Thermodynamic analysis of BN, AlN AND TiN Precipitation in boron-bearing steel

Metalurgija

Lei, J. L.¹  Sun, J.²  Wang, W. S.³  Zhu, H. Y.⁴ 

[1] Steel Group Co., Ltd., Handan, China;Handan Iron &Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan, China;School of Materials Science and Engineering, Hubei Polytechnic University, Huangshi, China

关键词: B-bearing steel;    Thermodynamic;    BN;    AlN;    TiN precipitates;    SEM;    TEM;    SIMS;    cracks;   

DOI  :  

学科分类：金属与冶金

来源: Hrvatsko Metalursko Drustvo

【 摘 要 】

In this paper, the precipitation behavior of BN, AlN and TiN particles in boron-bearing steel was studied based on thermodynamic calculation. During solidification process, precipitation amount of BN has a positive relationship with boron content, while has negative relationship with temperature. The binding capacity of boron and nitrogen is greater than that of aluminum and nitrogen, BN is preferentially precipitated as boron added to steel. BN particle reduces the free nitrogen content in steel and then prevents the formation of AlN particle. Combination of titanium and nitrogen element is more precedence than of boron and nitrogen element. Formation of TiN particle precedes BN particle, and the precipitation amount of BN is significantly reduced by adding titanium element to boronbearing.

【 授权许可】

CC BY