锻压技术

P91钢的热压缩动态组织演化数值模拟

英文标题：Simulation of P91 steel dynamic microstructure evolution during hot-upsetting

作者：金雪芹张建毕大森

单位：天津理工大学

分类号：TG376.2

出版年,卷(期):页码：2012,37(3):119-122

摘要：

针对电站大口径厚壁无缝管典型用钢T/P91（10Cr9Mo1VNb），利用Gleeble-3500热模拟试验机采集了T/P91耐热钢的高温流动应力应变曲线。以Avrami方程为基础，结合单项热压缩实验发生完全动态再结晶试样的金相分析，回归得到方程中的模型参数，从而确立P91合金钢在不同变形条件下的动态再结晶数学模型。采用Deform数值模拟软件对热模拟实验动态再结晶过程进行数值模拟，对比金相实验结果，验证P91合金钢动态再结晶数学模型的正确性。

Based on the T/P91 (10Cr9Mo1VNb) steel which is the typical material of the large-diameter seamless steel tube with thick wall, by using the Gleeble-3500 thermal simulation test enginery, the flow stress and strain curve of heat resistant T/P91 steel in the high temperature were collected. Taking Avrami equation as the foundation, combined with the metallographic analysis to the samples occurred fully dynamic recrystallization during the hot compression experiment, the parameters of Avrami equation was established by the linear regression method. The P91 mathematical model of dynamic recrystallization in the different deformation conditions was validated. In order to validate the correctness of P91 steel alloy dynamic recrystallization mathematical model, the results of the numerical simulation about hot compress experiences were adopted and Deform software was used through comparing with metallographic experiment.

基金项目：

工信部科技重大专项资助项目(2009ZX04014-063-03)

参考文献：

［1］金荣,刘正东,程世长,等. 应变速率和变形温度对T122耐热钢流变应力和临界动态再结晶行为的影响[J].金属学报，2007,43(1)35-40.
［2］Guntz G,Juhen M,Kottmann G,et al. The T91 Book: Ferritics Tubes and Pipe for High Temperature Use in Boliers[M]. Vallourec industries, France Revision，1994.
［3］朱丽慧,赵钦新,顾海澄,等. 新型耐热钢T91的蠕变断裂寿命估算[J].锅炉技术，2002,33(5):24-27.
［4］王雪凤,吴任东,邓晨曦,等.新型耐热高强钢P91的高温力学性能[J]. 机械工程学报,2008,(6):243-247.
［5］徐小华,陈俊德,姚靓,等.大口径P91无缝钢管低温形变退火[J].金属热处理，2010,35(4):972.
［6］束国刚，赵彦芬，薛飞，等. P91钢蠕变损伤试验研究与数值模拟[J].中国电机工程学报, 2010,30(23)：103-107.
［7］王雪凤，吴任东，邓晨曦.新型耐热高强钢P91的高温力学性能[J].机械工程学报，2008，44（6）：243-247.
［8］顾勇.热镦粗过程的微观组织模拟研究[J].锻压技术，2010,35(4):137-141.
［9］Yada H, Senuma T. Resistance to hot deformation of steel[J]. Adv. Tech. Plast,1988, 27(2): 33-44.
［10］Yaghi A H，Hyde T H，Becker A A.Residual stress simulation in welded sections of P9l pipes[J]. Journal of Materials Processing Technology,2005, 167(3):480-487.

服务与反馈：

【文章下载】【加入收藏】