Heat treatment method and heat treatment apparatus
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United States of America Patent
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Sep 6, 2016
Grant Date -
Jan 3, 2013
app pub date -
Sep 14, 2012
filing date -
Nov 1, 2010
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Abstract
A heat treatment method according to the present invention includes a preliminary-state-generating step of heat-treating an alloy that undergoes multiple-step transformation with temperature by bringing the alloy in contact with a contact-type heating element for 0.01 sec or more and 3.0 sec or less, the contact-type heating element being adjusted to a particular temperature within a preliminary-state-generating temperature region determined on the basis of a first temperature related to a particular first transformation of the alloy and a second temperature, which is higher than the first temperature, related to a particular second transformation of the alloy so as to generate a preliminary state in the alloy.
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