|About this Abstract
||2010 TMS Annual Meeting & Exhibition
||General Abstracts: Structural Materials Division
||Effect of Ca, Mg and Ti-Mg Addition on the Impact Toughness of Heat Affected Zone in Low Carbon Steel
||Jianghua Ma, Dongping Zhan, Zhouhua Jiang, Jin Yu, Jicheng He, Haijun Shen
|On-Site Speaker (Planned)
In order to understand the effects of deoxidants such as calcium, magnesium and titanium on the impact toughness of heat affected zone, three low carbon steels deoxidized by Ca, Mg and Ti-Mg were obtained respectively. After smelting, forging, rolling and welding simulation, the effects of Ca, Mg and Ti-Mg addition were studied. The inclusion characteristics of samples before welding and the fracture pattern of the specimens after the Charpy-type test were respectively analyzed using optical microscope and scanning electron microscopy. The following results were found. The density of inclusion is raised and the average diameter is decreased after adding alloys, especially when the Ca and Ti-Mg alloys were added, but the density adding Ca decreases 71.8% after 1 hour. The addition of Ti-Mg can enhance the impact toughness of the HAZ after welding simulation. The maximal value of the impact toughness is 66.5J/cm2. And the enhancing mechanism is discussed.
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