Microstructure And Erosion-Corrosion Behaviour Of As-Cast High Chromium White Irons Containing Molybdenum In Aqueous Sulfuric-Acid Slurry
Microstructure and erosion-corrosion behaviour of as-cast high chromium white irons containing molybdenum in aqueous sulfuric-acid slurry was studied. The experimental irons contained 28 wt.%Cr with a Cr:C ratio of about 10 and up to 10 wt.%Mo. The irons with up to 6 wt.%Mo are hypoeutectic, whereas...
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Polish Academy of Sciences
2015-06-01
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| Series: | Archives of Metallurgy and Materials |
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| Online Access: | http://www.degruyter.com/view/j/amm.2015.60.issue-2/amm-2015-0230/amm-2015-0230.xml?format=INT |
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| author | Imurai S. Thanachayanont Ch. Pearce J.T.H. Chairuangsri T. |
| author_facet | Imurai S. Thanachayanont Ch. Pearce J.T.H. Chairuangsri T. |
| author_sort | Imurai S. |
| collection | DOAJ |
| description | Microstructure and erosion-corrosion behaviour of as-cast high chromium white irons containing molybdenum in aqueous sulfuric-acid slurry was studied. The experimental irons contained 28 wt.%Cr with a Cr:C ratio of about 10 and up to 10 wt.%Mo. The irons with up to 6 wt.%Mo are hypoeutectic, whereas the iron with 10 wt.%Mo becomes eutectic/peritectic. Mo addition promotes formation of M23C6 and M6C, instead of typical M7C3. Erosion-corrosion testing was performed in aqueous sulfuric-acid slurry containing alumina particles. The hypoeutectic Fe-28Cr-2.7C-1Mo with mainly M7C3 and the eutectic/peritectic Fe-28Cr-2.6C-10Mo showed reduced wear rates of about 30% and 7% of that of the reference iron without Mo addition, respectively. The reduction of the carbide-matrix hardness difference, the increase of corrosion resistance of the matrices, and the increase of macro-hardness are determining factors for the improvement of erosion-corrosion resistance of the irons. |
| first_indexed | 2024-12-12T05:37:36Z |
| format | Article |
| id | doaj.art-749409d493cc40f0a617e69f899993b7 |
| institution | Directory Open Access Journal |
| issn | 2300-1909 |
| language | English |
| last_indexed | 2024-12-12T05:37:36Z |
| publishDate | 2015-06-01 |
| publisher | Polish Academy of Sciences |
| record_format | Article |
| series | Archives of Metallurgy and Materials |
| spelling | doaj.art-749409d493cc40f0a617e69f899993b72022-12-22T00:36:05ZengPolish Academy of SciencesArchives of Metallurgy and Materials2300-19092015-06-0160291992310.1515/amm-2015-0230amm-2015-0230Microstructure And Erosion-Corrosion Behaviour Of As-Cast High Chromium White Irons Containing Molybdenum In Aqueous Sulfuric-Acid SlurryImurai S.0Thanachayanont Ch.1Pearce J.T.H.2Chairuangsri T.3 DEPARTMENT OF INDUSTRIAL CHEMISTRY, CHIANG MAI UNIVERSITY, CHIANG MAI, 50200, THAILAND NATIONAL METAL AND MATERIALS TECHNOLOGY CENTER, PATHUMTHANI, 12120, THAILAND PANYAPIWAT INSTITUTE OF MANAGEMENT, NONTHABURI, 11120, THAILAND DEPARTMENT OF INDUSTRIAL CHEMISTRY, CHIANG MAI UNIVERSITY, CHIANG MAI, 50200, THAILANDMicrostructure and erosion-corrosion behaviour of as-cast high chromium white irons containing molybdenum in aqueous sulfuric-acid slurry was studied. The experimental irons contained 28 wt.%Cr with a Cr:C ratio of about 10 and up to 10 wt.%Mo. The irons with up to 6 wt.%Mo are hypoeutectic, whereas the iron with 10 wt.%Mo becomes eutectic/peritectic. Mo addition promotes formation of M23C6 and M6C, instead of typical M7C3. Erosion-corrosion testing was performed in aqueous sulfuric-acid slurry containing alumina particles. The hypoeutectic Fe-28Cr-2.7C-1Mo with mainly M7C3 and the eutectic/peritectic Fe-28Cr-2.6C-10Mo showed reduced wear rates of about 30% and 7% of that of the reference iron without Mo addition, respectively. The reduction of the carbide-matrix hardness difference, the increase of corrosion resistance of the matrices, and the increase of macro-hardness are determining factors for the improvement of erosion-corrosion resistance of the irons.http://www.degruyter.com/view/j/amm.2015.60.issue-2/amm-2015-0230/amm-2015-0230.xml?format=INThigh chromium cast ironsmicrostructureelectron microscopyerosioncorrosion |
| spellingShingle | Imurai S. Thanachayanont Ch. Pearce J.T.H. Chairuangsri T. Microstructure And Erosion-Corrosion Behaviour Of As-Cast High Chromium White Irons Containing Molybdenum In Aqueous Sulfuric-Acid Slurry Archives of Metallurgy and Materials high chromium cast irons microstructure electron microscopy erosion corrosion |
| title | Microstructure And Erosion-Corrosion Behaviour Of As-Cast High Chromium White Irons Containing Molybdenum In Aqueous Sulfuric-Acid Slurry |
| title_full | Microstructure And Erosion-Corrosion Behaviour Of As-Cast High Chromium White Irons Containing Molybdenum In Aqueous Sulfuric-Acid Slurry |
| title_fullStr | Microstructure And Erosion-Corrosion Behaviour Of As-Cast High Chromium White Irons Containing Molybdenum In Aqueous Sulfuric-Acid Slurry |
| title_full_unstemmed | Microstructure And Erosion-Corrosion Behaviour Of As-Cast High Chromium White Irons Containing Molybdenum In Aqueous Sulfuric-Acid Slurry |
| title_short | Microstructure And Erosion-Corrosion Behaviour Of As-Cast High Chromium White Irons Containing Molybdenum In Aqueous Sulfuric-Acid Slurry |
| title_sort | microstructure and erosion corrosion behaviour of as cast high chromium white irons containing molybdenum in aqueous sulfuric acid slurry |
| topic | high chromium cast irons microstructure electron microscopy erosion corrosion |
| url | http://www.degruyter.com/view/j/amm.2015.60.issue-2/amm-2015-0230/amm-2015-0230.xml?format=INT |
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