GB/T 43096-2023 English PDF

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GB/T 43096-2023: Metallic powders - Determination of envelope-specific surface area from measurements of the permeability to air of a powder bed under steady-state flow conditions
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 43096-2023	404	Add to Cart	4 days	Metallic powders - Determination of envelope-specific surface area from measurements of the permeability to air of a powder bed under steady-state flow conditions	Valid

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Basic data

Standard ID: GB/T 43096-2023 (GB/T43096-2023)
Description (Translated English): Metallic powders - Determination of envelope-specific surface area from measurements of the permeability to air of a powder bed under steady-state flow conditions
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: H21
Classification of International Standard: 77.160
Word Count Estimation: 22,234
Date of Issue: 2023-09-07
Date of Implementation: 2024-04-01
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 43096-2023: Metallic powders - Determination of envelope-specific surface area from measurements of the permeability to air of a powder bed under steady-state flow conditions

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
ICS 77.160 CCSH21 National Standards of People's Republic of China Powder layer under steady flow conditions of metal powder Permeability test to determine external specific surface area Published on 2023-09-07 2024-04-01 Implementation State Administration for Market Regulation Released by the National Standardization Administration Committee

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1.Structure and Drafting Rules of Standardization Documents" Drafting. This document is equivalent to ISO 10070.2019 "Determination of external specific surface by powder layer permeability test under steady flow conditions of metal powder" product". Please note that some content in this document may be subject to patents. The publisher of this document assumes no responsibility for identifying patents. This document is proposed by the China Nonferrous Metals Industry Association. This document is under the jurisdiction of the National Nonferrous Metals Standardization Technical Committee (SAC/TC243). This document was drafted by. Youyan Additive Technology Co., Ltd., Beijing Youyan Powder New Materials Research Institute Co., Ltd., Central South University, Guangdong Province Institute of Materials and Processing of the Academy of Sciences, General Iron and Steel Research Institute Co., Ltd., Youyan Institute of Resources and Environmental Technology (Beijing) Co., Ltd., Beijing Steel Yangaona Technology Co., Ltd., Youyan Powder New Materials (Hefei) Co., Ltd. The main drafters of this document. Hu Qiang, Wang Linshan, Wang Rui, Zheng Fengshi, Zeng Jie, Tan Lixin, Wang Changjun, Qu Wei, Qu Jinglong, Jiang Zhi, Yang Xinyu, Li Nannan, Huang Zhifeng, Wang Juan, Liu Yu, Zhang Hongzhi, Liu Mingdong, Sun Haixia, Zheng Kaihong, Zhang Mengxing, Wang Limin. Powder layer under steady flow conditions of metal powder Permeability test to determine external specific surface area

1 Scope

This document specifies a method for measuring the air permeability and porosity of pressed metal powder layers and obtaining external specific surface area values. in steady state Under flow conditions, laminar air flow is used to determine the permeability of the powder layer at a pressure close to atmospheric pressure. This document does not cover the use of constant volume Method for measuring permeability. This document does not specify specific commercial equipment and corresponding test procedures. However, for the convenience of users, this article The document contains informative appendices (see Appendix A) intended to provide some practical information on three specific methods. If there are agglomerates of powder Like this, the measured external specific surface area results will be affected by the degree of agglomeration of the sample. If approved by the relevant parties, the agglomerated powder can be dispersed (See Appendix B). This document applies to all metal powders, including cemented carbide powders with a particle size not greater than 1000 μm, but is usually used for particles with a particle size of Particles from 0.2μm to 75μm. With permission from the interested parties, this method can also be used for particles with poor axial symmetry (such as flakes and fibers). This document does not apply to mixtures of different powders and powders containing binders or lubricants.

2 Normative reference documents

The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, the dated quotations For undated referenced documents, only the version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to this document. Note. GB/T 5314-2011 Powder sampling method for powder metallurgy (ISO 3954.2007, IDT)

3 Terms and definitions

The following terms and definitions apply to this document. 3.1 Powder layer density envelopedensity The ratio of the mass of the powder layer to the envelope volume (3.3). Note. When the particles contain pores that are not conducive to airflow through the powder layer, the density of the powder layer may be less than the theoretical density. 3.2 Powder layer outer specific surface area envelope-specificsurfacearea The external specific surface area of the powder measured by gas transmission method. 3.3 envelope volume envelopevolume The volume occupied by powder particles in the powder layer excluding interstitial holes (3.5). Note. In the gas permeation method, the envelope volume includes the volume of the solid material plus all pores that are not conducive to gas flow (closed pores, blind pores, micropores, surface micropores, surface pores, etc.) Surface roughness, etc.) volume. Since this volume cannot be measured by any known method, in this document the volume is equal to that determined using the hydrometry method. Effective volume. ......

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