GB/T 4194-2017Creep testing, high temperature treatment and metallographic examination of the tungsten wire (English PDF)
钨丝蠕变试验、高温处理及金相检查方法
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
July 31, 2017
Implementation date
February 1, 2018
Scope
GB/T 4194-2017 is the English-translated version of 钨丝蠕变试验、高温处理及金相检查方法.
GB/T 4194-2017 is the Chinese standard "Creep testing, high temperature treatment and metallographic examination of the tungsten wire". Its scope clause reads: This standard specifies the tungsten filament creep test, high temperature treatment and metallographic examination methods.
This standard applies to the determination of residual tungsten filament creep elongation and tungsten creep test and high temperature treatment after the metallographic examination.
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Document preview — GB/T 4194-2017
National Standard of the People's Republic of China
- ICS
- 31.030
- Classification
- L 90
- Replacing
- GB/T 4194-1984
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- Foreword
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
1 Scope
This standard specifies the tungsten filament creep test, high temperature treatment and metallographic examination methods.
This standard applies to the determination of residual tungsten filament creep elongation and tungsten creep test and high temperature treatment after the metallographic examination.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version applies to this article
Pieces. For undated references, the latest edition (including all amendments) applies to this document.
GB/T 4181 tungsten wire
3 creep test, high temperature treatment and metallographic examination
3.1 creep test and high temperature treatment
3.1.1 Equipment, instruments, tools and materials
Requires the following equipment, instruments, tools and materials.
a) high temperature creep testing machine;
b) steel ruler (1000mm, accuracy 1mm);
c) micrometer (accuracy of 0.002mm);
d) heating device;
e) folding the mold;
f) cleaning tank g) NaOH (chemically pure).
3.1.2 Creep test
3.1.2.1 sample
phi1.25mm tungsten wire, the sample surface quality should meet the requirements of GB/T 4181, the diameter of (1.25 ± 0.01) mm.
3.1.2.2 Preparation of test specimens
According to the following procedure for sample preparation.
a) Cut the specimen to 418 mm long and ensure that both ends are not cleaved. Heat the tip to about 800 ° C with a heating device and insert it rapidly
Bending the mold into a small hook bent 90 °, at both ends of the small hook length of about 4mm and perpendicular to each other, as shown in Figure 1 shape;
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
Similar standards
Editions of GB/T 4194
| Edition | Title | Revision | Status |
|---|---|---|---|
| GB/T 4194-2017 | Creep testing, high temperature treatment and metallographic examination of the tungsten wire | current edition | Current |
| GB/T 4194-1984 | Creep testing, high temperature treatment and metallographic examination of the tungsten wire | previous edition | Superseded |
This page sells the current edition, GB/T 4194-2017. Earlier editions are listed for reference only.
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