10%Cr钢高温流动特性研究及数值模拟  

Study on flow properties of 10%Cr steel at high temperature and numerical simulation

作　　者：朱罗北[1] 何建丽[1] 杨嘉良 Zhu Luobei;He Jianli;Yang Jialiang(School of Materials Engineering, Shanghai University of Engineering Science, Shanghai 201620, China)

机构地区：[1]上海工程技术大学材料工程学院

出　　处：《锻压技术》2018年第4期141-145,共5页Forging & Stamping Technology

基　　金：上海高校青年教师培养资助计划(ZZGCD15034)

摘　　要：X12Cr Mo WVNb N10-1-1（X12）铁素体耐热钢是核电转子常用材料,为研究其在高温条件下的变形行为,利用Gleeble-3800热力模拟实验机进行了应变速率为0.01~1 s-1、温度在1050~1250℃条件下的热压缩实验。实验表明,在压下量为25%时,材料仅在应变速率为1 s-1并且流动应力达到最大值后会发生明显的软化现象。同时,利用实验获取的材料数据,输入Deform-3D软件,进行了压下量为20%、应变速率为0.1 s-1时不同温度条件下的数值模拟,并对此种条件下的等效应力、等效应变和最大主应力的分布进行了分析讨论。结果表明：随着温度的升高,等效应变分布均匀,等效应力和最大主应力逐渐下降,并且最大主应力的减小幅度变大。The ferrite heat-resistant steel X12 Cr Mo WVNb N10-1-1（ X12） is often used in nuclear rotor. In order to study its deformation behavior at high temperature,the hot compression experiments were conducted by the Gleeble-3800 thermal simulation machine at different temperatures of 1050-1250 ℃ as well as different strain rates of 0. 01-1 s-1. The experiments show that the material obviously softens at the reduction of 25% when the strain rate is 1 s-1 and the flow stress reaches the maximum. At the same time,the material data obtained by experiments were imported into Defrom-3 D software,and the numerical simulations at different temperatures were conducted under the reduction of 20% and the strain rate of 0. 1 s-1. Furthermore,the distributions of equivalent stress,equivalent strain and the maximum principal stress were analyzed and discussed. The results show that with the increasing of temperature,the distribution of equivariant strain is uniform,the equivalent stress and the maximum principal stress gradually decrease,and the decreasing degree of the maximum principal stress becomes larger.

关 键 词：铁素体耐热钢 X12钢 变形行为 热压缩实验 DEFORM-3D 流动特性 

分 类 号：TG376.3[金属学及工艺—金属压力加工]