GB/T 4184-2021 PDF English
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Tungsten-rhenium alloy wires
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| GB/T 4184-2002 | English | 439 |
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Tungsten-rhenium alloy wires
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| GB/T 4184-1984 | English | 239 |
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GB/T 4184-2021: Tungsten-rhenium alloy wires---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/GBT4184-2021
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 31.030
CCS L 90
Replacing GB/T 4184-2002
Tungsten-rhenium Alloy Wires
Issued on: DECEMBER 31, 2021
Implemented on: JULY 1, 2022
Issued by. State Administration for Market Regulation;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword... 3
1 Scope... 5
2 Normative References... 5
3 Terms and Definitions... 5
4 Requirements... 5
5 Test Methods... 8
6 Inspection Rules... 12
7 Packaging, Marking, Storage and Transportation... 13
Appendix A (normative) Determination of Rhenium Content in Tungsten-rhenium
Alloy - ICP Spectrometry... 15
Appendix B (normative) Accuracy of Wire Winding Machine... 18
Foreword
This document was drafted in accordance with the rules provided in GB/T 1.1-2020 Directives
for Standardization - Part 1.Rules for the Structure and Drafting of Standardizing Documents.
This document serves as a replacement for GB/T 4184-2002 Tungsten-rhenium Alloy Wires. In
comparison with GB/T 4184-2002, apart from structural adjustments and editorial
modifications, the main technical changes are as follows.
a) The “Normative References” is modified (see Chapter 2; Chapter 2 of Version 2002);
b) The designation W-5Re is added, and the specific categories and allowable upper
limits of impurity elements in tungsten-rhenium alloy wires are refined (see 4.1; 4.1
of Version 2002);
c) The requirements for “high temperature properties” are added (see 4.4);
d) The content of “linearity” is modified and the requirements for the diameter of the
curved ring are enhanced (see 4.5; 4.6 of Version 2002);
e) The content of “surface quality” is modified (see 4.6; 4.1 of Version 2002);
f) The requirements for “electrical resistivity” are added (see 4.8);
g) “Appraisal inspection” is added and general rules are specified (see 6.4);
h) The requirements for the “minimum length”, “bending property” and “winding into a
spool” of tungsten-rhenium alloy wires are deleted, and the relevant provisions in the
“packaging, storage and transportation” part are modified (see 7.1; 4.2.2, 4.4 and 4.8
of Version 2002).
Please be noted that certain content of this document may involve patents. The institution
issuing this document does not undertake the responsibility of identifying these patents.
This document was proposed by and shall be under the jurisdiction of National Technical
Committee 203 on Semiconductor Equipment and Materials of Standardization Administration
of China (SAC/TC 203).
The drafting organizations of this document. Chengdu Hongbo Industrial Co., Ltd.; China
Electronics Standardization Institute.
The main drafters of this document. Li Jian, Wang Jinsong, Cao Kewei, Sun Hongyun, He
Qingchun, Li Xiaojuan, Guan Qi.
The issuing of the previous versions.
---First issued in 1984 as GB/T 4184-1984 and first revised in 2002;
Tungsten-rhenium Alloy Wires
1 Scope
This document specifies the designations, requirements, test methods, inspection rules,
packaging, marking, transportation and storage of tungsten-rhenium alloy wires.
This document is applicable to the production of tungsten-rhenium alloy wires for electric light
source filaments, vacuum electron device hot wires, grid electrodes and supports.
2 Normative References
The contents of the following documents constitute indispensable clauses of this document
through the normative references in the text. In terms of references with a specified date, only
versions with a specified date are applicable to this document. In terms of references without a
specified date, the latest version (including all the modifications) is applicable to this document.
GB/T 228.1 Metallic Materials - Tensile Testing - Part 1.Method of Test at Room Temperature
GB/T 4324 (all parts) Methods for Chemical Analysis of Tungsten
YS/T 502 Determination of Rhenium in Tungsten-Rhenium Alloy - Diacetyl Oxime
Colorimetric Method
3 Terms and Definitions
This document does not have terms and definitions that need to be defined.
4 Requirements
4.1 Chemical Composition
In accordance with chemical composition, tungsten-rhenium alloy wires are divided into three
designations. W-1Re, W-3Re and W-5Re. The chemical composition of tungsten-rhenium alloy
wires shall comply with the provisions in Table 1.
Electrical resistivity 4.8 5.8
6.4.3 Disqualification judgment
If the sample under test passes the inspection of all items listed in Table 10, then, it is judged as
qualified. If it fails in the inspection of one or more items, then, it is judged as disqualified.
6.5 Quality Conformity Inspection
6.5.1 Inspection items
The quality conformity inspection items shall be carried out in accordance with Table 10.
6.5.2 Inspection batch
Products of the same designation, same raw materials, same process, same production batch
number and same production period are one inspection batch.
6.5.3 Sampling and qualification judgment
Group A and Group B are subject to 100% inspection and disqualified products are eliminated.
Group C inspection is carried out on one specimen randomly taken from each inspection batch.
