1. Kev ua haujlwm hauv qhov chaw kub-ib puag ncig
Kev Ua Lag Luam Tawm: Siv cov nplai xoob oxide nplai (Fe₂o₃ / Fe₃o₄) ntawm qhov kubsaum toj 500 ° C (932 ° F), tab sis nplai ua kom muaj zog tshwm sim dhau lub sijhawm.
Tseem ceeb pib:
<500°C: Siv tau rau kev sib quas ntus (piv txwv li, cov qauv sib xyaw ze ze cov chaw kub).
>600 ° C: Oxidation sai sai; tsis pom zoo rau kev siv ntev.
2. Cov kev txwv tseem ceeb
Tsis muaj chromium: Tsis zoo li cov hlau kub-resistant steels (piv txwv li, 309 / 310s), A423 cov ntsiab lus qis (<1.25%) cannot form a stable Cr₂O₃ barrier at high temperatures.
NPLAI SPALLATION: Cyclic ua cua sov / txias ua rau cov roj oxide ua kom cov nplaim pleev xim, ua rau cov hlau tshiab rau cov xim roj ntxiv.
3. Kev ntsuas kev ntsuas
Cov Khaub Ncaws Tiv Thaiv: Siv cov xim xim kub lossis cov txheej txheem txhuas tsis meej.
Kev tsim kho kho kom haum: Zam kev ua kom ncaj ncaj; Siv thermal shields.
4. Kev sib piv rau lwm cov hlau
| Khoom | Max cov kev pabcuam txuas ntxiv temp | Oxidation tsis kam |
|---|---|---|
| A423 | ~ 500 ° C | Ntsig (spalling) |
| 304 Stainless | ~ 900 ° C | Zoo |
| 310s stainless | ~ 1100 ° C | Zoo tshaj |
Tsab ntawv: For sustained high-temperature applications (>500 ° C), txiav txim siab hloov mus rauAustenitic Stainless hlaulossisFe-Ni alloys.
