Alloy VNM 3-2
Designation
| Name |
The value |
| Designation GOST Cyrillic |
ВНМ 3-2 |
| Designation GOST Latin |
BHM 3-2 |
| Transliteration |
VNM 3-2 |
| The chemical elements |
ВNiCu 3-2 |
Description
Alloy VNM 3−2 is used: for the manufacture of parts of cylinders, sleeves, slozhnofigurnye workpieces with curved surfaces Central electrodes, rotors, gyroscopes, inertial masses and loads, rationalwiki electrodes, hoppers shaped charges, biological protection from gamma radiation, parts of gamma-apparatuses.
Note
Powder heavy tungsten-Nickel-copper alloy.
Standards
| Name |
Code |
Standards |
| Solid alloys, metal-ceramic products and powders, metal |
В56 |
TU 48-19-238-85 |
| Non-ferrous metals, including rare metals, and their alloys |
В51 |
TU 48-19-266-77, TU 48-19-90-90 |
Chemical composition
| Standard |
Ni |
Cu |
W |
| TU 48-19-90-90 |
2.9-3.4 |
1.6-2.1 |
The rest |
W is the basis.
According to TU 48-19-90-90 the chemical composition is given for alloy BEM 3-2. The mass fraction of the components is indicated for the preparation of the mixture and it is not possible to control the workpieces.
Mechanical characteristics
| sT|s0,2, MPa |
σB, MPa |
d5, % |
kJ/m2, кДж/м2 |
| The product of the powder sintered |
| 620-630 |
700-720 |
3-4 |
196-294 |
Description mechanical marks
| Name |
Description |
| sT|s0,2 |
Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2% |
| σB |
Limit short-term strength |
| d5 |
Elongation after rupture |
| kJ/m2 |
Toughness |
Physical characteristics
| Temperature |
r, кг/м3 |
| 20 |
17600-18100 |
A description of the physical symbols
| Name |
Description |
| r |
Density |
| l |
Coefficient of thermal conductivity |
| R |
UD. the resistivity |
Technological properties
| Name |
The value |
| Microstructure |
The microstructure of the alloy to be biphasic, consisting of a solid solution based on tungsten and a matrix consisting of a solid solution based on Nickel and copper. |
| Frost resistance |
Details of the alloy produced by powder metallurgy method, including hydrostatic extrusion, sintering (impregnation) in the environment of hydrogen and vacuum annealing. In the process of being sintered at 1350-1500 °C in the presence of a liquid phase occurs recrystallization of the tungsten powder with the formation of nearly spherical particles, ten times greater than the particle size of initial powder. |
