This standard specifies the basic properties of copper-bismuth-cerium contact materials (excluding electrical application properties). This standard applies to copper-bismuth-cerium alloy ingots manufactured by vacuum smelting methods. This product is mainly used in vacuum circuit breakers of 10kV and below. JB/T 7096-1993 Technical conditions for copper-bismuth-cerium contact materials JB/T7096-1993 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/T 7096-1993
Technical Conditions for Copper-Cerium Contact Materials
Published on October 8, 1993
Ministry of Machinery Industry of the People's Republic of China
Implemented on January 1, 1994
Mechanical Industry Standard of the People's Republic of China
Technical Conditions for Copper-Bismuth Contact Materials
Subject Content and Scope of Application
This standard specifies the basic properties of copper-bismuth contact materials (excluding electrical application properties). JB/T7096-1993
This standard applies to copper-bismuth alloy ingot products manufactured by vacuum smelting method (hereinafter referred to as copper-bismuth alloy), which are mainly used in vacuum circuit breakers of 10kV and below.
Reference standards
GB2828
GB5121
JB5351Www.bzxZ.net
Batch inspection counting sampling procedures and sampling tables Copper chemical analysis methods
Basic performance test methods for vacuum switch contact materials 3.1 The model of copper-bismuth contact material is: CTBS
3.2 The meaning of each symbol in the model:
4 Technical requirements||tt| |Blunt (Pinyin Prefix)
(Pinyin Prefix)
Copper (Pinyin Prefix)
Contact (Pinyin Prefix)
The chemical composition and physical mechanical properties of copper-bismuth alloy shall meet the requirements of Table 1; Table 1
Copper wheel blunt alloy
CuBiCe
Chemical composition (heavy
Total amount of impurities <0.05
0.4~0.80.10~ 0.15
Gas content
Oxygen content
The macroscopic structure of copper-bismuth alloy should be free of inclusions, pores, looseness and cracks. 4.2
The bismuth in the microstructure of copper-bismuth alloy should be evenly distributed, see the photo. Approved by the Ministry of Machinery Industry on October 8, 1993
Nitrogen content
Physical and mechanical properties
Hardness HB
Conductivity
199 4-01-01 Implementation
JB/T70961993
CuBiCe Metallographic Structure (100×)
4.4 The basic shape of copper chain alloy is round chain ingot. The surface is removed by machine and the casting shrinkage cavity is cut off. The specific size and appearance requirements are determined by negotiation between the supply and demand parties.
5 Test method
5.1 The chemical composition analysis of copper bismuth alloy is carried out on the upper and lower two ingots. Sampling of parts shall be carried out in accordance with the "Chemical Analysis Method of Copper-Bismuth Casting Alloy", and the impurity content (except gas content) shall be carried out in accordance with the requirements of GB5121. 5.2 The gas content, density, hardness and conductivity of copper-bismuth alloy shall be determined in accordance with JB5351. 5.3 The macroscopic structure and appearance of copper alloy shall be inspected with an inner eye or a magnifying glass (≤10 times). 5.4 The microscopic structure of copper-bismuth alloy shall be inspected with a metallographic microscope at 100 times. Inspection rules
The quality inspection of copper-bismuth alloy shall be carried out in batches by the quality inspection department of the production unit. Products manufactured continuously with the same batch of raw materials and the same process are considered as a batch (when the number of products in the same batch is greater than 100 ingots, every 100 ingots shall be regarded as a batch). 6.2 Chemical composition (Bi, Ce content) inspection is 100% for each batch. Macroscopic structure, appearance quality and size inspection are 100% for each batch. 6. 3
6.4 Gas content, density, hardness, conductivity and microstructure inspection According to the requirements of GB2828, the normal inspection secondary sampling plan and the special inspection level S-3 are used for sampling, and the qualified quality level is 10. See Table 2. Table 2
Special inspection level S-3
91~150
Note: ★
Sample size
Small code
Sample size
Cumulative sample
Book size
Qualified quality level (AQL)
Use the first axis sample plan below. If the rack sample size is greater than or equal to the batch, the whole batch is inspected 100%, and the qualified judgment number;
Re---unqualified judgment number,
JB/T7096-1993
The quality of copper chain alloy shall meet the requirements of the fourth rate of this standard. If the products do not meet the requirements of Article 4.1 and Article 4.3 of this standard, they shall be scrapped according to the batch; however, the manufacturer is allowed to inspect them one by one and deliver the qualified ones. 6.6 When the raw materials, processes and equipment are changed, all basic properties shall be inspected and the purchaser shall be informed. 6.7 The user shall inspect the quality of the products received. If the inspection results do not meet the requirements of this standard, the user may submit a request to the manufacturer within two months from the date of receipt of the products, and the two parties shall negotiate to resolve the issue.
Marking, packaging, transportation and storage
Each steel-bismuth alloy ingot shall be marked with the factory number. Each batch of products shall be accompanied by a product certificate and a chemical composition analysis report. The product certificate shall indicate:
Manufacturer name;
Product name, factory number, specifications, quantity, this standard number; factory date,
Inspector seal and inspection department seal.
Products shall be transported in wooden boxes.
The outside of the packaging box should be marked with:
Manufacturer name:
Product name;
Gross weight and net weight:
Moisture-proof, handle with care, shock-proof mark.
The product should be transported and stored in dry, non-corrosive nitrogen. Additional notes:
This standard was proposed and managed by the Guilin Electric Science Research Institute of the Ministry of Machinery Industry, and was drafted by the Guilin Electric Science Research Institute of the Ministry of Machinery Industry. The main drafters of this standard are Chen Xiangmin, Liang Yonghe, and Chen Miaonong. People's Republic of China
Mechanical Industry Standard
Technical Conditions for Copper Contact Materials
JB/T 70961993
Published by the China Academy of Mechanical Science
Printed by the China Academy of Mechanical Science
(No. 2 Shouti South Road, Beijing
Postal Code 100044)
Number of Words XXX,XXX
Format 880×1230
Sheet X/X
Edition X, XX, 19XX
Printing X, XX, 19XX
Number of Prints 1-XXX
Price XXX.XX Yuan
XX-XXX
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