公开(公告)号：US10392706B2

公开(公告)日：2019-08-27

申请号：US15121589

申请日：2015-02-27

Applicant: JFE STEEL CORPORATION

Inventor： Katsuya Hoshino ,  Shoichiro Taira ,  Masayasu Nagoshi ,  Kazutoshi Hanada

IPC: C23C22/53 ,  C23C22/50 ,  C23C22/83 ,  C23C2/06 ,  C23C2/26 ,  C23C2/40 ,  C23C28/00 ,  C23C22/62 ,  C23C22/78

Abstract: A method for producing a galvanized steel sheet includes an oxide layer forming step of bringing a galvanized steel sheet into contact with an acidic solution containing sulfate ions, then holding the galvanized steel sheet in contact for 1 to 60 seconds, and then washing the galvanized steel sheet with water; and a neutralization treatment step of holding a surface of an oxide layer, which has been formed in the oxide layer forming step, in contact with an alkaline aqueous solution for 0.5 seconds or longer, and then performing washing with water and drying. The alkaline aqueous solution contains P ions at a P concentration of 0.01 g/L or more and carbonate ions at a carbonate ion concentration of 0.1 g/L or more.

公开(公告)号：US10351960B2

公开(公告)日：2019-07-16

申请号：US15122036

申请日：2015-02-27

Applicant: JFE STEEL CORPORATION

Inventor： Katsuya Hoshino ,  Shoichiro Taira ,  Masayasu Nagoshi ,  Kazutoshi Hanada

IPC: C23C22/53 ,  B32B15/04 ,  C23C22/83 ,  C23C2/06 ,  C23C2/26 ,  C23C2/40 ,  C25D5/00 ,  C23C28/00 ,  B32B15/18 ,  C23C2/28

Abstract: Provided is a method for producing a galvanized steel sheet that includes an oxide layer forming step of bringing a galvanized steel sheet into contact with an acidic solution containing sulfate ions, then holding the galvanized steel sheet in contact for 1 to 60 seconds, and then washing the galvanized steel sheet with water; and a neutralization treatment step of holding a surface of an oxide layer, which has been formed in the oxide layer forming step, in contact with an alkaline aqueous solution for 0.5 seconds or longer, and then performing washing with water and drying. The alkaline aqueous solution contains 0.1 g/L or more of carbonate ions.

公开(公告)号：US20140102597A1

公开(公告)日：2014-04-17

申请号：US14104451

申请日：2013-12-12

Applicant: JFE STEEL CORPORATION

Inventor： Yoshihiko Ono ,  Kenji Takahashi ,  Kaneharu Okuda ,  Shoichiro Taira

IPC: C23C2/40

CPC classification number: C23C2/40 ,  C21D6/00 ,  C21D9/46 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C22C38/18 ,  C22C38/22 ,  C22C38/28 ,  C22C38/32 ,  C23C2/02 ,  C23C2/06 ,  C23C2/28 ,  Y10T428/12799 ,  Y10T428/12972

Abstract: The high strength galvanized steel sheet contains C: more than 0.015% and lower than 0.100%, Si: 0.3% or lower, Mn: lower than 1.90%, P: 0.015% or more and 0.05% or lower, S: 0.03% or lower, sol.Al: 0.01% or more and 0.5% or lower, N: 0.005% or lower, Cr: lower than 0.30%, B: 0.0003% or more and 0.005% or lower, and Ti: lower than 0.014% in terms of mass %, and satisfies 2.2≦[Mneq]≦3.1 and 0.42≦8[% P]+150B*≦0.73. The steel microstructure contains ferrite and a second phase, in which the second phase area ratio is 3 to 15%, the ratio of the area ratio of martensite and retained γ to the second phase area ratio is more than 70%, and 50% or more of the area ratio of the second phase exists in the grain boundary triple point.

