磷对 GH 169 合金静态力学性能影响的研究

EFFECT OF PHOSPHOROUS ON MECHANICAL BEHAVIOR OF SUPPERALLOY GH 169 (INCONEL 718)

通过含磷量０．０００５％～０．０１３％的小炉试验合金，较系统地研究了磷对ＧＨ１６９合金静态力学性能的影响。结果表明：磷对ＧＨ１６９合金的室温和高温拉伸强度基本无影响，而对拉伸塑性（特别是６５０℃）有明显影响，随着磷含量的增加，合金的拉伸塑性先降后增。更值得注意的是，随着磷含量的增加，合金的６５０℃持久寿命也显著提高。而且在磷含量０．００２９％～０．０１３％范围内，合金的６５０℃持久塑性与持久寿命一致升高。

This paper studies the effect of phosphorous on mechanical properties in the experimental alloys with the range of P contents from 0.0005% to 0.013%. Experimental results show that P has no obvious effect on room temperature (500℃ and 650℃) tensile strength. However, 650℃ tensile ductilities δ and ψ are raised with the increasing of P contents. The important fact is that stress rupture life and ductility at 650℃, 686MPa are both unnormally increased with the increasing of P content in the range of 0.0029%～0.013%.