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

特殊钢 ›› 2019, Vol. 40 ›› Issue (4): 7-11.

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

陈瑞梅¹, 白雪峰¹, 孙彦辉¹, 张一民¹, 卓超¹, 金吉男², 付少朋², 朱雪珍²,

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

收稿日期:2019-02-28 出版日期:2019-08-01 发布日期:2022-05-14
作者简介:陈瑞梅(1994-)女,硕士生,(北京科技大学),2017年太原理工大学(本科)毕业，钢水洁净度研究。孙彦＜(1971-)男，教授，钢水洁净度控制研究。
基金资助:
国家自然科学基金资助项目(51574026)和浙江青山钢铁有限公司资助。

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

Chen Ruimei¹ ,Bai Xuefeng¹ ,Sun Yanhui¹, Zhang Yimin¹ ,Zhuo Chao¹, Jin Jinan² ,Fu Shaopeng² ,Zhu Xuezhen²

1 Collaborative Innovation Center of Steel Technology, University of Science and Technology Beijing, Beijing 100083 ；
2 Zhejiang Qingshan Iron & Steel Co Ltd, Lishui 323903

Received:2019-02-28 Published:2019-08-01 Online:2022-05-14

摘要/Abstract

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TiO_x-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。

Abstract: 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·Al₂0₃ or with minor core TiOx-MgO-Al₂O₃. Moreover,the stable diagram of Ti- Al-0 and Ti-N in the liquid steel and precipitation of TiN during solidification were also calculated by thermodynamic software Factsage.

陈瑞梅, 白雪峰, 孙彦辉, 张一民, 卓超, 金吉男, 付少朋, 朱雪珍. 50 t EAF-AOD-LF-10 t铸锭流程AISI 321不锈钢含钛夹杂物演变行为[J]. 特殊钢, 2019, 40(4): 7-11.

Chen Ruimei , Bai Xuefeng , Sun Yanhui, Zhang Yimin , Zhuo Chao, Jin Jinan , Fu Shaopeng , Zhu Xuezhen. Evolution and Formation of Ti-bearing Inclusions in AISI 321 Stainless Steel in 50 t EAF-AOD-LF-10 t Ingot Casting Flow Sheet[J]. Special Steel, 2019, 40(4): 7-11.