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Technological innovation

Technological innovation

The influence of annealing process of tungsten copper alloy

As is known to all, annealing is an important technology of metal materials processing, through the annealing process, can release material non equilibrium stored energy, improve the comprehensive performance of material, grasp the annealing temperature and time, can greatly improve the performance of materials and from crystal to grow up.


After annealing, the copper atoms on the surface of the finished material particle dispersion migration, make the porosity of the sintered body spheroidizing and narrow, reduced the number of pore, material density is also improved, therefore, the density will increase; Annealing, with the increase of milling time, the small particles will not only, particles liquidity, the better, the higher density, lower phonon scattering, and W, Cu distribution more uniform, composition segregation, phonon increased free path, and thermal conductivity also gradually enhanced; Increased after annealing, the electron scattering degree is small, the movement of free electrons free path, the resistance decreases, Cu atomic orderly distribution, so as to make the electrical conductivity was improved; After annealing, the material retained within the internal stress release greatly, so as to make the material become soft, hardness decrease; After annealing, the residual pore narrow, make material can more freedom for the thermal deformation, reduce composite material produces thermal stress concentration, improve material geometric stability, so as to make the thermal expansion coefficient reduced.