公开(公告)号：EP3395975A1

公开(公告)日：2018-10-31

申请号：EP16878770.3

申请日：2016-12-21

申请人： Nippon Steel & Sumitomo Metal Corporation

发明人： TERAMOTO Shinya ,  SHIGA Akira

IPC分类号： C22C38/00 ,  C22C38/60

CPC分类号： C22C38/00 ,  C22C38/60

摘要： A steel according to one aspect of the present invention contains, in unit mass%, C: 0.10% to 0.25%, Si: 0.60% to 1.20%, Mn: 0.60% to 1.00%, P: 0.040% to 0.060%, S: 0.060% to 0.100%, Cr: 0.05% to 0.20%, Bi: 0.0001% to 0.0050%, N: 0.0020% to 0.0150%, V: 0% to 0.010%, Al: 0% to 0.0050%, Ti: 0% to 0.020%, Ca: 0% to 0.005%, Zr: 0% to 0.005%, Mg: 0% to 0.005%, and a remainder including Fe and impurities.

公开(公告)号：EP3395973A1

公开(公告)日：2018-10-31

申请号：EP16878152.4

申请日：2016-10-31

申请人： Nippon Steel & Sumitomo Metal Corporation

发明人： ISHITSUKA, Tetsuo ,  TSUSUE, Takashi ,  IWAMOTO, Shuji ,  KOBAYASHI, Shunichi ,  OGATA, Toshiyuki ,  YOSHIDA, Osamu ,  KAWANO, Hideto

IPC分类号： C22C38/00 ,  B21C37/08 ,  C21D8/02 ,  C21D8/10 ,  C22C38/06 ,  C22C38/50

CPC分类号： C22C38/18 ,  B21B3/02 ,  B21C37/08 ,  B23K11/16 ,  C21D8/02 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/10 ,  C21D9/46 ,  C21D2211/005 ,  C21D2211/009 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/50 ,  E21B17/00

摘要： An as-rolled type K55 electric resistance welded oil well pipe includes, in terms of % by mass, 0.30 to 0.50% of C, 0.05 to 0.40% of Si, 0.50 to 1.20% of Mn, 0 to 0.030% of P, 0 to 0.020% of S, 0.002 to 0.080% of Al, 0 to 0.0080% of N, 0 to 0.30% of Cu, 0 to 0.30% of Ni, 0 to 0.30% of Cr, 0 to 0.10% of Mo, 0 to 0.10% of V, 0 to 0.050% of Nb, 0 to 0.030% of Ti, 0 to 0.0100% of Ca, and the balance being Fe and impurities. In the pipe, a metallographic structure at a position of 1/4 of a pipe thickness in an L cross-section at a base metal 90° position is a ferrite-pearlite structure in which prior γ-grains are flattened, includes grain boundary ferrite and intragranular ferrite, and has a rate of a total area of the grain boundary ferrite and the intragranular ferrite, of 10 to 30%.

公开(公告)号：EP3395465A1

公开(公告)日：2018-10-31

申请号：EP16879298.4

申请日：2016-12-20

申请人： Posco

发明人： SOHN, Il-Ryoung ,  HWANG, Hyeon-Seok ,  KIM, Jong-Sang

IPC分类号： B21D22/02 ,  B21D37/16 ,  C22C38/04 ,  C22C38/02 ,  C23C2/06 ,  C23C2/02 ,  C21D9/46 ,  C22C38/00 ,  C21D8/02

CPC分类号： C23C2/06 ,  B21D22/02 ,  B21D22/022 ,  B21D37/16 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0247 ,  C21D8/0278 ,  C21D9/46 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C23C2/02 ,  C23C2/28

摘要： Disclosed is a hot press formed product, which is prepared by means of hot press forming a Zn-Al-Mg plated steel material comprising base iron and a Zn-Al-Mg plated layer, and a method for preparing same, the hot press formed product comprising an oxide layer formed on the surface thereof, wherein the content ratio of Al to Mg (Al/Mg) in the oxide layer is 0.8 or higher.

公开(公告)号：EP3135787B1

公开(公告)日：2018-10-31

申请号：EP15783445.8

申请日：2015-04-24

申请人： JFE Steel Corporation

发明人： KITSUYA, Shigeki ,  ICHIMIYA, Katsuyuki ,  HASE, Kazukuni ,  ENDO, Shigeru

IPC分类号： C22C38/00 ,  B21B1/26 ,  B21B1/38 ,  B21B3/00 ,  C21D8/02 ,  C22C38/58 ,  C21D9/46 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/54 ,  B21B1/22 ,  C22C38/14 ,  C22C38/16

CPC分类号： C21D9/46 ,  B21B1/22 ,  B21B1/26 ,  B21B3/00 ,  B21B2001/225 ,  C21D8/02 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0263 ,  C21D2211/002 ,  C21D2211/008 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/14 ,  C22C38/16 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/54 ,  C22C38/58

