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Effect of Hardface Welding Using DUR 65 Electrode and Heat Treatment on Hardness and Microstructure of High Chromium Cast Iron 16%wt Cr - 2% Mo |
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| รหัสดีโอไอ | |
| Creator | Parinyawatr Dhinnabutra |
| Title | Effect of Hardface Welding Using DUR 65 Electrode and Heat Treatment on Hardness and Microstructure of High Chromium Cast Iron 16%wt Cr - 2% Mo |
| Contributor | Sumpao Yotee, Thongchai Khrueaphue, Sarawut Butprom, Rattapon Pawut, Isara Kota |
| Publisher | Faculty of Technical Education, Rajamangala University of Technology Isan, Khonkaen Campus |
| Publication Year | 2568 |
| Journal Title | Journal of Research and Innovation in Industrial Education |
| Journal Vol. | 1 |
| Journal No. | 1 |
| Page no. | 30-45 |
| Keyword | Hardface Welding, High Chromium Cast Iron, Heat Treatment |
| URL Website | https://so14.tci-thaijo.org/index.php/jriie |
| Website title | Journal of Research and Innovation in Industrial Education |
| ISSN | ISSN 3088-1455 (Online) |
| Abstract | This research investigates the effects of hardface welding and heat treatment on the hardness and microstructure of high chromium cast iron. The experimental process consists of four process. Fist, annealing of the Specimens. Next, hardface welding using DUR 65 welding electrode, hardening, and tempering process. Finally, Microstructure analysis is conducted using optical microscope and Vickers hardness testing. The experimental results reveal that the microstructure in the weld metal zone consists of carbides M7C3 alternating with eutectic structures. However, the base metal zone of all four processes exhibit carbides M7C3, Microstructure of matrix varies with the heat treatment process. Annealing specimens show a pearlite structure and Cr23C6 carbides precipitated, while those specimen to welding, hardening, and tempering process show a martensite structure and Cr23C6. Hardness testing indicates that welding and hardening have similar effects on the hardness of the weld metal zone , whereas tempering reduces the hardness. In the base metal zone, annealing specimen results in the lowest hardness, while hardening processes result in the highest hardness. However, the formation of high-hardness carbides makes the pieces brittle, resulting in cracks in the specimen that have undergone welding, hardening, and tempering process. |