Abstract translation: 高强度镀锌钢板含有C：大于0.015％且低于0.100％，Si：0.3％以下，Mn：低于1.90％，P：0.015％以上0.05％以下，S：0.03％以下 较低，sol.Al：0.01％以上且0.5％以下，N：0.005％以下，Cr：0.30以下，B：0.0003％以上且0.005％以下，Ti：低于0.014％ 质量％，满足2.2＆nlE; [Mneq]＆nlE; 3.1和0.42＆nlE; 8 [％P] + 150B *＆nlE; 0.73。 钢微结构含有铁素体和第二相，其中第二相面积比为3〜15％，马氏体与残留γ的面积比与第二相面积比的比例为70％以上，50％以下 在晶界三点存在更多的第二相面积比。

公开(公告)号：US09809884B2

公开(公告)日：2017-11-07

申请号：US14761133

申请日：2014-01-14

Applicant: JFE STEEL CORPORATION

Inventor： Katsuya Hoshino ,  Shoichiro Taira ,  Wataru Tanimoto ,  Masayasu Nagoshi

IPC: C23C8/80 ,  B08B3/08 ,  C23C22/60 ,  C23C22/07 ,  C23C22/83 ,  C23C22/53 ,  C23C2/06 ,  C23C2/26 ,  C23C22/78 ,  C23C28/00

CPC classification number: C23C22/07 ,  C23C2/06 ,  C23C2/26 ,  C23C22/53 ,  C23C22/60 ,  C23C22/78 ,  C23C22/83 ,  C23C28/321 ,  C23C28/345

Abstract: There is provided a method for manufacturing a galvanized steel sheet that has low sliding resistance in press forming and good degreasing property even under severe alkaline degreasing treatment conditions due to low temperature and short process line length. An oxide layer formed on the surface of a galvanized steel sheet is subjected to neutralization treatment using an alkaline aqueous solution containing 0.01 g/L or more of P ions and 0.01 g/L or more of colloid dispersed particles, wherein the alkaline aqueous solution preferably contains at least one phosphorus compound selected from phosphates, pyrophosphates, and triphosphates and at least one type of colloid dispersed particles selected from Ti, silica, Pt, Pd, Zr, Ag, Cu, Au, and Mg.

公开(公告)号：US09534269B2

公开(公告)日：2017-01-03

申请号：US14058580

申请日：2013-10-21

Applicant: JFE Steel Corporation

Inventor： Yoshihiko Ono ,  Kenji Takahashi ,  Kaneharu Okuda ,  Shoichiro Taira ,  Michitaka Sakurai ,  Yusuke Fushiwaki

IPC: C21D8/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/58

CPC classification number: C21D8/0236 ,  C21D8/02 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/04 ,  C22C38/06 ,  C22C38/58

Abstract: A method of manufacturing a high strength cold rolled steel sheet includes hot-rolling and cold-rolling a steel slab annealing the steel sheet at an annealing temperature of 750° C. to 830° C.; subjecting the steel sheet to first cooling at an average cooling rate of 3° C./sec to 40° C./sec in a temperature range from the annealing temperature to 480° C.; subjecting the steel sheet to second cooling at an average cooling rate of 8° C./sec to 80° C./sec in a temperature range from 480° C. to Tc (° C.) given by formula (6): Tc=435−40×[% Mn]−30×[% Cr]−30×[% V]  (6) wherein [% A] is the content (% by mass) of alloying element A; and subjecting the steel sheet to third cooling at an average cooling rate of 0.3° C./sec to 30° C./sec in a temperature range from Tc (° C.) to 200° C.

Abstract translation: 提供一种用于例如通过压制成型工艺的汽车的压制成形用高强度冷轧钢板和这种钢板的制造方法。 多相钢板具有以质量％计含有0.015％以上且小于0.100％的碳，小于0.40％的硅，1.0〜1.9％的锰，超过0.015％〜0.05％的钢， 磷，0.03％以下的硫，0.01〜0.3％的可溶性铝，0.005％以下的氮，少于0.30％的铬，0.0050％以下的硼，小于0.15％的钼，0.4％以下 的钒，0.02％以下的钛，以及任选的铌，钨，锆，铜，镍，锡，锑，钙，铈，镧和镁中的至少一种，其中[Mneq]为2.0〜2.8， 是铁和杂质。 钢组成满足特定要素的多个参数公式。 钢板具有包含铁素体的微结构，并且含有马氏体的第二相的特定体积分数保留为3。

