基于二步形核理论的氧化物形核发展研究现状  

Development and research status of oxide nucleation based on two-step nucleation theory

作　　者：孟天宇 朱立光 王雁 朴占龙 霍金霞 MENG Tianyu;ZHU Liguang;WANG Yan;PIAO Zhanlong;HUO Jinxia(College of Metallurgy and Energy,North China University of Science and Technology,Tangshan 063210,Hebei,China;Hebei High Quality Steel Continuous Casting Engineering Technology Research Center,Tangshan 063000,Hebei,China;College of Materials Science and Engineering,Hebei University of Science and Technology,Shijiazhuang 050018,Hebei,China;Tangshan Iron and Steel Group Co.,Ltd.,Tangshan 063000,Hebei,China)

机构地区：[1]华北理工大学冶金与能源学院,河北唐山063210 [2]河北省高品质钢连铸工程技术研究中心,河北唐山063000 [3]河北科技大学材料科学与工程学院,河北石家庄050018 [4]唐山钢铁集团有限责任公司,河北唐山063000

出　　处：《连铸》2024年第3期12-24,40,共14页Continuous Casting

基　　金：国家自然科学基金青年基金资助项目(52004094);河北省自然科学基金资助项目(E2021209037);中央引导地方科技发展资金项目(236Z1017G);国家自然科学基金-区域创新发展联合基金重点资助项目(U21A20114);唐山市资助项目(23130204E);河北省高校基本科研业务费资助项目(JST2022002)。

摘　　要：在国家大力发展海洋经济背景下,为了提高船板钢的性能和焊接效率,必须采用高热量输入的大线能量焊接方式,但是高热量的焊接会使钢材焊接热影响区组织急剧恶化,导致焊接热影响区的低温冲击韧性骤降,从而威胁船体钢的使用安全性。氧化物冶金技术为大线能量焊接用钢的发展开辟了新的途径。为了系统阐述氧化物夹杂形核研究,介绍了三代氧化物冶金技术的发展历程和公认的两种主要形核理论,并且基于二步形核理论,从形核路径、诱导晶内针状铁素体形核效果等方面综述氧化物冶金技术发展过程中的铝氧化物、钛系氧化物、镁系钙系氧化物和稀土氧化物等各脱氧产物的形核研究现状,认为各类氧化物夹杂遵循二步形核理论,复合夹杂物更加有利于诱导晶内针状铁素体形成。从理论上开展对钢中有益夹杂物的形核演变机理研究。钢中有益夹杂物多为复合夹杂物,建立复合夹杂物的形核机制才能有效控制夹杂物的尺寸、分布等,从而更有效地诱发晶内针状铁素体的形成,促进氧化物冶金技术的基础理论研究的进一步发展,对氧化物冶金型钢开发及广泛应用具有重要意义。With the nation's marine industry growing at a rapid pace,high-heat input welding is required to improve the performance and welding efficiency of shipbuilding steel.The structural integrity of the steel welding heat affected zone would,however,severely deteriorate due to excessive high-heat input welding.This will result in a low temperature impact toughness of the welding heat affected zone,jeopardizing the safety of the hull steel.Improvements in oxide metallurgical technology have made it possible to create high-heat input welding steel.In order to systematically elaborate the study of oxide inclusion nucleation,the development of three generations of oxide metallurgy technology and two recognized main nucleation theories are introduced.Based on the two-step nucleation theory,the nucleation of aluminum oxide,titanium oxide,magnesium calcium oxide,rare earth oxide and other deoxidized products in the development of oxide metallurgy technology was reviewed from the aspects of nucleation path and inducing effect of intracrystalline acicular ferrite.The nucleation evolution mechanism of beneficial inclusions in steel is studied theoretically.The majority of steel's advantageous inclusions are complicated inclusions.Effective control over the size and distribution of inclusions can only be achieved by determining the nucleation mechanism of complicated inclusions.As a result,it can more successfully stimulate the production of intracrystalline acicular ferrite,advance the advancement of oxide metallurgy technology's fundamental theory,and have a significant impact on the advancement and widespread use of oxide metallurgical steel.

关 键 词：氧化物冶金 形核 机理 二步形核 夹杂物 

分 类 号：TF703[冶金工程—钢铁冶金]