GB/T 4186-2002 Molybdenum-tungsten alloy rod

This standard specifies the requirements, test methods, inspection rules, packaging, marking, transportation and storage of molybdenum-tungsten alloy rods. This standard is applicable to molybdenum-tungsten alloy rods used for manufacturing parts and lead wires in electron tubes and electric light sources. GB/T 4186-2002 Molybdenum-tungsten alloy rods GB/T4186-2002 standard download decompression password: www.bzxz.net

1CS77.080
National Standard of the People's Republic of China
GB/T4186—2002
Molybdenum-tungsten alloy rods
Molybdenurn-lungslen alloy rods2002 - 07 - 18 Issued by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China on December 1, 2002. CB14186-2502 was implemented on December 1, 2002. Compared with GB/T4186-1984, this standard has been revised as follows: According to GB/T 4186-1984, the following contents have been added: 1. According to GB/T 4186-1984, the following contents have been added: 2. The following contents have been added: 3. The following contents have been added: 4. The following contents have been added: 5. The following contents have been added: 6. The following contents have been added: 7. The following contents have been added: 8. The following contents have been added: 9. The following contents have been added: 10. The following contents have been added: 11. The following contents have been added: 12. The following contents have been added: 13. The following contents have been added: 14. The following contents have been added: 15. The following contents have been added: 16. The following contents have been added: 17. The following contents have been added: 18. The following contents have been added: 19. The following contents have been added: 19. The following contents have been added: 19. The stipulations on the length of alloy rods have been changed. The ten standards are replaced by the standard of the People's Republic of China and the Ministry of Information Industry. The six standards are promoted by the Electronic Standards Research Institute of the Ministry of Information Industry and the National Standardization Research Institute of the Ministry of Information Industry. The drafting units are: Hongbo Industrial Co., Ltd. of the Ministry of Industry and Information Technology, the Electronic Standardization Research Institute of the Ministry of Industry and Information Technology, and the non-ferrous metals. The drafters of this standard are: Hou Xingman, Ji Xiaoying, and the scope of materials. National Standard of the People's Republic of China. Silver-tungsten alloy rods. Molybdeum-tungsten alloy rods CB/T 4185—2002
Chemical*61/4180984
This standard specifies the requirements, test methods, inspection rules, packaging, labeling, transportation and storage of temporary alloy rods (hereinafter referred to as alloy rods). This standard applies to the alloy rods used as parts of electric light sources and lead-out carriers. 2 Referenced standards
The texts included in the following standards become the provisions of the standards through reference in this standard: At the time of publication of this standard, the versions shown are the most effective: All standards will be accepted and the parties using the standards should explore the possibility of developing new versions of the following standards: /?191-2000 Packaging, storage and transportation diagrams
EDTA volumetric method for determination of the amount of needle
GB/-325-1983 Chemical analysis film for pin alloys 3.1 Chemical composition The chemical composition of the alloy shall be as specified in Table 1. 32. Specifications 3.2.1 Minimum diameter and maximum diameter of alloy rod shall be as specified in Table 2. Alloy rod products Alloy rod products Water-penetrating metal ...
.02182.5
3.3 Surface quality
The surface quality of the alloy steel shall comply with the requirements of Table 1. General alloy rod
Straightening point alloy rod
Smooth alloy rod
3.4 ​​Straightness tolerance
GB/T4186
Clean, straightened alloy rod
Straight, cracked, burred, slightly vibration marks are allowed, no double seams, burrs and obvious requirements are allowed
No imitation, longitudinal effect and material fineness marks are allowed. The point and line flow tolerance of the alloy steel rod shall not be greater than 1:3.5 National tolerance| |tt||The tolerance of the light-sensitive alloy rod shall not be greater than 1/2 of the straightness tolerance. 4 Test method
4.1 The chemical composition of the alloy rod shall be analyzed according to the provisions of 63/T3835. Oxidation degree is allowed.
Shi Guang Tai Jin Bank
Black or visual color, slight oxidation will occur around the luster, and chemical treatment is not allowed. 4.2 The diameter, straightness deviation and length deviation of the alloy rod shall be measured with T-level micrometer and ruler. 4.3 The surface quality of the alloy rod shall be inspected and tested with a 1x magnifying glass when necessary. 4. The white line of the alloy rod shall be inspected by the net string method. Place the inspected alloy rod on a smooth plane, measure its aligned length and peak height, and calculate its straightness tolerance as follows: ×10C
Where: L
·Straight line tolerance of alloy rod, %
Maximum peak height of alloy rod (and shape height) I;
Corresponding chord length of alloy rod, mm
4.5 The tolerance length of the polished alloy rod is measured with a 1 meter ruler from one point to two points on the vertical axis, and the difference is 5. Inspection rules
5.1 Inspection department:
Products are inspected by the supplier's quality inspection department to ensure genuine products. The product complies with this standard and has a quality certificate. 5.2 Inspection classification
Product inspection only conducts quality consistency inspection. 5.3 Validity period
5.3.1 Inspection item date
Quality consistency inspection item date is selected according to the inspection and test item month www.bzxz.net
Linear tolerance
National standard
Chemical analysis
5.3.2 Inspection batch
GB/T4786-2002
The products of the same brand and specification in the total production batch are one inspection batch. 5.3.3 Shaft samples and qualified state determination
5.3.3.1 A correction inspection is! w Inspection and adjustment: After inspection, the number of samples that are not qualified and tested shall be determined
5.3.3.2 The group inspection shall be carried out by randomly selecting a sample from each inspection batch or each product. If it does not meet the requirements, another sample from the batch shall be inspected. If it still does not meet the requirements, the batch shall be deemed as unqualified. 5.4 The inspector shall conduct inspections according to this standard within three months from the receipt of the product. If the inspection results do not meet the requirements of the brand type shown on the product certificate, the product is still unqualified after inspection and measurement. 6 Packaging, marking, transportation and storage
6.1 Bundle the products with the specified size and specifications into a bundle and pack them into a wooden box with paper. The box shall be marked with the "standard mark" of B/T151.
6-2 Each bundle shall be accompanied by a certificate, on which shall be marked: a) Name and brand of material:
b) Production name:
) Specifications:
e) Production date:
! Stamp of the inspection department;
) Name of the manufacturer who compiled this standard
6-3 The packaged products shall be dried in a room with a flash point of no more than 5 and no acid or alkaline gas: 6.4 They may be transported by any means and shall not be damaged by severe acid or alkaline gas or before transportation.
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