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    • 1. 发明专利
    • Cold rolled steel sheet and production method thereof
    • 冷轧钢板及其生产方法
    • JP2014141718A
    • 2014-08-07
    • JP2013011758
    • 2013-01-25
    • Jfe Steel CorpJfeスチール株式会社
    • YAMADA KATSUMITAKASAKA NORIAKITANAKA YUJI
    • C22C38/00C21D9/46C22C38/14
    • PROBLEM TO BE SOLVED: To provide a cold rolled steel sheet which is produced by utilizing precipitation strengthening of fine carbide, instead of solid-solution strengthening of Si, Mn, or the like, and has a tensile strength of 590 MPa or higher and good workability.SOLUTION: A cold rolling steel sheet comprises, by mass%, C:0.07-0.12%, Si+Al:0.50% or less, Mn:0.15-0.45%, P:0.05-0.10%, S:0.004% or less, N:0.0045% or less, Ti:0.09-0.14%, B:0.0003-0.0010% and remaining Fe and unavoidable impurities and meets the condition 2.4≤4C/Ti≤4.5, where Tiis expressed by Ti=Ti-(3.43 N+1.5S). The cold rolling steel sheet contains a ferrite phase in a volume fraction of 90% or higher and cementite in a volume fraction of 5-10%. The ferrite phase contains isometric ferrite grains in a volume fraction of at least 70%. In the ferrite phase, Ti carbide of an average grain size of smaller than 15 nm is precipitated.
    • 要解决的问题:为了提供通过利用细小碳化物的析出强化制造的冷轧钢板,代替Si,Mn等的固溶强化,并且拉伸强度为590MPa以上,良好 加工性。冷轧钢板以质量%计含有C:0.07〜0.12%,Si + Al:0.50%以下,Mn:0.15〜0.45%,P:0.05〜0.10%,S:0.004% 较小,N:0.0045%以下,Ti:0.09〜0.14%,B:0.0003〜0.0010%,剩余的Fe和不可避免的杂质,满足条件2.4≤4C/Ti≤4.5,Ti表示Ti = Ti-(3.43 N + 1.5S)。 冷轧钢板含有体积分率为90%以上的铁素体相和体积分数为5-10%的渗碳体。 铁素体相含有体积分数至少为70%的等轴铁素体晶粒。 在铁素体相中,析出平均粒径小于15nm的Ti碳化物。
    • 2. 发明专利
    • Radioactive substance container, radioactive substance storage facility and its constructing method, and radioactive substance storage structure
    • 放射性物质容器,放射性物质储存设施及其构造方法和放射性物质储存结构
    • JP2014025922A
    • 2014-02-06
    • JP2013130885
    • 2013-06-21
    • Jfe Steel CorpJfeスチール株式会社
    • HAYASHI MASAHIROYAMADA KATSUMIINOUE YOTARO
    • G21F9/36G21F1/04G21F1/08
    • PROBLEM TO BE SOLVED: To provide a radioactive substance container excellent in radiation shielding performance and radioactive substance sealing performance and facilitating installation and relocation thereof, a radioactive substance storage facility and its constructing method, and a radioactive substance storage structure.SOLUTION: A radioactive substance container 10 having an internal space 12 for containing a radioactive substance and formed of a hollow steel pipe 14 to be embedded in the ground comprises: steel materials for blocking the end portions 14a and 14b of the hollow steel pipe 14; and a radiation shielding material 18 for covering the internal surface 14c of the hollow steel pipe 14. A constructing method of a radioactive substance storage facility having the radioactive substance container 10 embedded in the ground includes containing the radioactive substance in the internal space 12 before and after installing the radioactive substance container 10 in the ground.