公开(公告)号：US09297060B2

公开(公告)日：2016-03-29

申请号：US14104451

申请日：2013-12-12

Applicant: JFE STEEL CORPORATION

Inventor： Yoshihiko Ono ,  Kenji Takahashi ,  Kaneharu Okuda ,  Shoichiro Taira

IPC: C23C2/40 ,  C21D6/00 ,  C21D9/46 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C22C38/18 ,  C22C38/22 ,  C22C38/28 ,  C22C38/32 ,  C23C2/02 ,  C23C2/06 ,  C23C2/28

CPC classification number: C23C2/40 ,  C21D6/00 ,  C21D9/46 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C22C38/18 ,  C22C38/22 ,  C22C38/28 ,  C22C38/32 ,  C23C2/02 ,  C23C2/06 ,  C23C2/28 ,  Y10T428/12799 ,  Y10T428/12972

Abstract: The high strength galvanized steel sheet contains C: more than 0.015% and lower than 0.100%, Si: 0.3% or lower, Mn: lower than 1.90%, P: 0.015% or more and 0.05% or lower, S: 0.03% or lower, sol.Al: 0.01% or more and 0.5% or lower, N: 0.005% or lower, Cr: lower than 0.30%, B: 0.0003% or more and 0.005% or lower, and Ti: lower than 0.014% in terms of mass %, and satisfies 2.2≦[Mneq]≦3.1 and 0.42≦8[% P]+150B*≦0.73. The steel microstructure contains ferrite and a second phase, in which the second phase area ratio is 3 to 15%, the ratio of the area ratio of martensite and retained γ to the second phase area ratio is more than 70%, and 50% or more of the area ratio of the second phase exists in the grain boundary triple point.

Abstract translation: 高强度镀锌钢板含有C：大于0.015％且低于0.100％，Si：0.3％以下，Mn：低于1.90％，P：0.015％以上0.05％以下，S：0.03％以下 较低，sol.Al：0.01％以上且0.5％以下，N：0.005％以下，Cr：0.30以下，B：0.0003％以上且0.005％以下，Ti：低于0.014％ 质量％，满足2.2＆nlE; [Mneq]＆nlE; 3.1和0.42＆nlE; 8 [％P] + 150B *＆nlE; 0.73。 钢微结构含有铁素体和第二相，其中第二相面积比为3〜15％，马氏体与残留γ的面积比与第二相面积比的比例为70％以上，50％以下 在晶界三点存在更多的第二相面积比。

公开(公告)号：US20160024660A1

公开(公告)日：2016-01-28

申请号：US14761133

申请日：2014-01-14

Applicant: JFE STEEL CORPORATION

Inventor： Katsuya Hoshino ,  Shoichiro Taira ,  Wataru Tanimoto ,  Masayasu Nagoshi

IPC: C23C22/07 ,  C23C22/83 ,  C23C28/00 ,  C23C22/60

CPC classification number: C23C22/07 ,  C23C2/06 ,  C23C2/26 ,  C23C22/53 ,  C23C22/60 ,  C23C22/78 ,  C23C22/83 ,  C23C28/321 ,  C23C28/345

Abstract: There is provided a method for manufacturing a galvanized steel sheet that has low sliding resistance in press forming and good degreasing property even under severe alkaline degreasing treatment conditions due to low temperature and short process line length. An oxide layer formed on the surface of a galvanized steel sheet is subjected to neutralization treatment using an alkaline aqueous solution containing 0.01 g/L or more of P ions and 0.01 g/L or more of colloid dispersed particles, wherein the alkaline aqueous solution preferably contains at least one phosphorus compound selected from phosphates, pyrophosphates, and triphosphates and at least one type of colloid dispersed particles selected from Ti, silica, Pt, Pd, Zr, Ag, Cu, Au, and Mg.

Abstract translation: 提供了一种制造镀锌钢板的方法，即使在严酷的碱性脱脂处理条件下，由于低温和短的生产线长度，在压制成型中具有低的滑动阻力和良好的脱脂性能。 使用含有0.01g / L以上的P离子和0.01g / L以上的胶体分散粒子的碱性水溶液对形成在镀锌钢板表面上的氧化物层进行中和处理，其中优选 含有选自磷酸盐，焦磷酸盐和三磷酸盐中的至少一种磷化合物和选自Ti，二氧化硅，Pt，Pd，Zr，Ag，Cu，Au和Mg中的至少一种胶体分散颗粒。

