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<span style="margin: 0px; padding: 0px; outline: 0px; font-size: 14px; font-family: arial, sans-serif; line-height: 28px;">45号钢:</span></p>
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<span style="margin: 0px; padding: 0px; outline: 0px; font-size: 14px; font-family: arial, sans-serif; line-height: 28px;">含碳(C)量是0.42~0.50%,Si(硅)含量为0.17~0.37%,Mn(锰)含量0.50~0.80%,Cr(铬)含量≤0.25%,Ni(镍)含量≤0.30%, Cu(铜)含量≤0.25%。</span></p>
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推荐热处理温度:正火850,淬火840,回火600.</p>
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45号钢为优质碳素结构用钢,硬度不高易切削加工,模具中常用来做<img src="http://i4.qhimg.com/dr/200__/t018c95ebbbcc88a3a8.jpg" style="margin: 0px; padding: 0px; outline: 0px; border: none;" />模板,梢子,导柱等,但须热处理。</p>
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1. 45号钢淬火后没有回火之前,硬度大于HRC55(最高可达HRC62)为合格。</p>
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实际应用的最高硬度为HRC55(高频淬火HRC58)。</p>
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2.45号钢不要采用渗碳淬火的热处理工艺。</p>
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调质处理后零件具有良好的综合机械性能,广泛应用于摩托车、汽车上,特别是那些在交变负荷下工作的连杆、螺栓、齿轮及轴类等,在工作中要承受巨大的摩擦力,通常采用淬火的方法来提高自身的硬度、耐磨性和使用寿命。</p>
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<span style="margin: 0px; padding: 0px; outline: 0px; font-size: 14px; color: rgb(0, 0, 0); font-family: arial, sans-serif; line-height: 28px;">正火:850 ; 淬火:840 ; 回火:600 ; 抗拉强度:不小于600Mpa ; 屈服强度:不小于355Mpa ; 伸长率:16% ; 收缩率:40% ; 冲击功:39J ; 钢材交货状态硬度:不大于 未热处理:229HBS ; 退火钢:197HBS </span></p>