保护气氛电渣过程钢中增氮问题研究  

Investigation on nitrogen increase in steel in the process of electroslag remelting

作　　者：魏洁浩 张璨[1] 税烺 Wei Jiehao;Zhang Can;Shui Lang(Pangang Group Jiangyou Changcheng Special Steel Co.,Ltd.,Jiangyou 621701,Sichuan,China;Chengdu Advanced Metal Material Industry Technology Research Institute Co.Ltd.,Chengdu 610000,Sichuan,China)

机构地区：[1]攀钢集团江油长城特殊钢有限公司,四川江油621701 [2]成都先进金属材料产业技术研究院股份有限公司,四川成都610000

出　　处：《特钢技术》2024年第4期30-35,共6页Special Steel Technology

摘　　要：针对传统电渣炉是大气条件下进行重熔,生产出的产品存在活泼元素烧损且头尾差异大、电渣过程吸气(增[H]、增[O]、增[N]),重熔过程对人的经验依赖性强,不能实现恒熔速控制等,我厂引进大量保护性气氛电渣炉用于解决以上问题。可在实际生产运用过程中,出现了一些质量问题,特别是电渣重熔过程的增氮问题。虽然在使用保护性电渣炉的过程中通过炉内充Ar气营造并维持渣池上方的惰性性气氛达到隔绝空气的目的,但是在保护性气氛电渣炉生产热作模具钢控氮品种依然出现头尾增氮严重,甚至超标的现象。因此我厂成立专门攻关小组研究保护性气氛电渣炉增氮的机制,同时通过各项试验验证逐一排除各项影响因子,最终给出相关控制措施,解决电渣增氮难题。In response to the traditional electric slag furnace that performs remelting under atmospheric conditions,the products produced have a series of problems such as burning of active elements and large composition differences between the head and tail,gas absorption during the electric slag process,strong dependence on human experience in the remelting process,and inability to achieve constant melting rate control.For this reason,our factory has introduced a large number of protective atmosphere electric slag furnaces to solve the above problems,in order to achieve quality upgrades of various products.Although the inert atmosphere above the slag pool is created and maintained by filling the furnace with Ar gas to isolate air during the use of a protective electric slag furnace,there is still a serious increase in nitrogen at the beginning and end of the production of hot work die steel controlled nitrogen varieties in the protective atmosphere electric slag furnace,even exceeding the standard.Therefore,our factory has established a dedicated research team to study the mechanism of nitrogen increase in protective atmosphere electric slag furnaces.At the same time,various influencing factors have been eliminated through various experiments,and relevant control measures have been proposed to solve the problem of nitrogen increase in electric slag.

关 键 词：保护性气氛电渣炉 充Ar 增氮 

分 类 号：TG142.33[一般工业技术—材料科学与工程]