GB/T 1481-2022 English PDF

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GB/T 1481-2022: Metallic powders, excluding powders for hardmetals - Determination of compressibility in uniaxial compression
Status: Valid

GB/T 1481: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 1481-2022	194	Add to Cart	3 days	Metallic powders, excluding powders for hardmetals - Determination of compressibility in uniaxial compression	Valid
GB/T 1481-2012	394	Add to Cart	3 days	Metallic powders (excluding powders for hard metals) -- Determination of compressibility in uniaxial compression	Obsolete
GB/T 1481-1998	359	Add to Cart	3 days	Metallic powders (excluding powders for hardmetals)--Determination of compressibility in uniaxial compression	Obsolete
GB/T 1481-1984	RFQ	ASK	3 days	Metallic powders (excluding powders for hardmetals)--Determination of compressibility in uniaxial compression	Obsolete

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Basic data

Standard ID: GB/T 1481-2022 (GB/T1481-2022)
Description (Translated English): Metallic powders, excluding powders for hardmetals - Determination of compressibility in uniaxial compression
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: H16
Word Count Estimation: 10,157
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 1481-2022: Metallic powders, excluding powders for hardmetals - Determination of compressibility in uniaxial compression

---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.
Metallic powders, excluding powders for hardmetals - Determination of compressibility in uniaxial compression ICS 77.160 CCSH16 National Standards of People's Republic of China Replacing GB/T 1481-2012 Metal powder (excluding cemented carbide powder) Determination of compressibility in uniaxial pressing (ISO 3927.2017, IDT) Published on 2022-07-11 2023-02-01 Implementation State Administration for Market Regulation Released by the National Standardization Administration

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" drafted. This document replaces GB/T 1481-2012 "Determination of compressibility of metal powders (excluding cemented carbide powders) in uniaxial pressing". Compared with GB/T 1481-2012, except for structural adjustment and editorial changes, the main technical changes are as follows. a) Changed the allowable deviation of upper die punch and lower die punch (see Figure 1, Figure 2, Figure 1, Figure 2 of the.2012 edition); b) The accuracy of the balance is changed from "±0.01g" to "±0.001g" (see 6.3, 4.3 of the.2012 edition); c) The dimensional measurement accuracy is changed from "±0.01mm" to "±0.005mm" (see 6.4, 4.4 of the.2012 edition). This document is equivalent to ISO 3927.2017 "Determination of compressibility of metal powders (excluding cemented carbide powders) in uniaxial pressing". Please note that some content of this document may be patented. The issuing agency of this document assumes no responsibility for identifying patents. This document is proposed by China Nonferrous Metals Industry Association. This document is under the jurisdiction of the National Nonferrous Metals Standardization Technical Committee (SAC/TC243). This document is drafted by. Shenzhen Zhucheng Technology Co., Ltd., Northwest Nonferrous Metal Research Institute, Beijing Youyan Powder New Material Research Institute Co., Ltd., Xi'an Sailong Metal Materials Co., Ltd., General Iron and Steel Research Institute, Industrial Testing and Analysis Center of Guangdong Academy of Sciences, Central South University Xue, Antai Tianlong Tungsten and Molybdenum Technology Co., Ltd. The main drafters of this document. Kang Jun, Tan Ping, Zhang Yue, Yao Yanbin, Zhou Yonggui, Zhao Guoming, Hu Qiang, Wang Rui, Li Zengfeng, Zhu Jilei, He Weiwei, Luo Zhiqiang, Dong Shasha, Duan Wei, Liu Yingkun, Zeng Jie, Huang Xin, Li Ming. This document was first published in 1984, revised for the first time in.1998, and revised for the second time in.2012, this time being the third revision. Metal powder (excluding cemented carbide powder) Determination of compressibility in uniaxial pressing

1 Scope

This document specifies a method for determining the compressibility of metal powders when subjected to uniaxial pressing in a closed mold under specified conditions. This document does not apply to carbide powders.

2 Normative references

There are no normative references in this document.

3 Terms and Definitions

There are no terms and definitions that need to be defined in this document.

4 symbols

The following symbols apply to this document (see Table 1). Table 1 Symbols Symbol Definition Unit ρP Compressibility ag/cm3 m compact mass g V compact volume cm3 a If the compressibility is measured at a single pressure, for example at 400N/mm2, the symbol is written as ρP(400).

5 Principles

The powder is uniaxially pressed with bidirectional pressure in a closed die. Powder samples can be pressed at a specified single pressure, or can be Pressed under a specified set of pressures. After removing the compact from the mold, the density of the compact is measured. Density values obtained at a single pressing pressure indicating the compressibility of the powder at a specified pressure; obtained at a set of pressing pressures A set of density values can be used to draw the powder compressibility curve, that is, the relationship between density and pressing pressure.

6 Equipment

6.1 Mold The die material is made of hard alloy or tool steel, and the die punching is divided into cylindrical die punching and rectangular die punching. Cylindrical die punching can extrude a diameter of ......

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