公开(公告)号：US20040035501A1

公开(公告)日：2004-02-26

申请号：US10647419

申请日：2003-08-25

Applicant: Kawasaki Steel Corporation, a corporation of Japan

Inventor： Yoshihiro Yazawa ,  Osamu Furukimi ,  Mineo Muraki ,  Yoshihiro Ozaki ,  Kunio Fukuda ,  Yukihiro Baba

IPC: C22C038/26 ,  C22C038/28

CPC classification number: C22C38/001 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0268 ,  C21D8/0278 ,  C21D8/0468 ,  C22C38/004 ,  C22C38/06 ,  C22C38/44 ,  C22C38/48 ,  C22C38/50 ,  C23C30/00

Abstract: A ferritic stainless steel sheet for use in automobile fuel tanks and fuel pipes having smooth surface and resistance to organic acid is provided. The sheet contains, by mass, not more than about 0.1% C, not more than about 1.0 Si, not more than about 1.5% Mn, not more than about 0.06% P, not more than about 0.03% S, about 11% to about 23% Cr, not more than about 2.0% Ni, about 0.5% to about 3.0% Mo, not more than about 1.0% Al, not more than about 0.04% N, at least one of not more than about 0.8% Nb and not more than about 1.0% Ti, and the balance being Fe and unavoidable impurities, satisfying the relationship: 18nullNb/(CnullN)null2Ti/(CnullN)null60, wherein C, N, Nb, and Ti in the relationship represent the C, N, Nb, and Ti contents by mass percent, respectively. A process for making the same is also provided.

Abstract translation: 提供了一种用于汽车燃料箱的铁素体不锈钢板和具有光滑表面和耐有机酸的燃料管。 该片材质量不超过约0.1％C，不大于约1.0Si，不大于约1.5％Mn，不大于约0.06％P，不大于约0.03％S，约11％ 约23％的Cr，不超过约2.0％的Ni，约0.5％至约3.0％的Mo，不大于约1.0％的Al，不超过约0.04％的N，至少一种不大于约0.8％的Nb和 不超过约1.0％Ti，余量为Fe和不可避免的杂质，满足关系：18 <= Nb /（C + N）+ 2Ti /（C + N）≤60，其中C，N，Nb， 关系中的Ti分别表示C，N，Nb，Ti的质量百分比含量。 还提供了制备其的方法。

公开(公告)号：US20030106622A1

公开(公告)日：2003-06-12

申请号：US10163728

申请日：2002-06-06

Applicant: KAWASAKI STEEL CORPORATION

Inventor： Saiji Matsuoka ,  Tetsuo Shimizu ,  Kei Sakata ,  Osamu Furukimi

IPC: C21D008/02

CPC classification number: C22C38/02 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0273 ,  C21D8/0278 ,  C22C38/04 ,  C22C38/12 ,  C22C38/16 ,  C23C2/02 ,  C23C2/28 ,  Y10T428/12799

Abstract: A steel sheet composition contains appropriate amounts of C, Si, Mn, P, S, Al and N and 0.5 to 3.0% Cu. A composite structure of the steel sheet has a ferrite phase or a ferrite phase and a tempered martensite phase as a primary phase, and a secondary phase containing retained austenite in a volume ratio of not less than 1%. In place of the Cu, at least one of Mo, Cr, and W may be contained in a total amount of not more than 2.0%. This composition is useful in production of a high-ductility hot-rolled steel sheet, a high-ductility cold-rolled steel sheet and a high-ductility hot-dip galvanized steel sheet having excellent press formability and excellent stain age hardenability as represented by a nullTS of not less than 80 MPa, in which the tensile strength increases remarkably through a heat treatment at a relatively low temperature after press forming.

