GH4720Li高温合金热加工工艺研究  

Study on Hot Working Technology of GH4720Li Superalloy

作　　者：田喜明[1] 史蒲英[2] 李坤 孙小平[2,3] 王凯旋 景建发[2,4] TIAN Ximing;SHI Puying;LI Kun;SUN Xiaoping;WANG Kaixuan;JFNG Jianfa(Naval Equipment Department,Xi'an 710021,China;Shaanxi Aviation Materials Engineering Laboratory,Western Superconducting Materials Technologies Co.,Ltd.,Xi'an 710018,China;School of Materials Science and Engineering,Northwestern Polytechnical University,Xi'an 710072,China;School of Resource Processing and Bioengineering,Central South University,Changsha 410083,China)

机构地区：[1]海军装备部,陕西西安710021 [2]西部超导材料科技股份有限公司陕西省航空材料工程实验室,陕西西安710018 [3]西北工业大学材料学院,陕西西安710072 [4]中南大学资源加工与生物工程学院,湖南长沙410083

出　　处：《铸造技术》2021年第3期176-179,共4页Foundry Technology

摘　　要：从热力学角度,分析了GH4720Li合金中各个相的析出规律。依据热处理试验结果.确定了合适的加工温度范围;依据轧制过程数值模拟结果,获得了可行的轧制道次变形量匹配。结果表明,热加工温度不应超过1160℃;在114℃加热条件下,单次轧制加工变形量不超过30%;试验棒材的晶粒度为8〜9级,其力学性能满足标准要求。The precipitation law of each phase in GH4720Li alloy was analyzed from the thermodynamic point of view.According to the heat treatment test results,the appropriate processing temperature range was determined.According to the numerical simulation results of rolling process,the feasible deformation matching of rolling passes was obtained.The results show that the hot working temperature should not exceed 1160℃.Under the heating condition of 1140℃,the single rolling deformation is less than 30%.The grain size of the sample is 8~9 grade,and its mechanical properties meet the standard requirements.

关 键 词：GH4720Li合金 轧制 棒材 工艺 

分 类 号：TG335[金属学及工艺—金属压力加工] TG113