The Chemical Composition Effect of Medium-Carbon Chromomanganesemolybdenum Steel on the Structure of Drill Pipes

(Retracted) Image restoration and quantitative metallographic tissue based on machine vision

“…Using the principle of quantitative metallography, the 3D spatial morphology of the alloy structure is determined by the measurement and calculation of the metallographic microstructure of the ground surface or thin film of the two-dimensional metallographic sample, thereby establishing the quantitative relationship among the alloy composition, structure, and properties. Although the optical microscope has the advantages of simplicity and convenience, the recognition degree is not high, and it can only observe the micron-level standard fine section of the structure 17 . To obtain a higher recognition rate to observe finer structural components, a new generation of electron microscopes was successfully invented at the beginning of the last century 18 …”

“…Although the optical microscope has the advantages of simplicity and convenience, the recognition degree is not high, and it can only observe the micron-level standard fine section of the structure. 17 To obtain a higher recognition rate to observe finer structural components, a new generation of electron microscopes was successfully invented at the beginning of the last century. 18 Quantitative metallographic calculation mainly includes two steps.…”

“…Considering the huge amount of computation of spatial deconvolution, it is usually necessary to convert the image signal to the frequency domain using fast Fourier transform to solve Eq. (17). The core problem is to perform inverse filtering in the frequency domain:…”