Decarburization and Your Precision Machine Shop
Decarburization is a clue that can help us pinpoint when in the steel making and processing history that defect was created.
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My Steel Won't Harden!
There are only a handful of things to check when your steel parts fail to respond to quench and temper heat treatment. Here’s my list in decreasing probability order: Mixed steel / wrong steel being heat treated. Decarburization on the surface. Failure to heat it above the austenitizing temperature. Failure to hold it for sufficient…
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Quench Cracks- 3 Ways to Recognize
As-quenched Martensite is hard and brittle- it has virtually no ductility. Quench cracks result from stresses produced during the transition from Austenite to Martensite, which involves an increase in volume. Quench cracks run from the surface towards the center of mass in a fairly straight line; Quench cracks do not have decarburization apparent, since the quenching occurs at relatively low temperatures; The fracture surfaces of quench cracks will exhibit a very fine crystalline structure.
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Slivers On Rolled Steel Products
Slivers are loose or torn segments of steel that have been rolled into the surface of the bar. they are often confused with laps, scabs, and mill shearing.
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7 Causes For Quench Cracking Of Steel
Seven reasons for quench cracking failures in steel.