Abstract translation: 钢板组合物含有适量的C，Si，Mn，P，S，Al和N以及0.5〜3.0％的Cu。 钢板的复合结构具有铁素体相或铁素体相，回火马氏体相作为主相，第二相含有体积比为1％以上的残留奥氏体。 代替Cu，Mo，Cr和W中的至少一种可以含有不超过2.0％的总量。 该组合物可用于生产高延展性热轧钢板，高延展性冷轧钢板和高延展性热浸镀锌钢板，其具有优异的压制成形性和优异的耐老化淬透性，如 不低于80MPa的DELTATS，其中拉伸强度通过在压制成型后的较低温度下的热处理显着增加。

公开(公告)号：US20040007297A1

公开(公告)日：2004-01-15

申请号：US10429018

申请日：2003-05-02

Applicant: Kawasaki Steel Corporation, a corporation of Japan

Inventor： Saiji Matsuoka ,  Tetsuo Shimizu ,  Kei Sakata ,  Osamu Furukimi

IPC: C22C038/16

CPC classification number: C22C38/16 ,  C21D1/185 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0273 ,  C21D8/0278 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C23C2/02 ,  C23C2/06 ,  C23C2/40 ,  Y10T428/12799

Abstract: The present invention provides a steel sheet having a chemical composition comprising 0.15% or less C, 2.0% or less Si, 3.0% or less Mn, P, S, Al and N in adjusted amounts, from 0.5 to 3.0% Cu, or one or more of Cr, Mo and W in a total amount of 2.0% or less, and having a composite structure comprising ferrite and martensite having an area ratio of 2% or more. The steel sheet is in the form of a high-strength hot-rolled steel sheet, a high-strength cold-rolled steel sheet, or a hot-dip galvanized steel sheet. There is thus available a steel sheet excellent in press-formability and in strain age hardening property as represented by a nullTS of 80 MPa or more.

Abstract translation: 本发明提供一种钢板，其特征在于，含有0.15％以下的C，2.0％以下的Si，3.0％以下的Mn，P，S，Al，N以及0.5〜3.0％的Cu， 或更多的Cr，Mo和W的总量为2.0％以下，并且具有包含面积比为2％以上的铁素体和马氏体的复合结构。 钢板为高强度热轧钢板，高强度冷轧钢板或热浸镀锌钢板的形式。 因此可获得如DeltaTS为80MPa以上的压制成形性和应变时效硬化性优异的钢板。

公开(公告)号：US20030138342A1

公开(公告)日：2003-07-24

申请号：US10328598

申请日：2002-12-23

Applicant: Kawasaki Steel Corporation

Inventor： Junichiro Hirasawa ,  Takumi Ujiro ,  Osamu Furukimi

IPC: C22C038/52 ,  C22C038/32 ,  C22C038/34

CPC classification number: C22C38/44 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0236 ,  C22C38/002 ,  C22C38/004 ,  C22C38/06

Abstract: A martensitic stainless steel sheet having superior corrosion resistance, toughness at the weld zones, and workability. The composition of the steel sheet is, on a mass basis: less than about 0.02% of carbon; about 1.0% or less of silicon; less than about 1.5% of manganese; about 0.04% or less of phosphorus; about 0.01% or less of sulfur; about 0.1% or less of aluminum; about 1.5% or more and less than about 4.0% of nickel; about 11% or more and less than about 15% of chromium; about 0.5% or more and less than about 2.0% of molybdenum; and less than about 0.02% of nitrogen, the balance being iron and unavoidable impurities, wherein 15.0%nullnullCrnullnull1.5nullnullMonullnull1.2nullnullNinullnull20.0%; nullCnullnullnullNnull 3.0%; and 8.0%null72nullnullCnullnull40nullnullNnullnull3nullnullSinullnull2nullnullMnnullnull4nullnullNinullnullnullMonullnull18.0%.

公开(公告)号：US20020160248A1

公开(公告)日：2002-10-31

申请号：US10078737

申请日：2002-02-19

Applicant: Kawasaki Steel Corporation

Inventor： Kenji Takao ,  Takeshi Yokota ,  Osamu Furukimi ,  Shin Ishikawa ,  Kazuhide Ishii ,  Shigeru Takano

IPC: H01M008/02

CPC classification number: C22C38/007 ,  C22C38/004 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  H01M8/021 ,  H01M8/0228 ,  H01M8/0254 ,  H01M8/026 ,  H01M2008/1095 ,  H01M2300/0082 ,  Y02P70/56 ,  Y10T428/12354

