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汽车拖拉机用渗碳钢 | 2012-3-2 10:47:00
汽车拖拉机用渗碳钢
钢的含碳量低,一般在0.10~0.23%最适合,最高应≦0.30%应选择本质细晶粒钢,经渗碳后可直接淬火、低温回火。可得细回火马氏体组织。一般要求渗碳层中碳的浓度梯度和缓,碳含量最好在0.8~1.0%范围内。常用渗碳钢钢号和用途如20、30、20Mn,制造凸轮轴、杠杆轴和传动被动齿轮;15Cr、20Cr、20CrMnTi,制造万向节+字轴和各种齿轮;30CrMnTi、20CrMnMo、20MnVB,制造大截面齿轮。
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