GB/T 41706-2022 (English Version) PDF

Standard No.: GB/T 41706-2022
Language: Chinese, Available in English version
Release Date: 2022
Published By: General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
Latest: GB/T 41706-2022

Scope: This document specifies a metallographic method for determining the level of non-metallic inclusions in metallic powders using powder forged specimens. This measurement method requires that the powder forging sample has as little lateral flow as possible (<1%) during forging, and requires that the central area of the powder forging sample has no visible pores under the magnification of 100×. This document applies to the detection of non-metallic inclusion content in powder forging parts. In parts with a large amount of lateral flow of material, the separation distance between neighbors needs to be adjusted, or the size of inclusions that need to be adjusted can be determined through negotiation between relevant parties. This document does not apply to the determination of the level of non-metallic inclusions in internal porous forgings. Residual porosity was difficult to distinguish from inclusions during the scale-up of the test. Too much residual porosity makes inclusion distribution determination difficult. This document can be applied to the detection of materials containing manganese sulfide (pre-mixed or pre-alloyed). In order to meet the test of this type of material, the neighbor separation distance needs to be adjusted from 30 μm to 15 μm.

GB/T 41706-2022 history

2022 GB/T 41706-2022 Metallic powders—Test method for determination of non-metallic inclusions in metal powders for powder forging