Roll high and low times test what?
High times detection is the roller blank according to the provisions of sampling, preparation of metallographic test,then according to the requirements of the standard, respectively in the corrosion and corrosion under the condition of not certain factor, amplification under the microscope, to observe the tissue, can detect the content includes: the inclusion level, carbide network level, liquid precipitation carbide grade, quenching grain size,microstructure and micro strip structure.
Low times test is surface polishing will roll or blank according to the provisions of the sample, and acid leaching,corrosion, after cleaning with the naked eye or conventional a magnifying glass to observe, measure roller porosity and segregation of state and other slag inclusion, shrinkage, cracks and other defects.
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