| Jurnal Angkasa Tahun 2011 Oleh Kris Hariyanto |
Pengaruh Post-Weld Heat Treatment Terhadap Ketangguhan Baja Tahan karat Martensitik 13Cr4NiMo |
| ABSTRAK |
| The objective of this research is to study the toughness of post weld heat treatment (PWHT) effect to the martensitic stainless steel, welded with the shielded metal arc welding (SMAW) process using the same filler metal chemical composition as base metal. The region coresponding to the base metal, heat affected zone (HAZ) and weld metal were studied. The post weld heat treatment processes were included oil-quenched, quenched with tempered at 600oC/2h, quenched with solution annealed at 950oC/1h and quenched with solution annealed at 950oC/1h continued tempered at 600oC/2h. The result of tensile tests shows that the tensile strength of specimen that was solution annealed continued tempered is 71kg/mm2, which is lower than the specimen was tempered, 81.39kg/mm2. On the other hand, the impact Charpy value of specimen was solution annealed continued with tempered is 48 Joule, that is higher in comparison with the specimen that was tempered, 39 Joule. The result of microstructure observation, especialy for solution annealed with tempered heat treatment, was obtained uniform microstructure and without delta ferrite, on the other hand quenched with tempered heat treatment have produced tempered of martensite microstructure. Keywords : martensitik stainless steel, post weld heat treatment, toughness, microstructure, mechanical properties |
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