| 77MnA盘条断裂原因分析 |
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| 引用本文： | 牛亚然,陈光,黄一新. 77MnA盘条断裂原因分析[J]. 装备环境工程, 2004, 22(1): 14-16 |
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| 作者姓名： | 牛亚然 陈光 黄一新 |
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| 作者单位： | 南京理工大学 江苏南京210094(牛亚然，陈光)，南京钢铁有限集团公司 江苏南京210035(黄一新) |
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| 摘 要： | 通过宏观观察,夹杂物评级和显微组织观察,分析了77MnA盘条拉拔过程中断裂的原因。实验结果表明:马氏体的出现和基体为索氏体、屈氏体和少量的贝氏体的混合组织是断裂的主要原因;基体组织为混合组织和马氏体的出现是由于轧件出精轧机组进斯太尔摩控制冷却线时冷却温度过低造成的;同一直径钢丝心部的马氏体含量相对边部的马氏体含量多表明存在C、Mn、Cr元素的偏析,并提出改进措施。
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| 关 键 词： | 预应力盘条 控制冷却 偏析 |
| 文章编号： | 1000-8446(2004)01-0014-03 |
| 修稿时间： | 2003-09-10 |
Fracture Analysis of 77MnA Wire Rods |
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| NIU Ya-ran,CHEN Guang,HUANG Yi-xin. Fracture Analysis of 77MnA Wire Rods[J]. Equipment Environmental Engineering, 2004, 22(1): 14-16 |
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| Authors: | NIU Ya-ran CHEN Guang HUANG Yi-xin |
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| Affiliation: | NIU Ya-ran~1,CHEN Guang~1,HUANG Yi-xin~2 |
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| Abstract: | Through macrostructure and microstructure observing, impurity assessment,this paper analysed the fracture reason of 77MnA rods in cold drawing. It is showed: the formation of martensite and mixture of sorbide, troostite and bainite which is caused by the low temperature at the beginning of cooling control is the main reason of fracture; and the quantity of martensite in center is more than that of side testify that there is segregation of C?Mn?Cr. Several methods are brought forward. |
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| Keywords: | prestressed wire rod cooling control segregation |
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