The Microstructure and Property of the Heat Affected zone in C-Mn Steel Treated by Rare Earth
The microstructures and impact properties of the heat affected zone (HAZ) in steel treated by rare earth (RE) under different welding processes were discussed. The effect of Al on the impact properties of the HAZ in RE treated steel was analyzed. It finds that when the welding is smaller than 111 s,...
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Veröffentlicht in: | High temperature materials and processes 2019-02, Vol.38 (2019), p.362-369 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | The microstructures and impact properties of the heat affected zone (HAZ) in steel treated by rare earth (RE) under different welding processes were discussed. The effect of Al on the impact properties of the HAZ in RE treated steel was analyzed. It finds that when the welding
is smaller than 111 s, the main microstructure in steels is bainite/widmanstatten. The impact toughness of the HAZ is lower than that of the steel matrix. When
is more than 250 s, the microstructure is mainly acicular ferrite (AF) in the steel treated by RE, and the impact toughness of HAZ is obviously improved. Even under the welding processing with
about 600 s in RE treated steel can still obtain a lot of AF. While in the steel killed by Al and treated by RE, the main microstructure is parallel cluster of bainite/widmanstatten, and the impact toughness of HAZ is significantly lower than that of low-Al RE treated steel. Al can deteriorate the optimizing of RE treatment on HAZ. |
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ISSN: | 0334-6455 2191-0324 |
DOI: | 10.1515/htmp-2017-0175 |