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汽车拖拉机用渗碳钢 | 2012-3-8 10:10:00

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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Re:在漫画中识别身边的违章 | 2016-10-23 13:24:12
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Re:在漫画中识别身边的违章 | 2016-10-22 15:29:33
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Re:在漫画中识别身边的违章 | 2016-10-19 22:39:57
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Re:在漫画中识别身边的违章 | 2016-10-19 13:28:27
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Re:在漫画中识别身边的违章 | 2016-10-17 2:33:12
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Re:在漫画中识别身边的违章 | 2016-10-13 6:26:52
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Re:在漫画中识别身边的违章 | 2016-10-12 12:21:14
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Re:在漫画中识别身边的违章 | 2016-10-11 2:55:27
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By:shmor(游客) | 个人主页 | 引用 | 返回 | 删除 | 回复
原创 | 2016-9-30 15:52:13
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原创 | 2016-9-28 21:09:16
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Re:在漫画中识别身边的违章 | 2016-9-13 12:49:36
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By:jfwzd(游客) | 个人主页 | 引用 | 返回 | 删除 | 回复
原创 | 2016-9-6 21:34:56
原创(游客)http://njryw2016.lofter.com/post/1e59a72f_c3b5ed7 http://njryw2016.lofter.com/post/1e59a72f_c3b5ed6 http://njryw2016.lofter.com/post/1e59a72f_c3b5ed5 http://njryw2016.lofter.com/post/1e59a72f_c3b5ed4 http://njryw2016.lofter.com/post/1e59a72f_c3b5ed3 http://njryw2016.lofter.com/post/1e59a72f_c3b5ed2 http://njryw2016.lofter.com/post/1e59a72f_c3b5ed1 http://njryw2016.lofter.com/post/1e59a72f_c3b5ed0 http://njryw2016.lofter.com/post/1e59a72f_c3b5ecf http://njryw2016.lofter.com/post/1e59a72f_c3b5ece
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