Distribution pattern of steel grinding cylinder and addition of chromium

- Sep 03, 2018 -

Steel grinding cylinders must have reasonable forging, heat treatment and casting processes in the production of steel balls. The whole product mainly adopts its vertical pouring and reasonable use of external cold iron, and strictly controls the pouring temperature, so that the steel balls can be The casting has a good solidification sequence and a feeding condition, thereby obtaining a dense internal structure and attenuating the coarse grain.

The heat treatment process of the steel grinding cylinder determines the realization of its mechanical properties and the distribution of carbides. Since the composition of the steel ball contains a certain amount of chromium and other alloying elements, how to make these alloying elements form hard point carbonization. The role of the material is fully exerted and is also a factor to consider when formulating the heat treatment process. In short, the establishment of a reasonable production process and strict quality inspection methods is a prerequisite for ensuring the performance of the steel ball.

Steel grinding cylinders are produced by forging process. At present, stainless steel balls are commonly used in 201, 302, 304, 316, 316L, 420, 440C. A steel that contains more than 12% chromium and is resistant to chemical attack. Stainless steel does not rust, but is not easy to rust. The principle is that by adding chromium, a layer of dense tissue of chromium oxide is formed on the surface of the steel, which can effectively block the re-contact of the steel and the air, so that the oxygen in the air cannot enter the steel, thereby preventing the steel from being produced. The effect of rust.

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