Abstract: A stainless steel separator having gas channels including grooves and projections for fuel cells. The separator has a composition including about 0.03 mass percent or less of carbon; about 0.03 mass percent or less of nitrogen, the total content of carbon and nitrogen being about 0.03 mass percent or less; about 16 mass percent to about 45 mass percent chromium; about 0.5 mass percent to about 3.0 mass percent molybdenum; and the balance being iron and incidental impurities. The separator has a contact resistance of about 100 mnullnullcm2 or less. Preferably, the projections have an arithmetic average surface roughness Ra in the range of about 0.01 to about 1.0 nullm and a maximum height Ry in the range of about 0.01 to about 20 nullm. The stainless steel separator preferably further includes about 0.001 to about 0.1 mass percent silver. A fuel cell including this separator exhibits a stable output voltage for a long period of time.

Abstract translation: 具有气体通道的不锈钢隔板，包括用于燃料电池的凹槽和凸起。 该隔膜具有碳的约0.03质量％以下的组成， 约0.03质量％以下的氮，碳和氮的总含量为约0.03质量％以下; 约16质量％至约45质量％的铬; 约0.5质量％至约3.0质量％的钼; 余量为铁和杂质。 隔膜的接触电阻约为100mOMEGA·cm 2以下。 优选地，突起的算术平均表面粗糙度Ra在约0.01至约1.0μm的范围内，最大高度Ry在约0.01至约20μm的范围内。 不锈钢隔板优选进一步包含约0.001至约0.1质量％的银。 包括该隔板的燃料电池在长时间内表现出稳定的输出电压。

公开(公告)号：US20020098107A1

公开(公告)日：2002-07-25

申请号：US09987327

申请日：2001-11-14

Applicant: Kawasaki Steel Corporation

Inventor： Atsushi Miyazaki ,  Junichiro Hirasawa ,  Mineo Muraki ,  Yoshihiro Yazawa ,  Osamu Furukimi

IPC: C22C038/26

CPC classification number: C22C38/48 ,  C21D6/004 ,  C21D6/02 ,  C22C38/001 ,  C22C38/004 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/44 ,  C22C38/46

Abstract: The soft Cr-containing steel includes, on a % by mass basis, C: from about 0.001% to about 0.020%, Si: more than about 0.10% and less than about 0.50%, Mn: less than about 2.00%, P: less than about 0.060%, S: less than about 0.008%, Cr: from about 12.0% to about 16.0%, Ni: from about 0.05% to about 1.00%, N: less than about 0.020%, Nb: from about 10null(CnullN) to about 1.00%, Mo: more than about 0.80% and less than about 3.00%, wherein the contents of alloying elements, represented by Si and Mo, respectively, on a % by mass, satisfy the formula Si null1.2-0.4 Mo, so as to prevent precipitation of the Laves phase and to stably secure an effect of increasing high-temperature strength due to solid solution Mo.

Abstract translation: 含有软Cr的钢包括以质量％计，C：约0.001％至约0.020％，Si：大于约0.10％且小于约0.50％，Mn：小于约2.00％，P： 小于约0.060％，S：小于约0.008％，Cr：约12.0％至约16.0％，Ni：约0.05％至约1.00％，N：小于约0.020％，Nb：约10x C + N）至约1.00％，Mo：大于约0.80％且小于约3.00％，其中由Si和Mo表示的合金元素的含量分别为质量％满足式Si < 1.2-0.4 Mo，以防止Laves相沉淀，并稳定地确保由于固溶Mo而导致的高温强度提高的效果。

公开(公告)号：US20030188813A1

公开(公告)日：2003-10-09

申请号：US10395475

申请日：2003-03-24

Applicant: KAWASAKI STEEL CORPORATION

Inventor： Junichiro Hirasawa ,  Takumi Ujiro ,  Osamu Furukimi

IPC: C22C038/52 ,  C22C038/42 ,  C22C038/44

CPC classification number: C22C38/004 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/44 ,  Y10T428/12958

