Device for testing metal melt electrical resistivity and testing method therefor

Abstract

The invention discloses a device for testing metal melt electrical resistivity and a testing method therefor. Wherein the device comprises a sample locating device, a gas protection system which is provided with a heating unit and contains the sample locating device to form air-tight protection and an electrical property test system for testing electrical property of the sample in the sample locating device; wherein the electrical property test system comprises a four-electrode and a thermocouple, the sample locating device comprises a crucible which is provided with a cover body and contains the sample and a ceramic boat serving as the carrier of the crucible; wherein the crucible is located in a preset position of the ceramic boat and the cover body is provided with holes for locating the four-electrode on the cover body plane, the ceramic boat is provided with holes for locating the thermocouple and the ceramic boat is provided with a support for fixing and locating the lead of the four-electrode. The technical proposal of the invention has the advantages of high measurement accuracy and wide applicable temperature range.

Description

technical field [0001] The invention relates to a device and a method for testing the resistivity of a metal melt, and belongs to a device and a test method for testing the resistivity of a metal melt by a four-electrode method. Background technique [0002] Casting alloy forming refers to a process in which the alloy changes from liquid to solid state. As the melt in the initial state of the casting, there is an inevitable relationship between its structure, performance and state and the performance of the final casting, that is, the above elements of the liquid melt have a direct impact on the quality of the casting, and often some of its characteristics will be Inherited into the solid state. Therefore, the study of alloy melt structure has received great attention from scholars in the field of materials at home and abroad. At the same time, as an aspect of condensed matter physics and metallic materials, research on the liquid properties of alloy materials is also unde...

AI Technical Summary

Problems solved by technology

The most critical problems in the four-electrode method are: how to select the material of the container and the probe, the placement of the melt sample and the accurate positioning of the measuring electrode probe to ensure the stability and accuracy of the measurement

Some research units have developed some devices for experimental research, but the shortcomings are complex operation, easy oxidation and pollution of test samples, low measurement accuracy and high cost, which cannot meet our experimental requirements.

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