METHOD OF MAKING ARTICLES FROM ALLOYS OF IRON-COBALT-MOLYBDENUM/TUNGSTEN-NITROGEN Russian patent published in 2016 - IPC C22C30/00 C22C33/02 B22F3/15 B22F3/24 C21D6/02 

FIELD: metallurgy.

SUBSTANCE: invention relates to metallurgy, particularly, to production of high-precision articles. Workpiece for tool is made from dispersion-hardened alloy of Fe-Co-Mo/W-N, containing, wt%: cobalt 15.0-30.0, molybdenum up to 20.0, tungsten up to 25.0, (Mo+W/2) 10.0 to 22.0, nitrogen 0.005 to 0.12, iron and impurities - balance. Structure of alloy consists of intermetallic phases type (FeCo)₆(Mo+W/2)₇ in a matrix of type (Fe+(29xCo))+1 wt% Mo. Matrix has unordered atomic structure of Fe and Co. Alloy has hardness less than 40 HRC, impact viscosity K measured during operation of impact for samples without cuts, higher than 16.0 J and relative elongation Ac with tensile test greater than 6.5 %. Method of making workpiece includes making an alloy of Fe-Co-Mo/W-N by powder metallurgy, deformation thereof into a workpiece, soft annealing and thermal treatment by heating, annealing and further cooling at a rate of λ cooling less than 3(λ<3).

EFFECT: workpiece is obtained with improved characteristics of viscosity, relative elongation and improved processability for further production of high-precision articles.

4 cl, 4 dwg