorable quenching effect can be obtained, and a quenching crack condition can also be avoided. The preparation method of the quenching agent has the advantages that all components in the quenching agent are completely dispersed and uniformly distributed by controlling temperatures and adding sequences of raw materials, the quenching agent is similar to a colloid in shape, and the cooling speed at the temperature of below 400 DEG C is lowered.

The invention discloses a method for preparing an automobile leaf spring. The automobile leaf spring is manufactured by using a spring steel billet material containing molybdenum, vanadium and trace amounts of chromium and nickel elements. Spring steel plate, rolled lugs, constant temperature treatment, water cooling and quenching, air cooling, surface fine grinding, shot blasting treatment, gas co-infiltration, coating, and finished product after drying. This invention uses the waste heat repeatedly after the hot rolling process with the help of a constant temperature device Complete the forming and heat treatment of the leaf spring, reduce the heating time, and greatly reduce the energy loss. In the heat treatment process, water is used as the cooling medium, which reduces the environmental pollution problem. Cost reduction, improved surface quality of leaf springs, increased corrosion resistance and fatigue properties.