GH4169合金压缩热变形行为及临界损伤值  

Compression hot deformation behavior and critical damage value for alloy GH4169

作　　者：刘光辉 孙红星 郑晓磊[3] 王龙飞 蔡宗超 康根发 秦单单 刘华 Liu Guanghui;Sun Hongxing;Zheng Xiaolei;Wang Longfei;Cai Zongchao;Kang Genfa;Qin Dandan;Liu Hua(China Academy of Machinery Zhengzhou Research Institute of Mechanical Engineering Co.,Ltd.,Zhengzhou 450001,China;School of Mechanical Engineering,Xi'an Jiaotong University,Xi'an 710049,China;Henan Pinggao Electric Co.,Ltd.,Pingdingshan 467000,China;Henan Aerospace Precision Manufacturing Co.,Ltd.,Xinyang 464000,China)

机构地区：[1]中国机械总院集团郑州机械研究所有限公司,河南郑州450001 [2]西安交通大学机械工程学院,陕西西安710049 [3]河南平高电气股份有限公司,河南平顶山467000 [4]河南航天精工制造有限公司,河南信阳464000

出　　处：《锻压技术》2025年第2期227-234,共8页Forging & Stamping Technology

基　　金：科研院所双创基金项目(203SC2023001-07);河南省重点研发专项基金项目(231111221800)。

摘　　要：针对GH4169合金在锻造过程中存在的变形抗力大、锻造温度区间窄、易出现锻造裂纹等问题,对其热变形行为和临界损伤值进行研究。通过单道次热压缩实验得到GH4169合金在不同变形条件下的真应力-真应变曲线,经线性拟合后得到Arrhenius本构方程。基于实验数据进行了GH4169合金压缩热变形模拟,根据模拟结果分析了热变形过程中的最大损伤值,进而求得临界损伤值。研究结果表明:当变形温度一定时,GH4169合金的真应力与应变速率呈正相关;当应变速率一定时,GH4169合金的真应力与变形温度呈负相关。GH4169合金压缩热变形过程中的临界损伤值在不同变形条件下在一定范围内波动,且其对应变速率较敏感,当变形温度不变时,随着应变速率的增大,临界损伤值逐渐增大。研究结果对于GH4169合金的锻造工艺制定及其裂纹预测具有一定的指导意义。For the problems of high deformation resistance,narrow forging temperature range and easy occurrence of forging cracks during the forging process of alloy GH4169,the hot deformation behavior and critical damage value were studied.Through a single pass hot compression experiment,the true stress-true strain curves of alloy GH4169 under different deformation conditions were obtained,and the Arrhenius constitutive equation was obtained by linear fitting.Based on the experimental data,the compression hot deformation of alloy GH4169 was simulated,and according to the simulation results,the maximum damage value during the hot deformation process of alloy GH4169 was analyzed to obtain the critical damage value.The research results indicate that when the deformation temperature is constant,the true stress of alloy GH4169 is positively correlated with the strain rate,and when the strain rate is constant,the true stress of alloy GH4169 is negatively correlated with the deformation temperature.The critical damage value of alloy GH4169 during the compression hot deformation process fluctuates within a certain range under different deformation conditions,and the critical damage value is sensitive to the strain rate.When the deformation temperature remains constant,the critical damage value gradually increases with the increasing of strain rate.The research results have certain guiding significance for the forging process formulation and crack prediction of alloy GH4169.

关 键 词：GH4169合金 热变形行为 热加工图 临界损伤值 Arrhenius本构方程 

分 类 号：TG316.3[金属学及工艺—金属压力加工]