摘要： Provided is a steel plate that has excellent strength and toughness in a mid-thickness part thereof, despite having a plate thickness of 100 mm or greater. The steel plate has a chemical composition that contains specific amounts of C, Si, Mn, P, S, Cr, Ni, Al, N, B, and O, with the balance being Fe and incidental impurities, and that has an equivalent carbon content Ceq IIW of 0.65 or greater. Furthermore, the steel plate has a yield strength of 620 MPa or greater, a plate thickness of 100 mm or greater, and has a microstructure in which prior ³ grain size in a mid-thickness part of the steel plate has a maximum value, expressed as an equivalent circle diameter, of 150 µm or less, and a total area ratio of martensite and bainite in the mid-thickness part is 80% or greater.

公开(公告)号：EP2954074B1

公开(公告)日：2018-10-31

申请号：EP14702880.7

申请日：2014-02-06

申请人： Tata Steel IJmuiden BV

发明人： RIJKENBERG, Rolf Arjan

IPC分类号： C21D8/02 ,  C22C38/00

CPC分类号： C21D8/0263 ,  B32B15/012 ,  B32B15/013 ,  C21D6/005 ,  C21D6/008 ,  C21D6/02 ,  C21D8/0226 ,  C21D9/46 ,  C21D9/52 ,  C21D2211/004 ,  C21D2211/005 ,  C22C38/00 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C23C2/02 ,  C23C2/06 ,  C23C2/12 ,  Y10T428/12757 ,  Y10T428/12799

摘要： A high-strength hot-rolled steel strip or sheet with tensile strength of 570 to 870 MPa and an excellent combination of total elongation, stretch-flange formability, as well as fatigue resistance and to a method of manufacturing the steel strip or sheet and a chassis part made thereof.

公开(公告)号：EP2799594B1

公开(公告)日：2018-10-31

申请号：EP12861651.3

申请日：2012-11-12

申请人： JFE Steel Corporation

发明人： OKUBO Tomoyuki ,  KIJIMA Gou ,  WATANABE Makoto

IPC分类号： C23C22/00 ,  C21D8/12 ,  C21D9/46 ,  C22C38/00 ,  C22C38/60 ,  C23C22/30 ,  C23C22/33 ,  C23C22/74 ,  H01F1/16

CPC分类号： H01F1/14783 ,  C04B28/34 ,  C04B28/344 ,  C04B28/346 ,  C04B2111/00525 ,  C21D6/008 ,  C21D8/12 ,  C21D8/1272 ,  C21D8/1277 ,  C21D8/1283 ,  C21D8/1288 ,  C21D9/46 ,  C21D2201/05 ,  C22C38/00 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/60 ,  C23C22/33 ,  C23C22/74 ,  C23D5/02 ,  C23D7/00 ,  H01F1/18 ,  C04B14/307 ,  C04B12/04

摘要： The purpose of the present invention is to reduce iron loss of a directional electromagnetic steel sheet which has a phosphate glass coating. A directional electromagnetic steel sheet with a coating of the present invention comprises: a directional electromagnetic steel sheet; and a coating that is formed on the surface of the directional electromagnetic steel sheet and contains elements P, Si, Cr and O as well as at least one element that is selected from the group consisting of Mg, Al, Ni, Co, Mn, Zn, Fe, Ca and Ba, with 5% by mass or more thereof being composed of a crystalline phase of a phosphate salt.

公开(公告)号：EP3392360A1

公开(公告)日：2018-10-24

申请号：EP16875206.1

申请日：2016-09-29

申请人： Hitachi Metals, Ltd.

发明人： FUKUMOTO, Shiho

IPC分类号： C22C38/00 ,  C22C38/30

CPC分类号： C21D8/005 ,  C21D6/002 ,  C21D6/005 ,  C21D6/007 ,  C21D6/008 ,  C21D6/02 ,  C21D9/22 ,  C21D9/24 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/22 ,  C22C38/24 ,  C22C38/30

摘要： Provided are: a high-speed tool steel having excellent hot workability, and excellent damage resistance when being made into various tools; a material for tools, and a method for producing a material for tools. The high-speed tool steel contains, in mass%, 0.9-1.2% of C, 0.1-1.0% of Si, 1.0% or less of Mn, 3.0-5.0% of Cr, 2.1-3.5% of W, 9.0-10.0% of Mo, 0.9-1.2% of V, 5.0-10.0% of Co, 0.020% or less of N, and the balance being Fe and impurities, wherein an M value calculated by a formula satisfies -1.5 ≤ M value ≤ 1.5. Formula: M value = -9.500 + 9.334[%C] - 0.275[%Si] - 0.566[%W] - 0.404[%Mo] + 3.980[%V] + 0.166[%Co], where the characters in brackets [] indicate the contained amounts (mass%) of the respective elements. The present invention also pertains to: a material for tools, which is obtained by using the high-speed tool steel; and a method for producing the material for tools.

