公开(公告)号：EP0450678A3

公开(公告)日：1992-04-15

申请号：EP91200460.3

申请日：1991-03-04

申请人： GENERAL MOTORS CORPORATION

发明人： Sigler, David R.

IPC分类号： C21C7/04 ,  C22C38/18 ,  C23C8/14

CPC分类号： C23C8/10 ,  C21C7/04

摘要： A method for producing aluminium-containing ferritic stainless steel from a magnesium-contaminated melt is disclosed, such that the steel is suitable for growing oxide whiskers on a surface thereof, so as to cover said surface. The method comprises adding sulphur to the contaminated melt in an amount sufficient to increase the sulphur content to not less than 1.3 times the magnesium content, whereupon the sulphur reacts with the magnesium to render the magnesium inert and thus prevent it from inhibiting oxide whisker growth. The method also preferably comprises an addition of titanium, zirconium or hafnium in amounts sufficient to react with any residual sulphur present in the melt in excess of the amount required for complete stoichiometric reaction with the magnesium present in the melt, thereby mitigating the adverse effect of free sulphur in the steel on oxide adhesion to the steel.

公开(公告)号：EP0296352A2

公开(公告)日：1988-12-28

申请号：EP88107843.0

申请日：1988-05-16

申请人： INLAND STEEL COMPANY

发明人： Moscoe, Gerald F. ,  Mastervich, Joel Charles ,  Kreevich, William J. ,  Knoepke, John R. ,  Rellis, Daniel, Jr. ,  Glennon, Roger J. ,  Pielet, Howard M.

IPC分类号： B22D11/10

CPC分类号： C21C7/04 ,  B22D11/10 ,  B22D11/118

摘要： A tundish and associated assembly are employed for the continuous casting of molten steel containing lead. Undissolved lead can accumulate at the bottom of the tundish, work its way through the refractory material (15) lining the tundish interior bottom and weep through the metal tundish shell bottom (11) into a casting mold (22) located below the tundish, which is undesirable. Expendients are provided to minimize such lead weeping.

摘要翻译： 中间包和相关联的组件用于连续铸造含铅钢水。 未溶解的铅可以积聚在中间包的底部，穿过中间包内部底部的耐火材料（15），并通过金属中间罐壳底（11）渗入位于中间包下方的铸模（22）中， 是不合需要的 提供消费者以尽量减少这种铅泄漏。

公开(公告)号：EP3282028A1

公开(公告)日：2018-02-14

申请号：EP16776617.9

申请日：2016-04-07

申请人： Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)

发明人： TASHIRO, Kiichiro ,  SATO, Shinsuke ,  KAWANO, Haruya

IPC分类号： C22C38/00 ,  C22C38/14 ,  C22C38/58 ,  C21C7/04 ,  C21D8/02

CPC分类号： C22C38/00 ,  C21C7/0006 ,  C21C7/04 ,  C21D8/02 ,  C21D8/0226 ,  C21D9/46 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/20 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/42 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/58

摘要： To provide a high strength line pipe that is excellent in the low temperature toughness, particularly, in both the CTOD properties and DWTT properties. The steel sheet contains oxide particles with a circle equivalent diameter of 2 µm or more at a density of 10 particles/mm 2 or less in a t/2 position where t is a sheet thickness of the steel sheet, and the steel sheet satisfies that in the t/2 position, an average circle equivalent diameter of crystal grains enclosed by high angle grain boundaries in each of which a misorientation between two adjacent crystals is 15° or more is 10 µm or less, and that in the t/2 position, a fraction of a hard phase is 5 area% or less, while a separation index SI measured from a fracture surface of a Charpy impact test specimen of the steel sheet at a specific temperature is 0.15 mm/mm 2 or less.

