基于Matlab的300M钢奥氏体晶粒的长大规律  

Austenite grain growth behavior of 300 M alloy steel based on Matlab

作　　者：温余远[1] 鲁世强[1] 刘俊伟[1] 刘大博[2] 刘天琦[2] 

机构地区：[1]南昌航空大学材料科学与工程学院,江西南昌330063 [2]北京航空材料研究院,北京100095

出　　处：《材料热处理学报》2012年第9期75-79,共5页Transactions of Materials and Heat Treatment

基　　金：江西省自然科学基金(2008GZC0041)

摘　　要：研究了300 M钢在不同加热温度(850～1180℃)和保温时间(5～120 min)下的奥氏体晶粒长大规律。绘制了300 M钢奥氏体晶粒尺寸在不同加热温度和保温时间下的等值线图;利用Sellars晶粒长大模型,构建了300 M钢的奥氏体晶粒长大数学模型。结果表明,300 M钢在高温加热时具有较好的抗晶粒粗化能力,在1050℃左右开始粗化。奥氏体晶粒尺寸等值线图可定性和定量预测奥氏体晶粒长大规律;奥氏体晶粒长大数学模型可用两个数学公式来描述,即当加热温度为850℃≤T≤1050℃时,d6.14=texp(68.97-64945.88/T);当加热温度为1050℃≤T≤1180℃时,d7.39=texp(134.56-144504.52/T)。Austenite grain growth behavior of 300 M alloy steel at various heating temperatures(850-1180 ℃) and holding time(5-120 min) was investigated,and the contour map of the austenite grain size was drawn.By using the Sellars model of grain growth,a mathematical model of austenite grain growth was constructed.The results show that 300 M alloy steel has good anticoarsening ability at elevated temperatures,and the austenite grain coarsening temperature is about 1050 ℃.The contour map of austenite grain size can be used to predict the austenite grain growth behavior quantitatively and qualitatively.The mathematical model of austenite grain growth can be described by two equations:(1) d6.14=texp(68.97-64945.88/T)(850 ℃≤T≤1050 ℃),(2) d7.39=texp(134.56-144504.52/T)(1050 ℃≤T≤1180 ℃).

关 键 词：300M钢 奥氏体晶粒 晶粒长大 模型 

分 类 号：TG142.25[一般工业技术—材料科学与工程]