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A kind of technology was proposed for the development of low-temperature bainitic microstructure in the surface layer of low-carbon gear steel 20CrMnMo, which is based on carburization and succedent low-temperature austempering. The carbon content in the surface carburization layer increases to 0.81wt.%, making the martensite starting point depressed. Low-temperature bainite formed in the carburization...
A method is proposed for the development of a low-temperature bainitic microstructure in the surface layer of low-carbon steel that is based on carburization and succedent low-temperature austempering. The surface hardness can reach ∼620HV, and a compression residual stress of ∼196MPa can be produced in the surface layer. This type of microstructure is potentially used for the manufacture of heavy-duty...
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