公开(公告)号：EP2806051A1

公开(公告)日：2014-11-26

申请号：EP13738039.0

申请日：2013-01-16

申请人： JFE Steel Corporation

发明人： MASUOKA, Hiroyuki ,  ANDO, Satoru ,  AIZAWA, Shigeyuki ,  NAKAZATO, Kazuki ,  TAIRA, Shoichiro

IPC分类号： C23G1/08 ,  C22C38/00 ,  C22C38/06

CPC分类号： C23G1/08 ,  C21D8/02 ,  C21D8/0278 ,  C21D9/562 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C23G1/00 ,  C23G1/081 ,  C23G1/085 ,  C23G1/086

摘要： In a method for prevention of yellowing on a surface of a steel sheet subjected to re-pickling, washing with water and drying after a surface of a continuously annealed steel sheet is pickled to remove Si-containing oxide layer from a surface layer of the steel sheet, the surface of the steel sheet is held at a wet state between the pickling and the re-pickling and between the re-pickling and the washing, and more preferably the washing is carried out with water having an iron ion concentration decreased to not more than 20 g/L, whereby the yellowing on the surface of the steel sheet after the pickling is prevented. Thus, cold rolled steel sheets being excellent in not only the appearance quality but also the phosphatability and corrosion resistance after painting are manufactured stably.

摘要翻译： 在经过再酸化的钢板表面防止黄化的方法中，用连续退火钢板的表面酸洗后，用水洗涤并干燥，从钢的表面层除去含Si氧化物层 钢板的表面在酸洗和再酸洗之间以及再次酸洗和洗涤之间处于湿润状态，更优选地，用铁离子浓度降低至不是的水进行洗涤 大于20g / L，从而防止酸洗后钢板表面发黄。 因此，不仅稳定地制造在外观品质上优异且涂装后的耐磷化性和耐腐蚀性优异的冷轧钢板。

公开(公告)号：EP2824210A1

公开(公告)日：2015-01-14

申请号：EP13758658.2

申请日：2013-02-28

申请人： JFE Steel Corporation

发明人： KAWABE, Hidetaka ,  YOKOTA, Takeshi ,  SUGIHARA, Reiko ,  AIZAWA, Shigeyuki ,  NAKAZATO, Kazuki

IPC分类号： C22C38/00 ,  C21D9/46 ,  C22C38/14

CPC分类号： C21D8/0263 ,  C21D1/25 ,  C21D1/26 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0278 ,  C21D8/0436 ,  C21D8/0473 ,  C21D9/48 ,  C21D2211/001 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/14

摘要： An object of the present invention is to provide a high-strength cold-rolled steel sheet having a tensile strength TS of 1180 MPa or more obtained by preparing metallographic structure in a component system free of expensive alloy elements, thereby improving elongation, stretch flangeability, and bending properties of the steel sheet. In order to achieve the object, the steel sheet of the present invention has a specific chemical composition, and a microstructure including ferrite phase: 40 % to 60 %, bainite phase: 10 % to 30 %, tempered martensite phase: 20 % to 40 %, and retained austenite phase: 5 % to 20 % by volume fraction, and satisfying a condition that a ratio of tempered martensite phase having major axis length ≤ 5 µm to a total volume fraction of the tempered martensite phase is 80 % to 100 %.

摘要翻译： 本发明的目的在于提供一种高强度冷轧钢板，其通过在没有昂贵的合金元素的成分体系中制作金相组织而得到的拉伸强度TS为1180MPa以上的高强度冷轧钢板，由此提高伸长率，延伸凸缘性， 和钢板的弯曲性能。 为了实现上述目的，本发明的钢板具有特定的化学组成，并且含有铁素体相：40〜60％，贝氏体相：10〜30％，回火马氏体相：20〜40％ ％，残留奥氏体相：5〜20体积％，并满足长轴长度≤5μm的回火马氏体相与回火马氏体相的总体积率之比为80％〜100％的条件， 。

公开(公告)号：EP2824210B1

公开(公告)日：2016-10-05

申请号：EP13758658.2

申请日：2013-02-28

申请人： JFE Steel Corporation

发明人： KAWABE, Hidetaka ,  YOKOTA, Takeshi ,  SUGIHARA, Reiko ,  AIZAWA, Shigeyuki ,  NAKAZATO, Kazuki

