Characteristics Of Chromium Content in Grinding Media Balls

Casting steel balls is an item that steel ball manufacturers attach great importance to. However, in the process of casting steel balls, we need to pay attention to not only these aspects, but also the details of the production of steel balls.

Among the new energy-saving steel ball manufacturers, there is a process for producing steel balls called casting steel balls. The steel ball manufacturers use electric furnaces to heat and melt waste materials such as scrap steel and iron, so that the charge is fully melted. In the process of melting the charge After adding an appropriate amount of precious metal alloy to the furnace for chemical composition tempering, so that the temperature of the molten iron in the furnace reaches 1500°C or more and the process requirements are met, the molten molten iron is poured into the steel ball mold or the steel ball production line mold.

In the steel ball industry, if the cast grinding ball contains chromium ≥10.0%, and the carbon content is between 1.80%-3.20%, it is called high chromium alloy cast steel ball. According to the national steel ball standard, the hardness of the high chromium ball must be ≥ Above 58, the impact value ak≥3.0J/㎝2. If this hardness is reached, the high chromium balls must be quenched and tempered at high temperature. If the hardness of the high chromium balls is lower than 54 by the chromium hardness tester, it means the batch of high chromium The ball has not undergone quenching heat treatment at all or the hardness has not been quenched. Such a product is not considered a qualified product in terms of quality.

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