高Nb钢变形奥氏体再结晶规律研究  

Study on Austenite Recrystallization of High Nb

作　　者：王端军 张华伟 

机构地区：[1]南京钢铁联合有限公司技术质量部

出　　处：《南钢科技与管理》2008年第3期1-4,共4页NISCO Technology and Management

摘　　要：采用阶梯试样，研究0．09％NbHTP（High Temperalure Processing）钢形变奥氏体再结晶规律，分析变形温度、变形量等工艺参数对变形奥氏体再结晶百分数的影响，绘制实验铜变形奥氏体再结晶图。结果表明，变形量为60％时，实验铜的完全再结晶临界温度为1050℃，未再结晶临界温度为900℃，分别比含Nb0．03％的普通HSLA钢相应温度提高了100℃，热机械加工性能得到大幅度提高，证明高含量Nb对奥氏体再结晶的强烈阻滞作用。With step test specimens, the 0.09% Nb HTP steel deformed austenite were observed by optical microscope, the influence of the parameters including roiling temperature and reduction on recrystallization fraction of deformed austenite was studied, the deformed austenite recrystallization figure of the test steel was obtained. The result shows that static recrystallization temperature of HTP steel is above 100℃ higher than common HSLA steel, HTP steel has better heat process performance, high content Nb has great function of holding back for recrystallization.

关 键 词：HTP 再结晶 微合金元素 

分 类 号：TG142.45[一般工业技术—材料科学与工程] TG142.41[金属学及工艺—金属材料]