GH4738合金涡轮盘锻造过程的集成式模拟及应用-金属学报.PDFVIP

第50 卷 第7 期 Vol.50 No.7 2014 年7 月 第821-831 页 ACTA METALLURGICA SINICA Jul. 2014 pp.821-831 GH4738 合金涡轮盘锻造过程的集成式模拟及应用* 李林翰 董建新 张麦仓 姚志浩 (北京科技大学材料科学与工程学院, 北京100083) 摘 要 基于GH4738 合金的热流变应力模型及晶粒组织演变模型, 提出并实现了利用Deform 3DTM 软件对该合金涡轮盘从自 由锻前预热直至模锻完成的整个锻造过程的集成式模拟. 借助集成式模拟实现了对锻件在整个锻造过程中温度、平均晶粒尺 寸等参数的定量控制. 同时采用直径300 mm 涡轮盘的实际锻造结果验证了所用模型和该模拟方法的可靠性. 最后, 把集成式 4 模拟运用于直径1450 mm 涡轮盘盘件的锻造过程模拟, 并根据模拟优化方案在8×10 t 锻压机下成功锻制直径1450 mm 涡轮 盘盘件. 为大型变形高温合金涡轮盘的锻造成型提供了工艺优化的理论依据和研究方法. 关键词 GH4738 合金, 涡轮盘, 集成式模拟 中图法分类号TG 132.32, TG312 文献标识码 A 文章编号 0412-1961(2014)07-0821-11 INTEGRATED SIMULATION OF THE FORGING PROCESS FOR GH4738 ALLOY TURBINE DISK AND ITS APPLICATION LI Linhan, DONG Jianxin, ZHANG Maicang, YAO Zhihao School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083 Correspondent: YAO Zhihao, lecturer, Tel: (010) E-mail: zhihaoyao@ustb.edu.cn Supported by High Technology Research and Development Program of China (No.2012AA 03A 513) Manuscript received 2013-10-25, in revised form 2014-04-03 ABSTRACT In order to control the grain size of forged turbine disk of wrought superalloy like GH4738 more effectively, constitutive equations and grain structure evolution models of GH4738 alloy are used in Deform 3DTM for achieving integrated simulation of whole forging process of GH4738 alloy turbine disk (from preheating billet for upsetting to die forging). By using of integrated simulation, the variation of temperature, average grain size, etc., during th