Chiyambi cha Kutentha kwa Alloys
Posankha zipangizo zotenthetsera, zinthu ziwiri nthawi zambiri zimaganiziridwa:Nichrome(Nickel-Chromium) ndiFeCrAl(Chitsulo-Chromium-Aluminium). Ngakhale kuti zonsezi zimagwira ntchito yofanana pakugwiritsa ntchito kutentha koteteza kutentha, zili ndi makhalidwe osiyanasiyana omwe amawapangitsa kukhala oyenera malo ndi ntchito zosiyanasiyana. Kumvetsetsa kusiyana kumeneku ndikofunikira kwambiri posankha zipangizo zoyenera zosowa zanu.
1. Kapangidwe ndi Katundu Woyambira
Nichrome ndi aloyi ya nickel-chromium yomwe nthawi zambiri imakhala ndi 80% nickel ndi 20% chromium, ngakhale pali ma ratios ena. Kuphatikiza kumeneku kumapereka kukana bwino ku okosijeni ndipo kumasunga mphamvu kutentha kwambiri. Aloyi a Nichrome amadziwika chifukwa cha kapangidwe kake komanso magwiridwe antchito okhazikika pa kutentha kwakukulu.
Ma alloy a FeCrAl, monga momwe dzinalo likusonyezera, amapangidwa makamaka ndi chitsulo (Fe) chokhala ndi zowonjezera zambiri za chromium (Cr) ndi aluminiyamu (Al). Kapangidwe kofala kangakhale chitsulo cha 72%, 22% chromium, ndi 6% aluminiyamu. Kuchuluka kwa aluminiyamu kumawonjezera makamaka magwiridwe antchito a alloy kutentha kwambiri komanso kukana okosijeni.
2. Kugwira Ntchito kwa Kutentha
Kusiyana kwakukulu kwambiri kuli mu kutentha kwawo kwakukulu kogwira ntchito:
- Nichrome nthawi zambiri imagwira ntchito mpaka pafupifupi 1200°C (2192°F)
- FeCrAl imatha kupirira kutentha mpaka 1400°C (2552°F)
Izi zimapangitsa FeCrAl kukhala yabwino kwambiri pa ntchito zomwe zimafuna kutentha kwambiri, monga uvuni wa mafakitale kapena zida za labotale zotentha kwambiri.
3.Kukana kwa okosijeni
Ma alloys onsewa amapanga zigawo zoteteza oxide, koma kudzera mu njira zosiyanasiyana:
- Nichrome imapanga gawo la chromium oxide
- FeCrAl imapanga gawo la aluminiyamu oxide (alumina)
Chigawo cha alumina mu FeCrAl chimakhala chokhazikika kwambiri kutentha kwambiri, zomwe zimapangitsa kuti chitetezedwe bwino kwa nthawi yayitali ku okosijeni ndi dzimbiri. Izi zimapangitsa FeCrAl kukhala yofunika kwambiri m'malo omwe ali ndi zinthu zomwe zingawononge.
4. Kukana kwa Magetsi
Nichrome nthawi zambiri imakhala ndi mphamvu yotsutsa magetsi kuposa FeCrAl, zomwe zikutanthauza:
- Nichrome imatha kutulutsa kutentha kwambiri ndi kuchuluka komweko kwa mphamvu yamagetsi
- FeCrAl ingafunike mphamvu yowonjezera pang'ono kuti itenthetse mofanana
Komabe, mphamvu ya FeCrAl yolimbana ndi kutentha imawonjezeka kwambiri, zomwe zingakhale zothandiza pa ntchito zina zowongolera.
5. Katundu wa Makina ndi Kupangika Kwake
Nichrome nthawi zambiri imakhala yopyapyala komanso yosavuta kugwiritsa ntchito kutentha kwa chipinda, zomwe zimapangitsa kuti ikhale yabwino kugwiritsa ntchito pazinthu zomwe zimafuna mawonekedwe ovuta kapena kupindika kolimba. FeCrAl imakhala yopyapyala kwambiri ikatenthedwa, zomwe zingakhale zabwino panthawi yopanga koma zingafunike kusamalidwa mwapadera kutentha kwa chipinda.
6. Zoganizira za Mtengo
Ma alloy a FeCrAl nthawi zambiri amakhala otsika mtengo kuposa Nichrome chifukwa amalowa m'malo mwa okwera mtengonikelindi chitsulo. Kupindula kwa mtengo kumeneku, kuphatikiza ndi magwiridwe antchito apamwamba kwambiri kutentha, kumapangitsa FeCrAl kukhala chisankho chokopa kwambiri pamafakitale ambiri.
N’chifukwa Chiyani Muyenera Kusankha Zogulitsa Zathu za FeCrAl?
Zinthu zathu zotenthetsera za FeCrAl zimapereka:
- Kugwira ntchito bwino kwambiri kutentha (mpaka 1400°C)
- Kukana bwino kwambiri kukhuthala ndi dzimbiri
- Nthawi yayitali yogwira ntchito m'mikhalidwe yovuta kwambiri
- Njira ina yotsika mtengo m'malo mwa ma alloy okhala ndi nickel
- Mayankho osinthika malinga ndi zosowa zanu za pulogalamu
Kaya mukupanga ng'anjo zamafakitale, makina otenthetsera, kapena zida zapadera, zinthu zathu za FeCrAl zimapereka kulimba komanso magwiridwe antchito ofunikira m'malo ovuta.Lumikizanani nafelero kuti tikambirane momwe njira zathu za FeCrAl zingakwaniritsire zosowa zanu za chinthu chotenthetsera pomwe tikukonza ndalama zomwe mumagwiritsa ntchito.
Nthawi yotumizira: Epulo-09-2025
