GB/T 11354-2005 Translated English of Chinese Standard. (GBT 11354-2005, GB/T11354-2005, GBT11354-2005): Determination of nitrided case depth and metallographic microstructure examination for steel and iron partshttps://www.chinesestandard.net, 7 déc. 2016 - 24 pages This Standard specifies determination method of nitrided case depth, examination method and technical requirements for metallographic microstructure before and after nitriding. |
Table des matières
Foreword | 5 |
Examination of prior metallographic structure | 6 |
Specimen conditions | 8 |
Determination method for nitrided case depth | 9 |
Examination of brittleness of nitrided case | 12 |
Examination of porosity of nitrided case | 14 |
Examination of nitrides in nitrided case | 16 |
Examination report | 18 |
Annex A Informative Recommended etchant | 19 |
Annex B Informative Partial test data | 20 |
Expressions et termes fréquents
100 Nitrided 20 min oil acid ethanol solution amount of free brittleness level brittleness of nitrided Carbon steel compound layer Copper chloride Copper sulfate corners are crack decomposition of ammonia Denitrification depth Figure Description of brittleness diffusion layer diffusion layer 9a erosion or scratching ethanol solution corrosion ethanol solution erosion Examination method examination of brittleness FeCl3 Ferrite content free ferrite g HCl GB/T h nitriding hardness method hydrochloric acid Latin alphabet layer is dense Level 5 Figure level of nitrided levels for important magnesium chloride magnification of 500 micropores mL C2H5OH mL H2O mL Room temperature needle-like sorbite nervation and wave nitric acid ethanol nitrided case depth nitrided case Level nitrides in nitrided nitriding surface Nitriding thermal decomposition nitriding treatment nitrocarburizing original structure prior porosity of nitrided prior to nitriding Qualification assessment Recommended etchant Room temperature erosion selenic acid Standard test force vertical direction Vickers hardness indentation wave like nitrides