锻压技术

GH4169合金涡轮盘热模锻中晶粒尺寸演变的数值模拟与分析

英文标题：Numerical simulation and analysis on grain size evolution during the hot die forging for alloy GH4169 turbine disk

作者：张海燕程明赵忠张士宏

单位：宁波工程学院中国科学院

分类号：TG316.3

出版年,卷(期):页码：2017,42(11):1-5

摘要：

针对GH4169合金涡轮盘热模锻中易出现粗晶、混晶等显微组织缺陷，通过热模拟压缩实验和热变形后热处理实验，研究分析了GH4169合金在热变形和后续热处理中的显微组织演变规律，并建立了晶粒尺寸演变模型。实验结果表明：GH4169合金在热变形中的主要显微组织演变机制为动态再结晶，热变形后热处理中的主要显微组织演变机制为晶粒长大和孪晶生成。将晶粒尺寸演变模型与有限元结合，对某GH4169合金涡轮盘热模锻中的晶粒尺寸演变进行了预测分析，预测结果与实际结果一致。

For the microstructure defects of coarse grain and duplex grain always appearing during the hot die forging for alloy GH4169 turbine disk, its microstructure evolution during hot deformation and subsequent heat treatment were studied by the hot compression tests and heat treatment tests after hot deformation, and the grain size evolution models of alloy were established. The results indicate that the main evolution mechanism of alloy GH4169 during hot deformation is dynamic recrystallization, and the main evolution mechanism during heat treatment after hot deformation is grain growth and twins formation. At last, the grain size evolution of alloy GH4169 turbine disk during the hot die forging is predicted by combining grain size evolution model with finite element method, and the predicted results are in good agreement with the observation results.

基金项目：

国家自然科学基金资助项目（51505240）；浙江省自然科学基金资助项目（LY15E050008）；宁波市自然科学基金资助项目（2015A610068）

作者简介：张海燕（1981-），女，博士，副教授 E-mail：zhang-hai-yan@hotmail.comGH4169

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