Effect of adding Cr, Ni and Mo on quench and temper microstructure and mechanical properties of a Si-Mn spring steel

2021 ◽  
Author(s):  
Richard Nkhoma ◽  
Kofi A. Annan ◽  
Charles Siyasiya
Keyword(s):  
Mechanical Properties ◽  
Spring Steel ◽  
Microstructure And Mechanical Properties

Effect of austenitizing temperatures on the microstructure and mechanical properties of AISI 9254 steel

2021 ◽  
Vol 63 (1) ◽  
pp. 48-54
Author(s):  
Ömer Faruk Murathan ◽  
Kemal Davut ◽  
Volkan Kilicli
Keyword(s):  
Mechanical Properties ◽  
Experimental Studies ◽  
Total Elongation ◽  
Spring Steel ◽  
Isothermal Heat Treatment ◽  
Microstructure And Mechanical Properties ◽  
Heat Treated ◽  
Fine Pearlite ◽  
Silicon Spring ◽  
Start Temperature

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 ~2060 MPa, a total elongation of ~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 °C) from an austenitizing temperature of 870 °C.

Microstructure and Mechanical Properties of Austempered Medium-Carbon Spring Steel

2018 ◽  
Vol 24 (4) ◽  
pp. 693-701 ◽  
Author(s):  
Seong Hoon Kim ◽  
Kwan-Ho Kim ◽  
Chul-Min Bae ◽  
Jae Sang Lee ◽  
Dong-Woo Suh
Keyword(s):  
Mechanical Properties ◽  
Spring Steel ◽  
Medium Carbon ◽  
Microstructure And Mechanical Properties
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