GB/T 38974-2020 English PDF
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GB/T 38974-2020: Niobium and niobium alloy powder for additive manufacturing
---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT38974-2020GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 77.160;25.030 H 71 Niobium and niobium alloy powder for additive manufacturing ISSUED ON: JULY 21, 2020 IMPLEMENTED ON: JUNE 01, 2021 Issued by: State Administration for Market Regulation; Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword ... 3 1 Scope ... 4 2 Normative references ... 4 3 Technical requirements ... 4 4 Test method ... 6 5 Inspection rules ... 7 6 Marking, packaging, transportation, storage and quality certificate ... 8 7 Order form (or contract) contents ... 9 Niobium and niobium alloy powder for additive manufacturing1 Scope
This Standard specifies the technical requirements, test methods, inspection rules, marking, packaging, transportation, storage and quality certificates, and order (or contract) contents of niobium and niobium alloy powder for additive manufacturing. This Standard applies to niobium and niobium alloy powder for additive manufacturing prepared by processes such as plasma rotating electrode method, plasma atomization method, and plasma spheroidization method.2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. GB/T 1479 (all parts), Metallic powders - Determination of apparent density GB/T 1480, Metallic powders - Determination of particle size by dry sieving GB/T 1482, Metallic powders - Determination of flow time by means of a calibrated funnel (Hall flowmeter) GB/T 5162, Metallic powders - Determination of tap density GB/T 5314, Powders for powder metallurgical purposes - Sampling GB/T 15076 (all parts), Methods for chemical analysis of tantalum and niobium GB/T 19077, Particle size analysis. Laser diffraction methods YS/T 1297, Measuring method for sphericity ratio of titanium and titanium alloy powders3 Technical requirements
3.1 Chemical composition 5.4.2 If the product fails the appearance quality inspection, the bottle/bag shall be judged as unqualified.6 Marking, packaging, transportation, storage and quality
certificate 6.1 Marking The product packaging bottle/bag shall be marked (or labeled) as follows: a) Name of the supplier; b) Product name: c) Designation and category; d) Production batch number; e) Particle size range; f) Net weight and gross weight; g) Packaging date; h) Code of this Standard; i) Signs such as “Flammable”, “Fireproof”, “Moisture-proof”, “Upward”, and “No Tumbling”. 6.2 Packaging The product shall be packaged in clean metal bottles, plastic barrels or iron barrels, and shall be protected by inert gas or vacuum packed, or vacuum sealed in thick plastic bags. The environment shall be strictly controlled during the packaging process to avoid pollution. The product can be packaged in four specifications of mass: 1 kg, 2 kg, 5 kg and 10 kg, and can also be packaged as required by the buyer. The packaging container shall be ensured of its integrity during transportation, and shall not be damaged, damp, or expose the product to foreign contaminants. 6.3 Transportation The product shall be transported in a covered environment. It shall be protected from rain and moisture during transportation. Severe collision and mechanical extrusion are strictly prohibited. It shall be loaded and unloaded gently during handling, and shall not be inverted. It is strictly prohibited to approach fire and ignition sources. 6.4 Storage ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