    • 要解决的问题:提供放射性物质容器,辐射屏蔽性能和放射性物质密封性能优良,放置物质密封性好,放射性物质储存设施及其构造方法和放射性物质储存结构。解决方案:放射性物质 具有用于容纳放射性物质的内部空间12并由埋设在地面中的中空钢管14形成的容器10包括:用于阻塞中空钢管14的端部14a和14b的钢材; 以及用于覆盖中空钢管14的内表面14c的放射线屏蔽材料18.放射性物质储存设施的构造方法,其具有嵌入地面的放射性物质容器10,包括将放射性物质包含在之前的内部空间12和 将放射性物质容器10安装在地面之后。
    • 3. 发明专利
    • High strength hot dip galvanized hot rolled steel sheet and method for producing the same
    • 高强度热镀锌热轧钢板及其制造方法
    • JP2013019046A
    • 2013-01-31
    • JP2011249316
    • 2011-11-15
    • Jfe Steel CorpJfeスチール株式会社
    • YAMADA KATSUMITANAKA YUJIFUNAKAWA YOSHIMASA
    • C22C38/00C21D9/46C22C38/14C23C2/06
    • PROBLEM TO BE SOLVED: To provide an inexpensive high strength hot dip galvanized hot rolled steel sheet which has excellent stretch and stretch flange formability and has a TS of 815 to 1,000 MPa, and to provide a method for producing the same.SOLUTION: The high strength hot dip galvanized hot rolled steel sheet has a composition comprising, by mass, 0.07 to 0.10% C, ≤0.50% Si+Al, 1.0 to 1.5% Mn, 0.060 to 0.200% P, 0.0020 to 0.0045% N, 0.010 to 0.02% Ti and 0.23 to 0.60% V, and the balance Fe with inevitable impurities, and has a microstructure composed of a ferrite single phase, and in which VCs with a size of
    • 要解决的问题:提供一种廉价的具有优异的拉伸和拉伸凸缘成形性的高强度热浸镀锌热轧钢板,其TS为815〜1000MPa,并提供其制造方法。 解决方案:高强度热浸镀锌热轧钢板具有质量分数为0.07〜0.10%的C,≤0.50%的Si + Al,1.0〜1.5%的Mn,0.060〜0.200%的P,0.0020〜 0.0045%N,0.010〜0.02%Ti,0.23〜0.60%V,余量为Fe与不可避免的杂质,具有由铁素体单相构成的微结构,其中尺寸<10nm的VC析出于 铁素体相的析出量V满足≥0.15质量%; 其中,VC的大小是通过求出从2观察到的2 1/2 ×L(L表示正方形片材的长度)表示的VC的大小而获得的值 通过透射电子显微镜将铁素体相的[001]取向作为矩阵,并且对其进行算术测量。 版权所有(C)2013,JPO&INPIT
    • 5. 发明专利
    • 加工性および靭性に優れた高強度熱延鋼板およびその製造方法
    • 高强度热轧钢板具有优异的耐磨性和韧性及其生产方法
    • JP2015017322A
    • 2015-01-29
    • JP2014115399
    • 2014-06-04
    • Jfeスチール株式会社Jfe Steel Corp
    • TANAKA YUJIYAMADA KATSUMITAKASAKA NORIAKI
    • C22C38/00C21D9/46C22C38/14C23C2/04C23C2/28C23C2/40
    • 【課題】加工性および靭性を兼備した高強度熱延鋼板およびその製造方法を提供する。【解決手段】質量%で、C:0.07〜0.12%、Si:0.2%以下、Mn:0.1〜1.2%、P:0.025%以下、S:0.005%以下、Al:0.1%以下、N:0.008%以下、Ti:0.14〜0.20%、V:0.05〜0.15%を、C、Ti、V、SおよびNが((Ti/48)−(N/14)−(S/32))/(V/51)>1.0および(C/12)/((Ti/48)−(N/14)−(S/32)+(V/51))>1.0(C、Ti、V、S、N:各元素の含有量(質量%))を満足するように含有し、且つ、固溶Tiが質量%で0.04%以下、炭化物として析出していないCが質量%で0.022%以上であり、残部がFeおよび不可避的不純物からなる組成と、組織全体に対するフェライト相の面積率が95%以上であり、該フェライト相の平均結晶粒径が5.0μm以下であり、TiおよびVを含む炭化物であって、前記フェライト相の[001]方向から観察したときの形状が、平均長さ8nm以下、平均幅1nm以下の矩形状となる炭化物が析出した組織とすることで、引張強さが980MPa以上であり且つ加工性、靭性に優れた高強度熱延鋼板とする。なお、表面に溶融亜鉛めっき層を形成してもよい。なお、上記した組成に加えてさらに、Mo、Nb、Wのうちの1種以上を含有してもよい。【選択図】なし
    • 要解决的问题:提供一种结合加工性和韧性的高强度热轧钢板及其制造方法。解决方案:高强度热轧钢板以质量%计含有0.07-0.12%的C,0.2 ,Si:0.1〜1.2%,P:0.025%以下,S:0.005%以下,Al:0.1%以下,N:0.008%以下,Ti:0.14〜0.20% 满足条件((Ti / 48) - (N / 14) - (S / 32))/(V / 51)的元素C,Ti,V,S和N元素的含量,质量% )> 1.0和(C / 12)/((Ti / 48) - (N / 14) - (S / 32)+(V / 51))> 1.0时,固溶Ti的含量为0.04质量% 碳化物未沉积的C的含量为0.022质量%以上,剩余的Fe和不可避免的杂质。 铁素体相相对于整个结构的面积比为95%以上,铁素体相的平均结晶粒径为5.0μm以下。 从铁素体相的[001]方向观察到的包含Ti和V并且具有平均长度为8nm以下且平均宽度为1nm以下的矩形的碳化物被沉积在铁素体相中 。 高强度热轧钢板的拉伸强度为980MPa以上,加工性和韧性优异。 高强度热轧钢板的表面可以具有热浸镀锌层,并含有一种或多种Mo,Nb和W.
