GB/T 26872-2011Metallographic atlas of electrical contact materials (English PDF)
电触头材料金相图谱
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
July 29, 2011
Implementation date
December 1, 2011
Scope
GB/T 26872-2011 is the English-translated version of 电触头材料金相图谱.
GB/T 26872-2011 is the Chinese standard "Metallographic atlas of electrical contact materials". Its scope clause reads: This standard gives the principal normal tissue electrical contact materials, common typical defects and raw material powder particle morphology Metallography.
Cross Reference This standard applies to electrical contact materials metallographic examination time. Its clauses include terms and definitions.
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Document preview — GB/T 26872-2011
National Standard of the People's Republic of China
- ICS
- 29.120.99
- Classification
- K 14
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- 1 Scope
- 2 Normative references
- 3 Terms and Definitions
- 3.1 Rivet Contact
- 3.2 Overall Rivet Contact
- 3.3 Composite rivet-type contact
- 3.4 Organization uneven distribution nonuniformmetalographicstructure
- 3.5 Porosity, pore hole; airhole
- 3.6 Bubbling blister
- 3.7 Alloy sandwich interlayeraloy
1 Scope
This standard gives the principal normal tissue electrical contact materials, common typical defects and raw material powder particle morphology Metallography.
Cross Reference This standard applies to electrical contact materials metallographic examination time.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein
Member. For undated references, the latest edition (including any amendments) applies to this document.
GB/T 2900.4-2008 Electrotechnical terminology Electrical Alloy
GB/T 26871-2011 Test method for electrical contact materials microstructure
3 Terms and Definitions
GB/T 2900.4-2008 defined and the following terms and definitions apply to this document.
3.1 Rivet Contact
The shape of the contact rivet shape, when using riveted on the touch-bridge or conductive sheet electrical contacts. It is divided into integral and complex Rivet Contact
Rivet contacts.
3.2 Overall Rivet Contact
It made of the same material of the rivet-type contact.
3.3 Composite rivet-type contact
A composite of two or more materials from the rivet-type contact.
3.4 Organization uneven distribution nonuniformmetalographicstructure
Due to segregation resulting oxide aggregates (within the alloy oxidation), the original powder and coarse powder mixed uneven (powder metallurgy) oxide
It was along the grain boundary precipitation and other causes tissue.
3.5 Porosity, pore hole; airhole
Since the density of the material does not meet the relevant requirements or powder containing a large air voids formed.
3.6 Bubbling blister
Produce holes or internal oxidation of the alloy contact material with high temperature and solder bonding layer material is not strong and other reasons in the manufacturing process of the formation of
Empty.
3.7 Alloy sandwich interlayeraloy
Including oxidation process due to oxidation time, oxidation temperature and oxygen partial pressure conditions unfavorable, resulting in failure to oxidation middle of the presence of
GB/T 38090-2019 | GB/T 3217-2013 | GB/T 29628-2013 | GB/T 26871-2024 | GB/T 26871-2011 | GB/T 26867-2011 | […]
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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 83 pages — is available in the English PDF.
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