摘要翻译： 提供低温韧性特别是CTOD特性和DWTT特性优异的高强度管线管。 在t为钢板的板厚的at / 2位置，钢板以10个/ mm 2以下的密度含有等效圆直径为2μm以上的氧化物粒子，钢板满足 t / 2位置，相邻的2个晶体的取向差为15°以上的大角晶界包围的晶粒的平均当量圆直径为10μm以下，t / 2位置为a 钢板的却贝冲击试验片的断裂面在特定温度下测定的分离指数SI为0.15mm / mm 2以下，硬质相的分率为5面积％以下。

公开(公告)号：EP3243921A4

公开(公告)日：2018-01-10

申请号：EP15876961

申请日：2015-11-17

申请人： JFE STEEL CORP

发明人： NAKANISHI TADASHI ,  NAKAJIMA HIROAKI ,  OKUBO TOMOYUKI ,  ODA YOSHIHIKO

IPC分类号： C22C38/00 ,  C21C7/00 ,  C21C7/04 ,  C21D8/12 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/16 ,  C22C38/18 ,  C22C38/60 ,  H01F1/16 ,  H01F1/18

CPC分类号： C22C38/002 ,  C21C7/00 ,  C21C7/04 ,  C21D8/1205 ,  C21D8/1222 ,  C21D8/1233 ,  C21D8/1272 ,  C22C38/00 ,  C22C38/001 ,  C22C38/004 ,  C22C38/005 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/16 ,  C22C38/18 ,  C22C38/60 ,  H01F1/16 ,  H01F1/18 ,  H01F1/342 ,  Y02P10/212

摘要： When a non-oriented electrical steel sheet is produced by hot rolling a slab containing, by mass%, C: not more than 0.0050%, Si: 1.5-5.0%, Mn: 0.20-3.0%, sol. Al: not more than 0.0050%, P: not more than 0.2%, S: not more than 0.0050% and N: not more than 0.0040% to form a hot rolled sheet, cold rolling the hot rolled sheet without conducting a hot band annealing and then subjecting to a finish annealing, a compositional ratio of CaO in oxide-based inclusions existing in the slab defined by CaO/ (SiO 2 + Al 2 O 3 + CaO) is set to not less than 0.4 and/or a compositional ratio of Al 2 O 3 defined by Al 2 O 3 / (SiO 2 + Al 2 O 3 + CaO) is set to not less than 0.3, and a coiling temperature in the hot rolling is set to not lower than 650 °C, whereby the non-oriented electrical steel sheet having an excellent recyclability, a high magnetic flux density and a low iron loss is obtained.

公开(公告)号：EP2252712B1

公开(公告)日：2017-11-29

申请号：EP09721360.7

申请日：2009-03-03

申请人： AFFIVAL

发明人： POULALION, André ,  GERARDIN, Sébastien

IPC分类号： C21C7/00 ,  C21C7/04

CPC分类号： C21C7/0056 ,  C21C7/04

公开(公告)号：EP3239319A1

公开(公告)日：2017-11-01

申请号：EP15873094.5

申请日：2015-12-22

申请人： Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)

发明人： TASHIRO, Kiichiro ,  KATO, Taku ,  OKA, Yuichi ,  SATO, Shinsuke ,  KAWANO, Haruya ,  MIYAKE, Takashi ,  KIMURA, Sei

IPC分类号： C22C38/00 ,  C22C38/14 ,  C22C38/58 ,  C21C7/04 ,  C21D8/02

CPC分类号： C22C38/58 ,  C21C7/04 ,  C21D1/18 ,  C21D8/02 ,  C21D8/0226 ,  C21D8/0263 ,  C21D8/105 ,  C21D9/08 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16

摘要： A steel plate and a steel pipe with excellent hydrogen-induced cracking resistance are achieved. Further, the steel plate and steel pipe are achieved that can evaluate the hydrogen-induced cracking resistance based on the quality of an internal structure of a cast strip without executing a hydrogen-induced cracking test after rolling. The steel plate having the excellent hydrogen-induced cracking resistance satisfies the specified contents of C, Si, Mn, P, S, Al, Ca, N, and O, and further contains the specified content of one or more elements selected from the group consisting of REM and Zr, with the balance being iron and inevitable impurities. The steel plate is further characterized by that the ratio (Ca/S) of the Ca to the S is 2.0 or more, the Ca, the S, and the O satisfies the relationship of (Ca - 1.25S) /O ≤ 1.80, and a decrease in an amount of Ca obtained by subtracting a Ca concentration in a slab from a Ca concentration in a molten steel in a tundish is a threshold value Ca dropθ or less, the threshold value Ca dropθ being a maximum decrease in an amount of Ca that avoids the occurrence of hydrogen-induced cracking in the steel plate obtained by rolling the slab.