IPC分类号： C22C38/00 ,  C22C38/14 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C21D9/48 ,  C21D8/04 ,  C21D1/25 ,  C21D1/26 ,  C21D8/02 ,  C21D9/46

CPC分类号： C21D8/0263 ,  C21D1/25 ,  C21D1/26 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0278 ,  C21D8/0436 ,  C21D8/0473 ,  C21D9/48 ,  C21D2211/001 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/14

公开(公告)号：EP2653572B1

公开(公告)日：2016-08-10

申请号：EP11848237.1

申请日：2011-12-13

申请人： JFE Steel Corporation

发明人： TAKAHASHI, Hideyuki ,  SATO, Nobuyuki ,  NAKAZATO, Kazuki ,  IRI, Masato

IPC分类号： C21D9/56 ,  C21D1/74 ,  C21D1/76 ,  C23C2/02 ,  C23C2/06 ,  C23C2/28 ,  C23C2/40 ,  F27D7/06 ,  F27B9/28 ,  F27D7/04

CPC分类号： C23C2/02 ,  B32B15/013 ,  C21D1/74 ,  C21D1/76 ,  C21D9/56 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C23C2/28 ,  F27B9/28 ,  F27D7/06

公开(公告)号：EP2927342A1

公开(公告)日：2015-10-07

申请号：EP12889434.2

申请日：2012-12-04

申请人： JFE Steel Corporation

发明人： SATO, Nobuyuki ,  NAKAZATO, Kazuki ,  FUJII, Takamasa

IPC分类号： C23C2/02 ,  C21D1/76 ,  C21D9/56 ,  C23C2/06

CPC分类号： C21D9/561 ,  C21D1/76 ,  C21D9/573 ,  C21D9/5735 ,  C22C38/00 ,  C23C2/003 ,  C23C2/02 ,  C23C2/06 ,  C23C2/40

摘要： Provided is a facility and method for continuously manufacturing a galvanized steel sheet capable of stably achieving high galvanized product quality and high zinc coatability. The facility for continuously manufacturing a galvanized steel sheet which includes a continuous annealing furnace, a snout, and a galvanization bath. The furnace is divided into three zones, i.e., a heating zone for heating a steel strip that is a strip-shaped steel sheet to be passed through the furnace, a soaking zone for soaking the heated steel strip, and a cooling zone for cooling the soaked steel strip, which are arranged in this order from an upstream side of a transport path. The bath is directly connected to the furnace through the snout, which is a closed space through which the steel strip is directly fed into the galvanization bath from the furnace. The facility has a dewpoint meter and a draft port and a suction port for a furnace gas that are provided in at least one of the three zones, gas cyclic paths which connect the draft port and the suction port to a refiner, and a dewpoint meter and a humidification device, which humidifies an inside of the snout, that are provided in the snout. The refiner is a moisture removing device provided outside the furnace and the gas cyclic paths are separately formed for the respective connected zones. The refiner functions so that, for each of the gas cyclic paths, a measured value of the dewpoint meter in the connected zone is equal to a target dewpoint, and the humidification device functions so that a measured value of the dewpoint meter in the snout is equal to a target dewpoint for the snout.

摘要翻译： 提供一种能够连续制造能够稳定地实现高镀锌产品质量和高镀锌性的镀锌钢板的设备和方法。 用于连续制造包括连续退火炉，喷嘴和镀锌浴的镀锌钢板的设备。 炉子分为三个区域，即用于加热钢带的加热区，钢带是通过炉的条状钢板，用于浸渍加热的钢带的均热区和用于冷却 浸渍钢带从传送路径的上游侧依次配置。 浴槽通过鼻孔直接连接到炉子，鼻孔是封闭的空间，钢带从炉子直接进入镀锌浴池。 该设备具有设置在三个区域中的至少一个区域中的露点仪，抽气口和用于炉气的吸入口，将通气口和吸入口连接到精磨机的气体循环路径以及露点计 以及加湿装置，其加湿设置在鼻孔中的鼻孔内部。 精磨机是设置在炉外部的除湿装置，并且气体循环路径分别形成用于各个连接区域。 精磨机的作用是，对于每个气体循环路径，连接区域中的露点计的测量值等于目标露点，并且加湿装置起作用，使得喷嘴中的露点计的测量值为 等于鼻子的目标露点。

