GB/T 34891-2017 Translated English of Chinese Standard. (GBT 34891-2017, GB/T34891-2017, GBT34891-2017): Rolling Bearings - Parts Made from High-carbon Chromium Bearing Steels - Specifications for Heat TreatmentThis Standard specifies the technical requirements and test methods for annealing, quenching and tempering of G8Cr15, GCr15, GCr15SiMn, GCr15SiMo, GCr18Mo steel rolling bearing rings and rolling elements (hereinafter referred to as bearing parts) in accordance with GB/T 18254. This Standard is applicable to the heat treatment quality inspection of the above-mentioned steel bearing parts process and finished parts, and also to the heat treatment quality inspection of other high-carbon chromium steel bearing parts. For bearing parts with special requirements, perform according to the specifications of corresponding product drawings. |
Contents
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Appendix A Informative Effective wall thickness of the ferrule and effective | 16 |
References | 31 |
Common terms and phrases
anti-rust liquid astigmatism bainite ball crushing load ball nominal diameter Cold pickling cracks crushing load test crushing load value diagram see Figure Diameter series Distribution ratio effective diameter effective wall thickness ferrule after quenching GCr15SiMo GCr18Mo hardness correction value hardness difference hardness test hardness tester heat treatment High-temperature tempering temperature hot pickling hydrochloric acid inner ring JB/T Level 1 Level level diagram magnification martensite quenching mass fraction microstructure nitric acid nominal inner diameter nominal outer diameter Phosphoric acid provisions of GB/T quenching and tempering recommendedWidthretentionvalue requirements of bearing Residual austenite content retention of bearing ring after quenching Rolling bearings rolling elements Rolling surface hardness second level diagram Shandong shown in Table sodium carbonate specified in Table spheroidizing annealing Steel ball crushing Steel ball nominal steel grades structure surface hardness correction Table F.1 Technical requirements tempering in millimeters Tempering stability tested according third level diagram Trisodium phosphate Zhejiang