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在一种35镍15铬型铁基高温合金中,随铝、钛和及钛铝比不同,合金中出现γ′-Ni_3(Al,Ti),M_3B_2,TiC,Y-Ti_2SC,β-NiAl,α-Ni_2AlTi,η-Ni_3Ti,σ和Layes相。铝、钛和对γ′相的数量、大小、错配度及化学成份有强烈影响。而钛铝比主要影响γ′相的错配度和成份,对数量和大小几乎没有影响。对于800℃(500小时)和700℃(5000小时)时效后的组织,铝、钛和也有显著影响,析出σ或Laves相的Al+Ti含量分别为5％和4％左右。铝、钛和及钛铝比并能明显影响室温和650℃瞬时性能、750℃持久时间以及700℃长期时效后的力学性能。
In a 35 Ni 15 Cr iron-based superalloy, γ’-Ni_3 (Al, Ti), M_3B_2, TiC, Y-Ti_2SC, β-NiAl, α-Ni_2AlTi, η-Ni_3Ti, σ and Layes phase. Aluminum, titanium and the γ ’phase number, size, mismatch and chemical composition have a strong impact. However, the ratio of titanium to aluminum mainly affects the mismatch degree and composition of γ ’phase, and has almost no effect on the number and size. The microstructures of Al, Ti and Ti after aging at 800 ° C (500 hours) and 700 ° C (5000 hours) also have significant effects. The Al + Ti contents of the σ or Laves phases are about 5% and about 4%, respectively. Aluminum, titanium and titanium-aluminum ratio and can significantly affect the room temperature and instantaneous performance of 650 ℃, 750 ℃ long-term and 700 ℃ long-term aging mechanical properties.