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采用Gleeble热模拟试验机和透射电镜、扫描电镜及定量金相等分析技术,就钛对低碳Mn-Ⅴ钢奥氏体晶粒长大行为、奥氏体动态再结晶行为等进行了研究。结果表明,含钛钢中形成稳定的碳氮化钛,对阻止再加热奥氏体晶粒长大有利。含钛钢变形抗力比不含钛钢要高,其动态再结晶开始的临界变形量比不加钛钢的小,易于发生再结晶,且含钛钢的再结晶晶粒尺寸相对较细,再结晶晶粒长大速度也更慢。
The austenite grain growth behavior, austenite dynamic recrystallization behavior of titanium in low carbon Mn-Ⅴ steel were studied by using Gleeble thermal simulator, transmission electron microscopy, scanning electron microscopy and quantitative gold analysis. The results show that the stable formation of titanium carbonitride in titanium-containing steel is good for preventing the re-heated austenite grain growth. The deformation resistance of titanium-containing steel is higher than that of titanium-free steel. The critical deformation at the beginning of dynamic recrystallization is smaller than that without titanium steel and recrystallization occurs easily. The recrystallized grain size of titanium-containing steel is relatively small. The grain growth rate is also slower.