Tungsten-Thorium-Rhenium wires for vacuum tubes

SJ 1587-1980 Thoriated Tungsten Rhenium Wire for Vacuum Devices SJ1587-1980 Standard Download Decompression Password: www.bzxz.net

Standard of the Fourth Machinery Industry Department of the People's Republic of China
Needle tungsten wire for vacuum devices
SJ1587-
This standard is used for the manufacture of warp-spinning chains for vacuum devices, and the needle-drawn wire should be drawn. I. Brand and purpose
1. The brand and type of the hook wire should comply with the provisions of Yuan 1. Brand
WT,--R. II. Varieties and specifications
2. The specifications of the knot should be consistent with the length of 2, the diameter of mm
850~~500
greater than 500~1500bzxz.net
III. Technical requirements
Direct customer heat
3. The size of the needle velvet knot should comply with Article 2. 4. The chemical composition of the warp wire should comply with the length of 3. W matrix TO.%
11.5~2,00 1~0.1
Excess length
Impurities not included
1,,0,+Al0
Implemented in January 1981
0,01 1 +,01
3年第2页
$31587-—80
5. Slightly missing wires should have color on the surface, and no obvious oxidation should be observed. 6. Wires with a diameter less than 500 mm are not allowed to break when bent at an angle greater than 90°. Wires with a diameter greater than 500 mm are not allowed to break when bent at an angle greater than 90° when heated to 700°. IV. Acceptance rules
7. Special wires should be subject to technical inspection by the manufacturer. Products should meet the requirements of this standard. The user shall accept the products according to this standard within one month from the date of delivery. If the products do not meet the requirements, they shall be deemed unqualified by the manufacturer.
2. Each batch of tungsten tracer wires submitted for acceptance must be inspected according to the provisions of Articles 3, 5 and 6, and the chemical content shall be inspected according to Article 4. From each batch of materials submitted for acceptance, one sample (or ring material 1) shall be randomly selected for analysis. If it fails, double sampling shall be carried out for analysis. If it still fails, the whole batch shall be deemed unqualified. Test method
9 The test diameter is one thousandth of the first level, and the test quantity is not 100%. 10.1: The chemical analysis method of the wire shall be SJ/7325-72 and SJ1501-80 (electrical analysis method of the wire, the new method of compound chemical analysis and special analysis of the wire). 11. According to Article 6, the wire head of each wire shall be bent 90 degrees continuously at 10 places. If there is a break in the middle, the wire shall be bent again at about 10 places. If there are three consecutive breaks in the middle, it is not qualified. VI. Marking, packaging, transportation and storage
12. The length is less than or equal to 350m The wire with a diameter greater than 350 mm should be placed on a dry bakelite tray or a metal pad and wrapped with paper, then washed and packed in a cardboard box or plastic box. The wire with a diameter greater than 350 mm should be packed with medical paper when necessary. The packed wire should be placed in a box padded with paper. The box should have relevant certification marks in accordance with the provisions of G 191-3 Packaging and Storage Marking.
1. Each coil of wire should be attached with a label and a quality certificate card, indicating:
(1) The name and trademark of the manufacturer, || tt||【2）Production name and identification number,
(3)Specification, wholesale, net price,
(4)Standard number,
(5)Non-production month
SJ1587—80
(6)Qualified stamp of the technical inspection department,
14.Tungsten wire should be placed in a dry room without alkaline gas, total #
15.Transportation:Use general transportation tools, but strictly prevent harmful gases such as alkaline and snow from damaging SJ1587—80
( 6) Technical inspection department qualified stamp,
14, the tungsten wire should be placed in a dry room without alkaline gas, a total of #
15. Transportation: use general transportation tools, but should be strictly prevented from being damaged by harmful gases such as alkaline and snow SJ1587-80
(6) Technical inspection department qualified stamp,
14, the tungsten wire should be placed in a dry room without alkaline gas, a total of #
15. Transportation: use general transportation tools, but should be strictly prevented from being damaged by harmful gases such as alkaline and snow
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