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Method for determining service life and reliability of high-temperature high-pressure component by utilizing ultrasonic

A high-temperature, high-pressure, high-reliability technology, which is applied to the analysis of solids using sound waves/ultrasonic waves/infrasonic waves, can solve problems such as complex on-site conditions and long test periods.

Inactive Publication Date: 2009-08-19
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Considering that the test period of this method is relatively long, there is a certain degree of material loss, and the site conditions are more complicated, it is necessary to develop a method that can directly detect high-temperature and high-pressure components and obtain their service life and related reliability. method and device

Method used

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  • Method for determining service life and reliability of high-temperature high-pressure component by utilizing ultrasonic
  • Method for determining service life and reliability of high-temperature high-pressure component by utilizing ultrasonic
  • Method for determining service life and reliability of high-temperature high-pressure component by utilizing ultrasonic

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Embodiment 1

[0016] figure 1 It is a flowchart for determining the service life of high-temperature and high-pressure components using ultrasonic testing probes and connecting devices. In module 1, the longitudinal wave waveform of the ultrasonic wave in the material is obtained through the ultrasonic probe, and converted to the ultrasonic velocity v; in module 2, the information of the inspected material (material type, component size) and prediction information (service temperature T, service stress σ and reliability R); in module 3, through the numerical conversion algorithm, the Dv value is determined according to the relationship between the ultrasonic longitudinal wave velocity v in different materials and the material damage state parameter Dv, and according to the material damage state parameter Dv and the high temperature durable The relationship between the performance deviation from the average value Z determines the Z value, according to the relationship between the reliability...

Embodiment 2

[0018] figure 2 It is a flowchart for determining the service life of high-temperature and high-pressure components using ultrasonic testing probes and connecting devices. Wherein module 1 is consistent with embodiment 1, obtains the longitudinal wave waveform of ultrasonic wave in material by ultrasonic probe, and converts to ultrasonic velocity v; Obtains and acquires the information (material type, component size) and prediction information ( Service temperature T, service stress σ and service time t r ); in module 6, through the numerical conversion algorithm, the Dv value is determined according to the relationship between the ultrasonic longitudinal wave velocity v and the material damage state parameter Dv in different materials, and according to the deviation from the average value of the material damage state parameter Dv and high-temperature durability The relationship between Z determines the Z value, according to the relationship Z=A+f[P(t r , T)]-log(σ) to dete...

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Abstract

The invention discloses a method used for obtaining the service life and the reliability of a high-temperature high-pressure component by utilizing ultrasonic, belonging to the technical field of high-temperature component service life prediction. The method is characterized by comprising the steps of obtaining the ultrasonic velocity V1 in the material to be detected by using an ultrasonic apparatus; according to the ultrasonic velocity V1, obtaining a material damage state parameter Dv, and further obtaining a mean value * of the deviation of high-temperature permanent properties of the damaged material; and according to * is equal to A plus f (P (tr, T)) minus log (Sigma), calculating the service life tr of the component under the set temperature t and the stress Sigma, wherein A is a permanence property distribution parameter and obtained by the following formula: R is equal to Phi (A / s), wherein R is the selected reliability, Phi (A / s) is a normal distribution function, and s is distribution variance. The invention has the beneficial effects that the method not only can determine the service life of the high-temperature high-pressure component under the set reliability, but also can be used for determining the service reliability of the high-temperature high-pressure component under the set temperature, stress and service time.

Description

technical field [0001] The invention relates to a method for determining the service life and reliability of high-temperature and high-pressure components by using ultrasonic waves, and belongs to the technical field of life prediction of high-temperature components. Background technique [0002] Patent authorization publication number CN1207550C, through accelerated creep rupture experiments on materials that are not aged or in different aging degrees, using the aging characteristic parameter measurement method to describe the aging degree of different samples, and according to the expression between the aging factor and the creep life Calculation of creep service life. Considering that the test period of this method is relatively long, there is a certain degree of material loss, and the site conditions are more complicated, it is necessary to develop a method that can directly detect high-temperature and high-pressure components and obtain their service life and related re...

Claims

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Application Information

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IPC IPC(8): G01N29/07
Inventor 赵杰李萍李东明王来马海涛黄明亮
Owner DALIAN UNIV OF TECH