NiCr 80/20silig buufin kuleyl ahwaa walax tayo sare leh oo loogu talagalay codsiyada buufinta qaansada. Fiiladani waxay ka kooban tahay 80% nikkel iyo 20% chromium, taasoo ka dhigaysa doorasho aad u fiican oo lagu abuuro dahaadh u baahan iska caabin heerkul sare, iska caabin daxalka, iyo iska caabin oksaydh. NiCr 80/20 waxaa si weyn loogu isticmaalaa warshado kala duwan, oo ay ku jiraan hawada sare, korontada, batroolka, iyo wax soo saarka, si loo ilaaliyo loona soo celiyo dusha sare, loo xoojiyo iska caabinta xirashada, loona kordhiyo cimriga qaybaha muhiimka ah. Waxqabadkeeda sare ee jawiga adag wuxuu ka dhigayaa xal lagu kalsoonaan karo oo loogu talagalay codsiyada adag.
Diyaarinta dusha sare ee saxda ah waa muhiim si loo gaaro natiijooyin wanaagsan iyadoo la isticmaalayo silig buufin kuleyl ah oo NiCr 80/20 ah. Dusha sare ee la dahaadhayo waa in si taxaddar leh loo nadiifiyaa si looga saaro wasakhda sida dufanka, saliidda, wasakhda, iyo oksaydhyada. Gubashada jajabka oo leh aluminium oksaydh ama silicon carbide ayaa lagula talinayaa si loo gaaro qallafsanaanta dusha sare ee 50-75 microns. Hubinta dusha sare oo nadiif ah oo qallafsan waxay kor u qaadaysaa dhegganaanta dahaarka buufinta kulaylka, taasoo horseedaysa waxqabad wanaagsan iyo cimri dheer.
| Walax | Halabuurka (%) |
|---|---|
| Nikkel (Ni) | 80.0 |
| Chromium (Cr) | 20.0 |
| Hantida | Qiimaha Caadiga ah |
|---|---|
| Cufnaanta | 8.4 g/cm³ |
| Barta Dhalmada | 1350-1400°C |
| Xoogga Tijaabada | 700-1000 MPa |
| Adkaanta | 200-250 HV |
| Iska caabinta oksaydhka | Aad u fiican |
| Qaboojinta Kulaylka | 15 W/m·K heerkul ah 20°C |
| Kala duwanaanshaha dhumucda dahaadhka | 0.2 – 2.0 mm |
| Daloolada daloolsan | < 1% |
| Xidho Iska caabinta | Sare |
Siligga buufinta kuleylka ee NiCr 80/20 wuxuu bixiyaa xal adag oo wax ku ool ah si loo xoojiyo sifooyinka dusha sare ee qaybaha la kulma xaaladaha daran. Sifooyinka farsamada ee gaarka ah iyo iska caabbinta oksaydhka iyo xirashada ayaa ka dhigaya walxo qiimo leh oo loogu talagalay codsiyada warshadaha kala duwan. Iyagoo adeegsanaya siligga buufinta kulaylka ee NiCr 80/20, warshaduhu waxay si weyn u horumarin karaan waxqabadka iyo cimriga adeegga ee qalabkooda iyo qaybaha.
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