针对GH4169合金中小圆轧制棒材边缘存在扁长晶及因δ相形貌、分布不合格造成缺口持久敏感问题进行了深入的研究。研究结果表明:通过合理轧制工艺的控制,采用双排横列式轧机一火次轧制出边缘到中心均匀的组织,晶粒度细于7级,无缺口持久敏感的合格GH4169合金棒材。 Aiming at the existence of prolate and long grain on the edge of the small round rolled bar of GH4169 alloy, the indentation long-sensitive problem due to the δ-phase morphology and the unqualified distribution was studied deeply. The results show that: through the control of reasonable rolling process, the double-row horizontal rolling mill is used for the first-fire rolling to the edge to the center of the uniform structure, the grain size is less than 7 grade, no indentation durable sensitive GH4169 alloy bar.