| 电脉冲改善HRB335钢宏观凝固组织的作用 |
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| 引用本文： | 李玲珍,宗燕兵,崔衡,宋军涛,张荣,苍大强.电脉冲改善HRB335钢宏观凝固组织的作用[J].北京科技大学学报,2004,26(5):478-481. |
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| 作者姓名： | 李玲珍 宗燕兵 崔衡 宋军涛 张荣 苍大强 |
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| 作者单位： | 北京科技大学冶金与生态工程学院,北京,100083 |
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| 摘 要： | 采用正交实验方法对hRB335钢进行电脉冲处理.考虑了最大脉冲电流、频率和处理时间的搭配作用,得出实验条件下的最佳参数范围.通过和前人结果的分析比较得出电脉冲效果可能与钢种无关的初步结论,以及对树枝晶打断理论的不同观点,指出实验过程中液面波动现象是金属中溶入了过多的氧所致.
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| 关 键 词： | 脉冲电流 HRB335钢 宏观组织 电脉冲 改善 凝固组织 作用 Steel Solidification Structure Macro 金属 波动现象 液面 实验过程 理论 树枝晶 初步结论 效果 比较 分析 结果 范围 参数 |
| 修稿时间： | 2004年2月20日 |
Electropulse Effect on Macro Solidification Structure of HRB335 Steel |
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| LI Lingzhen,ZONG Yanbing,CUI Heng,SONG Juntao,ZHANG Rong,CANG Daqiang
Metallurgical and Ecological Engineering School,University of Science and Technology Beijing,Beijing ,China.Electropulse Effect on Macro Solidification Structure of HRB335 Steel[J].Journal of University of Science and Technology Beijing,2004,26(5):478-481. |
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| Authors: | LI Lingzhen ZONG Yanbing CUI Heng SONG Juntao ZHANG Rong CANG Daqiang
Metallurgical and Ecological Engineering School University of Science and Technology Beijing Beijing China |
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| Institution: | LI Lingzhen,ZONG Yanbing,CUI Heng,SONG Juntao,ZHANG Rong,CANG Daqiang
Metallurgical and Ecological Engineering School,University of Science and Technology Beijing,Beijing 100083,China |
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| Abstract: | In the experiment HRB335 steel was treated by impulse current, and the maximum current, frequency and processing time were considered together. The optimal result is the following: the current density is 0.021-0.025 A/mm2, the frequency is 1 Hz and the processing time is 30 s or so. The maximum equiaxal crystal ratio is up to 95% and the crystals are obviously refined. Compared with others' discoverits the primary inclusion was made that electropulse effect may be independent of steel species. Different opinions about the columnar crystal broken theory were proposed. It is considered that liquid level fluctuation phenomena are for too much oxygen is dissolved into the metal. |
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| Keywords: | electropulse current HRB335 steel macro structure |
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