Method for manufacturing aluminum alloy profiles for side walls of rail transit vehicles

Abstract

The invention discloses a method for manufacturing aluminum alloy profiles for side walls of rail transit vehicles, which includes steps of a, billet batching, b, billet smelting, c, billet casting, d, homogenizing, e, billet surface treatment, f, billet heating, g, mould heating, h, extruding, i, online quenching, and j, profile aging. Parameters of the processing steps are controlled well. Larger sections and better comprehensive properties of aluminum profiles can be achieved, requirements of the aluminum profiles on vehicle use are met, vehicle manufacturing cost is lowered, vehicle weight can be reduced, and the shortages of heavy weight, high maintenance difficulty, high auxiliary equipment cost and the like of the steel-structured vehicles are overcome. In addition, energy consumption in manufacture by the method is only one fifth of that in stainless manufacture, water consumption is only one fifth of that in manufacture of stainless steel cars, and weight of the cars is reduced by one third. Proof strength of non-proportional extension can reach more than 255MPa, tensile strength can reach more than 300MPa, and elongation after facture can reach more than 11%.

Description

technical field [0001] The invention relates to the field of aluminum alloy manufacturing, in particular to a method for manufacturing an aluminum alloy section material for a side wall of a rail transit vehicle body. Background technique [0002] In the era of rapid development of high-speed railways, for more than ten years, domestic and foreign countries have been discussing about the development of high-speed railways, which is better to use aluminum alloy or stainless steel as the material of the carriage floor? Through the test, it is found that the use of aluminum alloy profiles can initially meet the requirements. However, in the prior art, the cross-section of the aluminum alloy profile for the side wall of the rail transit car body is relatively small, which causes more welds, increased welding deformation, and difficult assembly; and welding will cause performance degradation, and more welding processes It will cause the decline of the performance of the whole ve...

AI Technical Summary

Problems solved by technology

However, in the prior art, the cross-section of the aluminum alloy profile for the side wall of the rail transit car body is relatively small, which causes more welds, increased welding deformation, and difficult assembly; and welding will cause performance degradation, and more welding processes Will cause the performance of the entire vehicle body to decline

Moreover, the production process of the side wall of the rail transit car body is more complicated, the production efficiency is revealed, the production cycle is longer, and the production cost is higher.

The production of large-section profiles is an effective way to solve the above problems. However, the production of large-section profiles is also difficult. In the production process, if the process is not properly selected, many unnecessary defects will be produced on the profiles.

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