Creep-fatigue property testing system with controllable oxygen partial pressure

Abstract

The invention relates to a creep-fatigue property testing system with a controllable oxygen partial pressure. The creep-fatigue property testing system comprises a mixed gas inflating subsystem, a mechanical loading main unit, an inflating high-temperature furnace and a circular water cooling subsystem, wherein the mixed gas inflating subsystem comprises a premixed inflating tank, an oxygen source and an argon source; the oxygen source and the argon source are respectively connected with the premixed inflating tank through mass flowmeters; the mass flowmeters control the oxygen source and the argon source to provide oxygen and argon with preset proportions to the premixed inflating tank according to the preset proportions provided by a computer industrial control subsystem; the inflating high-temperature furnace is arranged between a cabinet of the main unit and a cross beam of the main unit; the circular water cooling subsystem is connected with the inflating high-temperature furnace. The testing system disclosed by the invention is integrally redesigned, and is additionally provided with the mixed gas inflating subsystem, and all key parts are improved by aiming at an application occasion of an oxygenating environment, so that the testing system can meet the demand of a creep-fatigue property test with the controllable oxygen partial pressure, is high in testing precision and stable and safe in operation; the oxygen partial pressure is controllable in multiple stages.

Description

technical field [0001] The invention relates to a material performance testing system, in particular to a creep fatigue performance testing system with controllable oxygen partial pressure. Background technique [0002] In the fields of energy power, petrochemical industry, aerospace and other fields, many structural components operate under complex load conditions for a long time. The research and performance testing of service materials under the interaction of environment-creep-fatigue is the research of the structural integrity of materials. One of the most important links in the process, so a lot of experimental research is needed. [0003] Traditional mechanical testing machines have been widely used in the field of material mechanical performance testing. Common examples include: a creep testing machine for testing the high-temperature creep properties of materials. Through this testing machine, the material is heated to a specified temperature through a high-tempera...

AI Technical Summary

Problems solved by technology

[0004] According to actual working conditions, high-temperature materials are often exposed to different situations such as atmospheric environment, oxygen-enriched environment, or high-altitude anoxic environment, and the demand for material performance testing also develops simultaneously with the complexity of engineering applications. However, generally by adding a high-temperature furnace or environmental chamber The fatigue testing machine or ordinary creep testing machine cannot meet the requirements of the oxygen-filled atmosphere. The usual problems are: unable to maintain pressure, unable to control oxygen partial pressure, no explosion-proof measures, easy oxidation of furnace parts and other technical defects

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