Standard Test Method for Nonmetallic Inclusion Content of Ferrous Powders Intended for Powder Forging (PF) Applications

Importancia y uso:

4.1 The extensive porosity present in pressed and sintered ferrous materials masks the effect of inclusions on mechanical properties. In contrast, the properties of material powder forged to near full density are strongly influenced by the composition, size, size distribution, and location of nonmetallic inclusions.

4.2 The test for nonmetallic inclusions in powder forged steels is useful as the following:

4.2.1 Characteristic to classify or differentiate one grade of powder from another.

4.2.2 Means of quality comparison of powders intended for powder forging, lot to lot.

4.3 Significant variations in nonmetallic inclusion content will occur if:

4.3.1 The powder used to form the test specimen does not meet powder forging quality standards for nonmetallic inclusion content.

4.3.2 Processing of the powder forged test specimen has been carried out under conditions that do not permit oxide reduction or allow oxidation of the test specimen, or both.

Subcomité:

B09.11

Referida por:

B0848_B0848M-21

Volúmen:

02.05

Número ICS:

77.040.99 (Other methods of testing metals)

Palabras clave:

nonmetallic inclusions; powder forged (PF) steel parts ;