钨基高密度合金的静液挤压形变强化研究

Study of Deformation Strengthening to Tungsten Alloys by Hydrostatic Extrusion

采用静液挤压工艺对91W-Ni-Fe 合金进行了静液挤压变形强化,研究了91 钨合金经静液挤压变形之后其显微组织、力学性能与挤压变形量之间的关系。结果表明:钨颗粒长径比随挤压变形量的增大而增大,钨颗粒的有效连接度随挤压变形量的增大而减小;钨合金的强度随挤压变形量的增大而增加,其增加的幅度随挤压变形量的增大而减小,而延伸率和断面收缩率则随挤压变形量的增大而不断下降。

Research about the 91 tungsten alloy deformed by hydrostatic extrusion is carried out. The relations between the microstructures, mechanical properties of the 91 tungsten alloy after deformation and the deformation amount were studied. The results show that the ratio of the long-short axis of tungsten particles and the strength of tungsten alloys increase along with the increase of the deformation amount, the valid contiguity of tungsten particles and the elongation ratio and contraction ratio of area of tungsten alloys decrease along with the increase of the deformation amount. Both the increment and the decrement become smaller and smaller along with the increase of the hydrostatic extrusion deformation amount.