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研究了含钛钢热加工过程奥氏体再结晶动力学及其形核速率Nsv、长大速度G的关系;研究并探讨了形变诱发析出的第二相沉淀与再结晶的交互作用。结果表明,合钛钢的热加工奥氏体再结晶比碳钢迟缓,其推迟程度随含钛量增加越发显著;含钛钢的Nsv与G比碳钢小几个数量级。本实验条件下,再结晶动力学方程为V=1-exp(-at·N~(04.5)·G~K·t~K)。含钛钢在不同温度范围内以固溶Ti原子拖曳效应及Ti(CN)沉淀钉扎等机制阻止再结晶界面向未再结晶区推移。
The relationship between the recrystallization kinetics of austenite and the nucleation rate Nsv and the growth rate G of hot-working titanium-containing steels was studied. The interaction between precipitation-induced precipitation and recrystallization was investigated and discussed. The results show that austenite recrystallization of titanium alloy is slower than that of carbon steel, and the postponement degree becomes more significant with the increase of titanium content. The Nsv and G of titanium-containing steels are several orders of magnitude smaller than carbon steel. Under the experimental conditions, the recrystallization kinetics equation is V = 1-exp (-at · N ~ (04.5) · G ~ K · t ~ K). The titanium-containing steel prevents the recrystallization interface from transitioning to the non-recrystallization region in the temperature range with the mechanism of Ti (CN) precipitation and pinning of the solution Ti atoms.