Steel - Casting, Alloy, Heat Treatment

Steel - Casting, Alloy, Heat Treatment: The simplest way to solidify liquid steel is to pour it into heavy, thick-walled iron ingot molds, which stand on stout iron plates called stools. During and after pouring, the walls and bottom of the mold extract heat from the melt, and a solid shell forms, growing approximately with the square root of time multiplied by a constant. The value of the constant depends on the heat flux between the already solidified shell and the cooling media surrounding it and is actually equivalent to the solidified shell’s thickness after one minute—namely, about 20 millimetres when solidifying steel. Accordingly, the ingot
Steel, alloy of iron and carbon in which the carbon content ranges up to 2 percent (with a higher carbon content, the material is defined as cast iron). By far the most widely used material for building the world’s infrastructure and industries, it is used to fabricate everything from sewing needles to oil tankers.

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