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    • 35. 发明申请
    • Steel sheet for dissimilar materials weldbonding to aluminum material and dissimilar materials bonded body
    • 用于不同材料的钢板焊接到铝材料和异种材料粘结体
    • US20060275623A1
    • 2006-12-07
    • US11436703
    • 2006-05-19
    • Mikako TakedaWataru UrushiharaKatsushi MatsumotoJun Katoh
    • Mikako TakedaWataru UrushiharaKatsushi MatsumotoJun Katoh
    • C22C38/00B32B15/10
    • C22C21/06B23K35/0261B23K35/286B32B15/012C21D9/46C22C21/02C22C21/08C22C38/02C22C38/04C22C38/12C22C38/22C22C38/26C22C38/28C22C38/34Y10T428/12472Y10T428/12757
    • Disclosed is a steel sheet for dissimilar materials weldbonding to an aluminum material, the steel sheet containing, in mass, C: 0.02 to 0.3%, Si: 0.2 to 5.0%, Mn: 0.2 to 2.0%, and Al: 0.002 to 0.1%, further one or more of Ti: 0.005 to 0.10%, Nb: 0.005 to 0.10%, Cr: 0.05 to 1.0%, and Mo: 0.01 to 1.0%, and the balance consisting of Fe and unavoidable impurities. In the steel sheet, (i) the proportion of the oxide containing Mn and Si by 1 at. % or more in total in the external oxide layer which is newly formed after an original oxide layer having already existed on the surface of the steel sheet is once removed and now exists on the surface of the base steel material of the steel sheet is 50 to 80% in terms of the average proportion of the total length of the oxide to 1 μm length of the interface between the base steel material and the external oxide layer nearly in the horizontal direction, (ii) the proportion of the internal oxide, including oxide at the grain boundary, which exists in the steel region up to the depth of 10 μm from the surface of said base steel material of said steel sheet and contains Mn and Si by 1 at. % or more in total is 3% or more to less than 10% in terms of the average area percentage of said internal oxide in the visual field of 10 μm2 of said steel region, (iii) the proportion of the internal oxide, including oxide at the grain boundary, which exists in the steel region exceeding 10 μm in depth from the surface of said base steel material of said steel sheet and contains Mn and Si by 1 at. % or more in total is 0.1% or less in terms of the average area percentage of said internal oxide in the visual field of 10 μm2 of said steel region.
    • 公开了一种用于与铝材料焊接的不同材料的钢板,该钢板以质量计含有C:0.02〜0.3%,Si:0.2〜5.0%,Mn:0.2〜2.0%,Al:0.002〜0.1% ,进一步Ti:0.005〜0.10%,Nb:0.005〜0.10%,Cr:0.05〜1.0%,Mo:0.01〜1.0%,余量由Fe和不可避免的杂质组成。 在钢板中,(i)含有Mn和Si的氧化物的比例为1at。 在钢板表面已经存在的原始氧化物层被一次除去之后新形成的外部氧化物层中,总共存在%以上,现在存在于钢板的基体钢材的表面上,为50〜 以基本钢材和外部氧化物层之间的界面几乎在水平方向上的氧化物总长度与1mm长度的平均比例为80%,(ii)内部氧化物(包括氧化物)的比例 在与所述钢板的所述基体钢材的表面直径相距10μm的钢区域存在的晶界,其含有Mn和Si为1at。 (iii)所述钢区域的10mm 2的视野内的所述内部氧化物的平均面积百分比为3%以上至小于10%,(iii) 内部氧化物,包括在所述钢板的所述基体钢材表面上存在于钢区域内的深度超过10μm的晶界处的氧化物,并且含有Mn和Si为1at。 所述钢区域的10mum 2视野内的所述内部氧化物的平均面积百分比,总计为0.1%以下。