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Hardware Knowledge: bearing steel metallurgy three defects
    点击数:6152         日期:2014/4/4
According to the inspection method of all kinds of bearing steel in general can be divided into macro and micro defect two categories. Strict control of these technical indicators and to reduce as far as possible, is the main content of the technical requirements of the various types of bearing steel. These are the common defects of steel.
1, micro defects: micro defects of steel include amplifying repair under optical microscope can be found in all types of non-metallic inclusions in steel, carbide segregation, carbide network and banded, annealing organization does not mean.
All kinds of bearing steel special scale control of these defects have strict rules.
2, the macro defect: including surface visual inspection can be found in spots, crack, folding, cracking, scratch, scarring and slag and low times pickling examination can be found in the shrinkage porosity, subcutaneous bubble, white, burning, central loose, loose and segregation, surface decarburization. These are the main defect of steel purity and uniformity.
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