DIN Standards Committee Technology of Materials
Metallic powders - Test method for the determination of non-metallic inclusions in metal powders using a powder-forged specimen (ISO/DIS 13947:2023); German and English version prEN ISO 13947:2023
Abstract
This document specifies a metallographic method for determining the non-metallic inclusion level in metal powders using a powder-forged specimen. The test method covers repress powder-forged test specimens in which there has been minimal lateral flow (<1 %). The core region of the powder-forged test specimen must not contain porosity detectable at 100x magnification. This test method can also be used to determine the non-metallic inclusion content of powder-forged steel parts. However, in parts where there has been a significant amount of material flow, the near-neighbour separation distance needs to be changed, or the inclusion sizes agreed between the parties need to be adjusted. This test method is not suitable for determining the non-metallic inclusion level of parts that have been forged such that the core region contains porosity. At the magnification used for this test method, residual porosity is hard to distinguish from inclusions. Too much residual porosity makes a meaningful assessment of the inclusion population impossible. This test method can also be applied to materials that contain manganese sulphide (admixed or prealloyed), provided the near-neighbour separation distance is changed from 30 μm to 15 μm.
Begin
2023-01-02
WI
CSM11123
Planned document number
DIN EN ISO 13947
Project number
14500227
Responsible national committee
NA 145-01-06 AA - Powder metallurgy
Responsible european committee
Responsible international committee
ISO/TC 119/SC 2/WG 24 - Inclusion testing
draft standard
Metallic powders - Test method for the determination of non-metallic inclusions in metal powders using a powder-forged specimen (ISO/DIS 13947:2023); German and English version prEN ISO 13947:2023
2024-01
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