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1. 发明公开

EP3617349A1 STEEL SHEET FOR CANS, AND PRODUCTION METHOD THEREFOR 审中-实审
公开(公告)号：EP3617349A1
公开(公告)日：2020-03-04
申请号：EP18813902.6
申请日：2018-06-05
申请人： JFE Steel Corporation
发明人： NAKAGAWA Yusuke , SUZUKI Takeshi , SUTO Mikito , KOJIMA Katsumi , BABA Yuya , SOU Hanyou , YAMANAKA Yoichiro , TOKUI Shunsuke
IPC分类号： C25D5/16 , C23C28/00 , C25D5/18 , C25D5/26 , C25D7/00 , C25D11/38
摘要： Provided are: a steel sheet for cans which exhibits excellent weldability; and a production method therefor. This steel sheet for cans has, provided to the surface of a steel sheet in order from the steel sheet side, a chromium metal layer and a hydrous chromium oxide layer. The deposited amount of the chromium metal layer is 65-200 mg/m 2 . The deposited amount of the hydrous chromium oxide layer in terms of chromium is 3-30 mg/m 2 . The chromium metal layer includes: a base part having a thickness of 7.0 nm or higher; and granular protrusions which are provided on the base part, have a maximum grain size of 100 nm or lower, and have a number density per unit area of at least 200 per µm 2 .

2. 发明授权

EP3388549B1 STEEL SHEET FOR CANS AND PRODUCTION METHOD FOR STEEL SHEET FOR CANS 有权
公开(公告)号：EP3388549B1
公开(公告)日：2020-11-25
申请号：EP16872892.1
申请日：2016-12-01
申请人： JFE Steel Corporation
发明人： NAKAGAWA Yusuke , SUZUKI Takeshi , SUTO Mikito , KOJIMA Katsumi , BABA Yuya
IPC分类号： C25D5/16 , C25D9/10 , C25F3/08 , C25D3/08 , C25D5/12 , C25D7/04 , C25D9/06 , C23C28/00

3. 发明授权

EP3388548B1 STEEL SHEET FOR CANS AND PRODUCTION METHOD FOR STEEL SHEET FOR CANS 有权
公开(公告)号：EP3388548B1
公开(公告)日：2020-11-25
申请号：EP16872889.7
申请日：2016-12-01
申请人： JFE Steel Corporation
发明人： NAKAGAWA Yusuke , SUZUKI Takeshi , SUTO Mikito , KOJIMA Katsumi , BABA Yuya
IPC分类号： C23C28/00 , C25D11/38 , C25F3/08 , C25D3/04 , C25D7/06

4. 发明公开

EP3388549A1 STEEL SHEET FOR CANS AND PRODUCTION METHOD FOR STEEL SHEET FOR CANS 有权
公开(公告)号：EP3388549A1
公开(公告)日：2018-10-17
申请号：EP16872892.1
申请日：2016-12-01
申请人： JFE Steel Corporation
发明人： NAKAGAWA Yusuke , SUZUKI Takeshi , SUTO Mikito , KOJIMA Katsumi , BABA Yuya
IPC分类号： C23C28/00 , C25D5/16 , C25D5/26 , C25D9/10 , C25D11/38 , C25D21/12 , C25F3/08
CPC分类号： C25D3/04 , C23C28/32 , C23C28/322 , C23C28/345 , C25D3/08 , C25D5/12 , C25D5/14 , C25D5/16 , C25D7/04 , C25D9/06 , C25D9/10 , C25D11/38 , C25D13/02 , C25D13/14 , C25D21/12 , C25F3/08
摘要： Provided is a steel sheet for cans that has an excellent surface appearance. Also provided is a production method for the steel sheet for cans. The steel sheet for cans has, on the surface thereof, in order from the steel sheet side, a chromium metal layer and a hydrous chromium oxide layer. The chromium metal layer is deposited in an amount of 65-200 mg/m 2 , and the hydrous chromium oxide layer is deposited in an amount of 3-15 mg/m 2 in terms of chromium. The chromium metal layer includes: a flat chromium metal layer that has a thickness of at least 7 nm; and a granular chromium metal layer that includes granular protrusions that are formed on the surface of the flat chromium metal layer. The maximum grain size of the granular protrusions is 100 nm or smaller. The number density of the granular protrusions per unit area is 10/µm 2 or higher.

