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公开(公告)号:US11090907B2
公开(公告)日:2021-08-17
申请号:US16471203
申请日:2017-12-22
申请人: POSCO
发明人: Ki-Cheol Kang , Hyeon-Seok Hwang , Yon-Kyun Song , Il-Jeong Park
摘要: Provided is a hot dip aluminized steel material including a base steel and a hot-dip Al—Si-coated layer, wherein the surface layer of the base steel is provided with an Al-enriched layer in which 2 wt % to 20 wt % of Al is solid-solubilized, and an interface between the base steel and the hot-dip Al—Si-coated layer has a double-layer structured interfacial alloy layer having different hardnesses.
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公开(公告)号:US11358369B2
公开(公告)日:2022-06-14
申请号:US16957950
申请日:2018-12-21
申请人: POSCO
发明人: Hyeon-Seok Hwang , Il-Jeong Park , Myung-Soo Kim
摘要: A plating steel sheet for hot press forming includes: a base steel sheet; an Al—Zn-based plating layer formed on at least one surface of the base steel sheet; and an Fe—Al-based surface alloy layer formed between the base steel sheet and the Al—Zn-based plating layer, wherein the Al—Zn-based plating layer can include 10-30 wt % of Zn, 1 wt % or less of Fe, and the balance of Al and impurities.
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公开(公告)号:US10570493B2
公开(公告)日:2020-02-25
申请号:US15105498
申请日:2014-12-23
申请人: POSCO
发明人: Myung-Soo Kim , Hyeon-Seok Hwang
摘要: The present invention relates to: a steel sheet for hot press forming that is used for vehicle parts and the like and, more particularly, to a steel sheet for hot press forming with excellent corrosion resistance and weldability; a forming member; and a manufacturing method therefor.
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公开(公告)号:US11420419B2
公开(公告)日:2022-08-23
申请号:US16063808
申请日:2016-12-22
申请人: POSCO
发明人: Young-Ha Kim , Hyeon-Seok Hwang , Kwang-Geun Chin , Heung-Yun Kim
IPC分类号: B32B15/01 , C23C2/12 , C23C2/28 , C23C2/40 , C22C38/04 , C22C38/12 , C22C38/10 , C22C38/06 , C22C38/14 , C22C38/02 , C22C38/00 , C21D6/00 , C23C2/02 , C21D9/46 , C22C21/00 , C22C21/02 , C22C38/18 , C22C38/60 , C22C38/24 , C22C38/46 , C22C38/48 , C22C21/06 , C22C38/22 , B32B15/04 , C22C38/50 , C22C21/04 , C23C28/02 , B32B15/18 , C22C38/28 , C22C38/44 , C23C30/00 , C22C38/26
摘要: Provided are an austenite-based molten aluminum-plated steel sheet comprising: a steel plate which contains, by weight %, 0.3 to 0.9% of C, 12 to 25% of Mn, 0.5 to 2.5% of Si, 0.3 to 3.0% of Al, 0.01 to 0.5% of Ti, 0.05 to 0.5% of V, 0.01-0.5% of Mo, 0.01-0.2% of Sn, 0.001-0.1% of Co, and 0.001-0.1% of W, the remainder being Fe and unavoidable impurities; and a molten aluminum-based plated layer formed on a surface of the steel plate, and a method for producing the same.
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公开(公告)号:US10982309B2
公开(公告)日:2021-04-20
申请号:US16327426
申请日:2017-08-22
申请人: POSCO
发明人: Sang-Heon Kim , Hyeon-Seok Hwang , Suk-Kyu Lee , Sun-Ho Jeon , Yon-Kyun Song , Bong-Hwan Yoo
IPC分类号: C23C2/28 , C23C2/02 , C23C2/06 , C23C2/40 , C23C2/26 , C22C18/00 , C21D9/46 , C22C18/04 , C23C2/20
摘要: Disclosed are a hot-rolled galvanized steel sheet having excellent galling resistance and formability, and a method for manufacturing the same. The hot-rolled galvanized steel sheet, includes: a base steel; and a hot-rolled galvanizing layer formed on the surface of the base steel, wherein the hot-rolled galvanizing layer provides a hot-rolled galvanized steel sheet having a Mn crystallite having a size of 10 μm or less between the resin dendrites of zinc that form sequins.
