2017-Sustainable Industrial Processing Summit
SIPS 2017 Volume 9. Iron and Steel, Metals and Alloys
| Editors: | Kongoli F, Conejo A, Gomez-Marroquin MC |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2017 |
| Pages: | 242 pages |
| ISBN: | 978-1-987820-77-5 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
CD shopping page
Effect of Austempering Temperature and Time on Mechanical Properties of SAE 9260 Steel
Ranjit Dalwatkar1;1BHARAT FORGE LTD, PUNE INDIA., Pune, India;
Type of Paper: Regular
Id Paper: 309
Topic: 3
Abstract:
This work describes the effect of austempering heat treatment on microstructure and mechanical properties of SAE 9260 steel. Steel samples, austenitized at 900 C for one hour, were isothermally heat-treated in the temperature range 300 to 350 C for different lengths of time. Microstructural characterization was carried out using optical and scanning electron microscopes. The microstructure of the austempered samples consisted of bainitic ferrite and retained austenite. The volume fraction of retained austenite was determined using X-ray diffraction. Isothermal heat treatment at 350 C for 20 min, resulted in a retained austenite content of around 38% in the microstructure. The increase in isothermal transformation temperature led to an increase in the fraction of retained austenite. Additionally, a good combination of strength and ductility was obtained in the samples with increased amounts of retained austenite.