公开(公告)号：EP2806051B1

公开(公告)日：2016-04-06

申请号：EP13738039.0

申请日：2013-01-16

申请人： JFE Steel Corporation

发明人： MASUOKA, Hiroyuki ,  ANDO, Satoru ,  AIZAWA, Shigeyuki ,  NAKAZATO, Kazuki ,  TAIRA, Shoichiro

IPC分类号： C23G1/08 ,  C22C38/00 ,  C22C38/06 ,  C23G1/00

CPC分类号： C23G1/08 ,  C21D8/02 ,  C21D8/0278 ,  C21D9/562 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C23G1/00 ,  C23G1/081 ,  C23G1/085 ,  C23G1/086

公开(公告)号：EP2653572A1

公开(公告)日：2013-10-23

申请号：EP11848237.1

申请日：2011-12-13

申请人： JFE Steel Corporation

发明人： TAKAHASHI, Hideyuki ,  SATO, Nobuyuki ,  NAKAZATO, Kazuki ,  IRI, Masato

IPC分类号： C21D9/56 ,  C21D1/74 ,  C21D1/76 ,  C23C2/02 ,  C23C2/06 ,  C23C2/28 ,  C23C2/40 ,  F27D7/06

CPC分类号： C23C2/02 ,  B32B15/013 ,  C21D1/74 ,  C21D1/76 ,  C21D9/56 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C23C2/28 ,  F27B9/28 ,  F27D7/06

摘要： Formation of oxides of elements susceptible to oxidation such as Si and Mn contained in the steel of steel strips due to concentration of the elements susceptible to oxidation in the surfaces of the steel strips during annealing is suppressed. A vertical annealing furnace including a heating zone, a soaking zone, and a cooling zone is used in which a portion of gas in the furnace is introduced into a refiner that is disposed outside of the furnace to decrease the dew point of the gas and the gas whose dew point has been decreased is returned into the furnace. A connection part between the soaking zone and the cooling zone is disposed in an upper portion of the furnace. Suction ports through which the gas in the furnace is sucked so as to be introduced into the refiner are disposed in a portion of the cooling zone near the connection part between the soaking zone and the cooling zone and in an upper portion of the soaking zone. Feed ports through which the gas from the refiner is returned to the furnace are disposed in the connection part between the soaking zone and the cooling zone and in a lower portion of the soaking zone. A gas suction rate Qo1 in the portion of the cooling zone near the connection part between the soaking zone and the cooling zone, a gas suction rate Qo2 in the upper portion of the soaking zone, a gas feed rate Qi1 in the connection part between the soaking zone and the cooling zone, a gas feed rate Qi2 in the lower portion of the soaking zone, a supply rate Qf1 of the atmosphere gas into the cooling zone and a zone subsequent to the cooling zone, a supply rate Qf2 of the atmosphere gas into the soaking zone, an internal volume Vs of the soaking zone, and an average furnace temperature Ts of the soaking zone satisfy relationships including 0.3 x Qf1

摘要翻译： 由于在退火期间由于在钢带表面易受氧化的元素的浓缩，钢带钢中含有的诸如Si和Mn之类的易氧化元素的氧化物的形成被抑制。 使用包括加热区，均热区和冷却区的垂直退火炉，其中将炉中的一部分气体引入到设置在炉外部的精磨机中以降低气体的露点和 露点降低的气体返回炉内。 浸泡区域和冷却区域之间的连接部分设置在炉子的上部。 将吸入炉内的气体引入精炼机的吸入口设置在冷却区附近的均热区域与冷却区域之间的连接部分和浸泡区域上部的部分。 来自磨浆机的气体通过其返回到炉子的进料口设置在均热区域和冷却区域之间的连接部分中以及在均热区域的下部。 在冷却区附近，在均热区域和冷却区域之间的连接部分附近的部分中的气体吸入速率Qo1，均热区域上部的气体吸入速率Qo2，连接部分中的气体供给速率Qi1 均热区域和冷却区域，均热区域下部的气体进料速率Qi2，冷却区域中的气氛气体的供给量Qf1和冷却区域之后的区域，气氛气体的供给量Qf2 进入均热区，均热区的内部体积Vs，均热区的平均炉温Ts满足包括0.3×Qf1