钨合金轧制变形强化的组织与性能研究

Microstructure and mechanical property of rolling strengthened tungsten alloy

选用95WNiFe高密度合金,进行了系列轧制试验,对不同轧制变形量的材料进行金相分析,分析材料内部轧制变形机理,同时对不同变形量的材料分别从纵向、横向取样进行力学性能测试,考察轧制变形量对材料力学性能的影响。结果表明:钨合金经过轧制变形后内部钨颗粒呈纤维状,粘结相均匀分布在钨颗粒之间;随着轧制变形量的增大,钨合金抗拉强度明显增高,延伸率降低,当变形量达到89.9%时,抗拉强度达到1 385 MPa,延伸率降到3%。

The microstructure and mechanical properties of cold rolled 95W tungsten alloy were studied.The strength properties were tested longitudinally and transversely to investigate the effect of rolling deformation on the material property.The results show that increase of rolling deformation level leads to fibrous microstructures,strength improvement and elongation reduction.The microstructure in rolled tungsten alloy shows that tungsten particles turn to be fibrous and the binding phase distributes homogeneously around tungsten particles.At 89.9% deformation level,tensile strength of 95W is 1 385 MPa,elongation is 3%.