X120管线钢镁铝尖晶石对形变奥氏体及γ→α相变的影响  

Effect of MgAl_2O_4 Inclusions in X120 Pipeline Steel on Deformed Austenite and γ→α Transformation

作　　者：李太全[1] 包燕平[1] 刘建华[1] 武会宾[1] 任毅[2] 吴华杰[1] 

机构地区：[1]北京科技大学,北京100083 [2]鞍钢技术中心,辽宁鞍山114000

出　　处：《钢铁》2009年第7期62-65,共4页Iron and Steel

摘　　要：对微镁处理X120管线钢轧制工艺进行热模拟,发现镁铝尖晶石可以在形变奥氏体细化与再结晶时起到形核核心的作用,同时晶界夹杂物还有晶内铁素体诱导的双重作用。镁铝尖晶石还可以在晶粒粒径小于50μm甚至10μm的形变奥氏体内直接诱导晶内铁素体形核,部分夹杂物也有在形变奥氏体内感生形核的作用。The hot rolling simulation behavior of X120 pipeline steel with Mg treatment is carried on Gleeble-3500. There are found that the MgAl2O4 inclusions can fine deformed austenite during the austenite rolling fining and recrystallizing by stimulating austenite nucleation. Meantime, the inclusions at crystal boundary can stimulate intragranular ferrite nucleation. The inclusions can stimulate intragranular ferrite nucleation in deformed austenite whose size is within 20 μm and even 10 μm, part of which can stimulate sympathetic nucleation also.

关 键 词：热模拟 形变奥氏体 晶界夹杂物 诱导 晶内铁素体 

分 类 号：TG142.25[一般工业技术—材料科学与工程]