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公开(公告)号:US10968506B2
公开(公告)日:2021-04-06
申请号:US16064735
申请日:2016-12-23
申请人: POSCO
发明人: Heung-Yun Kim , Hyeon-Seok Hwang , Young-Ha Kim
IPC分类号: C23C2/12 , C23C2/40 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/00 , C22C38/38 , C23C2/28 , C22C38/14 , C22C38/12 , B32B15/01 , C22C38/22 , C22C38/24 , C22C38/26 , C22C38/28 , C22C38/32
摘要: Provided is a high-manganese hot-dip aluminum-coated steel sheet comprising: a base steel sheet containing, by weight, 5% to 35% of Mn, 0.3 to 6% of Al, 0.1 to 1.2% of Si, the balanced amount of Fe, and inevitable impurities; a hot-dip aluminum-coated layer, formed on a surface of the base steel sheet, containing, by weight, 3 to 12% of Si and the balanced amount of Al, and inevitable impurities; and an alloy layer, 0.1 to 10 μm in thickness with a Fe—Al—Si—Mn-based alloy phase on an interface between the base steel sheet and the hot-dip aluminum-coated layer, containing, by weight, 40 to 70% of Al, 2 to 13% of Si, 3 to 9% of Mn, the balance amount of Fe, and inevitable impurities.
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公开(公告)号:US11584973B2
公开(公告)日:2023-02-21
申请号:US16642630
申请日:2018-09-13
申请人: POSCO
发明人: Doo-Jin Paik , Seul-Ki Park , Chung-Won Kim , Jung-Ki Kim , Sung-Il Kim , Hyeon-Seok Hwang , Je-Woong Lee , Jeong-Eun Kim , Cho-Rong Hong
IPC分类号: C23C2/02 , C23C2/06 , C23C2/12 , C23C2/40 , C23C16/06 , B32B15/01 , C22C38/14 , C22C38/12 , C22C38/06 , C22C38/04 , C22C38/02 , C22C38/00 , C21D6/00 , C21D8/02 , C21D9/46 , C21D1/26 , C25D3/22 , C25D3/44 , C25D5/36 , C25D7/06 , C23C30/00 , B32B15/18 , B32B15/04
摘要: Provided is a steel sheet having excellent image clarity after painting, including: carbon (C): 0.001% to 0.03%, silicon (Si): 0.001% to 0.35%, manganese (Mn): 0.05% to 2.2%, phosphorus (P): 0.003% to 0.1%, sulfur (S): 0.001% or 0.025%, aluminum (Al): 0.01% to 0.1%, nitrogen (N): 0.001% to 0.007%, and a remainder of iron (Fe) and inevitable impurities. The microstructure of the steel sheet mainly is ferrite phases. An R-cube texture of a surface layer of the steel sheet is 5% or less by area %.
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公开(公告)号:US20230012544A1
公开(公告)日:2023-01-19
申请号:US17784729
申请日:2020-12-18
申请人: POSCO
发明人: Suk-Kyu Lee , Hyeon-Seok Hwang , Myung-Soo Kim
IPC分类号: B32B15/01 , C22C38/14 , C22C38/04 , C22C38/02 , C22C21/02 , C22C21/10 , C23C2/12 , C23C2/28 , C23C2/40
摘要: The present disclosure relates to an aluminum alloy-plated steel sheet having excellent workability and corrosion resistance and a method for manufacturing the same, and more particularly, to an aluminum alloy-plated steel sheet preventing microcracks generated during hot forming and has excellent seizure resistance and corrosion resistance, and a method for manufacturing the same.
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公开(公告)号:US20220372608A1
公开(公告)日:2022-11-24
申请号:US17765306
申请日:2020-12-11
申请人: POSCO
发明人: Hyeon-Seok Hwang , Suk-Kyu Lee , Jong-Gi Oh , Kwang-Tai Min , Dong-Seok Shin
摘要: Embodiments of the present disclosure provides an aluminum alloy-plated steel sheet having high surface quality and weldability, a hot-formed member, and methods for manufacturing the aluminum alloy-plated steel sheet and the hot-formed member. The aluminum alloy-plated steel sheet includes: a base steel sheet; and an aluminum alloy plating layer formed on the base steel sheet, wherein the aluminum alloy plating layer includes, by weight %, Zn: 21% to 35%, Si: 1% to 6.9%, Fe: 2% to 12%, and the balance of Al and inevitable impurities.
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10.
公开(公告)号:US11338551B2
公开(公告)日:2022-05-24
申请号:US16957222
申请日:2018-12-20
申请人: POSCO
发明人: Hyeon-Seok Hwang , Sang-Heon Kim
IPC分类号: B32B15/01 , C22C18/00 , C23C2/06 , C23C2/26 , C23C2/40 , C22C18/04 , C23C28/02 , C23C30/00 , B32B15/04 , C23C2/04 , B32B15/18 , C23C2/28 , C23C2/02
摘要: Provided is a hot-dip galvanized steel sheet having excellent low-temperature adhesion and workability, and a manufacturing method therefor, the hot-dip galvanized steel sheet comprising: an inhibition layer formed on a base steel sheet and comprising an Fe—Al-based intermetallic alloy phase; a hot-dip galvanized layer formed on the inhibition layer; and an Al—Mn-based alloy phase discontinuously formed between the inhibition layer and the hot-dip galvanized layer.
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