GB/T 26872-2011 English PDF

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 26872-2011	RFQ	ASK	3 days	Metallographic atlas of electrical contact materials	Valid

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GB/T 38090   GB/T 29628   GB/T 3217   GB/T 26871   GB/T 26871   GB/T 26867   

Basic data

Standard ID: GB/T 26872-2011 (GB/T26872-2011)
Description (Translated English): Metallographic atlas of electrical contact materials
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: K14
Classification of International Standard: 29.120.99
Word Count Estimation: 131,183
Date of Issue: 2011-07-29
Date of Implementation: 2011-12-01
Quoted Standard: GB/T 2900.4-2008; GB/T 26871-2011
Regulation (derived from): Announcement of Newly Approved National Standards No. 12 of 2011
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
Summary: This standard specifies the main electrical contact materials, normal tissue, typical defects and common raw material powder particle morphology metallographic picture. This standard applies to electrical contact material metallographic examination cross-reference.

GB/T 26872-2011: Metallographic atlas of electrical contact materials

---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.
Metallographic atlas of electrical contact materials ICS 29.120.99 K14 National Standards of People's Republic of China Electrical contact material microstructure map Issued on. 2011-07-29 2011-12-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This standard was drafted in accordance with GB/T 1.1-2009 given rules. The standard proposed by China Electrical Equipment Industrial Association. This standard by the National Standardization Technical Committee for Electrotechnical alloy (SAC/TC228) centralized. This standard was drafted. Wenzhou Hongfeng Electrical Alloy Co., Ltd., Zhejiang Metallurgical Research Institute Co., Ltd., Foshan Tongbao Precision Alloy shares Parts Co., Guilin Electric Apparatus Research Institute, Fuda Alloy Materials Co., Ltd. Wenzhou pagoda silver contacts, Shaanxi Surrey workers Industry Co., Ltd., Tianshui West, the Great Wall Alloy Co., Ltd., Guilin Ginger Electrical and Electronic Materials Technology Co., ADT (days Tianjin) electrical contact Manufacturing Co., Ltd. Zhejiang Le silver alloy, and Greece Alloy Co., Ltd., Shaoxing County Hongfeng Chemical metallwarenfabrik. The main drafters of this standard. Hu Yuelin, Chen Ding pivot Hua Huo Zhiwen, Zhang Hongjun, Liu Qiang, Ma L, Bai Xiaoping, Chen Qiang, Xie Yongzhong, Tian Jun flowers, Wang Xiaojun, Chen Jing, Yan Xiaofang, Sectors that Undermine Gao Jing, Chen Jingsheng, Chen Jianxin, Zheng Yuanlong, Chen Dafeng.

Introduction

Responsible for electrical contact materials in electrical switches in the connected, breaking, carrying and isolated current task is to switch appliances in key functional material Material, its quality directly affect the safety, reliability and operating life of electrical switches. Electrical contact material product quality available microstructure, Metallurgical defects, chemical composition and mechanical physical properties characterized. Microstructure is one of the most important performance electrical contact material, its performance directly Movies Electrical switch in response to electrical performance, reliability and longevity. Metallurgical testing and analysis is the development and production of electrical contact materials essential One of the important means. In order to improve the level of detection of metallurgical industry, electrical contacts, contact materials to ensure product quality, and collected a total of this standard is born Normal microstructure production and use of electrical contact materials, typical defects and common electrical contact material used in the production of raw materials powder particles Morphology total of more than 400 pictures, covering the production of various types of electrical contact materials, metallurgical testing is extremely important reference material. Electrical contact material microstructure map

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 electricalcontactrivet 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 holisticelectricalcontactrivet It made of the same material of the rivet-type contact. 3.3 Composite rivet-type contact compoundelectricalcontactrivet 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 ......

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