CAJ | 학술논문

研究了P含量对细晶GH761合金组织和性能的影响.结果表明:P含量在0.0007%--0.040%(质量分数)之间时,对合金的室温和650℃拉伸性能影响不大,但显著影响650 ℃/690 MPa下的持久性能和700℃/550 MPa下的蠕变性能.P含量在0.023%左右可成倍提高细晶合金的持久寿命,降低蠕变速率.细晶化和P微合金化相结合的方法可以在显著提高合金拉伸强度和塑性的同时,保持合金优良的持久和蠕变性能,从而全面优化合金的综合性能.
연구료P함량대세정GH761합금조직화성능적영향.결과표명:P함량재0.0007%--0.040%(질량분수)지간시,대합금적실온화650℃랍신성능영향불대,단현저영향650 ℃/690 MPa하적지구성능화700℃/550 MPa하적연변성능.P함량재0.023%좌우가성배제고세정합금적지구수명,강저연변속솔.세정화화P미합금화상결합적방법가이재현저제고합금랍신강도화소성적동시,보지합금우량적지구화연변성능,종이전면우화합금적종합성능.
Effect of P content on the microstructure and mechanical properties of fine-grained GH761 alloy was studied.The results showed that no obvious effect on the tensile properties of finegrained GH761 alloy WaS observed when P content in GH761 alloy was below 0.040%(mass fraction).However,P influenced the stress rupture and creep properties greatly.The peak value of the life at 650℃and 690 Mpa appeared around 0.023%P.In comparison with that of the alloy with 0.0007%P,the life increased more than 2 times.At the same time,the creep rate of the alloy with 0.023%P is also the 10west in a11 of alloys.P iS beneficial to the mechanical properties of fine-grained GH761 alloy by improving the precipitation at grain boundaries and impeding the disclocation movement.The overall properties of GH761 alloy can be improved by grain refining and appropriate amount of P addition.