METHOD FOR PRODUCING OBJECTS FROM IRON-COBALT-MOLYBDENUM/TUNGSTEN-NITROGEN ALLOYS

摘要

The disclosure relates to a production of a semi-finished product for a manufacturing of objects, particularly tools, from a precipitation-hardenable alloy having a composition in wt. % of Co=15.0 to 30.0, Mo up to 20.0, W up to 25.0, Fe and manufacturing-specific impurities as a remainder. To achieve an economical, highly precise production of objects or tools of the above alloy with reduced effort, it is provided to prevent a formation of ordered structures of the Fe atoms and Co atoms in the matrix of the type (Fe+(29×Co))+approximately 1 wt. % Mo of the semi-finished product by a thermal special treatment, to thus improve a workability of the material.

主权项

1. A semi-finished product for producing objects or tools from a precipitation-hardenable alloy having a chemical composition in wt. % comprising:Cobalt (Co) =15.0 to 30.0,Molybdenum (Mo) =up to 10.0,Tungsten (W) =up to 25.0,(Mo + W/2) =10.0 to 22.0,Nitrogen (N) =0.005 to 0.12, and
Iron (Fe) and manufacturing-specific impurities as a remainder, wherein the semi-finished product comprises intermetallic phases of a type (FeCo)6(Mo+W/2)7 in a matrix of a type (Fe+(29×Co))+approximately 1 wt. % Mo, wherein, in the matrix, a formation of an Fe—Co ordered structure is prevented to a large extent, and wherein the semi-finished product has a hardness of under 40 HRC, an impact bending work of unnotched samples of greater than 16.0 J, and an area reduction at fracture of greater than 6.5% in a tensile test.