EAF-CSP流程钛微合金化高强钢板的组织和性能研究  

Microstructure and Properties of Titanium Microalloyed High Strength Strip Produced by EAF-CSP

作　　者：毛新平[1] 孙新军 康永林[3] 林振源 周健[3] 

机构地区：[1]北京科技大学冶金生态与工程学院,北京100083 [2]广钢集团技术中心,广东广州510730 [3]北京科技大学材料科学与工程学院,北京100083

出　　处：《钢铁》2005年第9期65-68,76,共5页Iron and Steel

摘　　要：珠钢采用Ti微合金化技术在EAF CSP流程上成功地开发出屈服强度为450～700 MPa的高强度热轧钢板.系统地研究了试验钢的组织和性能,并分析了组织与性能的关系.结果表明,随钛含量增加或成品厚度减薄钢板的屈服强度显著提高,最高达到695 MPa;钛的质量分数低于0.024%时对屈服强度影响不大;当钛的质量分数低于0.045%时,钢板屈服强度的提高主要来自于晶粒细化,而当钛的质量分数大于0.045%后,钢板强度的进一步提高来自于沉淀强化.Titanium microalloyed high strength hot rolled strip with yield strength ranging from 450 MPa to 700 MPa was developed by EAF CSP at Zhujiang steel plant, Both the microstructure and properties of the Ti microalloyed steels were investigated, and the microstructure-property relationship was revealed. It has been shown that the yield strength of tested steels is increased with increasing Ti content or decreasing strip thickness. Titanium has little influence on the yield strength as its content is less than 0. 024%. Because the yield strength is mainly increased by grain refinement, in the case that titanium content is higher than 0,045%, however, the increase in yield strength is due to precipitation strengthening,

关 键 词：EAF—CSP流程 TI微合金化 高强钢 组织和性能 

分 类 号：TG113[金属学及工艺—物理冶金]