北京科技大学学报Issue(1)：42-49,8.DOI:10.13374/j.issn2095-9389.2015.01.007
CSP流程钛微合金化高强钢的第二相粒子析出行为
Precipitation behavior of Ti-microalloyed high-strength steel by CSP process
摘要
Abstract
Optical microscopy, electron microscopy and physic-chemical phase analysis, in combination with thermodynamic calculations, were used to study precipitates and their precipitation regularity in Ti-microalloyed high-strength steel produced by CSP process. It is found that lots of spherical TiC and Ti( C,N) nanoparticles with a few of irregular shaped Ti4 C2 S2 above 100 nm in size exist in the steel with a yield strength of 700 MPa. TiN is completely precipitated from the steel before tandem rolling, but TiC mainly precipitates during coiling and cooling. The mass fractions of MC phases in the steel without Mo and the steel containing Mo are 0. 049% and 0. 043%, respectively. Owing to the addition of molybdenum, the amount of Ti precipitates in the steel containing Mo decreases while the precipitate size becomes smaller. The precipitation strengthening effects of the steel without Mo and the steel containing Mo are 126 MPa and 128 MPa, respectively.关键词
高强钢/钛/微合金化/纳米粒子/析出强化Key words
high strength steel/titanium/microalloying/nanoparticles/precipitation strengthening分类
金属材料引用本文复制引用
田星,朱国明,康永林,张永锟,谭佳梅..CSP流程钛微合金化高强钢的第二相粒子析出行为[J].北京科技大学学报,2015,(1):42-49,8.基金项目
国家高技术研究发展计划资助项目(2013AA031601) （2013AA031601）
国家自然科学基金资助项目(U1460101) （U1460101）
