347 shine niobium-dauke da austenitic bakin karfe, yayin da 347H shine babban sigar carbon sa. Dangane da abun da ke ciki,347za a iya gani a matsayin gami da aka samu daga ƙara niobium zuwa tushe na 304 bakin karfe. Niobium wani sinadari ne na duniya da ba kasafai yake yin aiki ba kamar titanium. Lokacin da aka ƙara zuwa gami, zai iya daidaita tsarin hatsi, tsayayya da lalata intergranular, da haɓaka taurin shekaru.
Ⅰ.Mai dace da ka'idojin kasa
| China | GBIT 20878-2007 | 06Cr18Ni11Nb | 07Cr18Ni11Nb(1Cr19Ni11Nb) |
| US | ASTM A240-15 | S34700,347 | S34709, 347H |
| JIS | J1S G 4304:2005 | Farashin 347 | - |
| DIN | EN 10088-1-2005 | X6CrNiNb18-10 1.4550 | X7CrNiNb18-10 1.4912 |
Ⅱ.KASHIN KASHI NA S34700 Bakin Karfe
| Daraja | C | Mn | Si | S | P | Fe | Ni | Cr |
| 347 | 0.08 max | 2.00 max | 1.0 max | 0.030 max | 0.045 max | 62.74 min | 9-12 max | 17.00-19.00 |
| 347H | 0.04 - 0.10 | 2.0 max | 1.0 max | 0.030 max | 0.045 max | 63.72 min | 9-12 max | 17.00 - 19.00 |
Ⅲ.347 347H Bakin Karfe Bar Mechanical Properties
| Yawan yawa | Matsayin narkewa | Ƙarfin Tensile (MPa) min | Ƙarfin Haɓaka 0.2% Hujja (MPa) min | Tsawaitawa (% a cikin 50mm) min |
| 8.0 g/cm 3 | 1454C (2650F) | Psi – 75000, MPa – 515 | Psi - 30000, MPa - 205 | 40 |
Ⅳ.Material Properties
① Kyakkyawan juriya na lalata kwatankwacin 304 bakin karfe.
② Tsakanin 427 ~ 816 ℃, zai iya hana samuwar chromium carbide, tsayayya da hankali, kuma yana da kyau juriya ga lalata intergranular.
③Har yanzu yana da wani juriya mai rarrafe a cikin yanayi mai ƙarfi mai ƙarfi tare da babban zafin jiki na 816 ℃.
④ Mai sauƙin ƙarawa da ƙira, mai sauƙin walda.
⑤ Kyakkyawan ƙarancin zafin jiki tauri.
Ⅴ.Lokacin aikace-aikace
A high-zazzabi yi na347&347Hbakin karfe ya fi na 304 da 321. Ana amfani da shi sosai a jiragen sama, petrochemical, abinci, takarda da sauran masana'antu, irin su sharar manyan bututu da bututun reshe na injin jirgin sama, bututun iskar gas mai zafi na injin turbine, da kuma cikin ƙananan lodi. kuma yanayin zafi bai wuce 850 ° C ba. Sassan da ke aiki a ƙarƙashin sharuɗɗa, da dai sauransu.
Lokacin aikawa: Mayu-11-2024