Tungsten-nickel-iron high-density alloys with very high mechanical properties, and process for manufacturing these alloys

摘要

These alloys are characterised in that the alpha  phase of tungsten is in the shape of butterfly wings with dislocation cells between 0.01 and 1  mu m in size and the gamma  phase of the binder has a mean free path of less than 15  mu m. …??The process consists in subjecting the sintered and annealed product to at least three cycles of operations consisting, in each case in following the puddling by a heat treatment. …??The invention finds its application in the production of alloys which have a tensile strength of between 1300 and 2000 MPa and intended especially for use at very high stresses. …IMAGE…