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GB/T 4194-2017: Creep testing, high temperature treatment and metallographic examination of the tungsten wire
Status: Valid GB/T 4194: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 4194-2017 | English | 119 |
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Creep testing, high temperature treatment and metallographic examination of the tungsten wire
| Valid |
GB/T 4194-2017
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| GB/T 4194-1984 | English | 159 |
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2 days [Need to translate]
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Creep testing, high temperature treatment and metallographic examination of the tungsten wires
| Obsolete |
GB/T 4194-1984
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PDF similar to GB/T 4194-2017
Basic data | Standard ID | GB/T 4194-2017 (GB/T4194-2017) | | Description (Translated English) | Creep testing, high temperature treatment and metallographic examination of the tungsten wire | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | L90 | | Classification of International Standard | 31.030 | | Word Count Estimation | 6,673 | | Date of Issue | 2017-07-31 | | Date of Implementation | 2018-02-01 | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | GB/T 4194-2017: Creep testing, high temperature treatment and metallographic examination of the tungsten wire
---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.
Creep testing, high temperature treatment and metallographic examination of the tungsten wire
ICS 31.030
L90
National Standards of People's Republic of China
Replacing GB/T 4194-1984
Tungsten wire creep test, high temperature treatment and metallographic examination methods
Creeptesting, hightemperaturetreatmentandmetalographicexamination
2017-07-31 Posted
2018-02-01 implementation
General Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
China National Standardization Administration released
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard replaces GB/T 4194-1984 "tungsten filament creep test, high temperature treatment and metallographic examination methods." And GB/T 4194-1984
The main changes are as follows.
--- Remove the test machine model (see 1.1.1);
--- Increasing the diameter requirements, and the measurement of diameter micrometer accuracy from 0.01mm to 0.002mm (see 3.1);
--- Elevator current speed quantization (see 3.1);
--- Clean the tungsten surface graphite milk with sodium hydroxide from pure to pure (see 3.1);
--- Vacuum units from mmHg to Pa (see 3.1);
--- High temperature treatment specimen diameter nominal value from 0.40mm to 0.39mm (see 3.1.3);
--- Modify the insulation current during high temperature treatment, and increase the fuse test to get the fusing current of the tungsten wire sample (see 3.1.3);
--- Clearly indicate the longitudinal cross-section of the wire material microstructure examination (see 3.2);
--- Metallographic samples inlaid solder from PbSn to AgSn (see 3.2.2);
--- Metallographic sample polishing and etching, increase annotation, as long as the same effect can be achieved, you can use other methods of polishing and etching (see
3.2.2).
Please note that some of this document may be patentable. The issuing agencies of this document do not bear the responsibility of identifying these patents.
This standard by the People's Republic of China Ministry of Industry and Information Technology (E) centralized.
This standard by the Chengdu Rainbow Industry Co., Ltd. is responsible for drafting.
The main drafters of this standard. Wang Jinsong, Liu Yun, Zhao Denghua.
This standard replaces the standards previously issued as.
--- GB/T 4194-1984.
Tungsten wire creep test, high temperature treatment and metallographic examination methods
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
φ1.25mm 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;
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