Effect of austenitizing temperatures on the microstructure and mechanical properties of AISI 9254 steel
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Date
2021
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Walter de Gruyter Gmbh
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Abstract
In this study, the effect of austenitizing temperatures and low-temperature isothermal heat treatment (below martensite start temperature) on the microstructure and mechanical properties of AISI 9254 high silicon spring steel has been investigated. Experimental studies show that ultra-fine carbide-free bainite, tempered martensite and carbon enriched retained austenite could be observed in isothermally heat-treated samples where the as-received sample consisted of fine pearlite. A high tensile strength of similar to 2060 MPa, a total elongation of similar to 8 %, and absorbed energy of 105 J were achieved in a commercial high-Si steel by austempering below the Ms temperature. A good combination of strength and ductility has been obtained in prolonged austempering below the martensite start temperature (225 degrees C) from an austenitizing temperature of 870 degrees C.
Description
Kilicli, Volkan/0000-0002-0456-5987; MURATHAN, ÖMER FARUK/0000-0002-3636-2164; Davut, Kemal/0000-0002-9860-881X
Keywords
High silicon steel, austenitizing temperatures, carbide-free bainite, bainite, martensite
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Citation
6
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Volume
63
Issue
1
Start Page
48
End Page
54