Surface Melting of Rotating Bands

Abstract

The point at which a complete molten film is formed on the surface of projectile rotating bands is very important because, when it is formed, sliding becomes lubricated and friction determined by hydrodynamic considerations alone. Furthermore, beyond this point, wear of a particular band material is dependent only on the amount of heat transferred to it. The first formation of the molten surface film for projectiles with gilding metal bands was estimated by observing the location of the drop in the coefficient of friction. This was reached well before the bands were completely engraved in the case of a 155mm howitzer firing at low zones. It would be reached even more rapidly in the case of tank guns or artillery firing at higher zones.

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1975
Accession Number
ADA020318

Entities

People

  • Robert S. Montgomery

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Artillery
  • Ballistics
  • Bearings
  • Coefficients
  • Diameters
  • Films
  • Guns
  • Howitzers
  • Leading Edges
  • Materials
  • Plastic Explosives
  • Projectiles
  • Rotating Bands
  • Strain Gages
  • Tank Guns
  • Trailing Edges
  • Weapons

Readers

  • Metallurgy
  • Spectroscopy.
  • ballistics.