氩气雾化制粉FGH4097合金高压涡轮盘的组织与性能  

Microstructure and Properties of Argon Atomization FGH4097 Alloy High-pressure Turbine Disc

作　　者：熊江英 龙安平 肖磊 杨金龙 XIONG Jiangying;LONG Anping;XIAO Lei;YANG Jinlong(Institute of Powder Metallurgy,Central South University,Changsha 410083,China;Shenzhen Wedge Central South Research Institute Co.,L td.,Shenzhen 518000,China;Shen Wedge Aviation Technology Co.,Ltd.,Shenzhen 518000,China)

机构地区：[1]中南大学粉末冶金研究院,湖南长沙410083 [2]深圳市万泽中南研究院有限公司,广东深圳518000 [3]深圳市万泽航空科技有限责任公司,广东深圳518000

出　　处：《热加工工艺》2022年第16期22-27,共6页Hot Working Technology

基　　金：深圳市发展和改革委员会项目(SZDRC 20181000)。

摘　　要：对采用氩气雾化制粉(AA)+热等静压(HIP)制备的FGH4097合金高压涡轮盘进行组织分析及力学性能测试。结果表明:经过AA+HIP+热处理工艺制备的FGH4097全尺寸盘件符合荧光、低倍与超声检验技术要求(φ0.2mm-15 db)。盘件显微组织中未见连续网状分布的原始颗粒边界(PPB),残余显微孔洞(TIP)低于0.01%,晶粒度为ASTM7-8级,强化相γ’尺寸约400 nm,无明显粗大γ’及碳化物。室温、650、750℃拉伸试样抗拉强度均值分别为1521、1343、1181 MPa,屈服强度均值分别为1093、1030、985 MPa。室温冲击性能均值为46 J,布氏硬度均值为394HBW。650℃/980 MPa持久性能寿命均值为714 h,高于技术要求的100 h。750℃/450 MPa蠕变量到0.2%均值为277 h,高于技术要求的50 h。650℃/980 MPa应力控制低周疲劳性能均值寿命为198371周次,高于FGH4097-PREP-HIP盘件试样低周疲劳寿命。所有力学性能测试结果均满足FGH4097高压涡轮盘技术要求。根据大量数据统计分析,FGH4097-AA-HIP制备的盘件,其蠕变及低周疲劳性能均有较高可靠性。AA+HIP工艺可生产出综合力学性能良好、符合技术要求的FGH4097高压涡轮盘。The microstructure and mechanical properties of P/M superalloy FGH4097 high-pressure turbine discs, which were made by argon atomization(AA)+hot isostatic pressing(HIP) process, were investigated. The results reveal that there are no obvious defects in the FGH4097 full-size disk prepared by AA+HIP+ heat treatment(φ0.2 mm-15 db). No continuous network prior particle boundary(PPB) appears. There is tiny amount of thermally induced porosity(TIP) which is less than0.01%. The grain size is between ASTM 7-8 with no abnormal grains. The mean gamma prime precipitate size is 400 nm. The average tensile strength of the disc at room temperature, 650 ℃ and 750 ℃ is 1521 MPa, 1343 MPa and 1181 MPa respectively and the average yield strength is 1093 MPa, 1030 MPa and 985 MPa, respectively. The average room temperature impact energy is 46 J and the Brinell hardness is 394 HBW. The average stress rupture time of 650 ℃/980MPa is 714 h. The time of 0.2% creep is 277 h under 750 ℃/450 MPa. The average low-cycle fatigue life by stress control is 198,371 cycles at 650 ℃, 980 MPa. All mechanical properties meet the requirements of the FGH4097 high-pressure turbine disc technical standard, among them, creep and low cycle fatigue has high reliability of FGH4097-AA-HIP turbine disc. AA+HIP process could be applied to manufacture qualified FGH4097 high-pressure turbine discs.

关 键 词：氩气雾化制粉 FGH4097 显微组织 力学性能 

分 类 号：TG113.1[金属学及工艺—物理冶金] TG113.2[金属学及工艺—金属学]