Abstract
A uniform nitride layer development at various features of extrusion dies is an important factor in the service life of dies. The present study is performed to investigate the influence of die profile corner angles and their orientation on the growth behaviour of nitride layer. Various corner features (including right-angled, acute-angled and obtuse-angled) are machined in AISI H13 steel plates using wire EDM in local die manufacturing plant using the usual die manufacturing process. Samples were then gas nitride under controlled nitriding potential. Uniformity and depth of nitride layers have been investigated in terms of compound layer and total nitride case depth for these three types of corner features using optical and scanning electron microscopes. Hardness across the nitride layer for each feature is measured and compared. The growth behaviour of nitride layer at each feature location is explained in terms of nitrogen concentration and shape of the corner. This study highlighted the need for some design modifications in the hot extrusion die cavities for improved service life.
Original language | English |
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Title of host publication | Proceedings - MONTREAL'2014 AES-ATEMA |
Subtitle of host publication | 17th AES-ATEMA International Conference on Advances and Trends in Engineering Materials and Their Applications, ATEMA MONTREAL 2014 |
Editors | Yehia M. Haddad |
Publisher | Advanced Engineering Solutions |
Pages | 77-85 |
Number of pages | 9 |
ISBN (Electronic) | 9781927838020 |
State | Published - 2014 |
Publication series
Name | AES-ATEMA International Conference Series - Advances and Trends in Engineering Materials and their Applications |
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Volume | 2014-January |
ISSN (Print) | 1924-3642 |
Bibliographical note
Publisher Copyright:© 2014, Advanced Engineering Solutions (AES.COM) Ottawa, Canada.
Keywords
- Extrusion die
- H13 steel
- Hardness
- Microstructure
- Nitriding
ASJC Scopus subject areas
- Mechanics of Materials
- General Materials Science