Optical transfer function roll-off widens stringer boundary ramps, causing inter-laboratory inclusion rating divergence unless corrected by spatial calibration.
Standardized metallographic polishing and selective chemical tinting enable accurate optical calibration of carbides and retained austenite in tool steel slitting dies.
Automated optical image analysis of tool steel inclusions requires rigid thresholding, unetched diamond polishing, and 100 mm² field rastering to ensure accuracy.
Gas-atomized tool steel solidification kinetics suppress coarse primary carbides, enabling sub-micron MC distributions that eliminate slitting blade micro-chipping.
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