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

A life and component technology, applied in the field of on-site rapid evaluation of remaining life of high-temperature components based on hardness testing, can solve problems such as industrial production interruption, high cost, and large economic loss

Active Publication Date: 2013-04-24
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID +1
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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, res

Method used

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

Examples

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Example Embodiment

[0060] Such as figure 1 Shown is the flow chart of the method for on-site rapid evaluation of the remaining life of high-temperature components based on hardness testing of the present invention, including the following steps:

[0061] (1) First determine the hardness testing instrument and make high temperature test samples

[0062] For example, a Vickers hardness measuring instrument is used as a laboratory test instrument. Determine the heating temperature of the test piece according to the national standard and the actual working temperature of the high-temperature component. For example, the working temperature fluctuates above 735℃, and the test temperature can be 685℃, 735℃ and 800℃.

[0063] (2) Determine the number of laboratory tests for each group according to the temperature

[0064] Hardness samples are made according to the national standard, and at least two tests are carried out for each test condition. Because the higher the temperature, the more scattered the test d...

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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 ...

Claims

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Application Information

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IPC IPC(8): G01N3/28G01N3/40
Inventor 钟万里王伟轩福贞刘长虹涂善东
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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