High-temperature and high-pressure metal degradation characteristic detection method and device based on LIBS (Laser-induced Breakdown Spectroscopy)

The invention discloses an LIBS (laser-induced breakdown spectroscopy)-based high-temperature and high-pressure metal degradation characteristic detection method and device. The method comprises the following steps: constructing a database model; preparing a sample; preparing a plurality of metal steel pipe samples made of the same material as an actual product; training samples; stretching the plurality of samples through different temperatures and tensile forces; analyzing the sample; taking out the sample, and carrying out metallographic microscopic analysis on a plurality of surfaces with different cross sectional areas of the sample to obtain an analysis result; performing laser irradiation on the sample to obtain corresponding spectral information, and associating the spectral information with the degradation grade; constructing a database; storing the spectrum-degradation data; online detection: detecting the surface characteristics of the product through a detection device; and after the spectral info