本文研究了热等静压处理对三种铸造镍基高温合金的持久性能、瞬时拉伸性能和低周疲劳性能的影响。结果表明,热等静压处理可以显著提高持久寿命和塑性,改善瞬时拉伸性能,延长低周疲劳寿命。
The influence of HIP (hot isopressing) on the rupture, tensile and LCF properties of three wrought Ni-base superalloys has been investigated. The mieroporosity of these alloys may be substantially eliminated by the HIP technique: 100—120 MPa for 3h at 1150℃. After HIP, these superalloys of dense and homogeneous structure were produced as compared with conventionally casting process. Their rupture properties under different temperatures and stresses, tensile properties under different temperatures and LCF lives under different stresses may be remarkably improved for the notched and/or unnotehed specimens, as well the scattering bands of rupture and tensile properties may be evidently narrowed down.
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