| Q345R????????????????????? |
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| 引用本文： | 刘阳春,郭慧敏.Q345R?????????????????????[J].物理测试,2015,33(2):31-34. |
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| 作者姓名： | 刘阳春 郭慧敏 |
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| 作者单位： | ???????о???????о????????? 100043 |
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| 摘 要： | 对伸长率不合格Q345R热轧板卷进行了分析。结果表明:部分Q345R钢热轧板卷伸长率不合格的主要原因是钢中出现较多的Mn S和Al2O3夹杂物;热轧板卷的显微组织沿厚度方向不均匀,上表面一侧出现大量的贝氏体+魏氏体组织,心部至下表面一侧仍以铁素体+珠光体组织为主。存在带状组织不是导致伸长率不合格的原因。
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| 关 键 词： | ????????ˉ?????????????Q345R??????????????????? |
Cause analysis on unqualified elongation of Q345R hot-rolled coil |
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| LIU Yang-chun,GUO Hui-min.Cause analysis on unqualified elongation of Q345R hot-rolled coil[J].Physics Examination and Testing,2015,33(2):31-34. |
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| Authors: | LIU Yang-chun GUO Hui-min |
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| Affiliation: | Department of Thin Plate Research,Shougang Technology Research Institute, Beijing 100043, China |
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| Abstract: | Q345R hot-rolled coil with unqualified elongation was analyzed. The results showed that the elongation of Q345R hot-rolled coil was unqualified due to the pretty much amount of MnS and Al2O3 inclusion existing in steel; and the micro-structure of hot-rolled coil was asymmetrical along with the direction of thickness, with large amount of bainite + widmanstatten structure in upper side and majorly ferrite + pearlite structure from center to lower side of the strip. Thus, the banded structure of coil was not the reason for elongation disqualification. |
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| Keywords: | Key words: steel for boilers and pressure vessels Q345R hot-rolled strip elongation disqualification |
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