METHOD FOR MANUFACTURING A HIGH STRENGTH STEEL PLATE AND HIGH STRENGTH STEEL PLATE
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United States of America Patent
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Issued Date -
Jul 4, 2024
app pub date -
May 19, 2022
filing date -
May 20, 2021
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Abstract
The present disclosure relates to a method for manufacturing a high strength steel plate, comprising the step of providing a hot-rolled steel plate, the step of heating the steel plate to an austenitisation temperature range, the step of quenching the steel plate in two stages with a different cooling speed applied to each stage, the cooling speed of the first stage being higher than the cooling speed of the second stage, the first stage of the two-stage quenching step ending at a temperature range above Ms and the second stage of the quenching step starting at a temperature range above Ms and ending at a temperature range between Ms and Mf, the step of partitioning the steel plate. The disclosure also relates to a high strength steel plate manufactured with the method.
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