一种新型第三代单晶高温合金WZ30组织与性能的研究  

Microstructure and Properties of Third Generation Single Crystal Superalloy WZ30

作　　者：熊江英 龙安平[1,2] 张建庭 王冲 张海 张高翔 Xiong Jiangying;Long Anping;Zhang Jianting;Wang Chong;Zhang Hai;Zhang Gaoxiang(State Key Laboratory of Powder Metallurgy,Central South University,Changsha 410083,China;Shenzhen Wedge Central South Research Institute Co.,Ltd,Shenzhen 518000,China)

机构地区：[1]中南大学粉末冶金国家重点实验室,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

出　　处：《稀有金属材料与工程》2021年第11期3995-4002,共8页Rare Metal Materials and Engineering

基　　金：深圳市发展和改革委员会项目(SZDRC 20181000);广东省引进创新创业团队项目(607264877417);深圳市科技创新委员会项目(KQTD2015032716463668)。

摘　　要：通过热力学计算和实验验证优化了W、Mo、Co、Cr、Al、Ta等元素在单晶高温合金中的含量,设计了Re含量为5wt%的新型单晶高温合金WZ30,并与典型二代、三代单晶高温合金进行了比较。结果表明,WZ30经热处理后获得均匀的γ′相显微组织,在760、980和1100℃下WZ30的屈服强度分别为938、639和436 MPa,温度高于1000℃时拉伸性能优于二代单晶高温合金。在980℃,250 MPa和1100℃,137 MPa实验条件下,WZ30的持久寿命分别为642和254 h,持久寿命明显优于二代单晶高温合金。WZ30的低周疲劳寿命在980℃下明显优于二代单晶高温合金DD6。在高温长时间循环氧化实验中,WZ30显示出较好的抗氧化性和组织稳定性。The content of W,Mo,Co,Cr,Al,Ta and other elements in the single crystal superalloy was optimized through experimental data and thermodynamic calculations.A new third-generation single crystal superalloy WZ30 with Re content of 5 wt%was designed.The metallographic and mechanical properties of WZ30 were studied and analyzed,and the WZ30 alloy was compared with existing second-generation and third-generation single crystal superalloys.The results show that WZ30 has uniform microstructure after heat treatment.The yield strengths of WZ30 are 938,639 and 436 MPa at 760,980 and 1100℃,respectively.When the temperature is higher than 1000℃,the tensile performance of WZ30 is better than that of the second-generation single crystal superalloy.The creep rupture life of WZ30 is 642 h at 980℃,250 MPa and 254 h at 1100℃,137 MPa,which is significantly better than that of the second-generation single crystal superalloys.The low cycle fatigue life of WZ30 is better than that of the second-generation single crystal superalloy DD6 at 980℃.WZ30 alloy has better oxidation resistance and structural stability in high temperature cyclic oxidation experiments.

关 键 词：第三代单晶 WZ30 组织 性能 

分 类 号：TG146.15[一般工业技术—材料科学与工程]