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    • 1. 发明专利
    • High-strength cold rolled steel sheet having excellent formability and corrosion resistance after coating and its production method
    • 高强度冷轧钢板,其涂层及其生产方法具有优异的耐磨性和耐腐蚀性
    • JP2007126747A
    • 2007-05-24
    • JP2006274863
    • 2006-10-06
    • Jfe Steel KkJfeスチール株式会社
    • NISHIYAMA NAOKISUGIHARA REIKOSHIMIZU TETSUOTAKAGI SHUSAKUYASUHARA HIDEKOHAMADA ETSUO
    • C22C38/00C21D9/46C22C38/06C22C38/14
    • C23G1/085C23G1/08
    • PROBLEM TO BE SOLVED: To provide a high-strength cold rolled steel sheet whose tensile strength is ≥590 MPa, and which has excellent formability, and also has excellent corrosion resistance after coating even in severe environments such as a salt warm water test and a composite corrosion cycle test, and to provide its production method. SOLUTION: The high-strength cold rolled steel sheet has a composition comprising, by mass, 0.05 to 0.25% C, 0.8 to 3.0% Si, 0.5 to 3.0% Mn, ≤0.05% P, ≤0.01% S and ≤0.06% Al, and the balance Fe with inevitable impurities, and has a structure comprising, by volume, ≥30% ferrite, ≥2% retained austenite, bainite and/or martensite of 3 to 50% in total, and in which the Si content Cs(Si) in the surface of the steel sheet defined by the following formula is ≤2.5%, and an S compound in which the Si content is 0.1 to 100 mg/m 2 is present in the surface of the steel sheet: Cs(Si)=Cb(Si)×[Rs(Si/Fe)/Rb(Si/Fe)]; wherein, Cb(Si) is the Si content in the steel; Rs(Si/Fe) is a GDS (Glow Discharge Spectroscopy) count integrated value ratio between Si and Fe from the surface to a depth of 50 nm; and Rb(Si/Fe) is a GDS count ratio between Si and Fe in the steel. COPYRIGHT: (C)2007,JPO&INPIT
    • 要解决的问题:提供拉伸强度≥590MPa,成型性优异的高强度冷轧钢板,即使在严酷的环境例如盐温水中也具有优异的耐腐蚀性 测试和复合腐蚀循环试验,并提供其生产方法。 解决方案:高强度冷轧钢板具有质量为0.05〜0.25%,Si:0.8〜3.0%,Mn:0.5〜3.0%,≤0.05%P,≤0.01%S和≤ 0.06%Al,余量为Fe与不可避免的杂质,并且具有体积比≥30%的铁素体,≥2%的残余奥氏体,贝氏体和/或马氏体总计为3〜50%的结构,其中Si 由下式定义的钢板表面的含量Cs(Si)≤2.5%,Si含量为0.1〜100mg / m 2的SP化合物存在于 钢板表面:Cs(Si)= Cb(Si)×[Rs(Si / Fe)/ Rb(Si / Fe)]; 其中,Cb(Si)是钢中的Si含量; Rs(Si / Fe)是从表面到深度为50nm的Si和Fe之间的GDS(辉光放电光谱)计数积分值比; 并且Rb(Si / Fe)是钢中Si和Fe之间的GDS计数比。 版权所有(C)2007,JPO&INPIT
    • 2. 发明专利
    • Method for evaluating adhesion property of thin film, and method for manufacturing base having thin film on surface
    • 用于评价薄膜粘合性能的方法以及在表面上制造薄膜的方法
    • JP2005121467A
    • 2005-05-12
    • JP2003356317
    • 2003-10-16
    • Jfe Steel KkJfeスチール株式会社
    • NAGOSHI MASAYASUSATO KAORUKONO TAKASHIHAMADA ETSUO
    • G01N23/225G01N3/00
    • PROBLEM TO BE SOLVED: To provide a method for accurately and rapidly evaluating the adhesion properties of a thin film formed on the surface of a material.
      SOLUTION: The method for evaluating the adhesion properties of the thin film comprises a process for irradiating a sample surface having the thin film on the surface with electron rays with a specified acceleration voltage that is selected according to the film thickness for measuring the number of secondary electrons (1); a process for testing the peeling of the sample (2); a process for irradiating the sample surface after the peeling test with electron rays by the specified acceleration voltage for measuring the number of secondary electrons (3); a process for determining the difference between the measured value of the number of secondary electrons before testing peeling and that of the number of secondary electrons after testing the peeling (4); and a process for evaluating the adhesion properties of the thin film from the difference between the measured values of the number of secondary electrons before and after testing the peeling (5).
