A method for improving the thermal conductivity of metal alloys

Abstract

The invention discloses a method for improving the thermal conductivity of metal alloys with low alloy content—artificial aging heat treatment. The method is suitable for multi-element alloyed metal alloys with a mass percentage of main elements greater than 85wt.%, such as magnesium alloys and aluminum alloys. For titanium alloys, the artificial aging heat treatment temperature is controlled within the range of 100-250°C, and the aging time is controlled within the range of 2-96 hours. According to the aging treatment of metal alloys obtained by different processing methods, the alloy elements involved in the supersaturated solid solution in the alloy are precipitated, or the residual processing stress in the alloy is eliminated, which can improve the thermal conductivity of the alloy at room temperature. Thermal conductivity at room temperature is improved by at least 5%.

Description

technical field [0001] The invention relates to a heat treatment method for metal materials, in particular to a method for improving the thermal conductivity of metal alloys, and belongs to the field of metal material processing and preparation. Background technique [0002] Thermally conductive materials are widely used, and can be divided into metal thermally conductive materials, inorganic non-metallic thermally conductive materials, and organic polymer thermally conductive materials according to their materials. Traditional metal heat-conducting materials have good thermal conductivity at room temperature, are easy to process and shape, and are widely used. Inorganic non-metallic thermal conductivity materials have high thermal conductivity (type 2 diamond, thermal conductivity at room temperature is as high as 2000W / (m·K)), but difficult to process. Organic polymers are currently the most widely used thermally conductive silica gel and thermally conductive silicone gre...

AI Technical Summary

Problems solved by technology

At present, the consensus reached is that at low temperature, the Sommerfeld model is better adapted to the treatment of electronic heat conduction heat capacity, and the Debye model is suitable for the treatment of phonon heat conduction heat capacity; at high temperature, both Drude and dulongpodi models have certain value; However, the intermediate temperature model is more complicated, and each model cannot obtain accurate values, so detailed research is required.

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