5. 发明公开

EP3388548A1 STEEL SHEET FOR CANS AND PRODUCTION METHOD FOR STEEL SHEET FOR CANS 有权
公开(公告)号：EP3388548A1
公开(公告)日：2018-10-17
申请号：EP16872889.7
申请日：2016-12-01
申请人： JFE Steel Corporation
发明人： NAKAGAWA Yusuke , SUZUKI Takeshi , SUTO Mikito , KOJIMA Katsumi , BABA Yuya
IPC分类号： C23C28/00 , C25D5/16 , C25D5/26 , C25D9/10 , C25D11/38 , C25D21/12 , C25F3/08
CPC分类号： C25D5/14 , C23C28/322 , C23C28/3455 , C25D3/04 , C25D5/16 , C25D7/0614 , C25D11/38 , C25F3/08
摘要： Provided is steel sheet for cans that has excellent weldability and an excellent surface appearance. Also provided is a production method for the steel sheet for cans. The steel sheet for cans has, on the surface thereof, in order from the steel sheet side, a chromium metal layer and a hydrous chromium oxide layer. The chromium metal layer is deposited in an amount of 50-200 mg/m 2 , and the hydrous chromium oxide layer is deposited in an amount of 3-15 mg/m 2 in terms of chromium. The chromium metal layer includes: a flat chromium metal layer that has a thickness of at least 7 nm; and a granular chromium metal layer that includes granular protrusions that are formed on the surface of the flat chromium metal layer. The maximum grain size of the granular protrusions is 150 nm or smaller. The number density of the granular protrusions per unit area is 10/µm 2 or higher.

6. 发明公开

EP3859025A1 ROLL OUTER LAYER MATERIAL TO BE HOT-ROLLED, AND COMPOSITE ROLL TO BE HOT-ROLLED 有权
公开(公告)号：EP3859025A1
公开(公告)日：2021-08-04
申请号：EP19889262.2
申请日：2019-11-08
申请人： JFE Steel Corporation
发明人： IWATA Naomichi , SUZUKI Takeshi , MASUMITSU Tomohisa
IPC分类号： C22C37/00 , B21B27/00 , B22D13/02 , C21D5/00
摘要： To provide a composite hot-rolling roll and an outer layer material for a hot-rolling roll that have a wear resistance and fatigue resistance comparable to or higher than those of the related art and in which porosities and shrinkage cavities are reduced.
An outer layer material for a hot-rolling roll, the outer layer material having a chemical composition that contains, in mass%, C: 1.6 to 2.5%, Si: 0.2 to 1.5%, Mn: 0.2 to 1.6%, Cr: 4.5 to 7.0%, Mo: 1.0 to 5.0%, V: 4.0 to 6.0%, and Nb: 0.5 to 2.5%, in which a sum of contents of N and O of the chemical composition is 100 to 400 mass ppm, and a balance of the chemical composition is Fe and incidental impurities.

7. 发明公开

EP3620553A1 STEEL SHEET FOR CANS, AND PRODUCTION METHOD THEREFOR 有权转让
公开(公告)号：EP3620553A1
公开(公告)日：2020-03-11
申请号：EP18812947.2
申请日：2018-06-05
申请人： JFE Steel Corporation
发明人： NAKAGAWA Yusuke , SUZUKI Takeshi , SUTO Mikito , KOJIMA Katsumi , BABA Yuya , SOU Hanyou , YAMANAKA Yoichiro , TOKUI Shunsuke
IPC分类号： C25D5/16 , C23C28/00 , C25D5/18 , C25D5/26 , C25D7/00 , C25D11/38
摘要： Provided are: a steel sheet for cans which exhibits excellent weldability; and a production method therefore. This steel sheet for cans has, provided to the surface of a steel sheet in order from the steel sheet side, a chromium metal layer and a hydrous chromium oxide layer. The deposited amount of the chromium metal layer is 50-200 mg/m 2 . The deposited amount of the hydrous chromium oxide layer in terms of chromium is 3-30 mg/m 2 . The chromium metal layer includes: a base part having a thickness of 7.0 nm or higher; and granular protrusions which are provided on the base part, have a maximum grain size of 200 nm or lower, and have a number density per unit area of at least 30 per µm 2 .