      COPYRIGHT: (C)2005,JPO&NCIPI
    • 要解决的问题:提供一种准确和快速地评估形成在材料表面上的薄膜的粘附性的方法。 解决方案:用于评价薄膜的粘附性的方法包括用表面上具有薄膜的样品表面照射具有根据用于测量的薄膜厚度的特定加速电压的电子射线的方法 二次电子数(1); 用于测试样品(2)的剥离的方法; 用剥离试验用电子射线照射样品表面,用于测定二次电子数(3)的规定加速电压的方法; 测定剥离之后的二次电子数的测定值与剥离后的二次电子数的差的测定方法(4)。 以及根据测试剥离之前和之后的二次电子数的测量值之间的差异来评估薄膜的粘附性的方法(5)。 版权所有(C)2005,JPO&NCIPI
    • 7. 发明专利
    • Surface-treated steel sheet excelling in oil wetting and spreading resistance
    • 表面处理钢板,润滑油和耐磨性
    • JP2009035758A
    • 2009-02-19
    • JP2007199065
    • 2007-07-31
    • Jfe Steel KkJfeスチール株式会社
    • OKAI KAZUHISAHAMADA ETSUOMATSUZAKI AKIRAANDO SATOSHI
    • C23C28/00B05D5/04B05D7/14
    • C23C28/025B05D5/00B05D7/14C23C28/00F16C33/10F16C33/12F16C2204/60H02K5/02H02K5/16
    • PROBLEM TO BE SOLVED: To provide a surface-treated steel sheet which is excellent in oil wetting and spreading resistance, and when used for a parts equipped with a bearing holder part, can effectively suppress exudation of lubricating oil causing shortage of lubricating oil at a bearing part.
      SOLUTION: The surface-treated steel sheet is characterized in that: a rustproof coating film surface (A) on at least one surface of the surface-treated steel sheet has an angle of contact with lubricant of ≥10°, wherein the lubricant has a kinematic viscosity of 51-69 mm
      2 /s at 40°C and a kinematic viscosity of 11.1-14.9 mm
      2 /s at 100°C (wherein the angle of contact is one exhibited at a steel sheet surface temperature of 30° in 30 seconds later than the formation of lubricant droplet on the surface of the rustproof coating film); and preferably, the rustproof coating film surface (A) after plastic working of the surface-treated steel sheet at an elongation ratio of 20% has the angle of contact with the lubricant of ≥10°; and more preferably, on the rustproof coating film surface (A) and the rustproof coating film surface (A) after plastic working of the surface-treated steel sheet at an elongation ratio of 20%, the cracking density is ≤200 pieces per 100 μm.
      COPYRIGHT: (C)2009,JPO&INPIT
    • 要解决的问题:为了提供油润湿性和耐扩散性优异的表面处理钢板,并且当用于具有轴承保持器部件的部件时,可以有效地抑制润滑油的渗出,从而导致润滑不足 油在轴承部分。 解决方案:表面处理钢板的特征在于:表面处理钢板的至少一个表面上的防锈涂膜表面(A)与润滑剂的接触角≥10°,其中 润滑剂在40℃下的运动粘度为51-69mm 2 / SP / s,在100℃下的运动粘度为11.1-14.9mm 2 / s(其中 接触角是在防锈涂膜表面上形成润滑剂液滴30秒后的钢板表面温度30°时显示的)。 优选在表面处理钢板以20%的伸长率进行塑性加工后的防锈涂膜表面(A)与润滑剂的接触角≥10°; 更优选在表面处理钢板以20%的伸长率进行塑性加工后的防锈涂膜表面(A)和防锈涂膜表面(A)上,裂化密度为每100微米200块 。 版权所有(C)2009,JPO&INPIT
    • 8. 发明专利
    • Observing device for scanning electron microscope
    • 用于扫描电子显微镜的观察装置
    • JP2007273402A
    • 2007-10-18
    • JP2006100374
    • 2006-03-31
    • Jfe Steel KkJfeスチール株式会社
    • HAMADA ETSUOMAKIISHI NORIKO
    • H01J37/20
    • PROBLEM TO BE SOLVED: To observe a contact point with an observed sample satisfactorily with a scanning electron microscope by using a contact substance in a reaction container to come in contact with the observed sample in the scanning microscope.
      SOLUTION: The observing device for the scanning electron microscope for observing a sample surface by bringing the sample 4 and a chemical substance into contact in the scanning electron microscope is provided with the reaction container 3 arranged at the upper part of the sample 4 to come in contact with the sample 4; an introducing/discharging mechanism 5 for introducing and discharging an optional contact substance into and from the reaction container 3; and a manipulator 2 for moving the reaction container to the upper part of the sample or removing it.
