摘要
研究了热处理制度对一种不含Re新型镍基单晶高温合金组织和性能的影响。通过差热分析法(DTA)确定了合金的固相线和液相线温度分别为1 351和1 383℃,金相法测出初熔温度介于1 290~1 295℃范围内。结果表明,合金经1 290℃/4 h+1 300℃/4 h+1 315℃/4 h A.C+1 100℃/6 h A.C+870℃/20 h A.C(空冷)热处理后,在980℃/276 MPa条件下持久寿命达到64.2 h。
Effects of heat treatments on microstructure and properties of a low cost Re-free Nickel-based single crystal superalloy were investigated. The solidus and liquidus temperature of the alloy was measured by differential thermal analysis （DTA） to be 1 351℃ and 1 383℃, respectively. The incipient melting temperature of the alloy determined by metallographic testing method was in the range of 1 290℃ to 1 295℃. The result showed that after heat treatment of 1 290℃/4h＋1300℃/4h＋1315℃/4 h A.C ＋1 100℃/6 h A.C ＋870℃/20 h A.C, the stress rupture life of the alloy turned out to be 64.2 h under the condition of 980 ℃ and 276 MPa.
出处
《上海金属》
CAS
北大核心
2017年第2期26-30,共5页
Shanghai Metals
基金
国家自然科学基金(No.51404148)
上海市科委项目(No.14521102900)
上海市商用航空发动机领域联合创新计划
关键词
镍基单晶高温合金
热处理
组织
持久性能
Ni- based single crystal superalloy, heat treatment, microstructure, rupture property
