Different metal formations are examined under a metallographic microscope.
From time to time, metallographic workers have observed the microstructure characteristics of metal materials qualitatively from the polished surface of metallographic samples through microscope observation, or used methods of comparing with various standard pictures to evaluate microstructure, grain size, and non-metallic materials. The accuracy of this method is not high, and the evaluation is very subjective, so the reproducibility of the results is not satisfactory, and they are all on the second surface of the polished surface of the metallographic sample. There is a certain gap between the measurement results and the real organization description in three-dimensional space. The emergence of modern stereology provides people with a science of extrapolating from two-dimensional images to three-dimensional space, that is, the data measured on the two-dimensional plane and the theoretical microstructure shape, size, quantity and shape of the metal material in three-dimensional space. It is a science that connects the three-dimensional spatial structure, shape, size, quantity and distribution of materials with their mechanical functions, and provides reliable analytical data for scientifically evaluating materials.
Since the microstructure and non-metallic admixtures in metal materials are not uniformly distributed, the determination of any parameter cannot be determined by measuring one or several fields of view under a microscope with the human eye, and it is necessary to use accounting methods to determine sufficient Only by performing a lot of calculation tasks with more fields of view can the reliability of the measurement results be guaranteed. Assuming that only human eyes are used for visual assessment under the microscope, the accuracy, consistency and reproducibility are poor, and the determination speed is very slow, and some even cannot be carried out due to the heavy workload. The image analyzer replaces human eye observation and calculation with advanced electronic optics and electronic computer technology. It can flexibly and accurately perform calculation-significant measurement and data processing. It also has high precision and good reproducibility, avoiding treatment The influence of factors on the metallographic evaluation results and other characteristics, and the operation is simple, and the measurement report can be directly printed, which has become an indispensable means in quantitative metallographic analysis at that time.
Microscope image analyzer is a powerful instrument for quantitative metallographic research on materials, and it is also a good assistant for daily metallographic inspection. It can avoid subjective errors caused by manual evaluation, and then avoid the phenomenon of scrambling. Although it is impossible and unnecessary to use the image analyzer every time in the daily metallographic inspection, when the product quality is abnormal or the metallographic structure level is between qualified and unqualified and cannot be judged, the image analyzer can be used to analyze It conducts quantitative analysis to obtain accurate results and ensure product quality. The application of image analyzer in metallographic analysis has expanded the detection items of metallographic inspection, promoted the improvement of detection level, and is also very beneficial to improve the quality of detection personnel.
Introduction to the Principle and Function of Microscope Image Analyzer
The system of the image analyzer is an optical imaging system composed of a metallographic microscope and a microscopic camera stage, and its purpose is to make an image of a metallographic sample or photo. The metallographic microscope can directly carry out quantitative metallographic analysis on the metallographic sample; the microscopic camera table is suitable for analyzing metallographic photos, negative films and objects, etc.
