Tungsten Alloy Swaging

Tungsten alloy materials need to be heated by 600~800℃ before swaging . The conventional swaging deformation amount ranges from 10% to 15%. The maximum deformation generally is not more than by 25%~30%. Otherwise, tungsten alloy materials cause breakage easily. Tungsten alloy materials need relief annealing after being forged. The rang of annealing temperature is from 500℃ to 1100℃. Usually, heating, swaging and annealing are treated as a cycle.

The swaging working hardening tungsten alloy materials have the phenomenon of inhomogeneous mechanical property. The intensity, elongation and hardness of core differs form the intensity, elongation and hardness of surface quite. The reason is that metal begins to deform and extent is increasing gradually from coning area to sizing area. In sizing area, the metal only endures small deformation. The deforming extent of metal reach maximum in coning area and transition section of sizing area. For that, the deforming speed difference of tungsten alloy materials increases from the entrance to exist of coning area. That results in additional flexion deformity on surface of metal.


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