8. 发明公开

EP3488942A1 ROLL OUTER LAYER MATERIAL FOR ROLLING, AND COMPOSITE ROLL FOR ROLLING 审中-公开
公开(公告)号：EP3488942A1
公开(公告)日：2019-05-29
申请号：EP17846538.1
申请日：2017-08-30
申请人： JFE Steel Corporation
发明人： ICHINO Kenji , SUZUKI Takeshi , IWATA Naomichi , MOCHIDA Tetsuo , ISHIDA Kiyohito , OHNUMA Ikuo
IPC分类号： B21B27/00 , B22D13/02 , C22C27/04 , C22C30/00 , C22F1/00 , C22F1/18
摘要： Provided are an outer layer material for rolls and a composite roll for rolling that have significantly improved wear resistance. The outer layer material for rolls has a graded composition in which the content of W decreases in a radial direction from an outer circumferential side of a roll toward an inner circumferential side of the roll. A surface of the outer layer material that is located at a position corresponding to a maximum diameter during use for rolling has a W-Co-based alloy composition containing, in mass %, W: 25 to 70% and Co: 5 to 45% and further containing C: 0.6 to 3.5%, Si: 0.05 to 3%, Mn: 0.05 to 3%, and Mo: 1 to 15%, with the balance being unavoidable impurities. Preferably, the outer layer material for rolls is formed by centrifugal casting. This outer layer material has significantly improved wear resistance as compared with high-speed tool steel rolling mill rolls. The composition may further contain, in mass %, one or two or more selected from Fe: 5 to 40%, Cr: 0.1 to 10%, V: 0.1 to 6%, and Nb: 0.1 to 3% and/or Ni: 0.05 to 3%. Preferably, the outer layer material having the above-described composition is used for an outer layer used for a roll. Preferably, the outer layer is integrally fused to an inner layer to prepare a composite roll for rolling. Alternatively, preferably, the outer layer is integrally fused to an intermediate layer, and the intermediate layer is integrally fused to the inner layer to prepare a composite roll for rolling. Also provided is an outer layer material for rolls having significantly improved wear resistance and a significantly higher Young's modulus as compared with those of conventional outer layer materials and having a good rolling load reduction effect. Also provided is a composite roll for rolling using this outer layer material. The outer layer material has a graded composition in which the content of W decreases in a radial direction from an outer circumferential side of the roll toward an inner circumferential side of the roll. The material of the outer layer material in a surface layer at a position corresponding to a maximum diameter during use for rolling has a composition containing, in mass %, W: 25 to 70%, Co: 5 to 45%, C: 0.6 to 3.5%, Si: 0.05 to 3%, Mn: 0.05 to 3%, and Mo: 1 to 15%, with the balance being unavoidable impurities. The contents of W, Co, Mo, and Fe satisfy the following formula [1]: 1.2 ≤ % W + % Mo / % Co + % Fe ≤ 9.0 where %W, %Mo, %Co, and %Fe are the contents (% by mass) of respective elements. The Young's modulus of the outer layer material for rolls is from 270 GPa to 500 GPa inclusive.

9. 发明公开

EP3479915A1 ROLL OUTER LAYER MATERIAL FOR HOT ROLLING AND COMPOSITE ROLL FOR HOT ROLLING 有权
公开(公告)号：EP3479915A1
公开(公告)日：2019-05-08
申请号：EP17848389.7
申请日：2017-06-28
申请人： JFE Steel Corporation
发明人： IWATA Naomichi , SUZUKI Takeshi , MATSUMURA Shoichi
IPC分类号： B21B27/00 , B22D13/02 , C21D5/00 , C21D9/38 , C22C37/00
摘要： An object is to provide an outer layer material of a hot rolling mill roll and a composite roll for hot rolling that have decreased pit defects on a roll surface and excellent resistance to surface roughening while ensuring wear resistance.
An outer layer material of a hot rolling mill roll, has a composition containing, in mass%, C: 2.0 to 3.0%, Si: 0.2 to 1.0%, Mn: 0.2 to 1.0%, Cr: 4.0 to 7.0%, Mo: 3.0 to 6.5%, V: 5.0 to 7.5%, Nb: 0.5 to 3.0%, Ni: 0.05 to 3.0%, Co: 0.2 to 5.0%, and W: 0.5 to 5.0%, with the balance being Fe and incidental impurities, and the contents of C, Cr, Mo, V, Nb, Ni, and W satisfying the following expression (1); has 85% or more of a matrix microstructure being a tempered martensite and/or a bainite microstructure; and has a minor axis of tempered martensite or bainite of 0.5 to 3.0 µm; 0.05 ≤ % C − % V × 0.177 − % Nb × 0.129 − % Cr × 0.099 − % Mo × 0.063 − % W × 0.033 + % Ni ≤ 4.0 where %C, %V, %Nb, %Cr, %Mo, %W, and %Ni each represent the respective content of each respective element (mass%).

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