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Dual Phase Steel, Ultra High Strength with excellent toughness at cryogenic temperatures and Methods for preparing such Steels
Dual Phase Steel, Ultra High Strength with excellent toughness at cryogenic temperatures and Methods for preparing such Steels
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机译：双相钢，在低温下具有出色韧性的超高强度钢及其制备方法
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摘要
2. A method for making biphasic films, which consists of a volume of about 10% to 40% in the first stage of iron, and about 60% to 90% in the second stage, mainly martensita on the fine particle plate, Benita under the fine particle or a mixture thereof, The method comprises the steps of (a) heating the steel plate to a high temperature sufficient to (I) achieve substantial homogenization of the steel plate, and (II) dissolving all niobium and vanadium carbides and carbides in large quantities on the steel plate,Y (III) install the initial hardening film on the steel plate; (b) compress the steel plate into one or more steel sheets on the hot rolling pass, and strengthen the hardening within the first temperature range; (c) The steel film is further compressed into one or more hot rolling passes, cooled for two stages, lower than TNR temperature (lower than this temperature, no reheating) and higher than Ar3 transformation temperature;(austenita began to change to ferrita's temperature as it cooled.). (d) The sheet is further compressed into one or more hot rolling passes so that it reaches the third stage between the temperature change and the temperature changeR3 (the temperature at which Austin begins to change into ferrita when it cools down) and AR1 (the temperature at which Austin is completed to change into ferrita or ferrita plus cement when it cools down).
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