Testing device and method for high temperature oxidation properties of material under stress action

Abstract

The invention discloses a testing device and method for high temperature oxidation properties of a material under stress action. The testing device comprises an automatic temperature control furnace, wherein a stress loading rod is arranged in the automatic temperature control furnace; a plurality of gas cylinders are communicated with the interior of the automatic temperature control furnace through a gas mixing collecting box. The testing method comprises the following steps: fixing a sample onto the stress loading rod, and then loading the assembled stress loading rod into the automatic temperature control furnace; fixing one end of the stress loading rod and connecting the other end of the stress loading rod with a weight; opening the valves of the gas cylinders to enable gases to be fully mixed in the gas mixing collecting box and then introducing the mixed gas into the automatic temperature control furnace to be heated; after sample oxidation, taking out the sample and weighing, so as to obtain an oxidation kinetic curve of the sample under the condition of bearing tensile stress. According to the invention, the weight is adopted for stress loading, the temperature control furnace of a sealing structure is adopted for providing the temperature environment, where the sample is positioned, and a flow control mechanism is adopted for providing the oxidizing atmosphere, where the sample is positioned, so that influences of stress oxidation on materials is researched more comprehensively.

Description

technical field [0001] The invention relates to a testing device and a measuring method for high-temperature oxidation performance of materials under stress. Background technique [0002] The oxidation resistance of materials is an important physical property of materials, which directly affects the application environment of materials. Different from general structural materials, the anti-oxidation ability and durable strength of high-temperature engineering materials under high temperature determine its application environment. Increasing the steam pressure and temperature of the boiler is an effective way to improve the efficiency of the boiler. With the increase of the operating parameters of the boiler, the service performance of the material is getting worse. The oxidation behavior of the material is accelerated, and the oxidation resistance of the material is also changed. [0003] High-temperature oxidation tests include weighing method, volume method, pressure gau...

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Problems solved by technology

[0006] The oxidation resistance of materials at high temperatures is one of the elements of heat-resistant steel selection, and now the means of investigating the high-temperature oxidation resistance of materials at high temperatures (above 300 ° C) is mainly to place the samples in an oxidizing atmosphere in a high-temperature environment Conduct studies that do not take into account the oxidation resistance of the material under service conditions

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