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GB/T 26055-2022 English PDF (GBT26055-2022)

GB/T 26055-2022 English PDF (GBT26055-2022)

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GB/T 26055-2022: Reproduced tungsten carbide powder

This document specifies the classification, technical requirements, test methods, inspection rules, marking, packaging, transportation, storage, accompanying documents, and order form contents of reproduced tungsten carbide powder. This document is applicable to reproduced tungsten carbide powder produced by the electrolytic process and using recycled cemented carbide as raw material.
GB/T 26055-2022
GB
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 77.160
CCS H 71
Replace GB/T 26055-2010
Reproduced tungsten carbide powder
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ISSUED ON: JULY 11, 2022
IMPLEMENTED ON: FEBRUARY 1, 2023
Issued by: State Administration for Market Regulation;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Terms and definitions ... 5
4 Categories ... 5
5 Technical requirements ... 5
6 Test methods ... 6
7 Inspection rules ... 6
8 Marking, packaging, transportation, storage, and accompanying documents ... 7 9 Order form contents ... 9
Reproduced tungsten carbide powder
1 Scope
This document specifies the classification, technical requirements, test methods, inspection rules, marking, packaging, transportation, storage, accompanying documents, and order form contents of reproduced tungsten carbide powder. This document is applicable to reproduced tungsten carbide powder produced by the electrolytic process and using recycled cemented carbide as raw material. 2 Normative references
The following documents contain the provisions which, through normative reference in this document, constitute the essential provisions of this document. For the dated referenced documents, only the versions with the indicated dates are applicable to this document; for the undated referenced documents, only the latest version (including all the amendments) is applicable to this document.
GB/T 1480 Metallic powders - Determination of particle size by dry sieving GB/T 3249 Test method for Fisher number of metal powders and related compounds GB/T 4324.12 Methods for chemical analysis of tungsten - Part 12: Determination of silicon content - Chlorization-molybdenum blue spectrophotometry
GB/T 4324.25 Methods for chemical analysis of tungsten - Part 25: Determination of oxygen content - Pulse heating inert gas fusion-infrared absorption method GB/T 5124.1 Methods for chemical analysis of hardmetals - Determination of total carbon content - Gravimetric method
GB/T 5124.2 Methods for chemical analysis of hardmetals - Determination of insoluble (free) carbon content - Gravimetric method
GB/T 5314 Powders for powder metallurgical purposes - Sampling
GB/T 26050 Hardmetals - Determination of contents of metallic elements by X-ray fluorescence - Fusion method
5.2 Particle size
Reproduced tungsten carbide powder shall be sifted through a sieve with an aperture size of 150 ??m, and the oversize powder shall not exceed 5% (mass fraction). The Fisher particle size of reproduced tungsten carbide powder shall not be greater than 4.0 ??m. 5.3 Appearance quality
The reproduced tungsten carbide powder is gray-black powder, and the particle size and color of the powder shall be uniform; it shall be dry and have no agglomeration and no visible impurities.
6 Test methods
6.1 Chemical composition
6.1.1 The determination of the total carbon content of the product shall be carried out in accordance with the provisions of GB/T 5124.1.
6.1.2 The determination of the free carbon content of the product shall be carried out in accordance with the provisions of GB/T 5124.2.
6.1.3 The determination of Co, Ni, Fe, and Ti contents of products shall be carried out according to the provisions of GB/T 26050.
6.1.4 The determination of the Si content of the products shall be carried out according to the provisions of GB/T 4324.12.
6.1.5 The determination of the O content of the products shall be carried out according to the provisions of GB/T 4324.25.
6.2 Particle size
The product shall be sifted according to the provisions of GB/T 1480, and the determination of Fisher particle size shall be carried out according to the provisions of GB/T 3249.
6.3 Appearance quality
The appearance quality of the product shall be inspected visually.
7 Inspection rules
7.1 Inspection and acceptance
accompanying documents
8.1 Marking
The outer packaging of products that have passed the inspection shall be marked with the following contents:
a) Supplier name;
b) Product name and grade;
c) Batch number;
d) Net weight.
8.2 Packaging
The product shall be packaged in polyethylene plastic bags, and each bag shall have a net weight of 50 kg; it shall be placed in a plastic packaging drum or iron drum and sealed with a cover, or it can be packed according to the requirements of the order form. 8.3 Transportation
The product shall be protected from rain and moisture during transportation, and the transportation vehicles shall be clean. During the handling process, it shall not be rolled, put upside down and violently bumped, and the sealed packaging of the product shall not be damaged.
8.4 Storage
The product shall be stored in a dry, ventilated place with no acid and no alkaline atmosphere to prevent oxidation; the storage period shall not exceed half a year. 8.5 Accompanying documents
Each batch of products shall be attached with accompanying documents, in addition to supplier information, product information, the number of this document, date of manufacture, or date of packaging, the following contents should be included. a) Product quality certificate, the contents are as follows:
??? The main performance of the product;
??? The quality certification obtained by the product, and various analysis and inspection results approved by the supplier?€?s technical supervision department. b) Product instructions include correct handling, use, storage methods, and so on.

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