6.1 The diameter of the casting grinding ball is measured by a tool with an accuracy of not less than 0.01 mm. 6.2 The analysis method of the chemical composition should be according with the standards of GB/T 223. 3, GB/T 223. 4, GB/T 223.11, GB/T 223. 18, GB/T 223. 23, GB/T 223. 26, GB/T […]
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5.1 The grinding balls tolerance of the diameter should be accord with Table 1. 5.2 The main chemical composition of each grades should be accord with Table 2.
4.1 Chrome alloy cast iron grinding balls are divided into 7 grades according to the chrome content. Nodular cast iron grinding balls are divided into two grades according to the matrix structure, I. E. Bainite ductile cast iron grinding balls and Martensite ductile cast iron grinding balls.
GB/T 5611 established and the following terms and attributes shall apply to this standard 3.1 Chrome alloyed cast iron grinding ball The white cast iron with chromium as main alloy element is called chrome alloy cast iron for short, and the cast grinding ball with chrome alloy cast iron as material is called chrome alloy cast iron […]
This standard specifies the product classification, technical requirements, test methods, inspection rules, packaging, marking and transportation of chromium alloy cast iron grinding balls and nodular cast iron grinding balls.
This standard is modified with the USA ASTM A532/A532M-93a (2003) ‘Standard specification for wear-resistant cast iron’ and EU standard EN12513:2000N ‘CAST WEAR-RESISTANT CAST IRON’ and other foreign advanced standards of the relevant provisions.
In the heat treatment process, quenching and tempering is very important for casting grinding mill balls. It influences the balls hardness, inner structure, impack value. These are used to indicate a balls quality. Here briefly introduce you the what is the quenching and tempering.
To achieve the hardness of cast chrome grinding balls, which contains more than 10.0% chrome and 1.80%-3.20% carbon, the hardness (HRC) of the cast grinding ball must be more than 58 degrees and the impact value is AK 3.0 j / cm2. High Chrome Ball must be treated by high-temperature quenching and tempering. Casting chrome […]
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