GH4099合金粉末的热等静压成形和薄壁筒体的制造  

Hot Isostatic Pressing of GH4099 Alloy Powders and Preparation of Thin-walled Cylinders

作　　者：尹一峰 卢正冠 徐磊[1] 吴杰[1] YIN Yifeng;LU Zhengguan;XU Lei;WU Jie(Shi-changxu Innovation Center for Advanced Materials,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China;School of Materials Science and Engineering,University of Science and Technology of China,Shenyang 110116,China)

机构地区：[1]中国科学院金属研究所师昌绪先进材料创新中心,沈阳110016 [2]中国科学技术大学材料科学与工程学院,沈阳110016

出　　处：《材料研究学报》2024年第9期669-679,共11页Chinese Journal of Materials Research

基　　金：中国科学院基础研究领域青年团队计划(YSBR-025);国家科技重大专项(J2019-VⅡ-0005-0145)。

摘　　要：分别采用等离子旋转电极雾化法(PREP)和无坩埚感应熔炼超声气体雾化法(EIGA)制备出GH4099洁净预合金粉末,再将其热等静压(HIP)制备GH4099合金,研究了热等静压温度对其显微组织和拉伸性能的影响。采用优选的热等静压制度1230℃/150 MPa/4 h进行有限元模拟辅助包套设计,用PREP粉末制造出GH4099薄壁筒体。结果表明,与EIGA法相比,用PREP法制备的GH4099粉末球形度更好、表面氧化层更薄,更适合进行热等静压成形。在1165℃~1230℃随着热等静压温度的提高GH4099合金的孔隙和原始颗粒边界数量显著减少,使其在900℃的拉伸性能提高。用PREP粉末制造的GH4099薄壁筒体,其关键尺寸与实际薄壁筒体的相对偏差小于5%。Two pre-powders of GH4099 alloy were prepared via techniques of plasma rotating electrode process(PREP)and electrode induction melting gas atomization(EIGA)respectively.Then,the powders were subjected to hot isostatic pressing(HIP)to prepare bulk GH4099 alloy(PM GH4099 alloy),and the effect of HIP temperature on the microstructure and tensile properties of PM GH4099 alloy was investigated.The results show that in comparison with EIGA process,the GH4099 powder prepared by PREP process has better powder sphericity with thinner surface oxide scale,which is more suitable for hot isostatic pressing preparation of workpiece of PM GH4099 alloys.With the increasing HIP temperature within the range of 1165℃~1230℃,the porosity and prior particle boundaries(PPBs)of the acquired PM GH4099 alloy decreases significantly,therewith,the corresponding tensile properties at 900℃were improved.Finally,with the help of finite element modeling(FEM)to assist the envelope design and make,and finally thin-walled cylinders of PM GH4099 were successfully fabricated with the PREP powder via HIP at 1230℃/150 MPa/4 h.The FEM predicted dimensional shrinkages are consistent with that of the actual made thin-walled cylinders of PM GH4099,and the deviation between the corresponding key dimensions is less than 5%.

关 键 词：金属材料 GH4099合金 粉末冶金 热等静压 近净成形 

分 类 号：TG132.32[一般工业技术—材料科学与工程]