摘要翻译： 实现了具有优异的耐氢致开裂性的钢板和钢管。 此外，实现了能够在轧制后不进行氢致开裂试验的情况下基于铸造带材的内部结构的质量来评价耐氢致开裂性的钢板和钢管。 具有优异的耐氢致开裂性的钢板满足C，Si，Mn，P，S，Al，Ca，N和O的规定含量，并且进一步含有选自下组中的一种或多种元素的特定含量 由REM和Zr组成，余量为铁和不可避免的杂质。 所述钢板的特征还在于Ca与S的比率（Ca / S）为2.0或更高，Ca，S和O满足（Ca-1.25S）/O≤1.80的关系， 通过从中间包内的钢水中的Ca浓度减去板坯中的Ca浓度而得到的Ca量的减少量为阈值Cadropθ以下，该阈值Cadropθ是Ca量的最大减少量 避免了通过轧制板坯而获得的钢板中发生氢致开裂。

公开(公告)号：EP3135785A4

公开(公告)日：2017-09-27

申请号：EP15783239

申请日：2015-04-22

申请人： NIPPON STEEL & SUMITOMO METAL CORP

发明人： HASHIMURA MASAYUKI ,  YAMAMOTO JUNYA ,  MIZUKAMI KAZUMI ,  YOSHIDA NAOTSUGU ,  MIYAZAKI MASAFUMI ,  MIYAMOTO KENICHIRO

IPC分类号： C22C38/00 ,  B22D11/115 ,  B22D11/124 ,  C21C7/04 ,  C21C7/06 ,  C21C7/10 ,  C22C38/60

CPC分类号： C21D9/02 ,  B22D11/001 ,  B22D11/115 ,  B22D11/124 ,  C21C7/04 ,  C21C7/06 ,  C21C7/10 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/34 ,  C22C38/42 ,  C22C38/46 ,  C22C38/50 ,  C22C38/54 ,  C22C38/60

摘要： A spring steel according to the present embodiment has a chemical composition consisting of, in mass%, C: 0.4 to 0.7%, Si: 1.1 to 3.0%, Mn: 0.3 to 1.5%, P: equal to or less than 0.03%, S: equal to or less than 0.05%, Al: 0.01 to 0.05%, rare earth metal: 0.0001 to 0.002%, N: equal to or less than 0.015%, O: equal to or less than 0.0030%, Ti: 0.02 to 0.1%, and as optional elements, Ca, Cr, Mo, W, V, Nb, Ni, Cu, and B, with the balance being Fe and impurities. In the spring steel, the number of oxide inclusions having an equivalent circular diameter of equal to or greater than 5 µm is equal to or less than 0.2/mm 2 , the oxide inclusions each being one of an Al-based oxide, a complex oxide containing REM, O and Al, and a complex oxysulfide containing REM, O, S, and Al. Further, a maximum value among equivalent circular diameters of the oxide inclusions is equal to or less than 40 µm.

摘要翻译： 本实施方式的弹簧钢的成分组成以质量％计含有C：0.4〜0.7％，Si：1.1〜3.0％，Mn：0.3〜1.5％，P：0.03％ S：0.05％以下，Al：0.01〜0.05％，稀土类金属：0.0001〜0.002％，N：0.015％以下，O：0.0030％以下，Ti：0.02〜 0.1％，Ca，Cr，Mo，W，V，Nb，Ni，Cu和B作为任选元素，余量为Fe和杂质。 在弹簧钢中，当量圆直径为5μm以上的氧化物系夹杂物的个数为0.2个/ mm 2以下，氧化物系夹杂物为Al系氧化物，复合氧化物 含有REM，O和Al的复合硫氧化物，以及含有REM，O，S和Al的复合硫氧化物。 此外，氧化物夹杂物的等效圆直径中的最大值等于或小于40μm。

公开(公告)号：EP1331278B1

公开(公告)日：2016-06-08

申请号：EP01965664.4

申请日：2001-09-14

申请人： JFE Steel Corporation

发明人： NAKAI, Yoshie c/o NKK Corporation ,  MURAI, Takeshi c/o NKK Corporation ,  MATSUNO, Hidetoshi c/o NKK Corporation ,  KIKUCHI, Yoshiteru c/o NKK Corporation ,  TAKAHASHI, Kenji c/o NKK Corporation ,  NIMURA, Yoichi c/o NKK Corporation ,  SHIMIZU, Hiroshi c/o NKK Corporation ,  ISAWA, Tomoo c/o NKK Corporation ,  KAWASHIMA, Takeshi c/o Yoshizawa Lime Ind. Co.,LTD ,  OKAMURA, Tatsuya c/o Yoshizawa Lime Ind. Co.,LTD

