KAJI BANDING KUALITAS REPAIRWELDING DENGAN METODE PENGELASAN OKSI ASETILIN, TIG, DAN MIG DENGAN PERLAKUAN PWHT PADA CASTWHEEL ALUMINIUM
| Main Author: | Nur Wikani, Dita Febriana |
|---|---|
| Format: | Article info application/pdf eJournal |
| Bahasa: | eng |
| Terbitan: |
Jurnal Nosel
, 2014
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| Online Access: |
http://jurnal.fkip.uns.ac.id/index.php/ptm/article/view/8080 http://jurnal.fkip.uns.ac.id/index.php/ptm/article/view/8080/5850 |
Daftar Isi:
- Repair welding is a method to repair the fractures in cast wheel aluminium. The repair welding process will produce residual stress which decrease mechanical characteristics such as strength, hardness, etc. PWHT is a heat treatment which is conducted after welding processwith purpose to decrease the residual stress.The purposes of this study were to determine the comparison of chemical composition, microstructure, hardness value, and impact toughness of cast wheel aluminium on the result of repair welding with Oxy Acetylene, TIG and MIGwelding method with PWHT treatment and raw material specimen. Welding that conducted were Oxy Acetylene, TIG and MIG then followed by PWHT treatment. Test were performed on the study were chemical composition test, microstructure, hardness and toughness. The data obtained from the study were processed using descriptive analysis technique. The result of test showed that the cast wheel aluminium used in this study is aluminium alloy AA4643 series. The percentage of Si elements affect the microstructure of the specimen where the higher the percentage of Si element increasingly clear distinction between the grains of aluminium with Si. The highest average hardness value is in raw material specimen of 42,693 BHN. On specimen which experience welding with PWHT treatment the highest average hardness value in specimen that had Oxy Acetylene welding of 34,624 BHN in the weld area and 31,818 BHN in the HAZ area. The lowest hardness value contained in the TIG specimen at 28,384 BHN on the welding area and in the HAZ area contained in the specimen which experience MIG welding process with average hardness value of 23,677 BHN. The average highest toughness number contained in TIG specimen with 0,12776 joule/mm2, while the lowest toughness number contained in MIG specimen with 0,072 J/mm2.