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GB/T 39430-2020: (Technical requirements for high reliability gear blanks)
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 39430-2020 | English | 319 |
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(Technical requirements for high reliability gear blanks)
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GB/T 39430-2020
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Basic data | Standard ID | GB/T 39430-2020 (GB/T39430-2020) | | Description (Translated English) | (Technical requirements for high reliability gear blanks) | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | J17 | | Word Count Estimation | 17,185 | | Date of Issue | 2020-11-19 | | Date of Implementation | 2021-06-01 | | Regulation (derived from) | National Standard Announcement No. 26 of 2020 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 39430-2020: (Technical requirements for high reliability gear blanks)---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.
(Technical requirements for high reliability gear blanks)
ICS 21.200
J17
National Standards of People's Republic of China
Technical requirements for high reliability gear blanks
2020-11-19 released
2021-06-01 implementation
State Administration for Market Regulation
Issued by the National Standardization Management Committee
Table of contents
Foreword Ⅰ
1 Scope 1
2 Normative references 1
3 Blank classification 1
3.1 Classification by part working conditions 1
3.2 Classification by material characteristics 1
3.3 Classification by application area 2
4 Technical requirements 2
4.1 Raw materials 2
4.2 Chemical composition 2
4.3 Forging 3
4.4 Delivery status 4
4.5 Mechanical properties 4
4.6 Macrostructure 5
4.7 Fracture 8
4.8 Macrostructure 8
4.9 Hardenability 8
4.10 Ultrasonic flaw detection 10
4.11 Shape and size 10
4.12 Appearance 10
4.13 Mark 10
4.14 Other 11
5 Production process control and product inspection 11
5.1 Process control 11
5.2 Quality consistency requirements 11
5.3 Inspection method 13
Reference 14
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard was proposed and managed by the National Gear Standardization Technical Committee (SAC/TC52).
Drafting organizations of this standard. Zhengzhou Machinery Research Institute Co., Ltd., Guizhou Anda Aviation Forging Co., Ltd., Shaoguan China Machinery Heavy Industry Co., Ltd.
Co., Ltd., Beijing Institute of Mechanical and Electrical Technology Co., Ltd., Zhengzhou Jiangyu Machinery Co., Ltd., China Aviation Development Zhongchuan Machinery Co., Ltd., Zhengzhou Zhongji
Rail Transit Equipment Technology Co., Ltd., Jiangsu Zhonggong High-end Equipment Research Institute Co., Ltd., Zhengzhou High-end Equipment and Information Industry Technology Research Institute
Co., Ltd., Henan Jiyuan Iron and Steel (Group) Co., Ltd., CMC Intelligent Equipment Innovation Research Institute (Ningbo) Co., Ltd., Steel Research Institute of Technology
Technology Co., Ltd., Henan Special Steel Materials Research Institute Co., Ltd.
The main drafters of this standard. Wang Wei, Wang Zhigang, Lu Mingke, Li Haixia, Zhang Kun, Yang Yaping, Jin Hong, Chen Chao, Wang Yingying, Lu Jun, Li Huawen,
Wang Bin, Li Baokui, Wang Aixiang, Wang Changlu, Long Weimin, Zhang Yuanguo, Yang Chun, Cao Liguo, Zhao Jiadong, Zhang Qinglang, Lu Jinsheng, Fu Xuechuan, Wang Wei,
Lu Penghao, Guan Hongjie, Fan Ruili, Bai Ruijuan, Chen Zuxiang, An Ruowei, Liu Baixuan, Liu Jiacheng.
Technical requirements for high reliability gear blanks
1 Scope
This standard specifies the classification of high-reliability gear blanks, chemical composition ratio, technical requirements for smelting and forging, and process control and inspection.
Inspection specifications.
This standard applies to aerospace, rail transit, marine equipment, wind power, nuclear power, metallurgy, petrochemical, mining, industrial robots and other important transmission
For the rolling or forging blanks of gears in the dynamic field, the outer diameter of the blanks is generally not more than 1200mm, and the mass of a single piece is not more than 3t. Others have high reliability
Gear blanks with sexual requirements can also be used as a reference.
This standard is not recommended for use in general industry, medical, automotive and other fields.
2 Normative references
The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this article
Pieces. For undated references, the latest version (including all amendments) applies to this document.
GB/T 222 Allowable deviation of chemical composition of finished steel
GB/T 223 (all parts) Steel and alloy chemical analysis methods
GB/T 225 Steel Hardenability Test Method for End Quenching (Jominy Test)
GB/T 226 Steel Macrostructure and Defect Inspection Method
GB/T 228.1 Tensile Test of Metallic Materials Part 1.Room Temperature Test Method
GB/T 229 Charpy pendulum impact test method for metallic materials
GB/T 231.1 Brinell Hardness Test of Metallic Materials Part 1.Test Method
GB/T 1814 Steel Fracture Inspection Method
GB/T 1979 Structural steel macrostructure defect rating chart
GB/T 3480.5 Calculation of load-bearing capacity of spur gears and helical gears-Part 5.Strength and quality of materials
GB/T 4162 Ultrasonic testing method for forged and rolled steel bars
GB/T 6394 Method for determination of average grain size of metals
GB/T 10561 Standard Determination of Non-metallic Inclusions in Steel Grading Chart Microscopic Inspection Method
GB/T 12363 Functional classification of forgings
JB/T 5000.15 General Technical Requirements for Heavy Machinery Part 15.Nondestructive Testing of Steel Forgings
3 Blank classification
3.1 Classification by part working conditions
3.1.1 According to the different working conditions and importance of the parts, they are divided into two categories. According to the provisions of GB/T 12363, they are represented by I and II.
Importance is higher than Class II.
3.1.2 The category of gear blanks should be marked in the order drawings or related technical documents. If not specified, it will default to category II.
3.2 Classification by material characteristics
3.2.1 According to the material's contact fatigue limit σHlim and bending fatigue limit σFlim, it is divided into two levels. According to the provisions of GB/T 3480.5
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