QT HEAT TREATED HIGH CARBON HOT ROLLED STEEL SHEET, HIGH CARBON COLD ROLLED STEEL SHEET, QT HEAT TREATED HIGH CARBON COLD ROLLED STEEL SHEET, AND MANUFACTURING METHODS THEREOF
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United States of America Patent
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Issued Date -
Mar 7, 2024
app pub date -
Dec 10, 2021
filing date -
Dec 21, 2020
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Abstract
Provided are a QT heat treated high carbon hot rolled steel sheet, a high carbon cold rolled steel sheet, a QT heat treated high carbon cold rolled steel sheet, and manufacturing methods thereof, wherein the QT heat treated high carbon hot rolled steel sheet comprises, in weight %, C: 1.0-1.4%, Si: 0.1-0.4%, Mn: 0.1-0.8%, Cr: 0.3-11%, W: 0.05-2.5%, P: 0.03% or less, S: 0.03% or less, Al: 0.02% or less, and the balance being Fe and other inevitable impurities, the average size of carbides being 0.1-20 μm.
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