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Fast detection method for aluminum alloy hardenability by electro-conductibility

A technology of electrical conductivity and hardenability is applied in the field of using electrical conductivity to rapidly detect the hardenability of aluminum alloys, which can solve the problems affecting the mechanical properties of the alloy during the aging process and the hardenability of the alloy, so as to improve the heat treatment process and improve the hardenability. , detect fast and effective effects

Active Publication Date: 2012-07-18
GRIMAT ENG INST CO LTD
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  • Application Information

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Problems solved by technology

With the increase of the cross-sectional size of the alloy, during the quenching process after solid solution, the core of the alloy is likely to be impenetrable, which will affect the subsequent aging process and the mechanical properties of the alloy.

Method used

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  • Fast detection method for aluminum alloy hardenability by electro-conductibility
  • Fast detection method for aluminum alloy hardenability by electro-conductibility

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Embodiment 1

[0031] 7B04 and 7150 aluminum alloy thick plates are widely used in aircraft manufacturing, and 7150 aluminum alloy is a high-purity aluminum alloy, which is one of the preferred aluminum alloy materials in new aircrafts. safety is of great importance. For 7B04 and 7150 aluminum alloy thick plates (thicknesses are both 150mm), according to the aforementioned sampling method, take cylindrical samples with a diameter of 50mm; After solid solution for 3 hours, water quenching was carried out respectively; after the sample was cooled, the cylindrical sample was cut into 30 cylindrical slices with a height of 5mm, and the electrical conductivity was measured on the end quenching surface, the cutting surface and the uppermost end surface of the cylindrical sample. Value, and drawn into a curve; conductivity measurement in accordance with the corresponding national standards. figure 1 It is the conductivity curve of 7B04 aluminum alloy thick plate and 7150 aluminum alloy thick plate...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/04
Inventor 朱宝宏熊柏青张永安刘红伟王锋李志辉
Owner GRIMAT ENG INST CO LTD
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