利用Gleebe1500热模拟试验机,对氮钛微合金化高强钢在薄板坯连铸连轧工艺下进行了热模拟试验,对模拟各工序下的Ti(C,N)析出物形貌进行观察和分析,并通过热力学、动力学分析了其析出的原因和条件,研究了Ti(C,N)析出物在热轧工艺中变化的全过程.研究表明:连铸过程中主要有直径200 nm的液析TiN;铸坯均热后有直径为50 ～100 nm的固析TiN,在原始奥氏体晶界和枝晶偏析带析出直径为100 ～200 nm的TiC;连轧后主要有形变诱导析出分布均匀、直径为10 ～ 30 nm的TiC;卷取后在铁素体中析出直径为6～15 nm弥散分布的TiC.
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