Isothermal thermal compression device and method for high-temperature alloy

Abstract

The invention provides an isothermal thermal compression device for high-temperature alloy. The isothermal thermal compression device comprises a pressure rod and a high-temperature furnace for performing isothermal heating on a sample and the pressure rod, wherein the pressure rod comprises an upper pressure rod and a lower pressure rod which are correspondingly positioned right above and right below the sample; the sample is subjected to isothermal thermal compression in the high-temperature furnace through the upper pressure rod and the lower pressure rod; the high-temperature furnace comprises a hearth and second temperature measuring pieces positioned in the hearth; an upper heating group for heating the upper pressure rod, a middle heating group for heating the sample and a lower heating group for heating the lower pressure rod are arranged in the hearth; the second temperature measuring pieces are arranged on the upper pressure rod, the lower pressure rod and the sample; the three heating groups are matched with the corresponding second temperature measuring pieces, so that isothermal heating of the upper pressure rod, the lower pressure rod and the sample is realized; and the cold end effect is reduced by setting three-area temperature control. The invention also provides a method for performing an experiment by using the isothermal thermal compression device. The method is easy to operate and easy to implement.

Description

technical field [0001] The invention relates to the technical field of thermal compression experiments, in particular to a device and method for isothermal thermal compression of superalloys. Background technique [0002] Superalloys refer to a class of metal materials based on iron, nickel, and cobalt that can work for a long time at high temperatures above 600°C and under certain stresses. When studying the evolution of the alloy microstructure under different strains, a high-throughput method is used to compress the double-conical truncated sample at one time to obtain different strain values. In order to ensure the accuracy of the experimental results, the temperature uniformity of the sample is particularly important. [0003] In the prior art, thermal compression experiments are generally carried out on the Gleeble thermal simulation testing machine. In this method, the heating method of the sample is resistance heating, that is, the metal sample itself is used as the ...

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Problems solved by technology

The heat of the upper and lower heating furnaces is used to heat the sample, but because the upper and lower heating furnaces are not a whole, there is a distance between them, so the sample will have a certain heat loss; in addition, the distance between the upper heating furnace and the lower heating furnace and the sample There is a certain distance, and there will be a temperature difference between the sample and the heating furnace, which makes it impossible to accurately control the heating temperature of the sample

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