一种新型镍基粉末高温合金WZ-A3的热压缩变形行为  

Hot Compression Deformation Behavior of Novel Ni-Based PM Superalloy WZ-A3

作　　者：肖磊 崔金艳 王冲 马向东 熊江英 龙安平 杨金龙[1,2] 郭建政 Xiao Lei;Cui Jinyan;Wang Chong;Ma Xiangdong;Xiong Jiangying;Long Anping;Yang Jinlong;Guo Jianzheng(Shenzhen Wedge Central South Research Institute Co.,Ltd,Shenzhen 518000,China;State Key Laboratory of Powder Metallurgy,Central South University,Changsha 410083,China)

机构地区：[1]深圳市万泽中南研究院有限公司,广东深圳518000 [2]中南大学粉末冶金国家重点实验室,湖南长沙410083

出　　处：《稀有金属材料与工程》2022年第4期1427-1435,共9页Rare Metal Materials and Engineering

基　　金：广东省重点领域研发计划项目(2019B010935001);国家科技重大专项(2017-Ⅵ-0009-0080);深圳市工业和信息化局项目(201806071114243770)。

摘　　要：基于Gleeble热压缩模拟试验,研究变形温度和应变速率对一种新型第3代镍基粉末高温合金WZ-A3挤压态试样在变形温度1040~1130℃,应变速率0.0025~0.01 s;条件下的热压缩变形行为,分析了合金在不同热压缩条件下的晶粒尺寸及显微组织的变化。结果表明:WZ-A3合金挤压棒在1070~1100℃温度范围,0.005~0.01 s;应变速率范围内热压缩变形后可以获得4μm左右细小均匀的γ+γ’显微双相晶组织,各部位均未出现异常晶粒长大的现象。根据以上实验条件成功制备了2件直径190 mm高115 mm的热模锻试验盘,为制定WZ-A3合金的等温锻造工艺提供了参考依据。A novel third generation Ni-based PM(powder metallurgy)superalloy WZ-A3 was evaluated for its hot compression behavior.Gleeble simulation tests on the extruded WZ-A3 samples over the temperature range of 1040~1130℃and strain rate range of 0.0025~0.01 s;were conducted.The samples compressed under different conditions were analyzed for grain size and microstructure evolution.The results indicate that under the compression conditions of temperatures from 1070℃to 1100℃,and strain rate from 0.005 s;to 0.01 s;,a uniform fine grain around 4μm withγ+γ’microduplex structure can be obtained,and no abnormal grain growth and necklace grains are observed throughout.To validate compression property of the extruded WZ-A3 alloy,hot die forging was conducted successfully to make two prototype forgings with the size of 190 mm in diameter and 115 mm in height.

关 键 词：镍基粉末高温合金 热压缩变形 晶粒度 γ+γ’显微双相晶组织 

分 类 号：TG146.15[一般工业技术—材料科学与工程]