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Which of the following materials is required in a technique of decarburizing the molten steel?(a) Calcium carbonate(b) Sodium chloride(c) Carbon ferrochrome(d) Sodium ferrochrome |
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Answer» The correct choice is (c) Carbon ferrochrome The explanation: Decarburization technology uses high carbon ferrochrome to decarburize the molten steel at lower temperatures. If carbon oxidizes first with respect to chromium at low temperatures, then the reduction in pressure from atmosphere to a lower value will be required. Reduction in pressure is mostly done by vacuum oxygen decarburization (VOD) method. |
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