Method for manufacturing aluminum profiles used for coal cars

The invention discloses a method for manufacturing aluminum profiles used for coal cars, comprising the following steps of: a, casting bar compounding, b, casting bar smelting, c, casting bar casting, d, homogenization treatment, e, casting bar surface treatment, f, casting bar heating, g, mould heating, h, extrusion production, i, on-line quenching, j, profiles aging, etc., each parameter in each step is strictly controlled; through an experimental test, the performances of the aluminum profiles obtained by the method provided in the invention are as follows: the regulated non-proportional extension strength is above 245MPa; the tensile strength is above 265MPa; and the percentage elongation after fracture is above 9%. When ensuring experiment requirement of the aluminum profiles used for the coal cars, the performances can simplify the process flow for assembling car bodies, improve the production efficiency, shorten the production cycle and reduc ethe production cost; and the method has remarkable economic benefit.