Study On The Applications Of Image Analyzing In Quantitative Metallography

The microcosmic structure of metal material directly influence to the capability and useful life of mechanism accessory. Metallography analyzing is the important means of controlling inhesion quality. The metallography analyzing technique play a important role in the such fields: the new material , the new technics , the new products and so on. With the development of material science, the researching the more essential connection between structure and component, capability, technics become more and more important. The deep research is quantitative analyzing.So it is necessary to measure and calculate the parameter of alloy metal.Recently Digital Image Process (DIP) develop rapidly and use more widely in analyzing measuring domain. It is worthy problem to research how to make use of computer image-process to analyzing material. The crystal granule size is one of the important character parameters of metal material. It has influence for all capabilities and changes of metal material. The people attach importance to control and assess the crystal granule size in the course of researching and producing. The article mainly discuss the application of Quantitative Metallography Analyzing System (QMAS) in the assess crystal granule size. Particular content includes:(1) Summarize currently development of metallography analyzing in the world; Introduce to the basic conception and principle of Quantitative Metallography; Integrated DIP to give the means of measure the crystal granule size.(2) Discuss some methods of DIP , especially the methods using in QMAS; Give the theory and steps of Scanning-line Seed Filling Method.(3) To heighten precision, scale QMAS accurately by the line-grating and analysis the QMAS error and give the result quantitatively.(4) Capture the image by CCD; Process the image (include editing, pretreatment, binaralizition, and so on); Calculate the crystal granule size.(5) Write QMAS software by Visual Basic and C; Design some modules; Friendly interface and convenient operations.(6) Compare QMAS and man-measurement system. The result appears that QMAS excel to man-measurement system in the fields of speed, precision, efficiency and automation.(7) Give some further ideas to improve the QMAS.