ʻO 347 kahi kila austenitic i loaʻa i ka niobium, ʻoiai ʻo 347H kona mana kalapona kiʻekiʻe. Ma ke ano o ka haku mele,347hiki ke ʻike ʻia ma ke ʻano he huila i loaʻa mai ka hoʻohui ʻana i ka niobium i ke kumu o 304 stainless steel. ʻO ka Niobium kahi ʻano honua ʻokoʻa e hana like me ka titanium. Ke hoʻohui ʻia i ka huila, hiki iā ia ke hoʻomaʻemaʻe i ke ʻano o ka palaoa, pale i ka corrosion intergranular, a hoʻoikaika i ka paʻakikī makahiki.
Ⅰ.E pili ana i 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.KEMIKAL COMPOSITION O S34700 Pahu kila kila
| Papa | C | Mn | Si | S | P | Fe | Ni | Cr |
| 347 | 0.08 ka nui | 2.00 ka nui | 1.0 ka nui | 0.030 ka nui | 0.045 ka nui | 62.74 min | 9-12max | 17.00-19.00 |
| 347H | 0.04 – 0.10 | 2.0 ka nui | 1.0 ka nui | 0.030 ka nui | 0.045 ka nui | 63.72 min | 9-12max | 17.00 – 19.00 |
Ⅲ.347 347H pahu kila kuhiliʻole Nā pono Mechanical
| ʻO ka mānoanoa | Lae hehee | Ka U'i (MPa) min | ʻO ka ikaika 0.2% Hōʻoia (MPa) min | Elongation (% ma 50mm) min |
| 8.0 g/cm3 | 1454 °C (2650 °F) | Psi – 75000 , MPa – 515 | Psi – 30000 , MPa – 205 | 40 |
Ⅳ.Nā waiwai
①Ka pale ʻino maikaʻi loa e like me 304 kila kila.
② Ma waena o 427 ~ 816 ℃, hiki iā ia ke pale i ka hoʻokumu ʻana o ka chromium carbide, pale i ka sensitization, a maikaʻi ke kūʻē i ka intergranular corrosion.
③Aia mau nō ke kūpaʻa ʻana o ka creep i kahi kaiapuni oxidizing ikaika me kahi mahana kiʻekiʻe o 816 ℃.
④Maʻalahi e hoʻonui a hana, maʻalahi e weld.
⑤Maikaʻi haʻahaʻa wela ʻoʻoleʻa.
Ⅴ.Nā manawa noi
ʻO ka hana wela kiʻekiʻe o347&347Hʻoi aku ka maikaʻi o ke kila kila ma mua o ka 304 a me 321. Hoʻohana nui ʻia ia i ka mokulele, petrochemical, meaʻai, pepa a me nā ʻoihana ʻē aʻe, e like me nā paipu hoʻopau nui a me nā paipu lālā o nā mīkini mokulele, nā paipu kinoea wela o nā turbine compressors, a me nā ukana liʻiliʻi. a me nā mahana ʻaʻole ma mua o 850°C. Nā ʻāpana hana ma lalo o nā kūlana, etc.
Ka manawa hoʻouna: Mei-11-2024