ICS 21.200 CCS J17 Association Standard T/CSTM 00833 E—20 22 Specification of driving gear forging for rail transport 轨道交通用驱动齿轮锻件技术规范 (English Translation) Issued by Chinese Society for Testing & Materials ，ZhongguancunIssue d date:2023 -07-25 Implementation date ：2023 -10-25 CSTMhQÆSÑ^Ou( 全国团体标准信息平台 Contents 1 Scope ................................ ................................ ................ 4 2 Normative references ................................ ................................ ... 4 3 Terms and definitions ................................ ................................ ... 5 4 Classification ................................ ................................ .......... 8 5 Smelting ................................ ................................ ............. 8 Name and chemical composition ................................ ...................... 8 5.1 Technical requirements ................................ .............................. 9 5.2 6 Forging ................................ ................................ ............. 11 Forgings classification ................................ .............................. 11 6.1 Technological process ................................ .............................. 11 6.2 Process requirements ................................ ............................... 11 6.3 7 Forging products ................................ ................................ ...... 12 Delivery status ................................ ................................ .... 12 7.1 Mechanical properties and sampling ................................ ................... 12 7.2 Macrostructure ................................ ................................ ... 22 7.3 Microstructure ................................ ................................ .... 22 7.4 Hardenability ................................ ................................ ..... 23 7.5 Ultras onic flaw detection ................................ ........................... 27 7.6 Shape and dimensions ................................ .............................. 28 7.7 Appearance ................................ ................................ ...... 28 7.8 Marking ................................ ................................ ......... 28 7.9 Others ................................ ................................ ......... 29 7.10 8 Determination ................................ ................................ ........ 29 Retest ................................ ................................ ........... 29 8.1 Reheat treatment ................................ ................................ .. 29 8.2 Inspections rules ................................ ................................ .. 29 8.3 Annex A (Informative) Specimens for mechanical properties ................................ .... 31 Bibliography ................................ ................................ ........... 33 CSTMhQÆSÑ^Ou( 全国团体标准信息平台 T/CSTM 00833E —2022 II Foreword CSTM /FC 991 is in charge of this English translation. In case of any doubt about the contents of English translation, the Chinese original shall be considered authoritative. This document is drafted in accordance with the rules given in the GB/T 1.1 —2020 Directives f or standardization ―Part 1: Rules for the structure and drafting of standardizing documents and GB/T 20001.10— 2014 Rules for drafting standards ―Part 10: Product standards . Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. The issuing body of this document shall not be held responsible for identifying any or all such patent rights. This document was jointly proposed by CSTM/FC 99 , Integrated standardization, and SAC/TC 52 ( The National Technical Committee for Gear Standardization ). This document was prepared by