High Level Metal High Carbon Silicon

A method for determining the aluminum content in a high carbon silicon aluminum alloy sample involves: decomposing the high carbon silicon aluminum alloy sample using hydrochloric acid, nitric acid, and hydrofluoric acid, adding boric acid and perchloric acid until smoke appears, and handling the residues of any insoluble samples; the EDTA titration method is used to measure the aluminum content in the high carbon silicon aluminum alloy. This method has good precision and accuracy, providing accurate data for the steel-making composition control process.

1.A method for producing high-carbon silicon equivalent high-grade gray cast iron can be carried out using an electric furnace. The manufacturing process steps are as follows: melt the molten iron in the electric furnace, controlling the carbon content of the molten iron to be 3.1-3.3%, silicon content to be 1.8-2.0%, manganese content to be 0.6-1.0%, phosphorus content ≤ 0.1%, sulfur content ≤ 0.1%, and the total content of other trace elements ≤ 0.2%. Tin, copper, and chromium are added separately, with the contents in the molten iron being: tin 0.05-0.08%, copper 0.2-0.5%, and chromium 0.2-0.5%. The beneficial effect of this invention is that the materials prepared by this method have excellent casting performance, allowing for castings with wall thicknesses of 3-5mm to be produced without white iron, and the cast iron grades can reach HT250 and HT300.

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