冷却速度对V-N微合金钢相变行为的影响

Iron Steel Vanadium Titanium(2013)

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Abstract
采用Gleeble-3500热/力模拟试验机、金相显微镜和显微硬度计研究了V-N微合金钢的连续冷却组织转变规律,分析了冷速对组织及性能的影响。试验结果表明:V-N微合金钢过冷奥氏体连续冷却过程中发生了铁素体析出、珠光体转变、贝氏体转变和马氏体转变;冷却速度影响铁素体分布和晶粒大小;珠光体相变结束临界冷速为7.0℃/s、贝氏体相变开始临界冷速为3.0℃/s、马氏体相变开始临界冷速为15℃/s。
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Key words
microstructure,CCT curve,cooling speed,V-N microalloyed steel
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