Bakhsheshi Rad, Hamid Reza and Monshi, Ahmad and Monajatizadeh, Hossain and Idris, Mohd. Hasbullah and Abdul Kadir, Mohammed Rafiq and Jafari, Hassan (2012) Effect of multi-step tempering on retained austenite and mechanical properties of low alloy steel. Journal of Iron and Steel Research International, 18 (12). pp. 49-56. ISSN 1006-706X
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Official URL: http://dx.doi.org/10.1016/S1006-706X(12)60009-0
Abstract
The effect of multi-step tempering on retained austenite content and mechanical properties of low alloy steel used in the forged cold back-up roll was investigated. Microstructural evolutions were characterized by optical microscope, X-ray diffraction, scanning electron microscope and Feritscope, while the mechanical properties were determined by hardness and tensile tests. The results revealed that the content of retained austenite decreased by about 2% after multi-step tempering. However, the content of retained austenite increased from 3.6% to 5.1% by increasing multi-step tempering temperature. The hardness and tensile strength increased as the austenitization temperature changed from 800 to 920 °C, while above 920 °C, hardness and tensile strength decreased. In addition, the maximum values of hardness, ultimate and yield strength were obtained via triple tempering at 520 °C, while beyond 520 °C, the hardness, ultimate and yield strength decreased sharply.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Iron and steel research |
| Subjects: | T Technology > TK Electrical engineering. Electronics Nuclear engineering |
| Divisions: | Mechanical Engineering |
| ID Code: | 46861 |
| Deposited By: | Haliza Zainal |
| Deposited On: | 22 Jun 2015 05:56 |
| Last Modified: | 26 Sep 2017 01:34 |
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