      COPYRIGHT: (C)2008,JPO&INPIT
    • 要解决的问题:通过在反应容器中使用接触物质在扫描显微镜中与观察到的样品接触,用扫描电子显微镜令人满意地观察观察到的样品的接触点。 解决方案:在扫描电子显微镜中通过使样品4和化学物质接触来观察样品表面的扫描电子显微镜的观察装置设置有布置在样品4的上部的反应容器3 与样品4接触; 用于将任选的接触物质引入和排出反应容器3的引入/排出机构5; 以及用于将反应容器移动到样品的上部或将其移除的操纵器2。 版权所有(C)2008,JPO&INPIT
    • 9. 发明专利
    • Method for producing hot dip galvanized steel sheet having excellent plating wettability and galvannealed steel sheet having excellent plating wettability and alloying controllability
    • 生产具有优异的镀层湿度的高品质镀锌钢板的方法和具有优异的镀层湿度和合金控制性的镀锌钢板
    • JP2007254798A
    • 2007-10-04
    • JP2006079069
    • 2006-03-22
    • Jfe Steel KkJfeスチール株式会社
    • HAMADA ETSUONORO HISATO
    • C23C2/02B24C1/08C22C38/00C22C38/04C22C38/14C23C2/06C23C2/28
    • PROBLEM TO BE SOLVED: To obtain a hot dip galvanized steel sheet having excellent plating wettability and a galvannealed steel sheet having excellent plating wettability and alloying controllability.
      SOLUTION: Before a high strength steel sheet is subjected to annealing before plating, fine particles are projected onto its surface. At that time, preferably, the average particle diameter of the fine particles is controlled to 10 to 300 μm, and, as the stock, a metal is used. Further, the fine particles are projected onto the surface of the steel sheet preferably at a projection velocity of 30 to 300 m/s, so as to be a coverage of ≥200%. By projecting the fine particles onto the surface of the steel sheet, a deformed layer is introduced into the surface layer of the steel sheet to a sufficient depth. Then, the deformed layer remains even after annealing, and is, for example, made into the active site of alloying reaction upon alloying treatment, so as to improve the alloying reaction.
      COPYRIGHT: (C)2008,JPO&INPIT
    • 要解决的问题:获得具有优异的电镀润湿性的热浸镀锌钢板和具有优异的电镀润湿性和合金化控制性的合金化热浸镀锌钢板。

      解决方案:在高强度钢板在电镀之前进行退火之前,细颗粒投影到其表面上。 此时,优选将微粒的平均粒径控制在10〜300μm,作为原料使用金属。 此外,微粒优选以30〜300m / s的投影速度投影到钢板的表面上,以覆盖≥200%。 通过将细颗粒投影到钢板的表面上,将变形层引入到钢板的表层中足够的深度。 然后,退火后变形层保持均匀,例如在合金化处理后成为合金化反应的活性部位,以改善合金化反应。 版权所有(C)2008,JPO&INPIT

    • 10. 发明专利
    • Alloyed hot dip galvanized steel sheet
    • 合金热镀锌钢板
    • JP2007154317A
    • 2007-06-21
    • JP2007034843
    • 2007-02-15
    • Jfe Steel KkJfeスチール株式会社
    • NAGOSHI MASAYASUHAMADA ETSUOOZAKI JUNICHISAKURAI MICHITAKA
    • C23C2/06C23C2/02
    • PROBLEM TO BE SOLVED: To provide an alloyed hot dip galvanized steel sheet in which the adhesion of a plating film is excellent.
      SOLUTION: In the alloyed hot dip galvanized steel sheet, a base steel sheet comprises one or more kinds selected from, by mass, 0.1 to 2.0% Si, 0.5 to 3.0% Mn and 0.01 to 0.15% P. At least a part of oxide containing one or more kinds of elements selected from Si, Mn and P present in the surface of the base steel sheet before plating is present in the plating film separately from the boundary of the plating film/the base steel sheet. The oxide containing one or more kinds selected from Si, Mn and P present in the plating film separately from the boundary of the plating film/the base steel sheet has a granular shape, and, in the granular oxide, the average length in a direction parallel to the grain boundary of the plating film/the base steel sheet is ≤500 nm.
      COPYRIGHT: (C)2007,JPO&INPIT
    • 要解决的问题:提供一种其中镀膜的粘附性优异的合金化热浸镀锌钢板。 解决方案:在合金化热浸镀锌钢板中,基材钢板包含选自质量比为0.1〜2.0%的Si,0.5〜3.0%的Mn和0.01〜0.15%的P的至少一种 存在于电镀前的基体钢板表面中存在的选自Si,Mn和P中的一种或多种元素的氧化物的一部分与镀膜/基材钢板的边界分开存在于镀膜中。 含有选自与镀膜/基体钢板的边界分开的镀膜中的选自Si,Mn和P中的一种或多种的氧化物具有颗粒形状,并且在颗粒状氧化物中,在方向上的平均长度 平行于电镀膜/基材钢板的晶界≤500nm。 版权所有(C)2007,JPO&INPIT