Hot-press molding method and hot-press molded product
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsEiichi OTA, Yasuhiro Yogo, Tomoaki Ihara
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AssigneeToyota Jidosha Kabushiki Kaisha
InventorsEiichi OTA, Yasuhiro Yogo, Tomoaki Ihara
Estimating the term…
A hot-press molding method of the present disclosure includes a first heating process in which a steel plate is heated and the entire steel plate becomes austenite, a first cooling process in which a cooling rate of the steel plate after the first heating process is partially changed, a first region which is a part of the steel plate is transformed into martensite, and a second region other than the first region remains as austenite, a second heating process in which the entire steel plate is reheated and the first region becomes tempered martensite, and a second cooling process in which the entire steel plate after the second heating process is cooled. At least one of the first cooling process and the second cooling process is performed during a molding process in which the steel plate is press-molded on a molding die.
A hot-press molding method comprising:
A hot-press molded product comprising a first region having tempered martensite and a second region having martensite.
A hot-press molded product comprising a first region having tempered martensite and a second region having at least one of ferrite, pearlite, and bainite.
Dependencies are inferred from the claim text.