Silicon Calcium Alloy Can Replace Aluminum

Calcium silicon, not called calcium silicide, contains calcium 22 ~ 35%, silicon 60 ~ 65%. YB 525-65 stipulates that the calcium content is not less than 31%, 28% and 24%, respectively. Mainly used as inoculant for cast iron. Silicon-calcium alloy has a strong reduction capacity and is also used as a deoxidizer for high-quality steel. Because calcium is very active at steelmaking temperature, the effect is not stable, it is appropriate to add some kind of mitigation agent.
As a deoxidizer of steel, silicon - calcium - barium alloy or silicon - calcium - barium - aluminum alloy, or silicon - calcium - manganese alloy is mostly used.

Calcium and silicon have a strong affinity with oxygen, especially calcium, not only has a strong affinity with oxygen, but also has a strong affinity with sulfur and nitrogen, so calcium silicon alloy is an ideal compound rubber oxygen agent, desulfurizer. Silicon alloy not only has strong deoxidation ability, deoxidation products are easy to float, easy to discharge, but also can improve the performance of steel, improve the plasticity of steel, impact toughness and fluidity. At present, silicon calcium alloy can replace aluminum for final deoxidation. It is used in the production of L-quality steel, special steel and special alloys, such as rail steel, low carbon steel, stainless steel and special alloys such as nickel base alloy and titanium base alloy, which can be used as silicon calcium alloy as deoxidizer. Calcium-silicon alloy is also suitable for use as a warming agent for converter steel workshop, calcium-silicon alloy can also be used as inoculant of cast iron and additive in ductile iron production.

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