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本文主要利用非水电解恒电流浸蚀萃取法,研究了微钛处理16Mn钢中Ti(CN)的析出行为。试样经两个阶段控轧后,分别以0.5℃/s,1℃/s和10℃/s等不同冷却速率进行控制冷却,实验结果表明:在该钢中存在奥氏体变形过程析出的Ti(CN)和应变诱导γ→α相变时析出的Ti(CN),析出相的平均颗粒尺寸随冷却速率的增加而减小。并估算了Ti(CN)的沉淀强化效应,它也随冷却速率的大小而变化。所得结论在实际大生产成品上也得到了证实。
In this paper, the non-aqueous electrolytic constant current etching extraction method was used to study the precipitation behavior of Ti (CN) in 16Mn steel treated with micro-titanium. After controlled rolling in two stages, the specimens were controlled and cooled at different cooling rates of 0.5 ℃ / s, 1 ℃ / s and 10 ℃ / s, respectively. The experimental results show that there is precipitation of austenite in the steel Ti (CN) and Ti (CN) precipitated during strain induced γ → α transformation, the average particle size of precipitation phase decreases with the increase of cooling rate. The precipitation strengthening effect of Ti (CN) was estimated, which also changed with the cooling rate. The conclusions reached in the actual production of finished products have also been confirmed.