镁处理对钢中非金属夹杂物的控制效果  

Control performance of nonmetallic inclusion in molten steel using Mg-treatment

作　　者：吕铭[1,2] 王博[2] 王德永[1] 张同生[1] 姜茂发[1] 

机构地区：[1]东北大学材料与冶金学院,辽宁沈阳110004 [2]山钢集团莱芜钢铁集团有限公司,山东莱芜271104

出　　处：《炼钢》2014年第5期1-4,共4页Steelmaking

摘　　要：摘要：以热力学计算为基础，在120t钢包内进行了镁处理工业试验。结果表明采用缓释含镁包芯线技术可以实现镁合金的平稳喂人。检测到钢中ω（T．Mg）=0．0010％～0．0016％。喂线过程中无钢水增氮趋势，T．O含量降低显著，降低幅度约50％，钢水洁净度明显提高。镁处理后，SPHC钢中夹杂物由氧化铝转变为镁铝尖晶石或纯的氧化镁，尺寸从3～5／μm降至1～2／μm，夹杂物中镁含量与镁合金喂入量呈较好的对应关系。On thebasis of thermodynamic calculations, Mg-treatment experiments were carried out in 120 t ladle. The results showed that the slow-release cored wires containing magnesium can be injected smoothly into molten steel. Total magnesium mass fraction in molten steel was measured in the range of 0. 001 0% - 0. 001 6 %. During the process, nitrogen pick-up was not found. However total oxygen mass fraction was decreased 50 %, also cleanliness of steel was improved. After Mg- treatment, inclusions in SPHC steel changed from A1203 to spinel or pure MgO, and the size decreased from 3-5μm to 1-2μm. The magnesium mass fraction in inclusions presented a good correspondence with addition of magnesium alloy.

关 键 词：镁处理 铝镇静钢 夹杂物 洁净度 

分 类 号：TF713.5[冶金工程—钢铁冶金]