北京科技大学学报2011，Vol.33Issue(8)：941-946,6.
CSP生产Ti微合金化高强钢中纳米碳化物
Nanocarbides in Ti-microalloyed high strength steel produced by CSP process
霍向东 1毛新平 2吕盛夏 1林振源 3陈麒琳3
作者信息
- 1. 江苏大学材料科学与工程学院,镇江212013
- 2. 广州珠江钢铁有限责任公司,广州510730
- 3. 广钢集团CSP应用技术研究所,广州510730
- 折叠
摘要
Abstract
Optical microscopy,electron microscopy and electrolytically extracted phase analysis,in combination with thermodynamic calculations,were used to study precipitates and their precipitation behavior in Ti-microalloyed high strength steel produced by CSP process.It is found that many micron-sized cubic TiN particles and a large number of nanometer precipitates exist in the steel.The mass fraction of MX phases（M=Ti,Mo,Cr;X=C,N） in the steel is 0.0927%,in which particles smaller than 10nm account for 26.9%.Thermodynamic calculations show that titanium nitride has been almost completely precipitated from the steel during or before soaking,but titanium carbide hardly precipitates before tandem rolling.Decreasing the contents of nitrogen and sulfide and controlling the coiling temperature can increase the volume fraction of titanium carbide,and decreasing the γ→α transformation temperature can prevent fine carbides from growing.These results indicate that the precipitation hardening resulting from nanometer particles is about 156MPa and the effect can be raised through controlling the chemical composition and rolling parameters.关键词
高强钢/紧凑式带钢生产/微合金化/纳米碳化物/沉淀强化Key words
high strength steel/compact strip production（CSP）/microalloying/nanocarbides/precipitation hardening分类
金属材料引用本文复制引用
霍向东,毛新平,吕盛夏,林振源,陈麒琳..CSP生产Ti微合金化高强钢中纳米碳化物[J].北京科技大学学报,2011,33(8):941-946,6.
