347 ndi niobium yokhala ndi chitsulo chosapanga dzimbiri cha austenitic, pomwe 347H ndi mtundu wake wa carbon wapamwamba. Pankhani ya composition,347chitha kuwonedwa ngati aloyi yochokera pakuwonjezera niobium kumunsi kwa 304 chitsulo chosapanga dzimbiri. Niobium ndi chinthu chosowa padziko lapansi chomwe chimagwira ntchito mofanana ndi titaniyamu. Akawonjezeredwa ku alloy, amatha kuyeretsa kapangidwe ka tirigu, kukana dzimbiri pakati pa granular, ndikulimbikitsa kuuma kwa zaka.
Ⅰ.Mogwirizana ndi mfundo za dziko
| China | GBIT 20878-2007 | Mtengo wa 06Cr18Ni11Nb | 07Cr18Ni11Nb(1Cr19Ni11Nb) |
| US | ASTM A240-15a | S34700,347 | S34709,347H |
| JIS | J1S G 4304:2005 | Mtengo wa 347 | - |
| DIN | EN 10088-1-2005 | X6CrNiNb18-10 1.4550 | X7CrNiNb18-10 1.4912 |
Ⅱ.CHEMICAL COMPOSITION OF S34700 Stainless steel bar
| Gulu | C | Mn | Si | S | P | Fe | Ni | Cr |
| 347 | 0.08 max | 2.00 max | 1.0 max | Kuchuluka kwa 0.030 | 0.045 kukula | 62.74 mphindi | 9-12 max | 17.00-19.00 |
| 347H | 0.04 - 0.10 | 2.0 max | 1.0 max | 0.030 kukula | 0.045 kukula | 63.72 mphindi | 9-12 max | 17.00 - 19.00 |
Ⅲ.347 347H Katundu Wachitsulo chosapanga dzimbiri
| Kuchulukana | Melting Point | Mphamvu ya Tensile (MPa) min | Zokolola Zamphamvu 0.2% Umboni (MPa) min | Elongation (% mu 50mm) min |
| 8.0g/cm3 | 1454 °C (2650 °F) | Psi – 75000 , MPa – 515 | Psi – 30000, MPa – 205 | 40 |
Ⅳ.Zakuthupi
①Kukana kwamphamvu kwa kutukula kofanana ndi 304 chitsulo chosapanga dzimbiri.
② Pakati pa 427 ~ 816 ℃, imatha kuletsa mapangidwe a chromium carbide, kukana kukhudzidwa, komanso kukana bwino kwa dzimbiri la intergranular.
③Ikadali ndi kukana kwina kukwawa m'malo amphamvu oxidizing ndi kutentha kwakukulu kwa 816 ℃.
④Yosavuta kukulitsa ndi kupanga, yosavuta kuwotcherera.
⑤Kulimba kwa kutentha kochepa.
Ⅴ.Nthawi zofunsira
Kuchita kwapamwamba kwa kutentha kwa347 ndi 347Hzitsulo zosapanga dzimbiri ndi bwino kuposa 304 ndi 321. Amagwiritsidwa ntchito kwambiri mu ndege, petrochemical, chakudya, mapepala ndi mafakitale ena, monga utsi mipope waukulu ndi nthambi mipope ya injini ndege, mapaipi otentha mpweya wa turbine compressors, ndi katundu ang'onoang'ono. ndi kutentha kosapitirira 850°C. Zigawo zomwe zimagwira ntchito pansi pazikhalidwe, ndi zina zotero.
Nthawi yotumiza: May-11-2024