发明名称 HIGH-STRENGTH STEEL SHEET HAVING EXCELLENT PROCESSABILITY AND PAINT BAKE HARDEN-ABILITY, AND METHOD FOR PRODUCING SAME
摘要 <p>The high-strength steel sheet includes, by mass%: C: 0.01% to 0.10%; Si: 0.15% or less; Mn: 0.80% to 1.80%; P: 0.10% or less; S: 0.015% or less; Al: 0.10% to 0.80%; Cr: 0.01% to 1.50%; N: 0.0100% or less; and a balance consisting of iron and inevitable impurities, in which a metallic structure is composed of ferrite and a hard second phase, the area fraction of the ferrite is 80% or more, the area fraction of the hard second phase is 1%) to 20%, the fraction of unrecrystallized ferrite in the ferrite is less than 10%, the ferrite grain sizes are 5 µm to 20 µm, and the fraction of the ferrite crystal grains having an aspect ratio of 1.2 or less in the entire ferrite crystal grains is 60% or more.</p>
申请公布号 KR101411228(B1) 申请公布日期 2014.06.23
申请号 KR20127011577 申请日期 2010.11.09
申请人 发明人
分类号 C21D9/46;C22C38/38;C22C38/58;C23C2/06 主分类号 C21D9/46
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