This trial is designed to study the structure of metal levels in a comma. To check on the sectoral (Macro-scopic examination) is to examine the structure.Metallurgy of sample pieces using expanding low to prepare a piece of rough polishing polishing in detail by polishing (Polishing) and offered up a notch milling (Etching) check by naked eye (Visual inspection) or if it is used, it will be used to expand capacity in the low level of not more than 10 times.-Verification level comma (Micro-scopic examination) is to examine the structure of the.The metal work piece using a higher, that is, expanding from 10 onwards, where the primary device is used to check the structure reasonableness for a political microscope level comma are metallurgy (Metallurgical microscope) or use an ordinary light microscope (Optical microscope), as shown in Figure 1 are expanding between 10-1000 times higher that at this knowledge makes it possible to recognize the type of phase (Phase) of the structure (Structure) that appear in all shapes and sizes, including the behavior of the phase or structure.
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