Standard Test Method for Green Strength of Specimens Compacted from Metal Powders

Importancia y uso:

5.1 The green strength value determined under the conditions specified by this test method is influenced by the characteristics of the powder, how it compacts under the specified conditions (that is, the particle to particle bonding that exists following compacting), and the lubrication system used.

5.2 Knowledge of the green strength value is useful to the production, characterization, and utilization of metal powders in the manufacture of PM structural parts and bearings.

5.3 The test for green strength of a compacted metal powder can be used to:

5.3.1 Relate the resistance of a pressed compact to breakage or damage due to handling.

5.3.2 Compare the quality of a metal powder or powder mixture from lot to lot.

5.3.3 Determine the effect of the addition of a lubricant or other powders to a base powder.

5.3.4 Evaluate powder mixing or blending variables.

5.4  Factors that are known to influence the green strength of a metal powder are particle shape, particle size distribution, and compressibility of the metal powder.

5.5 The amount and type of lubricant or other additives and the mixing procedures have a strong effect on the green strength of specimens produced from metal powder mixtures.

Subcomité:

B09.02

Referida por:

B0925-15R22, B0528-16R20E01

Volúmen:

02.05

Número ICS:

77.160 (Powder metallurgy)

Palabras clave:

constant loading beam device; green strength; PM; powder metallurgy; transverse strength; unsintered compact ;