50CrVA弹簧钢冶炼过程夹杂物演变行为
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- 英文论文题名：Evolution behavior of inclusions in refining process of 50CrVA spring steel
- 论文作者：王勇 ; 唐海燕 ; 吴拓 ; 李京社
- 英文论文作者：WANG Yong ; TANG Haiyan ; WU Tuo ; LI Jingshe ; School of Metallurgical and Ecological Engineering ; University of Science and Technology Beijing
- 年：2016
- 作者机构：北京科技大学冶金与生态工程学院;
- 论文关键词：50CrVA弹簧钢 ; 洁净度 ; 非金属夹杂物
- 英文论文关键词：50CrVA spring steel ; cleanliness ; non-metallic inclusions
- 会议召开时间：2016-05-19
- 会议录名称：第十九届（2016年）全国炼钢学术会议大会报告及论文摘要集
- 语种：中文
- 分类号：TF762.5
- 学会代码：ZGJS
- 会议名称：第十九届（2016年）全国炼钢学术会议
- 会议地点：中国湖南长沙
- 主办单位：中国金属学会炼钢分会
- 学会名称：中国金属学会
- 页数：1
- 文件大小：55k
- 原文格式：O
- 会议级别：全国
摘要
通过对国内某钢厂BOB-LF-CC工艺生产的50CrVA弹簧钢进行全流程连续取样,综合分析了冶炼过程中非金属夹杂物的变化规律。研究结果表明:精炼开始时钢中夹杂物以SiO_2-A_l2O_3-MnO-TiO_2类型为主,精炼结束夹杂物转变为CaO-Al_2O_3-SiO_2-(MgO)类型:铸坯中夹杂物主要为CaO-Al_2O_3-MgO和CaO-Al_2O_3-SiO_2复合氧化物夹杂,其中Al_2O_3含量较高,达60%-70%,没有得到低熔点夹杂物。热力学计算表明为使夹杂物充分转变为低熔点,需控制钢液中的钙含量在15ppm左右。实践中可通过提高炉渣碱度或喂入适量钙线实现。
The evolution of non-metallic inclusions in 50 CrVA spring steel produced by BOF-LF-CC process was studied by the method of continuous sampling in different stages.The results show that SiO_2-Al_2O_3-MnO-TiO_2 system inclusion is the main type at the beginning of LF refining,and it transforms into CaO-Al_2O_3-Si02-(MgO) system inclusion at LF-end.CaO-MgO-Al_2O_3 and CaO-Al_2O_3-SiO_2 composite oxide inclusions are the main types in billets,in which the content of Al_2O_3 accounts for 60%-70%,and no low melting inclusion is obtained.Thermodynamic calculation show that calcium content should be controlled to approximately15 ppm to modify inclusions into low melting point,which can be achieved by the means of improving slag basicity and/or feeding the proper amount of Ca wire
The evolution of non-metallic inclusions in 50 CrVA spring steel produced by BOF-LF-CC process was studied by the method of continuous sampling in different stages.The results show that SiO_2-Al_2O_3-MnO-TiO_2 system inclusion is the main type at the beginning of LF refining,and it transforms into CaO-Al_2O_3-Si02-(MgO) system inclusion at LF-end.CaO-MgO-Al_2O_3 and CaO-Al_2O_3-SiO_2 composite oxide inclusions are the main types in billets,in which the content of Al_2O_3 accounts for 60%-70%,and no low melting inclusion is obtained.Thermodynamic calculation show that calcium content should be controlled to approximately15 ppm to modify inclusions into low melting point,which can be achieved by the means of improving slag basicity and/or feeding the proper amount of Ca wire
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