热模拟工艺参数对热轧双相钢中第二相粒子析出行为的影响（新）
The effect of thermal simulation processing parameter on the second-phase particle precipitation for hot rolled dual-phase steel
孙成钱，孟凡磊，张红梅，乔立峰
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作者单位：辽宁科技大学，
鞍山钢铁公司
中文关键字：热模拟；热轧双相钢；第二相粒子；萃取复型
英文关键字：
中文摘要：以含铌和钛热轧双相钢为研究对象，在热模拟机MMS-200上研究了变形量对热轧双相钢中第二相粒子析出行为的影响。通过显微组织观察可以发现，热轧含铌和钛的双相钢呈现明显的双相特征，组织为铁素体和少量马氏体。随着变形量的增加，晶粒尺寸减小，第二相粒子尺寸明显减小且析出增多，分布比较弥散。尺寸大的粒子呈方形，含铌量多，含钛量少。
英文摘要：The effect of reduction on the second-phase particle precipitation of the hot rolled dual-phase Nb and Ti-bearing steel were studied on MMS-200. It is found that the dual-phase steel displays clearly classic dual phase morphology which is ferrite and martensite by the observation of microstructure.The grain sizes are smaller, the size of the second-phase particles are clear smaller and the quantity of the precipitated second-phase particles are increased and dispersed with the increasing of reduction.the size of larger particles are square and contain higher Nb and lower Ti.