铜含量对热挤压致密W-Cu合金组织性能的影响

The influence of percentage composition of Cu on the properties of W-Cu alloy produced by hot extrusion

通过对不同铜含量（Cu质量分数20％～50％）的W—Cu混合粉末进行热挤压．获得了具有不同成分配比的W—Cu合金，并研究了铜含量对热挤压坯料组织和性能的影响．结果表明，随着铜含量的增加，热挤压坯料的相对密度增加，同时相对导电率、相对热导率和硬度值也提高．当铜含量比较低（Cu质量分数20％～30％）时，挤压坯中的钨相出现微小变形．当铜含量比较高（Cu质量分数40％～50％）时，挤压过程中钨相形态基本不发生改变，主要是铜相变形．

In this paper, W-Cu alloys with different percentage composition of Cu have been obtained by hot extrusion. The experimental results show that the relative density, hardness,relative specific conductance and heat conductivity of the billets are increased with increasing percentage composition of Cu. When the percentage composition of Cu is low （20-30mass%）,a little deformation was observed in W phase. When the percentage composition of Cu is high （40-50mass%）,little deformation appeared in W phase, while main deformation occurred in Cu phase.