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公开(公告)号：US11535905B2
公开(公告)日：2022-12-27
申请号：US16640147
申请日：2017-08-22
摘要： The invention relates to the use of a Q&P steel for production of a formed component (2) for high-wear applications, wherein the Q&P steel has a hardness of at least 230 HB, especially at least 300 HB, preferably at least 370 HB, and a bending angle α of at least 60°, especially at least 75°, preferably at least 85°, determined to VDA238-100, and/or a bending ratio of r/t
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公开(公告)号：US11371113B2
公开(公告)日：2022-06-28
申请号：US16466894
申请日：2017-12-06
IPC分类号： C21D9/46 , C21D6/00 , C21D8/02 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/12 , C22C38/14 , C22C38/22 , C22C38/26 , C22C38/28 , C22C38/32 , C22C38/38 , C22C38/44 , C22C38/48 , C22C38/58 , C21D9/663
摘要： A hot-rolled flat steel product including (in wt %) C: 0.1-0.3%, Mn: 1.5-3.0%, Si: 0.5-1.8%, Al: ≤1.5%, P: ≤0.1%, S: ≤0.03%, N: ≤0.008%, optionally one or more of Cr: 0.1-0.3%, Mo: 0.05-0.25%, Ni: 0.05-2.0%, Nb: 0.01-0.06%, Ti: 0.02-0.07%, V: 0.1-0.3%, and B: 0.0008-0.0020%, the balance being iron and unavoidable impurities. This flat steel product possesses a tensile strength of 800-1500 MPa, a yield strength of >700 MPa, an elongation at break of 7-25%, and a hole expansion of more than 20%. The structure is at least 85 area % martensite, of which at least half is tempered martensite, with the remainder being ≤15 vol % residual austenite, ≤15 area % bainite, ≤15 area % polygonal ferrite, ≤5 area % cementite and/or ≤5 area % nonpolygonal ferrite, and has a kernel average misorientation of at least 1.50°. Also, a method for producing the flat steel product, wherein the microstructure of the flat steel product is set by the heat treatment.
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公开(公告)号：US20200071785A1
公开(公告)日：2020-03-05
申请号：US16466894
申请日：2017-12-06
IPC分类号： C21D9/46 , C21D8/02 , C21D6/00 , C22C38/58 , C22C38/48 , C22C38/44 , C22C38/38 , C22C38/32 , C22C38/26 , C22C38/28 , C22C38/22 , C22C38/14 , C22C38/12 , C22C38/06 , C22C38/04 , C22C38/02 , C22C38/00
摘要： A hot-rolled flat steel product including (in wt %) C: 0.1-0.3%, Mn: 1.5-3.0%, Si: 0.5-1.8%, Al: ≤1.5%, P: ≤0.1%, S: ≤0.03%, N: ≤0.008%, optionally one or more of Cr: 0.1-0.3%, Mo: 0.05-0.25%, Ni: 0.05-2.0%, Nb: 0.01-0.06%, Ti: 0.02-0.07%, V: 0.1-0.3%, and B: 0.0008-0.0020%, the balance being iron and unavoidable impurities. This flat steel product possesses a tensile strength of 800-1500 MPa, a yield strength of >700 MPa, an elongation at break of 7-25%, and a hole expansion of more than 20%. The structure is at least 85 area % martensite, of which at least half is tempered martensite, with the remainder being ≤15 vol % residual austenite, ≤15 area % bainite, ≤15 area % polygonal ferrite, ≤5 area % cementite and/or ≤5 area % nonpolygonal ferrite, and has a kernel average misorientation of at least 1.50°. Also, a method for producing the flat steel product, wherein the microstructure of the flat steel product is set by the heat treatment.
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