347 waa niobium-ka kooban austenitic ahama, halka 347H ay tahay nooca kaarboonka sare. Xagga curinta,347waxaa loo arki karaa sida daawaha ka soo jeeda in lagu daro niobium saldhigga 304 ahama. Niobium waa curiye dhul dhif ah oo u shaqeeya si la mid ah titanium. Marka lagu daro daawaha, waxay sifeyn kartaa qaabdhismeedka hadhuudhka, waxay iska caabin kartaa daxalka intergranular, waxayna kor u qaadi kartaa adkaynta da'da.
Ⅰ.U dhigma heerarka qaranka
| Shiinaha | GBIT 20878-2007 | 06Cr18Ni11Nb | 07Cr18Ni11Nb(1Cr19Ni11Nb) |
| US | ASTM A240-15A | S34700,347 | S34709,347H |
| JIS | J1S G 4304:2005 | SUUS 347 | - |
| DIN | EN 10088-1-2005 | X6CrNiNb18-10 1.4550 | X7CrNiNb18-10 1.4912 |
Ⅱ.QAABKA kiimikaad ee S34700 birta aan birta lahayn
| Darajo | C | Mn | Si | S | P | Fe | Ni | Cr |
| 347 | 0.08 max | 2.00max | 1.0 max | 0.030 max | 0.045 max | 62.74 daqiiqo | 9-12 ugu badnaan | 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 ugu badnaan | 17.00 - 19.00 |
Ⅲ.347 347H Qalabka Makaanikada ah ee birta aan birta lahayn
| Cufnaanta | Meesha dhalaalaysa | Xoogga Jilitaanka (MPa) min | Xoogga Wax-soosaarka 0.2% Caddeynta (MPa) min | Ballaarinta (% gudaha 50mm) min |
| 8.0 g/cm3 | 1454 °C (2650 °F) | Psi – 75000 , MPa – 515 | Psi – 30000 , MPa – 205 | 40 |
Ⅳ.Guryaha agabka
① Iska caabin daxaleed aad u wanaagsan oo la barbardhigi karo 304 bir ah oo aan lahayn.
② Inta u dhaxaysa 427 ~ 816 ℃, waxay joojin kartaa samaynta chromium carbide, iska caabin ah dareenka, oo waxay leedahay iska caabin wanaagsan ee daxalka intergranular.
③Waxa ay wali leedahay iska caabin gurguurta oo gaar ah oo ku jirta deegaan oksaydhaysan oo xoogan oo leh heerkul sare oo ah 816℃.
④ Way fududahay in la dheereeyo oo la sameeyo, si fudud loo alxan karo.
⑤ Adag heerkulka hooseeya oo wanaagsan.
Ⅴ.Munaasabada codsiyada
Waxqabadka heerkulka sare ee347&347Hbirta aan lahayni way ka fiican tahay 304 iyo 321 iyo heerkul aan ka badnayn 850 ° C. Qaybaha ku shaqeeya shuruudaha, iwm.
Waqtiga boostada: Meey-11-2024