Effect of Chemistry Modification, Hot Forging and Partitioning on Low Alloy Grade Tool Steel

Development of S6 tool steel has been discussed in this research by conducting a bit modification in the chemical composition using aluminum instead of molybdenum, and micro addition of boron to enhance the marteniste structure. Then, the hardenability and thermal stability have been detected in reg...

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Bibliographic Details
Published in:Key engineering materials 2018-10, Vol.786, p.75-83
Main Authors: Fathy, Ayman M., El-Fawkhry, Mohamed Kamal, Mattar, Taha, Farahat, Ahmed Ismail Zaky
Format: Article
Language:English
Subjects:
Aluminum
Hot forging
Low alloy steels
Organic chemistry
Temperature
Tool steels
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Summary:Development of S6 tool steel has been discussed in this research by conducting a bit modification in the chemical composition using aluminum instead of molybdenum, and micro addition of boron to enhance the marteniste structure. Then, the hardenability and thermal stability have been detected in regarding to S6 tool steel. A novel isothermal treatment process has been suggested to enrich the retained austenite, and thereby, it has been tracked by using XRD, optical microscope, and SEM in conjugation with EDS. The effect of retained on the mechanical properties has been determined. The results ensure that aluminum has inhibited the graphite formation through the slow cooling regime. No change of hardenability or thermal stability of S6 tool steel triggered from adding of aluminum and microaddition of boron. In addition, the novel isothermal process leads to enrichment of retained austenite that has significantly affected on the combination of ductility with strength of the newly designed steel.
ISSN:1013-9826
1662-9795
1662-9795
DOI:10.4028/www.scientific.net/KEM.786.75