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Gear forging process introduced
    Also known as cast steel castings gear gear. This is because most of the gears are made of cast steel. Here, I share some of the production gear castings and heat treatment related information.
    Gear casting weight usually ranging from a few kilograms to several tons. Gear casting materials commonly used high-carbon steel, some containing chromium, nickel, molybdenum alloy steel, in order to achieve high tensile strength. Generally lower than the physical needs of the large gear pinion.
    About casting process, generally on the application of floor molding process and to meet the normal requirements. As for steel gear, such as the driven gear, and the idler gear, the use of quartz sand floor molding process is a good choice. Why, because most of the parts of the gear are to be machined. So, you do not need to use a higher casting process. In addition, with respect to the large steel castings, using quartz sand floor molding process it is almost the only choice.
    Heat-treatment, of course, all steel castings must be standardized in order to eliminate the internal pressure. Some parts of the gear may be welded castings. If the foundry casting welding, weld must annealing position. If hobbing high hardness, you can again annealed to reduce the hardness and eliminates internal hard spot. After processing and hobbing, gear quenching or so-called hardening treatment to improve the surface hardness of the gear teeth. For small gears, you can do carburizing. For large driven gear, you can do surface hardening treatment. No hardened gears life is very short, only a few weeks to several months. Due to the higher gear castings for defects in material, processing and heat treatment requirements. Moreover, orders gear casting relatively small. Therefore, many steel foundries do not want to manufacture.
    Some gear manufactured by the forging process. Internal gear forging better tissue density, higher strength. Forged gear can be used for more stringent working conditions. Casting strong low gear, but widely used in the general working conditions. High gear forging costs and relatively low cost casting gear. Buyer should select the appropriate manufacturing process based on the cost and conditions of use.
For more advice: double gears, mining machinery gear