IPC分类号： C21C1/02 ,  C21C7/06 ,  C21C7/072 ,  C21C7/076 ,  C21C7/04

CPC分类号： C21C7/076 ,  C21B3/04 ,  C21C1/025 ,  C21C7/04 ,  C21C7/06 ,  C21C7/0645 ,  C21C7/072 ,  Y02P10/216 ,  Y02P10/242 ,  Y02W30/542

公开(公告)号：EP3020833A1

公开(公告)日：2016-05-18

申请号：EP14822459.5

申请日：2014-06-04

申请人： JFE Steel Corporation

发明人： FURUMAI, Kohei ,  ARAMAKI, Norichika ,  MIKI, Yuji ,  MURAI, Takeshi ,  INOUE, Toru ,  USUI, Yukio ,  ISHIDA, Tomoharu

IPC分类号： C21C7/00 ,  C21C7/04 ,  G01N21/67

CPC分类号： C22C1/06 ,  C21C7/04 ,  C21C7/10 ,  C22C1/02 ,  G01N21/67 ,  G01N21/69 ,  G01N2021/695

摘要： A method of producing a steel material according to the present invention is characterized in that Ca is added to molten steel in an amount within the range satisfying a prescribed formula. After secondary refining, the amount of Al 2 O 3 in the molten steel may be analyzed, and then CaSi may be added to the molten steel in a ladle. The amount of Al 2 O 3 in the molten steel may be analyzed using spark discharge atomic emission spectroscopy as follows. The ratio of the intensity of light emission from aluminum to the intensity of light emission from iron is determined for each of a plurality of discharge pulses. An alumina fraction is computed using a prescribed formula, and the obtained light emission intensity ratios of the discharge pulses are arranged in ascending order. A light emission intensity ratio at a certain position equal to or lower than 30% of the total number of discharge pulses is used as a representative aluminum intensity ratio. Then an alumina intensity ratio (= the alumina fraction x the representative aluminum intensity ratio) is computed using the product of the computed alumina fraction and the representative aluminum intensity ratio, and the amount of alumina (in the steel) may computed using the relational formula between the alumina intensity ratio and the amount of alumina (in the steel) determined by chemical analysis.

摘要翻译： 根据本发明的钢材的制造方法的特征在于，在满足规定式的范围内，将Ca添加到钢水中。 在二次精炼之后，可以分析钢水中的Al 2 O 3的量，然后可以将钢水中的CaSi加入到钢水中。 可以如下使用火花放电原子发射光谱法分析钢水中的Al 2 O 3的量。 对于多个放电脉冲中的每一个确定铝的发光强度与来自铁的发光强度的比率。 使用规定的公式计算氧化铝分数，并且获得的放电脉冲的发光强度比以升序排列。 使用等于或低于放电脉冲总数的30％的特定位置处的发光强度比作为代表性的铝强度比。 然后使用计算的氧化铝分数和代表性铝强度比的乘积计算氧化铝强度比（=氧化铝分数×代表性铝强度比），并且可以使用关系式计算氧化铝（在钢中）的量 氧化铝强度比和通过化学分析确定的氧化铝（在钢中）的量。

公开(公告)号：EP1950317B1

公开(公告)日：2016-03-30

申请号：EP06823434.3

申请日：2006-11-09

申请人： Nippon Steel & Sumitomo Metal Corporation

发明人： MURAKAMI, Hidekuni c/o Nippon Steel & Sumitomo Metal Corporation Yawata Works ,  NISHIMURA, Satoshi c/o Nippon Steel & Sumitomo Metal Corporation Yawata Works

IPC分类号： C22C38/00 ,  B22D11/124 ,  C21D9/46 ,  C22C38/60 ,  C23D5/00 ,  C21C7/04 ,  C21C7/06

CPC分类号： C23D5/00 ,  B22D11/124 ,  C21C7/04 ,  C21C7/06 ,  C21D9/46 ,  C22C38/002 ,  C22C38/04 ,  C22C38/32