Abstract: A structural hot-rolled or cold-rolled stainless steel sheet having improved intergranular corrosion resistance and toughness at the welding heat affected zone and further having low strength and high elongation. The composition of the steel sheet contains less than about 0.008 mass percent of C; about 1.0 mass percent or less of Si; about 1.5 mass percent or less of Mn; about 11 to about 15 mass percent of Cr; more than about 1.0 mass percent and about 2.5 mass percent or less of Ni; less than about 0.10 mass percent of Al; about 0.009 mass percent or less of N; about 0.04 mass percent or less of P; about 0.01 mass percent or less of S; and the balance being Fe and incidental impurities. These contents satisfy the expressions: (Cr)null1.2null(Ni)null15.0; (Ni)null0.5null(Mn)null30null(C)null3.0; (C)null(N)null0.015; and (Cr)null(Mn)null1.7null(Ni)null27null(C)null100null(N)null9.0.

Abstract translation: 一种结构热轧或冷轧不锈钢板，其在焊接热影响区具有改善的晶间耐腐蚀性和韧性，并且还具有低强度和高伸长率。 钢板的组成含有小于约0.008质量％的C; 约1.0质量％以下的Si; 约1.5质量％以下的Mn; 约11〜约15质量％的Cr; 大于约1.0质量％和约2.5质量％以下的Ni; 小于约0.10质量％的Al; 约0.009质量％以下的N; 约0.04质量％以下的P; 约为0.01质量％以下的S; 余量为Fe和杂质。 这些含量满足以下表达式：（Cr）+ 1.2×（Ni）> = 15.0; （Ni）+ 0.5x（Mn）+ 30x（C）<= 3.0; （C）+（N）<= 0.015; 和（Cr） - （Mn）-1.7x（Ni）-27x（C）-100x（N）> = 9.0。

公开(公告)号：US20020155019A1

公开(公告)日：2002-10-24

申请号：US10046158

申请日：2002-01-16

Applicant: KAWASAKI STEEL CORPORATION

Inventor： Hiroki Ota ,  Takumi Ujiro ,  Junichiro Hirasawa ,  Osamu Furukimi

IPC: C22C038/52

CPC classification number: C22C38/002 ,  C22C38/004 ,  C22C38/44 ,  C22C38/46 ,  C22C38/52 ,  C22C38/58

Abstract: A corrosion-resistant chromium steel for architectural and civil engineering structural elements, includes 0.0015 to 0.02 mass percent C, 0.0015 to 0.02 mass percent N, 0.1 to 1.0 mass percent Si, 0.1 to 3.0 mass percent Mn, more than 5 mass percent to less than 10 mass percent Cr, 0.01 to 3.0 mass percent Ni, 0.1 mass percent or less of Al, 0.05 mass percent or less of P, 0.03 mass percent or less of S, 0.01 to 1.0 mass percent Co, and the balance being Fe and incidental impurities. The steel has high long-term corrosion resistance and high weld-zone toughness. Preferably, the steel further includes 0.01 to 0.5 mass percent V and 0.001 to 0.05 mass percent W, the Cr content is in the range of more than 5 mass percent to less than 8 mass percent, and the Cr, V, and W contents are within a specified ratio.

Abstract translation: 用于建筑和土木工程结构元件的耐腐蚀铬钢包括C：0.0015〜0.02质量％，N：0.0015〜0.02质量％，Si：0.1〜1.0质量％，Mn：0.1〜3.0质量％，5质量％以下 的Cr，0.01〜3.0质量％的Ni，0.1质量％以下的Al，0.05质量％以下的P，0.03质量％以下的S，0.01〜1.0质量％的Co，余量是Fe和 附带杂质。 该钢具有较高的长期耐腐蚀性和较高的焊接区韧性。 优选钢还含有0.01〜0.5质量％的V和0.001〜0.05质量％的W，Cr含量在5质量％〜小于8质量％的范围内，Cr，V和W的含量为 在规定的比例内。

公开(公告)号：US20040031547A1

公开(公告)日：2004-02-19

申请号：US10643227

申请日：2003-08-18

Applicant: Kawasaki Steel Corporation

Inventor： Akio Tosaka ,  Sinjiro Kaneko ,  Yoichi Tominaga ,  Noriyuki Katayama ,  Nobutaka Kurosawa ,  Kei Sakata ,  Osamu Furukimi

