GH4169合金塑性变形行为及加工图  

Deformation Behavior and Processing Map of the Nickel-based Superalloy GH4169 in the Isothermal Compression

作　　者：李淼泉[1] 王小津[1] 苏少博[2] 王海荣[2] 

机构地区：[1]西北工业大学,西安710072 [2]西安航空发动机集团有限公司,西安710021

出　　处：《中国机械工程》2008年第15期1867-1870,共4页China Mechanical Engineering

基　　金：国家自然科学基金资助项目(50475144);高等学校优秀青年教师教学科研奖励计划项目(CJ0402)

摘　　要：通过GH4169合金的热模拟压缩实验，研究了变形工艺参数对GH4169合金高温变形时流动应力的影响规律，建立了GH4169合金高温变形时的加工图，结果表明：变形温度升高和应变速率减小使GH4169合金高温变形时峰值流动应力和稳态流动应力显著降低；GH4169合金高温变形时存在三个非稳定区域，第一个区域的变形温度在970～1030℃之间，应变速率在10．0～50．0s^-1之间；第二个区域的变形温度在930～940℃之间，应变速率在0．15～7．Os^-1之间；第三个区域的变形温度在930～960℃之间，应变速率在7．0～50．0s^-1之间的区域。Isothermal compression for the nickel--based superalloy GH4169 was carried out at a Thermecmaster-Z simulator, effect of the process parameters on the flow stress was investigated and the processing map was obtained in isothermal compression of the nickel--based superalloy GH4169 according to the analyses of experimental results. The research results show that the peak and steady stress significantly decreases with an increasing of the deformation temperature and a decreasing of the strain rate in the high temperature deformation of the nickel-based superalloy GH4169. The processing map was drawn from the experimental data. From the processing map of nickel--based superalloy GH4169, three unstable regions are in the following： the first is as 970-1030℃ of deformation temperature and 10. 0-50.0s^-1 of strain rate, the second is as 930-940℃ of deformation temperature and 0. 15-7.0s 1 of strain rate, and the third is as 930-960℃ of deformation temperature and 7.0-50.0s^-1 of strain rate.

关 键 词：高温合金 热模拟压缩 加工图 变形行为 

分 类 号：TG311[金属学及工艺—金属压力加工] TB125[理学—工程力学]