I-347 iyinsimbi engagqwali equkethe i-niobium, kanti i-347H iyinguqulo yayo enekhabhoni ephezulu. Ngokuphathelene nokwakheka,347kungabonakala njengengxube etholakala ngokufaka i-niobium esisekelweni sensimbi engagqwali engu-304. I-Niobium iyinto yomhlaba engavamile esebenza ngendlela efanayo ne-titanium. Uma ingezwa kungxube, ingalungisa isakhiwo sezinhlamvu, imelane nokugqwala kwe-intergranular, futhi ikhuthaze ukuqina kokuguga.
Ⅰ. Ihambisana nezindinganiso zikazwelonke
| IShayina | I-GBIT 20878-2007 | 06Cr18Ni11Nb | 07Cr18Ni11Nb(1Cr19Ni11Nb) |
| US | I-ASTM A240-15a | S34700，347 | S34709，347H |
| I-JIS | I-J1S G 4304:2005 | I-SUS 347 | - |
| I-DIN | EN 10088-1-2005 | I-X6CrNiNb18-10 1.4550 | I-X7CrNiNb18-10 1.4912 |
Ⅱ. UKUBUMBEKA KWAMAKHEMIKIMI KWE-S34700 Ibha yensimbi engagqwali
| Ibanga | C | Mn | Si | S | P | Fe | Ni | Cr |
| 347 | Umkhawulo ongu-0.08 | 2.00ubuningi | Ubuningi obungu-1.0 | 0.030ubuningi | Umkhawulo ongu-0.045 | 62.74 min | 9-12max | 17.00-19.00 |
| 347H | 0.04 – 0.10 | Ubuningi obungu-2.0 | Ubuningi obungu-1.0 | Umkhawulo ongu-0.030 | Umkhawulo ongu-0.045 | 63.72 amaminithi | 9-12max | 17.00 – 19.00 |
Ⅲ.347 347H Ibha yensimbi engagqwali Izakhiwo Zemishini
| Ubuningi | Indawo Yokuncibilika | Amandla Okudonsa (i-MPa) min | Amandla Okukhiqiza angu-0.2% Ubufakazi (MPa) min | Ukwelulwa (% ngo-50mm) min |
| 8.0 g/cm3 | 1454 °C (2650 °F) | I-Psi – 75000 , i-MPa – 515 | I-Psi – 30000 , i-MPa – 205 | 40 |
Ⅳ. Izakhiwo zezinto ezibonakalayo
①Ukumelana okuhle kakhulu kokugqwala okufana nensimbi engagqwali engu-304.
② Iphakathi kuka-427 ~ 816℃, ingavimbela ukwakheka kwe-chromium carbide, imelane nokuzwela, futhi imelana kahle nokugqwala kwe-intergranular.
③Isenokumelana okuthile nokukhukhuleka endaweni enamandla okuxova i-oxidize enezinga lokushisa eliphezulu elingu-816℃.
④Kulula ukunwebeka nokuyibumba, kulula ukushisela.
⑤Ukuqina okuhle kwezinga lokushisa eliphansi.
Ⅴ. Izikhathi zokufaka isicelo
Ukusebenza kwezinga lokushisa eliphezulu347&347Hinsimbi engagqwali ingcono kuneye-304 kanye ne-321. Isetshenziswa kabanzi ezindizeni, e-petrochemical, ekudleni, ephepheni nakwezinye izimboni, njengemipayipi emikhulu yokukhipha umoya kanye namapayipi amagatsha ezinjini zezindiza, amapayipi egesi ashisayo ama-compressor e-turbine, kanye nasemithwalo emincane kanye namazinga okushisa angadluli ku-850°C. Izingxenye ezisebenza ngaphansi kwezimo, njll.
Isikhathi sokuthunyelwe: Meyi-11-2024