文档介绍：第35卷 第8期2014年 8月材 料 热 处 理 学 报TRANSACTIONSOFMATERIALSANDHEATTREATMENT 2014DOI:.1009-,2,王春旭2,厉 勇2,项金钟1,黄顺喆2,韩 顺2(,云南昆明 650091;,北京 100081)Sellars摘要:利用金相实验方法,基于实验数据,应用Beck、Hillert、Sellars数学模型研究了40CrNi2MoE钢在加热温度850~1200℃和保温时间30~480min下的奥氏体晶粒长大规律。结果表明,随加热温度升高和保温时间延长,40CrNi2MoE钢奥氏体晶粒逐渐长大,当加热温度超过1050℃或保温时间超过120min时,试验钢奥氏体晶粒开始粗化。通过对Beck、Hillert和Sellars3种晶粒长大数学模型对比分析,Sellars模型对40CrNi2MoE钢的奥氏体晶粒尺寸预测具有较高的精度,其奥氏体晶粒长大模型方程Sellars为:当温度为850℃≤T≤1050℃时,=×1021texp(-390081/(RT));当温度为1050℃≤T≤1200℃时,=×1041texp(-771322/(RT))。关键词:40CrNi2MoE钢;奥氏体;晶粒长大;Sellars模型中图分类号: 文献标志码:A 文章编号:1009-6264(2014)08-0232-07Mathematicalmodelsofaustenitegraingrowthin40CrNi2MoEsteelXUWen-shuai1,2,WANGChun-xu2,LIYong2,XIANGJin-zhong1,HUANGShun-zhe2,HANShun2(,YunnanUniversity,Kunming650091,China;,CentralIron&SteelResearchInstitute,Beijing100081,China)Abstract:Thegrowthlawofaustenitegrainin40CrNi2MoEsteelatvariousheatingtemperatures(850-1200℃)andholdingtime(30-480min)wasinvestigatedonthebasisofexperimentaldataandBeck,-austenitegrainsizeof40CrNi2MoEsteelincreaseswithincreasingheatingtemperatureandholdingtime,andtheaustenitegrainofteststeelsbeginstoco