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通过对Ni80Cr20锻造坯料进行挤压-冷拔-扩孔变形而获得无缝管,而后对Ni80Cr20无缝管进行不同变形量的冷轧变形,研究了不同轧制变形量对Ni80Cr20无缝管显微组织的影响。结果表明:挤压后的Ni80Cr20荒管具有单相奥氏体组织,且存在少量碳化物;荒管经冷拔-扩孔-固溶处理后获得Ni80Cr20无缝管,其奥氏体晶粒明显长大,碳化物基本溶解于基体中;Ni80Cr20无缝管在不同的冷轧变形后,随冷轧变形量的增加,显微组织呈明显的纤维化特征,经固溶处理后,其再结晶晶粒变小,获得了细小均匀的奥氏体组织。
Ni80Cr20 forging billet by extrusion - cold drawing - reaming deformation obtained seamless tube, and then Ni80Cr20 seamless tube deformation of different deformation of the cold rolling deformation of different amounts of Ni80Cr20 seamless microscopy The impact of the organization. The results show that the extruded Ni80Cr20 shortage tube has single-phase austenite structure with a small amount of carbides. Ni80Cr20 seamless tube is obtained by cold drawing-reaming-solution treatment of the bare tube, and the austenite grains are obviously And the carbides are basically dissolved in the matrix. After different cold rolling deformations, the Ni80Cr20 seamless tube shows obvious fibrosis characteristics with the increase of cold rolling deformation. After solution treatment, the recrystallization Smaller grains, obtained a small and uniform austenite.