Method for fast evaluating high temperate member residual service life on spot

Abstract

The invention discloses a method for fast evaluating high temperature member residual service life on spot. The method comprises a first step of obtaining test pieces with different aging damages through heat treatment, a second step of measuring hardness of materials under different aging damages, a third step of adopting a least square method for fitting a functional expression of parameters such as hardness-residual service life, a fourth step of using practical structure materials to do tensile creep and hardness tests to obtain a correction factor and a calibration curve of hardness-residual service life of a practical running structure, and a fifth step of fast evaluating structural residual service life according to the calibration curve and surface hardness measured on the spot. According to the method for fast evaluating high temperature member residual service life on the spot, health consultation of a device can be provided concisely and fast on the spot, and requirements of operating maintenance of production equipment are met. Interruption of production is not needed, the equipment can not be damaged, a test cycle is short, cost is low, and the method for fast evaluating high temperature member residual service life on the spot is very sensitive and can meet the requirements.

Description

technical field [0001] The invention relates to a method for evaluating the remaining life of a high-temperature component, in particular to an on-site rapid evaluation method for the remaining life of a high-temperature component based on hardness detection. Background technique [0002] In modern industries, such as power plants, petrochemicals, etc., a considerable number of devices work in high temperature and high pressure environments. This type of equipment is expensive, and most of them rely on imports. Taking the high-temperature furnace tube as an example, the investment in the furnace tube accounts for about 50-60% of the total furnace investment, and the steel consumption accounts for about 40-50%. Therefore, through life analysis and management, formulating a scientific maintenance plan is very important to ensure the maximum utilization of resources and realize the long-term safe operation of production equipment. [0003] For nearly half a century, the life ...

AI Technical Summary

Problems solved by technology

This method will not only cause great damage to the actual operating equipment, but also has a long test period and high cost, resulting in long-term interruption of industrial production and large economic losses.

For existing non-destructive measurement techniques, such as density method, resistance method, ultrasonic energy attenuation method, etc., it is mainly to detect the existence of crack defects, but for grain boundary holes and carbide particle precipitation caused by equipment service damage, etc. , the existing methods are not sensitive and cannot meet the requirements

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