【作者】 杨树峰； 李京社； 林晓川； 姜桂连；

【Author】 YANG Shu-feng~1 LI Jing-she~1 LI Xiao-chuan~1 JIANG Gui-lian~2 (1.School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing, Beijing 100083,China;2.Steelmaking Plant,Tianjin Pipe Company Ltd.,Tianjin 300301,China)

【机构】 北京科技大学冶金与生态工程学院； 天津钢管集团有限公司炼钢厂；

【摘要】 本文研究了真空脱气(VD)精炼对气瓶钢30CrMo洁净度影响。在真空精炼过程中破真空取样来分析钢的成分和总氧含量,利用扫描电镜观察夹杂物的形貌,用显微镜统计显微夹杂物的数量,用大样电解分析大型夹杂物的含量。研究结果表明,真空脱气精炼过程中总氧含量先较小后增加,在真空脱气精炼12min左右,总氧含量即可达到较小值;真空脱气可以有效的减少了钢中显微夹杂物的数量但会增加大型夹杂物的含量。更多还原

【Abstract】 The Cleanliness of gas cylinder steel(30CrMo) was studied during vacuum degassing by interrupting vacuum after the start of operation.Steel samples were collected to analyze with respect to steel composition,total oxygen content,number and account of inclusions in the molten steel.The results showed the content of total oxygen increases firstly and decreases latter,and the total oxygen content seems to reach a minimum value after around 12 min of vacuum degassing.The vacuum degassing effectively reduces the number of inclusions in steel,but increases the amount ofmacro-inclusions.更多还原