The ball mill steel balls on the market can be divided into two types according to the manufacturing process: casting and forging, but their wear resistance is different. Due to the crushed materials, the steel balls need good wear resistance and sufficient toughness. Usually, alloy steel, high manganese steel, cast iron and ferrochrome are used for forging or casting at one time, and it is more economical to match the corresponding heat treatment process. ,
Process of forging steel ball:
Good surface quality, good impact resistance, strong toughness, good wear resistance, not easy to break and lose round. That is, the metal is heated to a temperature of 700-1300°C, and the forging machine is used to apply pressure to the metal blank to cause plastic deformation to obtain a processing method for forgings with certain mechanical properties, certain shapes and sizes. One of the two major components of forging (forging and stamping). Forging can eliminate defects such as as-cast looseness during metal smelting and optimize the microstructure. At the same time, due to the preservation of complete metal flow lines, the mechanical properties of forgings are generally better than those of castings of the same material. For the important parts of related machinery with high load and severe working conditions, forgings are mostly used except for simpler shapes that can be rolled, profiles or welded parts. In addition, for forging steel balls to be wear-resistant, the most wear-resistant materials must be selected, such as national standard 60Mn, 65Mn, or high-efficiency wear-resistant alloy steel materials independently developed by some companies, and it is recommended to use steel produced by national super large steel plants. The quality of these materials produced in different steel plants is also different, and the quality of forgings depends on the quality of the material. For example, the use of high manganese steel has good impact resistance, strong toughness and good wear resistance. , Not easy to break. Forged steel balls are favored by users because of their low price, economy and durability. For example, international mining giants Rio Tinto, BHP Billiton, and Anglo Gold all use forged steel balls.
Features of forging production:
(1) Forging the heated metal material into various shapes of tools, precision parts or blanks is called forging. Forging can change the internal structure of metal materials, refine crystals, and improve their mechanical properties.
(2) Forging production must use heating equipment, forging equipment and many auxiliary tools.
(3) Forging equipment mainly includes steam hammer, air hammer, die forging hammer, mechanical hammer, splint hammer, spring hammer, belt hammer, crank press, friction press, press, reaming machine, roll forging machine, etc.