Quantitative evaluation method for creep damage microstructure evolution of heat-resistant steel
A technology of microstructure and heat-resistant steel, applied in the direction of testing metal structure, testing metal, material inspection products, etc., can solve problems such as long-term testing, without considering the material damage process, etc., to reduce equipment accidents and ensure long-term equipment cycle. The effect of safe operation and reasonable arrangement of maintenance cycle
Pending Publication Date: 2021-10-22
CHINA SPECIAL EQUIP INSPECTION & RES INST
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[0008] For this reason, the present invention provides a quantitative evaluation method for creep damage microstructure evolution of heat-resistant steel to solve the problem that traditional creep life evaluation methods in the prior art require long-term tests and do not consider material damage during actual service process problem
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[0040]The implementation mode of the present invention is illustrated by specific specific examples below, and those who are familiar with this technology can easily understand other advantages and effects of the present invention from the contents disclosed in this description. Obviously, the described embodiments are a part of the present invention. , but not all examples. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention. Terms such as "upper", "lower", "left", "right", and "middle" quoted in this specification are only for convenience of description, and are not used to limit the scope of the present invention. The change or adjustment of the relative relationship shall also be regarded as the implementable scope of the present invention without substantive change of the technical content.
[0041] Since the deform...
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The invention discloses a quantitative evaluation method for creep damage microstructure evolution of heat-resistant steel, and relates to the technical field of material detection. The quantitative evaluation method compeises the following steps: 1) extracting microstructure evolution characteristic parameters of a material, which influence the creep life in a high-temperature creep process; 2) finding out a rule of microstructure evolution characteristic parameters changing along with temperature and time; 3) establishing a change relation curve between the microstructure evolution characteristic parameter and a creep life characterization characteristic parameter LMP; 4) analyzing microstructure evolution characteristic parameters of a given material in a certain creep damage state, and determining an LMP value corresponding to the microstructure evolution characteristic parameters according to the change relation curve; and (5) judging the damage degree of the material according to the known endurance test data of the material and the LMP numerical value, performing quantitative evaluation on the creep life of the material. The method has important significance in reducing accidents of equipment and guaranteeing long-period safe operation of the equipment.
Description
technical field [0001] The invention relates to the technical field of material detection, in particular to a quantitative evaluation method for creep damage microstructure evolution of heat-resistant steel. Background technique [0002] In ultra (super) critical units and other fields of petrochemical and energy metallurgy, many metal parts have been in service for a long time under high temperature and high pressure conditions, and the internal structure and comprehensive mechanical properties of the materials used will change greatly with time. The life of the component is greatly reduced, and eventually failure is caused. The failure of most bearing parts in high temperature environment is caused by high temperature creep caused by high temperature and high pressure. Creep failure is the most common failure mode of high-temperature service components or equipment. The damage or aging of materials in the creep process is a time-related process. How to predict the damage ...
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Login to View More IPC IPC(8): G01N33/204
CPCG01N33/204
Inventor 顾宝兰
Owner CHINA SPECIAL EQUIP INSPECTION & RES INST