A Study on Formation and Growth Mechanism of Nitride Layers During Plasma Nitriding Process of Plastic Injection Mold Steel
| Autor: | Sh. Kheirandish, N. Nayebpashaee, Mansour Soltanieh |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
010302 applied physics
Glow discharge Materials science Scanning electron microscope Mechanical Engineering Metallurgy Energy-dispersive X-ray spectroscopy 02 engineering and technology Nitride 021001 nanoscience & nanotechnology 01 natural sciences Indentation hardness Industrial and Manufacturing Engineering Mechanics of Materials 0103 physical sciences General Materials Science Surface layer 0210 nano-technology Layer (electronics) Nitriding |
| Zdroj: | Materials and Manufacturing Processes. 31:1192-1200 |
| ISSN: | 1532-2475 1042-6914 |
| DOI: | 10.1080/10426914.2015.1019106 |
| Popis: | Ion nitriding modifies composition of surface layer in steel used in plastic mold application and this consequently improves their lifecycle. In this study, pulsed plasma nitriding technique was used to produce a protecting hard layer on AISI P20 steel at three process temperatures of 450°C, 500°C, and 550°C for durations of 2.5, 5, 7.5, and 10 h at a constant gas mixture of 75% N2–25% H2. Surface morphology was studied by optical and scanning electron microscope and the phases formed on the surface layer were determined by X-ray diffraction (XRD). Elemental depth profile was measured by techniques including energy dispersive spectroscopy, wavelength dispersive spectrometer, and glow discharge spectroscopy and for identifying hardness profile, microhardness variations from surface to core of samples were recorded. Results showed that, thickness of compound layer of plastic mold steel AISI P20 was negligible. Moreover in ion nitriding of AISI P20, nitride were formed and grown in some preferred directions ... |
| Databáze: | OpenAIRE |
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