METHOD FOR HEAT TREATING A STEEL COMPONENT
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United States of America Patent
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Issued Date -
Apr 18, 2024
app pub date -
Oct 10, 2023
filing date -
Oct 17, 2022
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Abstract
A method for heat treating a steel component includes heating the component to a temperature at or above the austenitizing temperature and holding the component at or above the austenitizing temperature for a time sufficient to at least partially austenitize the steel, cooling the component to a first temperature in a temperature range of 200° C. to 270° C. and holding the component in the temperature range for at most 6 hours, thereby transforming at least a portion of the austenite into bainite, cooling the component to a temperature of from −30° C. to 30° C., thereby forming martensite; and reheating the component to a second temperature in the temperature range, holding the component in the temperature range for at most 6 hours and then cooling the component to a temperature of from −30° C. to 30° C., thereby transforming a further portion of the austenite into bainite and forming tempered martensite.
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