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GH4079 合金热等静压成形及其力学性能研究
Study on the HIP Formation and MechanicalProperties of GH4079 Superalloy
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- DOI:
- 作者:
- 肖 杨 1，王 琦 2，张志刚 2，孙 兵 2，刘 栋 3，宋嘉明 2
XIAO Yang1, WANG Qi2, ZHANG Zhigang2, SUN Bing2, LIU Dong3, SONG Jiaming2
- 作者单位:
- 1. 贵州航宇科技发展股份有限公司，贵州 贵阳 550081；2. 西安欧中材料科技股份有限公司 陕西省金属球形粉末新材料工程研究中心，陕西 西安 710018；3. 中国航发贵阳发动机设计研究所，贵州 贵阳 550081
1. Guizhou Aviation Technical Development Co., Ltd., Guiyang 550081, China; 2. New Materials Engineering ResearchCenter for Spherical Metal Powder of Shaanxi, Xi'an Sino-Euro Materials Technologies Co., Ltd., Xi'an 710018, China;3. AECC Guiyang Engine Design Research Institute, Guiyang 550081, China
- 关键词:
- GH4079 合金，热等静压，粉末冶金，拉伸性能
GH4079 superalloy; hot isostatic pressing; powder metallurgy; tensile properties
- 摘要:
- 基于超高转速等离子体旋转电极雾化和热等静压技术，开 发 了GH4079 合金的“超高转速等离子旋转电极雾化+热等静压(HIP)成形+热处理调控”的成形路线，并针对小型试坯开展了微观组织及力学性能相关试验。 实验结果 表 明，HIP 及标准热处理后的 GH4079 合金中晶粒尺寸细小且均匀，基本上没有原始颗粒边界(PPB)的 存 在；其高向和径向的平均抗拉强度分别(1 504±2.6) MPa 和(1 500±2.5) MPa，平均断后 伸 长 率 为(22.0±0.3)%和(22.2±0.4)%，其高向和径向的室温冲击韧性分别 为(52.2±2.3) J/cm2 和(52.5±1.2) J/cm2，GH4079 合金粉冶制件室温力学性能表现出高稳定性。A near-net-shaped processing route for a GH4079 superalloy was established through super-speed plasmarotating electrode processing (SS-PREP), hot isostatic pressing (HIP), and heat treatment. Comprehensive microstructuralcharacterization and mechanical property evaluation were performed on the samples. Experimental analysis reveal thatHIPed GH4079 subjected to standard heat treatment develops a refined, homogeneous grain structure with completeelimination of prior particle boundaries (PPB). The material exhibits average tensile strengths of (1 504±2.6) MPa (vertical)and (1 500±2.5) MPa (radial), accompanied by elongations of (22.0±0.3)% and (22.2±0.4)%, respectively. Testing revealsaverage impact toughness values of (52.2±2.3) J/cm2 (vertical) and (52.5±1.2) J/cm2 (radial). These results demonstrate theexceptional directional stability of the powder-metallurgy GH4079 superalloy, with the mechanical properties showingminimal orientation dependence.