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| 齿轮钢中非金属夹杂物控制技术研究 | |
| 引用本文： | 赵克文,王新华,李海波,王郢,陈天明. 齿轮钢中非金属夹杂物控制技术研究[J]. 钢铁钒钛, 2009, 30(3): 38-43 |
| 作者姓名： | 赵克文 王新华 李海波 王郢 陈天明 |
| 作者单位： | 1. 北京科技大学冶金与生态学院,北京,100083;攀枝花钢铁,集团,公司,四川,攀枝花,617067 2. 北京科技大学冶金与生态学院,北京,100083 3. 攀枝花钢铁,集团,公司,四川,攀枝花,617067 |
| 摘 要： | 为了降低钢的T[O]含量和生成较低熔点的非金属夹杂物以改善合金结构钢的抗疲劳破坏性能,在炉外精炼中采用了高碱度和高Al2O3含量的渣系.研究发现LF和RH精炼结束时钢液T[O]含量均随炉渣碱度增加而降低,在炉渣Al2O3含量低于25%时,T[O]随炉渣Al2O3含量减少而降低,而当炉渣Al2O3超过25%后,T[O]则随炉渣Al2O3含量增加而降低.精炼过程钢液中夹杂物按"Al2O3系夹杂物→MgO-Al2O3系夹杂物→CaO-MgO-Al2O3系夹杂物"顺序发生转变,其中MgO-Al2O3系夹杂物向CaO-MgO-Al2O3系夹杂物的转变是由外向内逐步进行的,转变速度相对较慢,因而致使LF结束时钢中仍存在许多尚未转变的Mgo-Al2O3系夹杂物.钢液T[O]对夹杂物转变有显著影响,降低T[O]含量有利于生成较低熔点的CaO-MgO-Al2O3系夹杂物. |
| 关 键 词： | 合金结构钢 炉外精炼 炉渣 非金属夹杂物 熔点 |
Change of the Non-metallic Inclusions during the Secondary Refining of Low Oxygen Alloyed Structural Steels |
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| Zhao Kewen,Wang Xinhua,Li Haibo,Wang Ying,Chen Tianming. Change of the Non-metallic Inclusions during the Secondary Refining of Low Oxygen Alloyed Structural Steels[J]. Iron Steel Vanadium Titanium, 2009, 30(3): 38-43 | |
| Authors: | Zhao Kewen Wang Xinhua Li Haibo Wang Ying Chen Tianming |
| Affiliation: | 1.School of Metallurgical and Ecological Engineering;University of Science and Technology Beijing;Beijing 100083;China;2.Panzhihua Iron and Steel Corporation;Panzhihua 617067;Sichuan;China |
| Abstract: | Slag of high basicity and high Al2O3 content was used in secondary refining of alloyed structural steels aiming at decreasing total oxygen contents(T[O]) of steel and forming relatively lower melting point inclusions to improve the anti-fatigue properties of the steels.It was found that T[O] at the end of LF and RH refining both decreased with the increase of slag basicity.When Al2O3 in the slag was less than 25%,T[O] decreased with the decrease of Al2O3 content of slag.While,when Al2O3 in the slag was more... |
| Keywords: | alloyed structural steel secondary refining slag non-metallic inclusions melting point |
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