Invention Grant
- Patent Title: Method of production of high-strength hollow bodies from multiphase martensitic steels
- Patent Title (中): 从多相马氏体钢生产高强度中空体的方法
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Application No.: US13364060Application Date: 2012-02-01
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Publication No.: US08852367B2Publication Date: 2014-10-07
- Inventor: Bohuslav Ma{hacek over (s)}ek , Hana Jirková , Pavel Hronek , Ctibor {hacek over (S)}tádler , Miroslav Urbánek
- Applicant: Bohuslav Ma{hacek over (s)}ek , Hana Jirková , Pavel Hronek , Ctibor {hacek over (S)}tádler , Miroslav Urbánek
- Applicant Address: CZ
- Assignee: Zapadoceska Univerzita v Plzni
- Current Assignee: Zapadoceska Univerzita v Plzni
- Current Assignee Address: CZ
- Agency: Hovey Williams LLP
- Priority: CZPV2011-90 20110218
- Main IPC: C21D8/10
- IPC: C21D8/10 ; C21D9/08

Abstract:
A method of production of high-strength hollow bodies from multiphase martensitic steels includes a heating process, a forming process and a cooling process. A heating device heats hollow steel stock to the austenitic temperature of the material from which the stock is made. The stock is then converted by deformation in a forming device into a hollow body having the final shape. A cooling device thereafter cools the hollow body such that the material with the original austenite microstructure refined by deformation during the forming process cools to a temperature at which incomplete transformation of austenite to martensite occurs. The retained austenite stabilization is performed in an annealing device by diffusion-based carbon partitioning within the material from which the hollow body is made. The hollow body is cooled in a cooling device to ambient temperature after stabilization.
Public/Granted literature
- US20120273095A1 Method of Production of High-Strength Hollow Bodies from Multiphase Martensitic Steels Public/Granted day:2012-11-01
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