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The influence of steel ball material selection on the manufacturing process

May 09, 2019

The manufacturing process of steel balls is a key factor in determining their service life. If there are defects in the surface or internal manufacture of the steel ball, such as shrinkage cavities, cracks, and through crystals, it will not only reduce the performance of the steel ball, but even cause the steel ball to break.
Reasonable forging, casting and heat treatment processes must be established in the production of steel balls. For example, for high-chromium cast iron balls, vertical pouring and reasonable use of external cold iron should be adopted, and the casting temperature should be strictly controlled. This can make the steel balls have good solidification sequence and feeding conditions in casting, and then obtain dense internal structure. And weaken the phenomenon of coarse grains. The heat treatment process of the steel ball determines the realization of its mechanical properties and the distribution of carbides. Since a certain amount of chromium and other alloying elements are contained in the composition of the steel ball, how to make these alloying elements form a hard spot carbide is fully exerted, which is also a factor to be considered in the heat treatment process.
Commonly used materials for wear-resistant steel balls are: low carbon alloy, high manganese steel, high chromium cast iron, high carbon high manganese alloy steel. The low carbon alloy steel ball has better toughness and reasonable price, and its service life is more than doubled than that of the low chromium casting ball.
High-manganese steel has good toughness, and it can be quickly produced in the surface layer of Ai, which has a work hardening index 5-7 times higher than other materials, which can effectively improve the wear resistance, provided that it is in a large impact or contact stress. Under the influence of the role can be achieved.
High chromium cast iron is a wear resistant material with excellent wear resistance.
The high carbon high manganese alloy steel is mainly an alloy structural steel containing various elements such as chromium and molybdenum, and has high hardness and good toughness.

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