Sintered Dual-phase Steels Produced from Pre-alloyed Fe-Cr-Mo Powder
The sintered Fe-Cr-Mo-xC steels (where x = 0.05, 0.15, 0.25, 0.35 and 0.45 wt.% C) were produced by vacuum sintering and followed by slow cooling. The sintered steels showed microstructures consisting of mixed a + a¢ phases. The formation of a¢ phase was discussed with respect to the classical model...
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| Main Authors: | , , , , , , |
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| Language: | English |
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Science Faculty of Chiang Mai University
2019
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| Subjects: | |
| Online Access: | http://it.science.cmu.ac.th/ejournal/dl.php?journal_id=6732 http://cmuir.cmu.ac.th/jspui/handle/6653943832/66092 |
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| Institution: | Chiang Mai University |
| Language: | English |
| Summary: | The sintered Fe-Cr-Mo-xC steels (where x = 0.05, 0.15, 0.25, 0.35 and 0.45 wt.% C) were produced by vacuum sintering and followed by slow cooling. The sintered steels showed microstructures consisting of mixed a + a¢ phases. The formation of a¢ phase was discussed with respect to the classical model for bainitic transformation. The morphologies of the a¢ phase regions changed from a thick film to a dark island to a bulk form with increasing C content. With the added C contents < 0.25 wt.%, the sintered steels showed low tensile strength and hardness but high ductility. When the C contents ≥ 0.25 wt.%, the sintered Fe-Cr-Mo-xC steels gained strength from the a¢ phase, whose volume fraction was increased with increasing C content. |
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