Standard Test Methods for Density of Compacted or Sintered Powder Metallurgy (PM) Products Using Archimedes’ Principle

Importancia y uso:

5.1 The volume of a complex shaped PM part cannot be measured accurately using micrometers or calipers. Since density is mass per unit volume, a precise method for measuring the volume is needed. Archimedes’ principle may be used to calculate the volume of water displaced by an immersed object. For this to be applicable to PM materials that contain surface connected porosity, the surface pores are sealed by oil impregnation or some other means.

5.2 The green density of compacted parts or test pieces is normally determined to assist during press set-up, or for quality control purposes. It is also used for determining the compressibility of base powders, mixed powders, and premixes.

5.3 The sintered density of sintered PM parts and sintered PM test specimens is used as a quality control measure.

5.4 The impregnated density of sintered bearings is normally measured for quality control purposes as bearings are generally supplied and used oil-impregnated.

Subcomité:

B09.04

Referida por:

B0823-20, B0925-15R22, B0331-20, B0438-21, B0312-20, A0839-15R23, B0883-24, A0904-20, A0811-15R22, B0595-21, B0988-18R22, B0311-22, B0610-23, B0783-19, B0439-21, F3637-23

Volúmen:

02.05

Número ICS:

77.160 (Powder metallurgy)

Palabras clave:

density; green density; impregnated density; PM products; powder metallurgy products; sintered density;