B级钢中频感应熔炼用镁砂坩埚的失效与防护  

Failure and Protection of Magnesia Crucible Used in the Medium-frequency Induce Furnace for B Grade Steel Melting

作　　者：肖黎明[1] 张励忠[1] 张密兰[1] 胡远猛[1] 李海开[1] 韩淑霞[1] 

机构地区：[1]北京交通大学机械与电子控制工程学院,北京100044

出　　处：《铸造技术》2006年第3期201-204,共4页Foundry Technology

基　　金：北京交通大学"十五"重大科研基金项目(230-12)

摘　　要：根据B级钢中频感应熔炼过程中镁砂坩埚的工作环境特点,指出坩埚失效的主要形式:热应力开裂、侵蚀变薄、表层剥落、钢液渗透、表面结渣等,并对其失效机理进行分析。通过调整镁砂的颗粒级配,采用多相复合技术,在坩埚的特定区域使用特定坩埚材料的分区捣筑、合理安排烧结工艺、精心操作、精心修补。从而提高了坩埚使用寿命。According to the environment characteristics of magnesia crucible during melting B grade steel by medium-frequency induce furnace, the main failure forms of magnesia crucible, such as crack for thermalstress, thinning by corrosion, scaling of surface-layer, filtering of steel liquid, and slag-bonding on surface-layer, were pointed out and their failure machanism were analyzed. Through adjusting mixture ratio of grain-grades, adopting compound multiphase and sub-area tamping technique in special area in crucible, arranging the technique of crucible sintering and operating, repairing carefully,so that the service life of crucible is improved.

关 键 词：B级钢 中频感应 镁砂坩埚 失效分析 防护对策 

分 类 号：TG243[金属学及工艺—铸造]