钢中铝对钛氧化物及针状铁素体形成的影响  

Effect of aluminum content on the formation of acicular ferrite and Ti composite oxide

作　　者：尚德礼[1] 吕春风[1] 于广文[1] 

机构地区：[1]鞍山钢铁股份有限公司技术中心,辽宁鞍山114009

出　　处：《炼钢》2009年第5期25-27,47,共4页Steelmaking

摘　　要：通过热力学计算及实验,研究了Al含量对含Ti钢中的夹杂物和凝固组织的影响。研究发现:w(Al)>0.003%时,钢中形成的夹杂物为Al的氧化物,该类夹杂物不能促进针状铁素体的形成,组织由平行排列的侧板条铁素体组成。w(Al)<0.003%时,钢中形成大量的Ti、Al、Ca、Si、Mn复合氧化物夹杂,其颗粒小于3μm。复合Ti的氧化物具有促进针状铁素体形核的能力,组织由大量的针状铁素体组成。The effect of aluminum content on inclusions and metal solidification was investigated by experiment and thermodynamic calculation in Ti bearing steel. The results show that the inclusions in the steel are mainly aluminum oxides as the aluminum content is higher than 0. 003wt%. Aluminum oxides could not promote the formation of acicular ferrite. The microstructures consist of side lath ferrites arranged in parellel. The inclusions in the steel are composed of Ti, Al, Ca, Si, Mn composite oxides with size〈 3μm as the aluminum content is lower than 0. 003wt%. Ti composite oxide could promote the formation of acicular ferrite and the microstructures consist of large amount of acicular ferrites.

关 键 词：氧化物冶金 针状铁素体 Ti2O3夹杂物 铝含量 

分 类 号：TF031[冶金工程—冶金物理化学]