公开(公告)号：EP3392355A1

公开(公告)日：2018-10-24

申请号：EP16875188.1

申请日：2016-09-20

申请人： Daido Steel Co.,Ltd.

发明人： FURUSHO Chihiro ,  TAKABAYASHI Hiroyuki

IPC分类号： C21D8/00 ,  C22C38/00 ,  C22C38/60

CPC分类号： C21D8/00 ,  C22C38/00 ,  C22C38/60

摘要： The present invention is characterized by obtaining a steel having a ferrite cross-sectional area ratio of 95% or more through hot-forging, in a ferrite single-phase region, a steel having a composition makeup containing, in mass%, 0.015% or less of C, 0.02-0.60% of Si, 0.2-2.0% of Mn, 0.050% or less of P, 1.5% or less of Cu, 1.5% or less of Ni, 10.0-25.0% of Cr, 2.0% or less of Mo, 0.30-2.50% of Al, 0.0030-0.0400% of O, 0.035% or less of N, and 0.10-0.45% of S, and in addition, two or more selected from 0.03-0.40% of Pb, 0.03-0.40% of Bi, and 0.01-0.10% of Te, the balance being Fe and incidental impurities, where the masses by percent of the respective elements of C, N, Si, Cr, Mo, and Al, satisfy a predetermined relationship.

公开(公告)号：EP3388541A1

公开(公告)日：2018-10-17

申请号：EP17744282.9

申请日：2017-01-26

申请人： JFE Steel Corporation

发明人： HASEGAWA Hiroshi ,  FUNAKAWA Yoshimasa

IPC分类号： C22C38/00 ,  C21D9/46 ,  C22C18/00 ,  C22C38/06 ,  C22C38/60 ,  C22C18/04 ,  C21D6/00 ,  C21D8/02 ,  C21D8/04 ,  C22C38/02 ,  C22C38/04 ,  C22C38/16 ,  C22C38/08

CPC分类号： C21D9/46 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0247 ,  C21D8/0263 ,  C21D8/0447 ,  C21D8/0463 ,  C21D2211/001 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/00 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/16 ,  C22C38/60

摘要： Provided are a warm-workable high-strength steel sheet having superior warm workability and residual ductility after warm working, and a method for manufacturing such steel sheets.
The warm-workable high-strength steel sheet has a chemical composition including, in mass%, C: 0.05 to 0.20%, Si: not more than 3.0%, Mn: 3.5 to 8.0%, P: not more than 0.100%, S: not more than 0.02%, Al: 0.01 to 3.0% and N: not more than 0.010%, the balance being Fe and inevitable impurities. The steel sheet has a microstructure which includes, in area fractions, 10 to 60% retained austenite, 10 to 80% ferrite, 5 to 50% martensite and 0 to 5% bainite, the C content in the retained austenite being less than 0.40 mass%. The manufacturing method yields such steel sheets.

公开(公告)号：EP3386746A1

公开(公告)日：2018-10-17

申请号：EP16828815.7

申请日：2016-12-09

申请人： Ak Steel Properties, Inc.

发明人： COMSTOCK, Robert, James ,  ALDER, Jeffrey, Douglas

IPC分类号： B32B15/01 ,  B32B7/00 ,  B32B7/12 ,  B32B15/00 ,  B32B15/08 ,  B32B15/20 ,  B62D29/00 ,  C22C1/00 ,  C22C23/00

CPC分类号： B29C65/48 ,  B23K31/02 ,  B23K2103/05 ,  B23K2103/172 ,  B23K2103/42 ,  B23K2103/54 ,  B29C65/02 ,  B29L2009/00 ,  B32B7/00 ,  B32B7/12 ,  B32B15/00 ,  B32B15/01 ,  B32B15/08 ,  B32B15/20 ,  B32B2250/00 ,  B32B2250/40 ,  C22C1/00 ,  C22C1/02 ,  C22C21/00 ,  C22C23/00 ,  C22C38/00

摘要： To improve the stiffness of a thin single layer or mono-sheet of steel, a composite steel comprising at least two outer steel layers separated with a spacer. Spacer materials can include any metal less dense than steel, or a polymer or resin, optionally comprising a carbon or glass fiber, or Kevlar material. Such a composite steel can yield a higher stiffness than a mono-sheet of steel having the same total sheet thickness. For instance, moving the steel material away from the neutral axis with the spacer can increase the strain on bending to provide a high strength composite steel that maintains stiffness while also providing desirable weight savings.