50t EAF-AOD-LF-10t铸锭流程AISI 321不锈钢含钛夹杂物演变行为  

Evolution and Formation of Ti-bearing Inclusions in AISI 321 Stainless Steel in 50 t EAF-AOD-LF-10 t Ingot Casting Flow Sheet

作　　者：陈瑞梅 白雪峰 孙彦辉[1] 张一民 卓超 金吉男 付少朋 朱雪珍 Chen Ruimei;Bai Xuefeng;Sun Yanhui;Zhang Yimin;Zhuo Chao;Jin Jinan;Fu Shaopeng;Zhu Xuezhen(Collaborative Innovation Center of Steel Technology,University of Science and Technology Beijing,Beijing 100083;Zhejiang Qingshan Iron & Steel Co Ltd,Lishui 323903)

机构地区：[1]钢铁共性技术协同创新中心,北京科技大学,北京100083 [2]浙江青山钢铁有限公司,丽水323903

出　　处：《特殊钢》2019年第4期7-11,共5页Special Steel

基　　金：国家自然科学基金资助项目(51574026);浙江青山钢铁有限公司资助

摘　　要：研究了模铸工艺生产的AISI 321不锈钢含钛夹杂物的演变。工业试验表明,LF喂钛线后,发生钛的氧化行为,随着冶炼过程的进行,Ti2O3在夹杂物平均成分中的比例逐渐升高,TiN主要以均质氮化钛和含芯氮化钛为主,含芯TiN核心成分为MgO及MgO·Al2O3,也有少量的TiOx-MgO-Al2O3核心。通过热力学软件Factsage计算了钢水中Ti-Al-O、Ti-N稳定相图以及凝固过程TiN的析出行为。Evolutionand formation of Ti-bearing inclusions in AISI 321 stainless steel in ignoring casting process was investigated.The industrial test results show that titanium oxidation occurs after Ti addition in LF process and the proportion of Ti2O3 in the average inclusions compositions increased along with the smelting process.The TiN inclusions observed were pure TiN and TiN with core MgO and MgO·Al2O3 or with minor core TiOx-MgO-Al2O3.Moreover,the stable diagram of Ti-Al-O and Ti-N in the liquid steel and precipitation of TiN during solidification were also calculated by thermodynamic software Factsage.

关 键 词：AISI 321不锈钢 含钛夹杂物 演变 热力学 

分 类 号：TG142.71[一般工业技术—材料科学与工程]