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GB/T 40380.2-2021: Metallic powders - Determination of apparent density and flow rate at elevated temperatures - Part 2: Determination of flow rate at elevated temperatures
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Metallic powders - Determination of apparent density and flow rate at elevated temperatures - Part 2: Determination of flow rate at elevated temperatures
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GB/T 40380.2-2021
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Basic data | Standard ID | GB/T 40380.2-2021 (GB/T40380.2-2021) | | Description (Translated English) | Metallic powders - Determination of apparent density and flow rate at elevated temperatures - Part 2: Determination of flow rate at elevated temperatures | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | H21 | | Word Count Estimation | 10,114 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 40380.2-2021: Metallic powders - Determination of apparent density and flow rate at elevated temperatures - Part 2: Determination of flow rate at elevated temperatures
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Metallic powders - Determination of apparent density and flow rate at elevated temperatures - Part 2.Determination of flow rate at elevated temperatures
ICS 77.160
CCSH21
National Standards of People's Republic of China
Determination of loose density and flow rate of metal powder at high temperature
Part 2.Measurement of flow rate at high temperature
(ISO 18549-2.2009, IDT)
Released on 2021-08-20
2022-03-01 implementation
State Administration of Market Supervision and Administration
Issued by the National Standardization Management Committee
Foreword
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1.Structure and Drafting Rules of Standardization Documents"
Drafting.
This document is the second part of GB/T 40380 "Determination of Bulk Density and Flow Rate of Metal Powder at High Temperatures". GB/T 40380 has been issued
The following parts are distributed.
---Part 1.Determination of loose density at high temperature;
---Part 2.Determination of flow velocity at high temperature.
This document is equivalent to ISO 18549-2.2009 "Determination of the bulk density and flow rate of metal powder at high temperature Part 2.At high temperature
Determination of flow rate".
A chapter "Terms and Definitions" has been added to this document.
Please note that some of the contents of this document may involve patents. The issuing agency of this document is not responsible for identifying patents.
This document was proposed by China Nonferrous Metals Industry Association.
This document is under the jurisdiction of the National Non-ferrous Metals Standardization Technical Committee (SAC/TC243).
Drafting organizations of this document. Central South University, Nonferrous Metals Technology and Economic Research Institute Co., Ltd., Guangdong Academy of Sciences Industrial Analysis and Testing
Center, Xi'an Ouzhong Material Technology Co., Ltd., Northwest Nonferrous Metals Research Institute, Dongmu New Materials Group Co., Ltd., Xi'an Sailon Metal
Materials Co., Ltd., Central Iron and Steel Research Institute, Jiangsu Willary New Material Technology Co., Ltd.
The main drafters of this document. Huang Zhifeng, Ling Jirong, Wu Yanhua, Zeng Jie, Li Yang, Chen Hanyue, Zhu Zhen, Lin Min, Wang Liqing, Shen Lei, Feng Weili,
Sun Nianguang, Feng Zhihua, Luo Zhiqiang, Dong Shasha, Tang Yueyue, Ye Guochen, Zheng Lingzhi.
Introduction
For processes such as warm press forming and additive manufacturing, the loose packing density and flow rate of the powder at high temperature are very important performance indicators.
There are only test standards for bulk density and flow rate at room temperature, and there are no relevant national standards for the determination of bulk density and flow rate at high temperatures.
Standard or industry standard, GB/T 40380 aims to establish a complete and feasible method for measuring the bulk density and flow rate of powder at high temperature.
It consists of 2 parts.
---Part 1.Determination of loose density at high temperature;
---Part 2.Determination of flow velocity at high temperature.
This document can ensure the advancement of national standards, promote the progress of my country's testing technology, and ensure that industry practitioners are in production, application, and scientific research.
There are standards to be followed in the research and testing process, which fills the gap in the method of measuring the flow rate of metal powder at high temperature in my country.
Determination of loose density and flow rate of metal powder at high temperature
Part 2.Measurement of flow rate at high temperature
1 Scope
This document specifies two flow rate measurement methods for measuring a certain amount of heated powder mixture through a fixed aperture
Funnel time (flow rate), this powder is mainly suitable for warm-pressed steel powder.
Method A uses a funnel with a hole diameter of 2.5mm and a sample size of 50g, which is mainly based on the method specified in ISO 4490.This method only
It is suitable for powder mixture that can freely flow through 2.5mm aperture under heating.
Method B uses a funnel with a hole diameter of 5mm and a sample size of 150g.
The test temperature range of these two methods is 60℃~180℃, and the related parties can choose one of them after negotiation and determination.
2 Normative references
The contents of the following documents constitute the indispensable clauses of this document through normative references in the text. Among them, dated quotations
Only the version corresponding to that date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to
This document.
ISO 4490.2008 Metallic powder standard funnel method for determination of fluidity (Hall flow meter) [Metalicpowders-Determi-
nationofflowratebymeansofacalibratedfunnel(Halflowmeter)]
Note. GB/T 1482-2010 Standard funnel method for determination of metal powder fluidity (Hall flow meter) (ISO 4490.2001, IDT)
3 Terms and definitions
There are no terms and definitions that need to be defined in this document.
4 Instruments
4.1 Heat shield
The test should be carried out in a heat shield.
4.2 Funnel
The funnel has two apertures, one aperture is 2.5mm (method A), and the other is 5mm (method B). See Figure 1 and Figure 2 respectively.
The funnel should be made of non-magnetic, corrosion-resistant metal materials, and should have sufficient wall thickness and hardness to avoid deformation and excessive wear.
The inner surface should be polished.
4.3 Stand and base
The bracket and base are used to support the funnel, as shown in Figure 3 (Method A and Method B).
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