HIGH-STRENGTH SPRING STEEL HAVING EXCELLENT WIRE-ROD ROLLING PROPERTIES
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    发明申请
    HIGH-STRENGTH SPRING STEEL HAVING EXCELLENT WIRE-ROD ROLLING PROPERTIES 审中-公开
    具有优异线径滚动特性的高强度弹簧钢

    公开(公告)号:US20160097113A1

    公开(公告)日:2016-04-07

    申请号:US14874671

    申请日:2015-10-05

    摘要: The present invention relates to a high-strength spring steel having excellent wire-rod rolling properties, consisting essentially of, in terms of mass %: C: 0.40% to 0.65%; Si: 1.20% to 2.80%; Mn: 0.30% to 1.20%; P: 0.020% or less; S: 0.020% or less; Cu: 0.40% or less; Ni: 0.80% or less; Cr: 0.70% or less; Ti: 0.060% to 0.140%; Al: 0.10% or less; N: 0.010% or less; and O: 0.0015% or less, and optionally: B: 0.0005% to 0.0050%, with the remainder being Fe and inevitable impurities, in which the contents in terms of mass % of the specified chemical components satisfy the following Expressions (1) to (3): X1=0.14×[Si]−0.11×[Mn]−0.05×[Cu]−0.11×[Ni]−0.03×[Cr]+0.02≦0.2   Expression (1) X2=(α−500)/β≧3.0   Expression (2) α=912−231×[C]+32×[Si]−20×[Mn]−40×[Cu]−18×[Ni]−15×[Cr] β=10̂(0.322−0.538×[C]+0.018×[Si]+1.294×[Mn]+0.693×[Cu]+0.609×[Ni]+0.847×[Cr]) X3=31×[C]+2.3×[Si]+2.3×[Mn]+1.25×[Cu]+2.68×[Ni]+3.57×[Cr]−6×[Ti]≧24.0   Expression (3).

    摘要翻译: 本发明涉及一种具有优异的线棒轧制性能的高强度弹簧钢,其质量基本上由以下组成:质量%:C:0.40%至0.65%; Si:1.20%〜2.80%; Mn:0.30〜1.20% P:0.020%以下; S:0.020%以下; Cu:0.40%以下; Ni:0.80%以下; Cr:0.70%以下; Ti:0.060〜0.140% Al:0.10%以下; N:0.010%以下; 和O:0.0015%以下,任选:B:0.0005〜0.0050%,余量为Fe和不可避免的杂质,其中指定化学成分的质量%含量满足下列表达式(1)〜 (3):X1 = 0.14×[Si] -0.11×[Mn] -0.05×[Cu] -0.11×[Ni] -0.03×[Cr] + 0.02≦̸ 0.2表达式(1)X2 =(α-500 )/&bgr;≥3.0表达式(2)α= 912-231×[C] + 32×[Si] -20×[Mn] -40×[Cu] -18×[Ni] -15×[Cr] ; = 10(0.322-0.538×[C] + 0.018×[Si] + 1.294×[Mn] + 0.693×[Cu] +0.609×[Ni] + 0.847×[Cr])X3 = 31×[C] + 2.3×[Si] + 2.3×[Mn] + 1.25×[Cu] + 2.68×[Ni] + 3.57×[Cr] -6×[Ti]≥24.0表达式(3)。