347 isimbi isina ngura ine niobium, nepo 347H iriyo ine kabhoni yakawanda. Panyaya yekuumbwa kwayo,347inogona kuonekwa sechiumbwa chinobva mukuwedzera niobium pasi pesimbi isingatsvi 304. Niobium chinhu chisingawanzoitiki chinoshanda zvakafanana netitanium. Kana chikawedzerwa kuchinhu ichi, chinogona kunatsa chimiro chezviyo, kudzivirira ngura pakati pegranular, uye kukurudzira kuomarara kwezera.
Ⅰ. Inoenderana nezvinodiwa nenyika
| China | 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. KUUMBIKA KWEMAKEMIKIRI E S34700 Bhaa resimbi isina ngura
| Giredhi | C | Mn | Si | S | P | Fe | Ni | Cr |
| 347 | 0.08 yakakwira | 2.00max | 1.0 yakakwira | 0.030max | 0.045 yepamusoro | 62.74 maminiti | 9-12max | 17.00-19.00 |
| 347H | 0.04 – 0.10 | 2.0 yakakwira | 1.0 yakakwira | 0.030 yakakwira | 0.045 yepamusoro | 63.72 maminiti | 9-12max | 17.00 – 19.00 |
Ⅲ.347 347H Bhaa resimbi isina ngura Zvimiro zveMichina
| Kuwanda kwevanhu | Nzvimbo Yokunyunguduka | Simba reKusimba (MPa) min | Simba reGoho 0.2% Uchapupu (MPa) min | Kureba (% mu 50mm) min |
| 8.0 g/cm3 | 1454 °C (2650 °F) | Psi – 75000 , MPa – 515 | Psi – 30000 , MPa – 205 | 40 |
Ⅳ. Zvimiro zvezvinhu
①Kudzivirira ngura kwakanyanya kuenzaniswa nesimbi isingasvibi 304.
② Iri pakati pe427~816℃, inogona kudzivirira kuumbwa kwechromium carbide, kuramba kunzwa, uye inodzivirira ngura iri pakati pegranular.
③Ichiri kuramba kukwira kana ichipisa zvakanyanya uye tembiricha yayo iri pa816℃.
④Rakareruka kutambanudza nekuumba, nyore kusundira.
⑤Kusimba kwakanaka kwekupisa kwakaderera.
Ⅴ. Zviitiko zvekushandisa
Kushanda kwekupisa kwakanyanya kwe347&347HSimbi isingasvibiswi iri nani pane ye304 ne321. Inoshandiswa zvakanyanya muindasitiri dzendege, petrochemical, chikafu, bepa nedzimwe nzvimbo, dzakadai semapaipi makuru emagetsi anobuda nemagetsi uye mapaipi emapazi einjini dzendege, mapaipi egasi rinopisa remacompressor eturbine, uye mumitoro midiki netembiricha isingapfuure 850°C. Zvikamu zvinoshanda mumamiriro ezvinhu, nezvimwewo.
Nguva yekutumira: Chivabvu-11-2024