If one or more results fail to comply with the requirements, double sampling shall be performed
in the inspection batch and the disqualified items shall be inspected. If one or more results still
fail to comply with the requirements, then, the batch will be judged as disqualified.
6.6 Re-inspection
The demand-side shall conduct re-inspection in accordance with this document within three
months from the date of receipt of the product. If the inspection result is inconsistent with the
product certificate or product quality certificate, an appraisal or inspection shall be jointly
carried out, or a third party recognized by both sides shall be entrusted to conduct an inspection.
If it still fails to meet the requirements, then, it shall be deemed disqualified.
7 Packaging, Marking, Storage and Transportation
7.1 Packaging, Storage and Transportation
Tungsten-rhenium alloy wire with a diameter 0.35 mm shall be evenly rewound on the wire
coil without local accumulation or the phenomenon of pressed wire being unable to be released.
The exposed wire head needs to be fixed, the surface shall be sealed with flint-glazed paper,
and then, loaded into a plastic cylinder. The material and specifications of the wire coil shall be
determined by negotiation between the supply-side and the demand-side.
When winding tungsten-rhenium alloy wire with a diameter > 0.35 mm, it shall be wound
into a coil and tied with soft metal wire in 3 to 4 sites to prevent the wire from bouncing open
Appendix A
(normative)
Determination of Rhenium Content in Tungsten-rhenium Alloy - ICP Spectrometry
A.1 Overview
The method provided in this Appendix is for the determination of rhenium in tungsten-rhenium
alloy. The mass fraction of rhenium ranges from 1% to 10%.
A.2 Method Summary
The specimens are decomposed by hydrogen peroxide and determined by inductively coupled
plasma emission spectrometer.
A.3 Reagents
A.3.1 Nitric acid. (1 + 1) analytically pure.
A.3.2 Hydrogen peroxide. mass concentration c is 1.10 g/mL.
A.3.3 Hydrochloric acid. (1+1) guaranteed reagent.
A.3.4 Rhenium standard solution. weigh-take 1.0000 g of metallic rhenium powder ( 99.99%)
into a 150 mL beaker, add 20 mL of hydrochloric acid (see A.3.3) and 5 mL of nitric acid (see
A.3.1), heat, until it is completely dissolved, cool to room temperature, transfer into a 1,000 mL
volumetric flask, use deionized water to dilute it to the scale, and mix it well. The rhenium mass
concentration c of this solution is 1,000 g/mL.
A.3.5 Pure tungsten solution. weigh-take 5.0000 g of metallic tungsten powder (99.99%) into
a 150 mL beaker, in several times, dropwise add 30 mL of hydrogen peroxide (see A.3.2), heat
at low temperature, until it is completely dissolved, add 10 mL of deionized water, boil, remove
and cool to room temperature. Transfer it to a 1,000 mL volumetric flask, use deionized water
to dilute it to the scale, and mix it well. The tungsten mass concentration c of this solution is
5,000 g/mL.
A.4 Instruments
Inductively coupled plasma emission spectrometer.
A.5 Specimens
The specimens shall be prepared into a state that is easy to dissolve.
A.6 Analytical Steps
A.6.1 Number of determinations
Perform two independent determinations and take the average value.
A.6.2 Test portion
Weigh-take 0.1 g of specimen, accurate to 0.0001 g.
A.6.3 Blank test
Carry out a blank test along with the test portion.
A.6.4 Determination
A.6.4.1 Place the test portion (see A.6.2) in a 150 mL beaker, use an appropriate amount of
deionized water to moisten it, dropwise add 6 mL of hydrogen peroxide (see A.3.2), heat at low
temperature, until the test portion is completely dissolved, add 10 mL of deionized water, boil,
remove and cool to room temperature. Transfer it to a 100 mL volumetric flask, use deionized
water to dilute to the scale, and mix it well.
A.6.4.2 Draw a working curve. respectively pipette 0.00 mL, 1.00 mL, 3.00 mL, 5.00 mL, 8.00
mL and 10.00 mL of the rhenium standard solution (see A.3.4) into a set of 100 mL volumetric
flasks, add 20.00 mL of the pure tungsten solution (see A.3.5), use deionized water to dilute it
to the scale, and mix it well. Ignite the plasma, wait for the instrument to stabilize, and then, at
a wavelength of 358.015 nm, in the sequence of increasing concentration, successively
determine and draw the working curve.
A.6.4.3 Determine the solution (see A.6.4.1) at a wavelength of 358.015 nm and obtain the
corresponding rhenium content based on the working curve.
A.7 Result Calculation
In accordance with Formula (A.1), calculate the mass fraction of rhenium.
Where,
wRe---the mass fraction of rhenium element;
c1---the mass concentration of the element under test in the specimen solution, expressed in
(g/mL);
c0---the mass concentration of the element under test in the sample blank solution, expressed in
(g/mL);
V---the volume of the solution under test, expressed in (mL);
m---the mass of the specimen, expressed in (g).
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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