Standard Practice for Detection of Large Inclusions in Bearing Quality Steel by the Ultrasonic Method

Importancia y uso:

6.1 Comparison with Other Inclusion Rating Methods—Because the test is performed on a volumetric rather than a surface-examination basis, the ultrasonic method is inherently better able to detect infrequently occurring large inclusions or clusters of small inclusions than eddy current, magnetic particle, microscopical, or macroscopic examination procedures.

6.2 Limitation of Inclusion Size and Type—A limitation of the method is that it will not detect all inclusions. Inclusion chemistry, size, shape, location, and distribution may limit the ability of the method to provide indications distinct from those generated by the surrounding metallurgical structure. The recommended practice is only meaningfully applicable to examination of steel wherein the inclusion size and type are within the detection capabilities of the method. For steel wherein inclusion size, dispersion, and chemistry prevent optimum inclusion detection by ultrasonics, microscopical methods detailed in Test Methods E45 may be applied.

Subcomité:

A01.28

Referida por:

A1089_A1089M-14R20

Volúmen:

01.05

Número ICS:

77.040.20 (Non-destructive testing of metals)

Palabras clave:

bearing steel; cleanliness; nondestructive examination; steel; ultrasonic testing;