冷却速度对Ti脱氧钢中针状铁素体形成的影响  

Effect of cooling rate on the formation of acicular ferrite in Ti deoxidized steel

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4期54-57,共4页Steelmaking

摘　　要：观察了不同冷速下获得的Ti脱氧钢的显微组织，并用能谱仪分析了夹杂物的化学成分。结果表明，在500-800℃，以8～15℃／s的速度冷却，钢中会有针状铁素体析出。氧化物冶金钢中的Ti—Al复合夹杂物诱导针状铁素体形核并促进感生形核，针状铁素体互相交织，从而产生细化组织的效果。The microstructures obtained at different cooling rates were studied in the Ti deoxidized steel and the chemical composition was also analyzed by energy dispersive Xray spectroscopy. The result shows that at the cooling rate of 8 ℃/s to 15 ℃/s, the acicular ferrites are formed within a temperature range of 500 ℃ to 800℃. The Ti-Al inclusions can induce nucleation of acicular ferrite and sympathetic nucleation as well, which make the acicular ferrite in steel interlocked and grains refined apparently.

关 键 词：氧化物冶金 针状铁素体 冷却速度 

分 类 号：TG142.13[一般工业技术—材料科学与工程]