Search result: GB/T 17879-2023 (GB/T 17879-1999 Older version)
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Gear - Surface temper etch inspection after grinding, chemical method
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GB/T 17879-2023
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| GB/T 17879-1999 | English | 399 |
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Gears. Surface temper etch inspection after grinding
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GB/T 17879-1999
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| Standard ID | GB/T 17879-2023 (GB/T17879-2023) | | Description (Translated English) | Gear - Surface temper etch inspection after grinding, chemical method | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | J17 | | Classification of International Standard | 21.200 | | Word Count Estimation | 18,184 | | Date of Issue | 2023-08-06 | | Date of Implementation | 2023-08-06 | | Older Standard (superseded by this standard) | GB/T 17879-1999 | | Issuing agency(ies) | State Administration for Market Regulation, National Standardization Administration |
GB/T 17879-2023. Chemical etching test for surface tempering of gears after grinding
ICS 21.200
CCSJ17
National Standards of People's Republic of China
Replace GB/T 17879-1999
Chemical etching inspection of surface temper after gear grinding
(ISO 14104.2017,IDT)
Published on 2023-08-06
2023-08-06 Implementation
State Administration for Market Regulation
Released by the National Standardization Administration Committee
Table of contents
PrefaceⅠ
1 range 1
2 Normative reference documents 1
3 Terms and Definitions 1
4 Equipment and requirements 1
4.1 Container materials1
4.2 Inspection area 1
4.3 Cleaning device 1
4.4 Timing device 1
4.5 Grayscale comparison card 1
5 reagent 2
5.1 Cleaning materials 2
5.2 Nitric acid 2
5.3 Hydrochloric acid 2
5.4 Alcohol 2
5.5 Water 2
5.6 Alkaline solution 2
5.7 Anti-rust oil 2
6 Inspection Procedure 2
6.1 General 2
6.2 Cleaning 5
6.3 Erosion 5
7 Inspection standards 7
7.1 Visual imaging and grading7
7.2 Effect of surface hardness7
8 Removal of tempering etching discoloration 7
9 Rework of surface tempered parts 7
10 Operator qualifications 8
11 Maintenance and Management 8
12 Safety and environmental protection 13
13 Specifications and Documents 14
13.1 Specification 14
13.2 Document 14
Reference 15
Preface
This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1.Structure and Drafting Rules of Standardization Documents"
Drafting.
This document replaces GB/T 17879-1999 "Etching test for surface tempering of gears after grinding" and is consistent with GB/T 17879-1999.
In addition to structural adjustments and editorial changes, the main technical changes are as follows.
a) Added "Grayscale comparison card" (see 4.5);
b) Changed the requirements for reagents nitric acid and hydrochloric acid (see 5.2 and 5.3, 3.2 and 3.3 of the.1999 edition);
c) Added requirements for the reagent "anti-rust oil" (see 5.7);
d) Added "General Principles" for inspection procedures (see 6.1);
e) Changed the concentration of pickling and etching solutions (see Table 2 and Table 3);
f) Changed "Removal of tempering etching discoloration" (see Chapter 8, Chapter 7 of the.1999 edition);
g) Changed "Rework of surface tempered parts" (see Chapter 9, Chapter 6 of the.1999 edition);
h) Added "operator qualifications" (see Chapter 10);
i) Added "Specifications and Documentation" (see Chapter 13).
This document is equivalent to ISO 14104.2017 "Chemical etching test for surface tempering after gear grinding".
The following editorial changes have been made to this document.
---Deleted the information related to product names in 4.5, Figure 1 and Figure 3.
Please note that some content in this document may be subject to patents. The publisher of this document assumes no responsibility for identifying patents.
This document is proposed and coordinated by the National Gear Standardization Technical Committee (SAC/TC52).
This document was drafted by. Zhengji Institute (Zhengzhou) Transmission Technology Co., Ltd., Nanjing High Precision Gear Group Co., Ltd., Jinhua Xintian Gear Co., Ltd.
Co., Ltd., Inner Mongolia First Machinery Group Co., Ltd., Zhejiang Taijiu Precision Machinery Co., Ltd., Zhengzhou Machinery Research Institute Co., Ltd., Henan Ke
National University of Science and Technology, Zhejiang Shuanghuan Transmission Machinery Co., Ltd., Xi'an Fast Automobile Transmission Co., Ltd., Northwestern Polytechnical University, Chongqing Gearbox Co., Ltd.
Limited liability company, Zhejiang Zhongchai Machinery Co., Ltd., Huigong (Hebei) Machinery Group Co., Ltd., Shandong Yukos Petroleum Equipment Co., Ltd., Luo
Yangke Dagel Transmission Research Institute Co., Ltd.
The main drafters of this document. Wang Zhigang, Wang Zhengbing, Wang Wei, Lu Chuangui, Guan Hongjie, Yao Changfeng, Wang Xiaohai, Chen Jinshan, Gu Ruijie,
Fan Ruili, You Guangfu, Yu Gongyan, Chen Yongxiang, Ding Yinghui, Chen Chao, Luo Jianqin, Liu Guoqiang, Su Jianxin, Li Haixia, Huang Zongjun, Yan Penghui,
Li Haocheng, Tan Liang, Guo Qingqing, Wang Dongfei, He Mengxing, Qin Gang, Jiang Zengguang, Chen Jinkou, Wei Bingyang, Deng Xiaozhong, Zhang Peng, Wang Huijun.
This document was first published in.1999 and this is the first revision.
Chemical etching inspection of surface temper after gear grinding
1 Scope
This document specifies the operations and requirements for detecting and classifying localized overheating of grinding surfaces using chemical etching methods.
The detection method described in this document is mainly used for gear grinding surfaces. It can also be used for machining after heat treatment (such as hard turning, milling, deburring).
Abnormal surfaces formed by thorns, chamfers, etc.). The detection of surface metallographic changes caused by carburization and decarburization can be used as a reference.
The method described in this document is more sensitive to hardness changes than most surface hardness testing methods. Some previous testing methods
This document is no longer recommended.
This document applies to quenched steel parts such as gears, shafts, splines and bearings. It does not apply to nitrided parts and stainless steel parts.
Note. This method is sometimes called "nitric acid corrosion", but it should not be confused with "nitric acid corrosion" in other methods.
The surface tempering etching process is used after surface grinding and before final finishing (such as super finishing, shot peening and honing).
2 Normative reference documents
This document has no normative references.
3 Terms and definitions
There are no terms or definitions to be defined in this document.
4 Equipment and requirements
4.1 Container materials
It should not react with the solution contained and will not damage the parts being tested. All containers should be labeled with the contents of the solution and should be covered when not in use.
good. Container markings should comply with relevant regulations.
4.2 Inspection area
There should be adequate lighting without shadows and reflections. The light intensity should not be less than 2200lx (≈200 foot candles).
4.3 Cleaning device
Cleaning methods should use alkali cleaning, steam degreasing, etc., or corresponding processes.
4.4 Timing device
Appropriate timing methods should be used to ensure consistent processing of all parts in the same group.
4.5 Grayscale comparison card
It is advisable to choose a suitable grayscale contrast card.
The grayscale card shown in Figure 1 can be used, or a sample of a known surface tempered image can be used for comparison.
Figure 1 is an example of a commercial grayscale card. Due to differences in copied image quality, the gray scale displayed in this image is not necessarily accurate and is for
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