Academic Journal
Gradient Microstructure in a Gear Steel Produced by Pressurized Gas Nitriding
| العنوان: | Gradient Microstructure in a Gear Steel Produced by Pressurized Gas Nitriding |
|---|---|
| المؤلفون: | Ran Yang, Guilin Wu, Xiaodan Zhang, Wantang Fu, Niels Hansen, Xiaoxu Huang |
| المصدر: | Materials; Volume 12; Issue 22; Pages: 3797 |
| بيانات النشر: | Multidisciplinary Digital Publishing Institute |
| سنة النشر: | 2019 |
| المجموعة: | MDPI Open Access Publishing |
| مصطلحات موضوعية: | gear steel, pressurized gas nitriding, microhardness, gradient microstructure |
| الوصف: | A tempered martensitic gear steel (18CrNiMo7-6) sample was nitrided on two sides using a 5 atm pressurized gas at 530 °C for five hours. The nitrided sample was characterized by means of microhardness, X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. A microhardness gradient was identified over a distance of 1000 µm with hardness values from 900 HV0.1 at the surface to 300 HV0.1 in the center matrix. The gradient microstructure was mainly divided into three zones: (i) a nitride compound layer at the top surface (~20 µm thick), (ii) a diffusion zone with containing precipitates (~350 µm thick), and (iii) the center matrix of the tempered martensite. Compared with carburized sample, the harder surface of the nitrided one ensures a better performance of the present pressured gas nitrided gears. |
| نوع الوثيقة: | text |
| وصف الملف: | application/pdf |
| اللغة: | English |
| Relation: | https://dx.doi.org/10.3390/ma12223797 |
| DOI: | 10.3390/ma12223797 |
| الاتاحة: | https://doi.org/10.3390/ma12223797 |
| Rights: | https://creativecommons.org/licenses/by/4.0/ |
| رقم الانضمام: | edsbas.509DD4DD |
| قاعدة البيانات: | BASE |
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