Density measurement equipment and method for variable-temperature metal

Abstract

The invention discloses density measurement equipment and method for variable-temperature metal. The density measurement equipment comprises an image acquisition system and a sample test system, wherein a CCD (charge coupled device) camera and a laser source of the image acquisition system are distributed at two ends of a furnace body respectively, and the CCD camera, laser source and the furnace body are mounted on the same track; the CCD camera is connected with a video controller which is connected with a computer and image processing software; a sample table and a heating element are mounted in the middle of the furnace body, and optical windows are mounted at two ends of the furnace body; a gas inlet and a gas outlet are formed in two sides of the furnace body respectively, and the gas outlet is connected with a vacuum pump; a thermocouple is arranged in the furnace body and connected with a temperature controller. During detection, a sample is heated to a required measurement temperature through the temperature controller, sample images are acquired and analyzed through the image acquisition system and the image processing software, the volume of the measured sample is obtained, and the density of the sample at the temperature is obtained through calculation. The operation is simple, the data are precise, and the measurement object range is wide.

Description

technical field [0001] The invention belongs to the technical field of density measurement, and in particular relates to a temperature-variable metal density measurement device and its measurement method, which can quickly and accurately measure the density of metals at different temperatures, and is suitable for most metals (including alloys) in solid or molten states. density determination. Background technique [0002] Density is an important physical quantity to quantitatively describe the properties of substances, and reflects the aggregation state of substances due to different intermolecular forces, which is of great significance to physics, metallurgy, and materials science. For liquid metals, density is an important parameter to study properties such as structure, surface tension, viscosity and diffusion. As the temperature rises, metals and alloys will undergo solid-state phase transitions, and when the temperature continues to increase to the melting point, solid...

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Problems solved by technology

[0003] At present, there are many methods to measure the density of metals at room temperature. However, for variable temperature, especially the density of metals at high temperature and liquid metals with high melting point and high chemical activity, there is still a lack of fast and accurate measurement methods.

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