Alloy VNM 3-2

  • Tungsten B (VA)
  • Tungsten BM
  • Alloy VNZH 7-3
  • Alloy VNZh-90
  • Alloy VNZh-95
  • Alloy VNZh-97 (VNZh 97.5)
  • Alloy VNM 3-2
  • Tungsten VRN
  • Tungsten VT-10
  • Tungsten VT-15
  • Tungsten BT-30
  • Tungsten BT-50
  • Tungsten BT-7
  • Alloy SVI-1

    • Designation

    Name The value
    Designation GOST Cyrillic ВНМ 3-2
    Designation GOST Latin BHM 3-2
    Transliteration VNM 3-2
    By 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
    Hard alloys, ceramic-metal products and metal powder В56 TU 48-19-238-85
    Non-ferrous metals, including rare, 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 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 properties

    sT|s0,2, MPa σU, MPa d5, % KCU, kJ/m2
    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%
    σU Limit short-term strength
    d5 Elongation after rupture
    KCU Toughness

    Physical characteristics

    Temperature r, kg/m3
    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 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.