    • 7. 发明专利
    • High strength hot-rolled steel sheet and manufacturing method therefor
    • 高强度热轧钢板及其制造方法
    • JP2012062525A
    • 2012-03-29
    • JP2010207483
    • 2010-09-16
    • Jfe Steel CorpJfeスチール株式会社
    • YAMADA KATSUMIFUNAKAWA YOSHIMASA
    • C22C38/00C21D9/46C22C38/14
    • PROBLEM TO BE SOLVED: To provide an inexpensive high strength hot-rolled steel sheet, which is superior in extension and stretch-flange property and has the TS of 815-1000 MPa, and to provide a manufacturing method of the high strength hot-rolled steel sheet.SOLUTION: The high strength hot-rolled steel sheet has the composition which includes, by mass%, 0.07-0.10% C, ≤0.50% Si+Al, 1.0-1.5% Mn, 0.060-0.200% P, 0.0020-0.0045% N, 0.010-0.02% Ti, and 0.23-0.60% V and in which the balance comprises Fe and inevitable impurities, and has a microstructure which is a ferritic single phase and in which VC of 10 nm or less in size is precipitated in the ferritic phase; wherein the size of the VC, in the square-platy VC observed from [001] orientation of the ferritic phase as the matrix with a transmission electron-microscope, is the value of the arithmetic means by obtaining the size of the VC shown with 2×L (L: length at one side of a square plate) for a plurality of VCs.
    • 解决的问题:为了提供一种廉价的伸长率和拉伸凸缘性优异的高强度热轧钢板,其TS为815-1000MPa,并且提供高强度的制造方法 热轧钢板。 解决方案:高强度热轧钢板的组成按质量%计含有0.07-0.10%C,≤0.50%Si + Al,1.0-1.5%Mn,0.060-0.200%P,0.0020- 0.0045%N,0.010-0.02%Ti和0.23-0.60%V,其中余量包含Fe和不可避免的杂质,并且具有铁素体单相的微观结构,其中大小为10nm以下的VC析出 在铁素体相中 其中,通过透射电子显微镜从作为基质的铁素体相的[001]取向观察到的方板VC中的VC的尺寸是通过获得用2表示的VC的尺寸的算术装置的值 对于多个VC, 1/2 ×L(L:方板一侧的长度)。 版权所有(C)2012,JPO&INPIT
    • 8. 发明专利
    • LOW-CARBON MARTENSITIC Cr-CONTAINING STEEL SUPERIOR IN HEAT RESISTANCE
    • 低碳马氏体含Cr耐高温钢
    • JP2011006717A
    • 2011-01-13
    • JP2009148474
    • 2009-06-23
    • Jfe Steel CorpJfeスチール株式会社
    • ISHIDA TOMOHARUYAMADA KATSUMIMAKIISHI NORIKOYAMASHITA TAKAKOHAMADA ETSUOYAMAUCHI KATSUHISAKATO YASUSHIUGI TAKUMI
    • C22C38/00C21D9/00C21D9/46C22C38/58F16D65/12
    • PROBLEM TO BE SOLVED: To provide a raw material for a brake disk which has such temper softening resistance as to be capable of keeping appropriate hardness HRC of 30 or more even after having been tempered at 700°C for one hour.SOLUTION: A low-carbon martensitic Cr-containing steel superior in heat resistance comprises, by mass%, 0.02-0.10% C, 0.02-0.10% N, 0.08-0.16% C+N, 0.5% or less Si, 0.1% or less Al, 0.3-3.0% Mn, 10.5-13.5% Cr, 0.05-0.60% Nb, 0.15-0.80% V, 0.25-0.95% Nb+V, 0.02-2.0% Ni and the balance Fe with unavoidable impurities; has such a value of an expression of an Fp value as to be 80.0-96.0; and has such a value of [N]-[N'] after having been tempered at 700°C for one hour as to be 0.057 mass% or more, where an amount of nitrogen contained in the steel is represented by [N] and an amount of nitrogen in a precipitating state quantified by using a bromine-methanol mixture solution is represented by [N'].