IPC: C21D008/02

CPC classification number: C21D8/0226 ,  C21D8/0236 ,  C21D2221/02 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12

Abstract: The present invention provides a high tensile strength hot-rolled steel sheet having superior strain aging hardenability, which has high formability and stable quality characteristics, and in which satisfactory strength is obtained when the steel sheet is formed into automotive components, thus enabling the reduction in weight of automobile bodies. Specifically, a method for producing a high tensile strength hot-rolled steel sheet having superior strain aging hardenability with a BH of 80 MPa or more, a nullTS of 40 MPa or more, and a tensile strength of 440 MPa or more includes the steps of heating a steel slab to 1,000null C. or more, the steel slab containing, in percent by mass, 0.15% or less of C, 2.0% or less of Si, 3.0% or less of Mn,. 0.08% or less of P, 0.02% or less of S, 0.02% or less of Al, 0.0050% to 0.0250% of N, and optionally 0.1% or less in total of at least one of more than 0.02% to 0.1% of Nb and more than 0.02% to 0.1% of V, the ratio N (mass %)/Al (mass %) being 0.3 or more; rough-rolling the steel slab to form a sheet bar; finish-rolling the sheet bar at a finishing temperature of 800null C. or more; cooling at a cooling rate of 20null C. to 40null C. or more within 0.5 second after the finish-rolling; and coiling at a temperature of 650null C. to 450null C. or less.

Abstract translation: 本发明提供一种具有优异的应变时效淬透性的高抗拉强度热轧钢板，其成形性高，质量特性稳定，当钢板形成汽车部件时，能够获得令人满意的强度， 汽车车身重量。 具体而言，制造具有优异的应变时效淬透性，BH为80MPa以上，ΔTTS为40MPa以上，拉伸强度为440MPa以上的高强度热轧钢板的制造方法，其特征在于， 将钢坯加热至1000℃以上，所述钢坯以质量％计含有0.15％以下的C，2.0％以下的Si，3.0％以下的Mn。 0.08％以下的P，0.02％以下的S，0.02％以下的Al，0.0050％〜0.0250％的N，以及任选的0.1％以下， Nb和大于0.02％至0.1％的V，N（质量％）/ Al（质量％）的比率为0.3以上; 粗轧钢板以形成板材; 在800℃或更高的终轧温度下对板材进行精轧; 在精轧后的0.5秒内以20℃〜40℃的冷却速度冷却; 并在650℃至450℃或更低的温度下卷取。

公开(公告)号：US20030213535A1

公开(公告)日：2003-11-20

申请号：US10429013

申请日：2003-05-02

Applicant: Kawasaki Steel Corporation, a corporation of Japan

Inventor： Saiji Matsuoka ,  Tetsuo Shimizu ,  Kei Sakata ,  Osamu Furukimi

IPC: C21D008/00

CPC classification number: C22C38/16 ,  C21D1/185 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0273 ,  C21D8/0278 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C23C2/02 ,  C23C2/06 ,  C23C2/40 ,  Y10T428/12799

Abstract: The present invention provides a steel sheet having a chemical composition comprising 0.15% or less C, 2.0% or less Si, 3.0% or less Mn, P, S, Al and N in adjusted amounts, from 0.5 to 3.0% Cu, or one or more of Cr, Mo and W in a total amount of 2.0% or less, and having a composite structure comprising ferrite and martensite having an area ratio of 2% or more. The steel sheet is in the form of a high-strength hot-rolled steel sheet, a high-strength cold-rolled steel sheet, or a hot-dip galvanized steel sheet. There is thus available a steel sheet excellent in press-formability and in strain age hardening property as represented by a nullTS of 80 MPa or more.

Abstract translation: 本发明提供一种钢板，其特征在于，含有0.15％以下的C，2.0％以下的Si，3.0％以下的Mn，P，S，Al，N以及0.5〜3.0％的Cu， 或更多的Cr，Mo和W的总量为2.0％以下，并且具有包含面积比为2％以上的铁素体和马氏体的复合结构。 钢板为高强度热轧钢板，高强度冷轧钢板或热浸镀锌钢板的形式。 因此可获得如DeltaTS为80MPa以上的压制成形性和应变时效硬化性优异的钢板。