He kila kila austenitic i loaʻa ka niobium ʻo 347, ʻoiai ʻo 347H kona mana kalapona kiʻekiʻe. Ma ke ʻano o ka haku mele ʻana,347hiki ke ʻike ʻia he metala i loaʻa mai ka hoʻohui ʻana i ka niobium i ke kumu o ke kila kila 304. He mea honua kakaikahi ka Niobium e hana like me ka titanium. Ke hoʻohui ʻia i ka metala, hiki iā ia ke hoʻomaʻemaʻe i ke ʻano o ka palaoa, kūʻē i ka pala intergranular, a paipai i ka paʻakikī ʻana o ka wā.
Ⅰ. Kūlike me nā kūlana aupuni
| Kina | GBIT 20878-2007 | 06Cr18Ni11Nb | 07Cr18Ni11Nb(1Cr19Ni11Nb) |
| US | ASTM A240-15a | S34700，347 | S34709，347H |
| JIS | J1S G 4304:2005 | SUS 347 | - |
| DIN | EN 10088-1-2005 | X6CrNiNb18-10 1.4550 | X7CrNiNb18-10 1.4912 |
Ⅱ. KA HOʻOHUI KEMIKALA O KA ʻauamo kila kila S34700
| Papa | C | Mn | Si | S | P | Fe | Ni | Cr |
| 347 | 0.08 kiʻekiʻe | 2.00max | 1.0 kiʻekiʻe loa | 0.030max | 0.045 ka palena kiʻekiʻe | 62.74 minuke | 9-12max | 17.00-19.00 |
| 347H | 0.04 – 0.10 | 2.0 kiʻekiʻe loa | 1.0 kiʻekiʻe loa | 0.030 kiʻekiʻe | 0.045 ka palena kiʻekiʻe | 63.72 minuke | 9-12max | 17.00 – 19.00 |
Ⅲ.347 347H ʻO ke kila kila kila Nā Waiwai Mechanical
| Ka nui o ka paʻa | Kiko Heheʻe | Ikaika Tensile (MPa) min | Ikaika Hua 0.2% Hōʻoia (MPa) min | Elongation (% i loko o 50mm) min |
| 8.0 g/cm3 | 1454 °C (2650 °F) | Psi – 75000 , MPa – 515 | Psi – 30000 , MPa – 205 | 40 |
Nā waiwai o nā mea
①Kūpaʻa maikaʻi loa i ka pala e like me ke kila kila 304.
② Ma waena o 427 ~ 816 ℃, hiki iā ia ke kāohi i ka hoʻokumu ʻia ʻana o ka chromium carbide, kū'ē i ka sensitization, a he kūpaʻa maikaʻi i ka intergranular corrosion.
③ Loaʻa nō iā ia kekahi kūpaʻa kolo i loko o kahi ʻano oxidizing ikaika me ka mahana kiʻekiʻe o 816 ℃.
④Maʻalahi e hoʻolōʻihi a hana, maʻalahi hoʻi e hoʻoheheʻe.
⑤ʻOi aku ka paʻakikī o ka mahana haʻahaʻa.
Ⅴ. Nā manawa noi
ʻO ka hana wela kiʻekiʻe o347&347HʻOi aku ka maikaʻi o ke kila kila ma mua o 304 a me 321. Hoʻohana nui ʻia ia i nā ʻoihana mokulele, petrochemical, meaʻai, pepa a me nā ʻoihana ʻē aʻe, e like me nā paipu nui a me nā paipu lālā o nā mīkini mokulele, nā paipu kinoea wela o nā compressors turbine, a ma nā ukana liʻiliʻi a me nā mahana ʻaʻole iʻoi aku ma mua o 850°C. Nā ʻāpana e hana ana ma lalo o nā kūlana, a pēlā aku.
Ka manawa hoʻouna: Mei-11-2024