https://www.bearingroller.com/rolling-elements/steel-ball/
Ball mill balls on the market today can be divided into two types according to the manufacturing process: casting and forging, but their degree of wear is different. Due to the broken material, the steel ball needs good wear resistance and needs sufficient toughness. It is usually formed by forging or casting with alloy steel, high manganese steel, cast iron and ferrochrome. It is economical to match the corresponding heat treatment process.
According to the process and material, the ball mill ball can be divided into:
1Forged steel ball: low carbon alloy steel ball, medium carbon alloy steel ball, high manganese steel ball, rare earth chromium molybdenum alloy steel ball;
2 Cast steel ball: low chromium Cast ball, medium chromium cast ball, high chromium cast ball. Which steel ball is the best on the market today?
Let us analyze it now: 1. Forged steel ball: good surface quality, good impact resistance, strong toughness, good wear resistance, not easy to break and round. That is, the metal is heated to a temperature of 1050 ° C (plus or minus 50 degrees), and a forging press is used to apply pressure to the metal blank to cause plastic deformation to obtain a forging having a certain mechanical property, a certain shape and a size. One of the two major components of forging (forging and stamping). Through forging can eliminate defects such as as-cast looseness caused by metal in the smelting process, optimize the microstructure, and at the same time, the mechanical properties of the forgings are generally better than those of the same materials due to the preservation of the complete metal flow lines. For important parts of the relevant machinery with high load and severe working conditions, forgings are often used except for the available rolled sheets, profiles or welded parts. In addition, forged steel balls must be wear-resistant materials, such as the national standard 60Mn, 65Mn, or some of the company's self-developed high-efficiency wear-resistant alloy steel materials, we use the steel produced by the national extra large steel mills, also a kind The quality of materials produced in different steel mills is also different, and the quality of forgings is 80% depending on the quality of the materials, such as high manganese steel, good impact resistance, 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 AngloGold Gold use forged steel balls.Characteristics of forging production:
(1) Forging the heated metal material into various shapes of tools, mechanical parts or blanks, which is called forging. Forging can change the internal structure of the metal material, refine the crystal and improve its 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, plywood hammer, spring hammer, belt hammer, crank press, friction press, machine, reaming machine, roll forging machine, etc.