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公开(公告)号：US20220316021A1
公开(公告)日：2022-10-06
申请号：US17596676
申请日：2020-06-11
Applicant: TATA STEEL IJMUIDEN B.V.
Inventor： Shangping CHEN , Richard MOSTERT , Maxim Peter AARNTS , Stefanus Matheus Cornelis VAN BOHEMEN
Abstract: A method of a heat treating a cold rolled steel strip includes the steps of soaking a cold rolled steel strip above (Ac3−20) for a certain soaking duration thereby obtaining a cold rolled steel strip having an austenitic microstructure; cooling the soaked steel strip to below Ms; heating and heat treating the cooled strip in the temperature range of Bs-Ms; and cooling the heat treated strip to ambient temperature.
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公开(公告)号：US20220316025A1
公开(公告)日：2022-10-06
申请号：US17596682
申请日：2020-06-11
Applicant: TATA STEEL IJMUIDEN B.V.
Inventor： Shangping CHEN , Richard MOSTERT , Maxim Peter AARNTS , Stefanus Matheus Cornelis VAN BOHEMEN
IPC: C21D9/52 , C22C38/38 , C22C38/28 , C22C38/26 , C22C38/24 , C22C38/22 , C22C38/20 , C22C38/06 , C22C38/02 , C22C38/00 , C23C2/40 , C21D8/02 , C21D6/00
Abstract: A heat treatment of a high strength cold rolled steel strip includes the steps of a) soaking a cold rolled steel strip, b) cooling the soaked steel strip c) heat treating the cooled strip; d) cooling the heat treated steel strip to ambient temperature range; such that the steel strip has a microstructure including various ferrites, retained austenite and martensite. The main components in the steel composition include carbon, manganese, silicon and aluminium in addition to iron.
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Patent Agency Ranking
公开(公告)号：US20190233928A1
公开(公告)日：2019-08-01
申请号：US16318229
申请日：2017-07-20
Applicant: TATA STEEL IJMUIDEN B.V.
Inventor： Jaap Peter VAN EENENNAAM , Shangping CHEN , Edgar Matthijs TOOSE
Abstract: A method for providing a Zn—Al—Mg coating on a steel strip using a hot dip coating process with a coating bath, wherein the thickness of the coating is controlled using gas knifes above the coating bath. Specific amounts of Mg and Al are chosen, in a relationship wherein the amount of Al is higher than the amount of Mg. Also provided is a steel strip having a Zn—Al—Mg coating provided by hot dip coating.
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公开(公告)号：US20220316024A1
公开(公告)日：2022-10-06
申请号：US17596673
申请日：2020-06-11
Applicant: TATA STEEL IJMUIDEN B.V.
Inventor： Shangping CHEN , Richard MOSTERT , Maxim Peter AARNTS , Stefanus Matheus Cornelis VAN BOHEMEN
IPC: C21D9/52 , C22C38/38 , C22C38/28 , C22C38/26 , C22C38/24 , C22C38/22 , C22C38/20 , C22C38/06 , C22C38/02 , C22C38/00 , C23C2/40 , C21D8/02 , C21D6/00
Abstract: A method of heat treating a high strength cold rolled steel strip including a) soaking a cold rolled steel strip, b) cooling the soaked steel strip c) heat treating the cooled strip; d) cooling the heat treated steel strip to ambient temperature range; such that the steel strip has a microstructure including various ferrites, retained austenite and martensite. The main components in the steel composition includes carbon, manganese, silicon and aluminium in addition to iron.
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公开(公告)号：US20210115527A1
公开(公告)日：2021-04-22
申请号：US16463420
申请日：2017-11-24
Applicant: TATA STEEL IJMUIDEN B.V.
IPC: C21D1/19 , C21D9/00 , C23C2/06 , C22C38/38 , C22C38/34 , C22C38/32 , C22C38/28 , C22C38/26 , C22C38/24 , C22C38/06 , C22C38/22
Abstract: A method for hot-forming a steel blank into an article including the steps of: a. heating a steel blank to a temperature T1 and holding the heated blank at T1 during a time period t1, wherein T1 is in the range of Ac1 to Ac3+200° C. and wherein t1 is at most 12 minutes, b. transferring the heated blank to a hot-forming tool during a transport time t2 during which the temperature of the heated blank decreases from temperature T1 to a temperature T2, wherein T2 is above Ar1 and wherein the transport time t2 is at most 12 seconds, c. forming the blank in the hot-forming tool into an article and quenching it in the hot-forming tool from a temperature T2 to a temperature T3 at a cooling velocity V2 of 25° C./s or more, d. isothermal holding the article at a temperature T4 for a time period t4, e. wherein temperature T3 and/or temperature T4 is between Ms and Mf and wherein t4 is more than 10 seconds and less than 10 minutes, f. cooling the article from temperature T4 to room temperature at a cooling velocity V4. The invention also relates to a hot-formed article obtained by the method.
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公开(公告)号：US20230045924A1
公开(公告)日：2023-02-16
申请号：US17786402
申请日：2020-12-18
Applicant: TATA STEEL IJMUIDEN B.V.
Inventor： Rolf Arjan RIJKENBERG , Shangping CHEN , Maxim Peter AARNTS
IPC: C21D9/52 , C22C38/38 , C22C38/32 , C22C38/28 , C22C38/26 , C22C38/24 , C22C38/22 , C22C38/06 , C22C38/02 , C22C38/00 , C21D8/02 , C21D6/00
Abstract: The invention relates to a high strength steel with a careful selection of the normal alloying elements C, Mn, Si and Al, together with micro-element addition. This a steel with a high strength and high hole expansion ratio can be produced. The invention also relates to the method to manufacture this high strength steel.
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公开(公告)号：US20220316026A1
公开(公告)日：2022-10-06
申请号：US17596685
申请日：2020-06-11
Applicant: TATA STEEL IJMUIDEN B.V.
Inventor： Shangping CHEN , Richard MOSTERT , Maxim Peter AARNTS , Stefanus Matheus Cornelis VAN BOHEMEN
IPC: C21D9/52 , C22C38/38 , C22C38/28 , C22C38/26 , C22C38/24 , C22C38/22 , C22C38/20 , C22C38/06 , C22C38/02 , C22C38/00 , C23C2/40 , C21D8/02 , C21D6/00
Abstract: A method of heat treating a cold rolled steel strip includes soaking a cold rolled steel strip having a specific composition above (Ac3−60)° C. for a certain duration thereby obtaining a cold rolled strip having a partially austenitic microstructure; cooling of the resulting soaked steel strip to a temperature below Ms; heating and heat treating the cooled steel strip in the temperature range of Bs-Ms; and cooling the heat treated steel strip to ambient temperature.
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