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CONTROLLED QUENCHING OF HOT ROLLED STEEL ROD OR BAR
CONTROLLED QUENCHING OF HOT ROLLED STEEL ROD OR BAR
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机译：热轧棒材或棒材的控制淬火
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摘要
Steel rod or bar comprises an outer surface layer of ferrite-pearlite type structure, an annulus immediately below the layer having an acicular micro-structure comprising martensite and/or bainite and a core of bainite or martensite or ferrite and carbides or a combination of two or more or ferrite and carbides or a combination of two or more of these constituents. The outer layer of ferrite-pearlite has greater resistance to stress corrosion than conventional couter layers of martensite or bainite.
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