Tungsten Alloy Large Ring

Model Number: C39 Brand Name: CHENTIAN Key Specifications/Special Features: Apply to military industry, such as armor piercerTungsten heavy alloysillustrate the advantages of micro encapsulated powdersBrief background of thisalloy system followsTungsten heavy alloysgenerally are refractory metal, which have two-phase composites consisting of W-Ni- Fe or W-Ni- Cu or even W-Ni-Cu-Fe, some tungsten alloy is added Co, Mo and CrThey have very high melting point and have a density twice that of steel and are more than 50% heavier than lead

Tungstencontent in conventional heavy alloys varies from 90 to 98 weight percent and is the reason for their high density (between 16.5 and 18.75 g/cc)

Nickel, iron and copper serve as a binder matrix, which holds the brittletungstengrains together and which makes alloys ductile and easy to machine

Nickel-iron is most popular additive, in a ratio of 7Ni:3Fe or 8Ni:2Fe (weight ratio)

Conventional processing route fortungsten heavy alloysincludes mixing the desired amount of elemental powders, followed by cold pressing and liquid phase sintering to almost full density

Matrix alloy melts and takes some tungsten into solution during liquid phase processing, resulting in a microstructure through which large tungstengrains (20–60m) are dispersed in the matrix alloy

As-sintered material often is subjected to thermo mechanical processing by swaging and aging, which results in increased strength and hardness in the heavy alloys

Majority of current uses for WHAs (tungsten heavy alloys) are best satisfied with W-Ni-Fe system

Alloys such as 93W-4.9Ni-2.lFe and 95W-4Ni-lFe represent common compositions

Addition of cobalt to a W-Ni-Fe alloy is a common approach for slight enhancement of both strength and ductility

Presence of cobalt within the alloy provides solid-solution strengthening of the binder and slightly enhanced tungsten-matrix interfacial strength

Cobalt additions of 5 to 15% of the nominal binder weight fraction arc most common