Nodular cast iron grinding ball and preparation method thereof
A nodular cast iron and grinding ball technology, applied in the field of nodular cast iron, can solve the problems of low toughness and high hardness
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Embodiment 1
[0036] A nodular cast iron grinding ball, the final chemical composition of the grinding ball includes: C: 3.65%, Si: 2.65%, Mn: 1.72%, Sn: 0.085%, Mg: 0.04%, Re: 0.026%, S : 0.03%, P: 0.04%, and the rest is Fe.
[0037] In order to obtain the above-mentioned nodular cast iron grinding balls, the manufacturing process is as follows:
[0038] (1) Smelting molten iron: Add pig iron, scrap steel, nodular iron return charge, recarburizer, ferromanganese and ferrotin into an intermediate frequency induction furnace for smelting, heat up to 1550°C, smelt to clear, and stand for 10 minutes to obtain molten iron;
[0039] (2) Spheroidization and inoculation: control the temperature of the molten iron at 1520°C, pour the molten iron into the spheroidization ladle, add silicon carbide nanomaterials with a total mass of 0.2% of the molten iron in the spheroidization ladle, and then add a covering agent to isolate the air. The cored wire is used for spheroidization and inoculation treatm...
Embodiment 2-4
[0044] A nodular cast iron grinding ball, its embodiment 2-4 is basically the same as embodiment 1, the difference is that the final chemical composition of the grinding ball is different, as shown in Table 1 below.
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