公开(公告)号：US20160002807A1

公开(公告)日：2016-01-07

申请号：US14770498

申请日：2014-02-26

Applicant: JFE STEEL CORPORATION

Inventor： Shoichiro Taira ,  Wataru Tanimoto

IPC: C25D5/36 ,  C21D1/26 ,  C21D6/00 ,  C23C22/07 ,  C25D3/22 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C23G1/08 ,  C21D9/46 ,  C23F17/00

CPC classification number: C25D5/36 ,  B32B15/013 ,  C21D1/26 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0236 ,  C21D9/46 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C23C22/07 ,  C23F17/00 ,  C23G1/08 ,  C25D3/22 ,  C25D5/48 ,  C25D7/0614 ,  C25F1/06

Abstract: A process of manufacturing high-strength cold rolled steel sheets containing 0.5 to 2.0 mass % silicon includes a pickling step of thermally annealing a steel sheet in a non-oxidizing atmosphere and thereafter pickling the steel sheet to dissolve away 0.5 g/m2 to less than 2.0 g/m2 of the steel sheet, and an electroplating step of electroplating the surface of the pickled steel sheet with zinc under such conditions that a coating mass of 100 to 5000 mg/m2 is obtained.

Abstract translation: 含有0.5〜2.0质量％硅的高强度冷轧钢板的制造方法包括在非氧化性气氛中对钢板进行热退火的酸洗工序，然后酸洗钢板以0.5g / m 2以下，以小于 2.0g / m 2的钢板，以及在获得100〜5000mg / m 2的涂布质量的条件下用锌电镀酸洗的钢板表面的电镀工序。

公开(公告)号：US20150013716A1

公开(公告)日：2015-01-15

申请号：US14372912

申请日：2013-01-16

Applicant: JFE STEEL CORPORATION

Inventor： Hiroyuki Masuoka ,  Satoru Ando ,  Shigeyuki Aizawa ,  Kazuki Nakazato ,  Shoichiro Taira

IPC: C23G1/08

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

Abstract: 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.

Abstract translation: 在经过再次酸化的钢板表面防止黄化的方法中，在连续退火钢板的表面被酸洗后，用水洗涤并干燥以从钢的表面层除去含Si氧化物层 在酸洗和再酸洗之间以及再酸洗和洗涤之间，钢板的表面处于湿润状态，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：US20140102596A1

公开(公告)日：2014-04-17

申请号：US14058580

申请日：2013-10-21

Applicant: JFE Steel Corporation

Inventor： Yoshihiko Ono ,  Kenji Takahashi ,  Kaneharu Okuda ,  Shoichiro Taira ,  Michitaka Sakurai ,  Yusuke Fushiwaki

IPC: C21D8/02

CPC classification number: C21D8/0236 ,  C21D8/02 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/04 ,  C22C38/06 ,  C22C38/58

Abstract: A method of manufacturing a high strength cold rolled steel sheet includes hot-rolling and cold-rolling a steel slab annealing the steel sheet at an annealing temperature of 750° C. to 830° C.; subjecting the steel sheet to first cooling at an average cooling rate of 3° C./sec to 40° C./sec in a temperature range from the annealing temperature to 480° C.; subjecting the steel sheet to second cooling at an average cooling rate of 8° C./sec to 80° C./sec in a temperature range from 480° C. to Tc (° C.) given by formula (6): Tc=435−40×[% Mn]−30×[% Cr]−30×[% V](6) wherein [% A] is the content (% by mass) of alloying element A; and subjecting the steel sheet to third cooling at an average cooling rate of 0.3° C./sec to 30° C./sec in a temperature range from Tc (° C.) to 200° C.

Abstract translation: 制造高强度冷轧钢板的方法包括在退火温度为750℃至830℃的条件下对钢板进行热轧和冷轧。 在退火温度至480℃的温度范围内以3℃/秒至40℃/秒的平均冷却速度对钢板进行第一次冷却; 在由式（6）给出的480℃至Tc（℃）的温度范围内以8℃/秒至80℃/秒的平均冷却速率对钢板进行第二次冷却：Tc = 435-40×[％Mn] -30×[％Cr] -30×[％V]（6）其中[％A]为合金元素A的含量（质量％）; 在Tc（℃）〜200℃的温度范围内以0.3℃/秒〜30℃/秒的平均冷却速度对钢板进行第3次冷却。