| ZHAO Xia,XU Jia-wen,MA Li-hua,ZHU Yan.The Influence of Diffusion Annealing on the Organization of Hot-dipped Aluminum Coating on the Ductile Iron[J],37(5):15-16,32 |
| The Influence of Diffusion Annealing on the Organization of Hot-dipped Aluminum Coating on the Ductile Iron |
| Received:July 03, 2008 Revised:October 10, 2008 |
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| DOI： |
| KeyWord:Ductile iron Hot-dip Diffusion annealing Al plating |
| Author | Institution |
| ZHAO Xia |
School of Materials Science and Engineering, Heilongjiang University of Science and Technology, Harbin , China |
| XU Jia-wen |
School of Materials Science and Engineering, Heilongjiang University of Science and Technology, Harbin , China |
| MA Li-hua |
School of Materials Science and Engineering, Heilongjiang University of Science and Technology, Harbin , China |
| ZHU Yan |
School of Materials Science and Engineering, Heilongjiang University of Science and Technology, Harbin , China |
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| Abstract: |
| To research the influence of the diffusion annealing on the hot-dipped aluminum ( HDA) on the cast iron, the HDA was taken on the ductile iron substrate. The cross-section of the coating was investigated using SEM, EDS and XRD. The effect of diffusion annealing on the structure of coating of HDA was studied. The results show that the hotdipped coating consists of outer aluminum layer and inner diffusion layers. The former consists of the spiculate FeAl3 phase which formed by the temperature deduction and the latter is composed of the lingulate FeAl3 and Fe2Al5 phases which embedded the substrate. Diffusion annealing was taken at 850℃ , the structure changs apparently with increasing of the diffusion annealing time. The investigations indicate that resistance hot workpiece should be diffusion annealed before being used. |
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