347 ndi chitsulo chosapanga dzimbiri cha austenitic chokhala ndi niobium, pomwe 347H ndi mtundu wake wokhala ndi kaboni wambiri. Ponena za kapangidwe kake,347itha kuoneka ngati alloy yomwe imachokera pakuwonjezera niobium pansi pa chitsulo chosapanga dzimbiri cha 304. Niobium ndi chinthu chosowa chapadziko lapansi chomwe chimagwira ntchito mofanana ndi titaniyamu. Ikawonjezeredwa ku alloy, imatha kukonza kapangidwe ka tirigu, kupewa dzimbiri pakati pa granular, ndikulimbikitsa kuuma kwa ukalamba.
Ⅰ. Yogwirizana ndi miyezo ya dziko
| 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. KUPANGIDWA KWA S34700 Mzere wachitsulo chosapanga dzimbiri
| Giredi | C | Mn | Si | S | P | Fe | Ni | Cr |
| 347 | 0.08 payokha | 2.00max | 1.0 yokwanira | 0.030max | 0.045 pasadakhale | Mphindi 62.74 | 9-12max | 17.00-19.00 |
| 347H | 0.04 – 0.10 | 2.0 payokha | 1.0 yokwanira | 0.030 pasadakhale | 0.045 pasadakhale | Mphindi 63.72 | 9-12max | 17.00 – 19.00 |
Ⅲ.347 347H Chitsulo chosapanga dzimbiri Kapangidwe ka Makina
| Kuchulukana | Malo Osungunuka | Mphamvu Yokoka (MPa) mphindi | Mphamvu Yopereka 0.2% Umboni (MPa) mphindi | Kutalika (% mu 50mm) mphindi |
| 8.0 g/cm3 | 1454 °C (2650 °F) | Psi – 75000 , MPa – 515 | Psi – 30000 , MPa – 205 | 40 |
Ⅳ. Katundu wazinthu
①Kukana dzimbiri kwabwino kwambiri kofanana ndi chitsulo chosapanga dzimbiri cha 304.
② Pakati pa 427 ~ 816℃, imatha kuletsa kupangika kwa chromium carbide, kukana kukhudzidwa, komanso kukana dzimbiri la intergranular.
③Imakhalabe ndi mphamvu zina zotha kuzizira m'malo amphamvu ophikira ndi kutentha kwakukulu kwa 816℃.
④Yosavuta kutambasula ndi kupanga, yosavuta kuwotcherera.
⑤Kulimba kwabwino kwa kutentha kochepa.
Ⅴ. Nthawi zogwiritsira ntchito
Kugwira ntchito kwa kutentha kwambiri kwa347 ndi 347HChitsulo chosapanga dzimbiri ndi chabwino kuposa cha 304 ndi 321. Chimagwiritsidwa ntchito kwambiri m'mafakitale opanga ndege, petrochemical, chakudya, mapepala ndi mafakitale ena, monga mapaipi akuluakulu otulutsa utsi ndi mapaipi a nthambi zamainjini a ndege, mapaipi otentha a gasi a compressor a turbine, komanso m'magalimoto ang'onoang'ono ndi kutentha kosapitirira 850°C. Zigawo zomwe zimagwira ntchito pansi pa mikhalidwe, ndi zina zotero.
Nthawi yotumizira: Meyi-11-2024