锻压技术

叶片锻造有限元模拟及试验的微观组织研究

英文标题：Research on microstructure of finite element simulation and experiment for forging blade

单位：郑州轻工业学院贵州大学

分类号：TP391；TG806

出版年,卷(期):页码：2018,43(4):9-15

摘要：

对叶片的完整锻造流程进行试验及研究，进一步分析了叶片锻造的流程规律和热处理工艺。在锻造后的叶片上选取5个关键点制作金相试样，建立了叶片锻造过程的有限元模型，并得到了关键点的金相组织，测量了晶粒截距和马氏体束宽度。运用建立的晶粒截距模型，对叶片成形过程中不同工艺参数对晶粒演化过程的影响规律进行分析。结果表明：各关键点处的晶粒度均不大于ASTM A369标准的4级；马氏体束对始锻温度不敏感；上模速度对马氏体束宽度影响不明显，对晶粒大小影响显著；马氏体束宽度对应变最为敏感；晶粒截距模型对晶粒截距预测的最大相对误差为19.33%，满足企业要求。

The complete forging process of blade was tested and studied, and the process rules and heat treatment process of forging blade were further analyzed. The metallographic specimens were made from five key points selected on the blade after forging, and the finite element model of forging process for blade was established. Then, the microstructures of key points were obtained, and the grain intercept and width of martensite bundle were measured. Furthermore, the influences of different process parameters on the evolution process of grain in the forming process of blade were analyzed by establishing the model of grain intercept. The results show that the grain size of each key point is not greater than that of the No.4 grade in the ASTM A369 standard. The martensite bundle is not sensitive to the initial forging temperature. The velocity of upper mold has not obvious effect on the width of martensite bundle, but it has significant effect on the grain size. And the width of martensite bundle is much more sensitive to the strain. Thus, the maximum relative error of grain intercept predicted by the grain intercept model is 19.33% which can meet the requirement of enterprise.

基金项目：

国家自然科学基金资助项目（11602229）；现代制造技术教育部重点实验室（贵州大学）开放课题（XDKFJJ［2016］07）；河南省基础与前沿技术研究计划项目（142300410399）；河南省产学研合作项目(162107000045)；郑州轻工业学院博士科研基金资助项目

李艳芹（1974-），女，学士，高级工程师；E-mail：yqli@zzuli.edu.cn

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