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What are the applications of inoculants in casting?

Time:2022-08-31 Click:180

The inoculant is suitable for gray cast iron and ductile iron, and can promote the formation of "A" type graphite to complete the formation of graphite nodules.

It can be nucleated in a wide temperature range, has strong spheroidization ability and anti-recession ability, and can effectively prevent the tendency of casting white mouth.

The deoxidation effect is more thorough, which is better than other deoxidation alloying agents. The addition amount is 35-50% of 75# ferrosilicon.

When the silicon-barium alloy containing 10%-35% barium is used as a deoxidizer in steelmaking, it has high utilization rate and strong desulfurization ability, which is better than silicon-calcium alloy. After the addition of silicon-barium alloy, it can make important changes in the nature and distribution characteristics of non-metallic inclusions in steel.
Adding an appropriate amount of silicon-barium alloy into the steel can improve the plasticity and toughness at high and low temperature, and the silicon-barium iron can improve the cold resistance of the steel.

At present, in casting production, most manufacturers understand the method of using inoculants to improve the quality of castings. Carelessness can cause big production problems.
Grey cast iron without inoculation treatment has unstable microstructure, low mechanical properties, and white cracks easily appear on the thin wall of the casting. Inoculation treatment is essential to ensure the consistency of casting quality.
The inoculant used in cast iron inoculation treatment is very small, and has little effect on the chemical composition of cast iron, but has a great effect on its microstructure. The mechanical properties of gray cast iron depend to a large extent on its Therefore, it can improve the mechanical properties of gray cast iron and have a significant impact on its physical properties.


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