347 ƙarfe ne mai kama da na niobium wanda ke ɗauke da austenitic steel, yayin da 347H shine sigar carbon mai yawa. Dangane da abun da ke ciki,347ana iya ganinsa a matsayin ƙarfe da aka samo daga ƙara niobium zuwa tushen ƙarfe 304 na bakin ƙarfe. Niobium wani abu ne mai wahalar samu a duniya wanda ke aiki kamar titanium. Idan aka ƙara shi a cikin ƙarfe, yana iya tsaftace tsarin hatsi, ya tsayayya da tsatsa tsakanin granular, da kuma haɓaka taurarewar tsufa.
Ⅰ.Ya yi daidai da ƙa'idodin ƙasa
| 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.SINSIN S34700 SANDAR BAKIN KARFE
| Matsayi | C | Mn | Si | S | P | Fe | Ni | Cr |
| 347 | matsakaicin 0.08 | 2.00max | matsakaicin 1.0 | 0.030max | matsakaicin 0.045 | Minti 62.74 | 9-12max | 17.00-19.00 |
| 347H | 0.04 – 0.10 | matsakaicin 2.0 | matsakaicin 1.0 | matsakaicin 0.030 | matsakaicin 0.045 | Minti 63.72 | 9-12max | 17.00 – 19.00 |
Ⅲ.347 347H Sandunan ƙarfe na bakin ƙarfe Properties
| Yawan yawa | Wurin narkewa | Ƙarfin Tashin Hankali (MPa) min | Ƙarfin Yawa: 0.2% Shaida (MPa) min | Ƙarawa (% a cikin 50mm) minti |
| 8.0 g/cm3 | 1454 °C (2650 °F) | Psi - 75000 , MPa - 515 | Psi - 30000 , MPa - 205 | 40 |
Ⅳ.Kayan aiki
① Kyakkyawan juriyar tsatsa wanda ya yi daidai da ƙarfe 304 na bakin ƙarfe.
② Tsakanin 427 ~ 816℃, yana iya hana samuwar chromium carbide, yana tsayayya da ji, kuma yana da kyakkyawan juriya ga tsatsa tsakanin granular.
③Har yanzu yana da wani juriya na rarrafe a cikin yanayin iska mai ƙarfi tare da babban zafin jiki na 816℃.
④ Yana da sauƙin faɗaɗawa da siffa, mai sauƙin walda.
⑤Kyakkyawan ƙarfin zafin jiki mai kyau.
Ⅴ.Lokutan aikace-aikacen
Ayyukan zafin jiki mai yawa na347 da 347HBakin ƙarfe ya fi na 304 da 321 kyau. Ana amfani da shi sosai a fannin sufurin jiragen sama, sinadarai na petrochemical, abinci, takarda da sauran masana'antu, kamar manyan bututun hayaki da bututun reshe na injunan jirgin sama, bututun iskar gas mai zafi na injin turbine compressors, da kuma a cikin ƙananan kaya da yanayin zafi wanda bai wuce 850°C ba. Sassan da ke aiki a ƙarƙashin yanayi, da sauransu.
Lokacin Saƙo: Mayu-11-2024