摘要
采用焊接热模拟的方法，研究了Ti－N和Ti－Nb－N两种成份系列的微钛处理钢奥氏体晶粒长大的特点．试验结果表明，N含量为10×10－5时，加入适量的钛可以使微钛处理钢奥氏体晶粒粗化温度提高到1360℃以上．若钛含量相同或氮含量相同时，可用Ti／N比来比较细化奥氏体晶粒能力的大小，但Ti－Nb－N钢的理想化学配比值为2．74．
By means of thermal simulated weld, the growth behavior of austenite grain in steel additivated with Ti- N and Ti-Nb-N is studied. The experimental results show that the coarsing temperature of austenite grain in steel with optimum Ti increases to above 1360 ℃ when the N content is 10 ×10-5. When Ti or N content is constant, the fine capacity of austenite grain can be compared in a way of ratio of Ti/N and the optimum chemical retio in Ti - Nb - N steel is 2.74.
关键词
微钛处理
化学配比
奥氏体晶粒
钛氮比
Steel with trace Titanium, Optimum chemical ratio, Austenite grain