    • 要解决的问题:为了提供具有这种回火软化性的制动盘的原料,即使在700℃回火1小时之后,即使在700℃回火1小时后,也能够使适当的硬度HRC为30以上。解决方案:低 耐热性优异的含碳马氏体系Cr的钢中,以质量%计含有0.02〜0.10%的C,0.02〜0.10%的N,0.08〜0.16%的C + N,0.5%以下的Si,0.1%以下的Al,0.3 -3.0%Mn,10.5-13.5%Cr,0.05-0.60%Nb,0.15-0.80%V,0.25-0.95%Nb + V,0.02-2.0%Ni,余量为Fe和不可避免的杂质; 具有Fp值的表达式的值为80.0-96.0; 并且在700℃回火1小时后具有[N] - [N']的值为0.057质量%以上,其中,钢中含有的氮的量由[N]表示, 通过使用溴 - 甲醇混合溶液定量的沉淀状态的氮的量由[N']表示。
    • 9. 发明专利
    • Method for analyzing deposit and/or inclusion in metal material
    • 用于分析沉积物和/或包含在金属材料中的方法
    • JP2010151695A
    • 2010-07-08
    • JP2008331645
    • 2008-12-26
    • Jfe Steel CorpJfeスチール株式会社
    • ISHIDA TOMOHARUJODAI TETSUSHIYAMADA KATSUMINAKAMURA TETSUYUKI
    • G01N33/20G01N1/10G01N1/28G01N21/73
    • PROBLEM TO BE SOLVED: To provide an analytical method capable of separating deposits etc. (especially of a size of 1 μm or below) present in a metal sample without any loss and accurately analyzing the deposits etc. for every size. SOLUTION: (1) The metal sample is electrolyzed. (2) A deposit and/or an inclusion adhering to a remaining part of the metal sample after electrolyzation and a deposit and/or an inclusion contained in an electrolytic solution after the electrolyzation are both filtered out and collected. (3) Filtered and collected deposits and/or inclusions are immersed in a solution having dispersiveness and separated into the dispersive solution. (4) The deposits and/or inclusions separated into the dispersive solution are analyzed. In (2), the deposit and or the inclusion adhering to the remaining part of the metal sample after the electrolyzation are immersed in a solution for collection and separated into the solution for collection, and the solution for collection is filtered by a filter A for collection. The electrolytic solution after the electrolyzation is filtered by a filter B for collection. In (3), the filter A for collection and the filter B for collection are immersed in the solution having dispersiveness. COPYRIGHT: (C)2010,JPO&INPIT
    • 要解决的问题:提供一种能够分离金属样品中存在的沉积物等(特别是1μm以下)的分​​析方法,没有任何损失,并且能够准确地分析每种尺寸的沉积物等。 解决方案:(1)电解金属样品。 (2)电解后的金属试样的剩余部分和沉积物和/或包含在电解液中的电解液中的夹杂物的沉积物和/或夹杂物均被滤出并收集。 (3)将过滤收集的沉积物和/或夹杂物浸渍在具有分散性的溶液中并分离成分散溶液。 (4)分析分离成分散溶液的沉积物和/或夹杂物。 在(2)中,在电解后将附着在金属样品的剩余部分的沉积物或包含物浸渍在收集溶液中并分离成溶液以进行收集,并将用于收集的溶液用过滤器A过滤 采集。 电解后的电解液用过滤器B过滤,收集。 在(3)中,将用于收集的过滤器A和用于收集的过滤器B浸入具有分散性的溶液中。 版权所有(C)2010,JPO&INPIT