Fast detection method for aluminum alloy hardenability by electro-conductibility

Abstract

The invention provides a method for rapidly detecting the hardenability of aluminum alloy by utilizing electrical conductivity. The method comprises the following steps that: an aluminum alloy material comprises an aluminum alloy board or forging; after the aluminum alloy material is subjected to solution treatment, the solid-solution state aluminum alloy material is subjected to end quenching treatment; the electrical conductivity of the positions on the solid-solution state aluminum alloy material after end quenching treatment is measured, wherein the positions are at different distances from an end quenching surface where a quenching end is; and by taking a distance from the quenching end as abscissa and taking the electrical conductivity of the positions at different distances from the quenching surface as ordinate, the measured electrical conductivity of the positions at different distances from the quenching surface is connected into a curve so as to determine the hardenability of the aluminum alloy material. Due to the detection method, the hardenability of wrought aluminum alloy can be rapidly and accurately evaluated.

Description

technical field

[0001] The invention relates to a method for rapidly detecting the hardenability of a deformed aluminum alloy by using electrical conductivity. Background technique

[0002] Al-Zn-Mg-Cu and Al-Cu-Mg series aluminum alloys belong to 7000 series and 2000 series high-strength aluminum alloys respectively. They are typical age-strengthened aluminum alloys and are widely used in the aerospace field. Most age-strengthable aluminum alloys require first solution treatment before aging heat treatment. Whether the solution treatment is complete or not directly affects the subsequent aging heat treatment, which in turn affects the final properties of the alloy. Due to the high thermal conductivity of aluminum alloy and fast heat dissipation, aluminum alloy structural parts with small cross-sectional dimensions do not have the problem of hardenability. However, the rapid development of the aerospace industry requires the use of a whole piece of high-strength aluminum a...

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