FeCrAl qotishmasi 0cr21al6Nb Spiral elektr hiln isitish bobini isitish elementi
0Cr21Al6Nb1350°C (2550°F) gacha bo'lgan haroratlarda foydalanish uchun temir-xrom-alyuminiy qotishmasi (FeCrAl qotishmasi). Yuqori qarshilik, past harorat koeffitsienti, yuqori ish harorati, yuqori haroratda yaxshi oksidlanishga chidamlilik xususiyatlariga ega qotishma. U kanthal A1, Alloy875, Resistohm 145, Aluchrom0, Alchrome875, MWS-875, Stablohm875 ga teng bo'lishi mumkin.
U sanoat elektr pechlarida, maishiy elektr jihozlarida va uzoq infraqizil nurli qurilmalarda keng qo'llaniladi.
Masalan, panel isitgichlari, infraqizil isitgichlar, isitish plitalari, kartrijli isitgichlar, saqlash isitgichlari, pishirish plitalari uchun keramik isitgichlar, pech elementlari, radiatorlar, xonani isitish uchun kvarts naychali isitgichlar, tosterlar, toster pechlari, sanoat infraqizil quritgichlari, keramik plitalarli pishirish plitalari uchun quyma keramik tolali g'altaklar va boshqalar.
| Qotishma nomenklaturasining ishlashi | 1Cr13AL4 | 0Cr21AL6 | 0Cr21Al4 | 0Cr21Al6Nb | 0Cr27Al7Mo2 | |||
| Asosiy kimyoviy tarkibi | Cr | 12.0-15.0 | 23.0-26.0 | 19.0-22.0 | 20.5-23.5 | 18.0-21.0 | 21.0-23.0 | 26.5-27.8 |
| Al | 4.0-6.0 | 4.5-6.5 | 5.0-7.0 | 4.2-5.3 | 3.0-4.2 | 5.0-7.0 | 6.0-7.0 | |
| Re | qulay | qulay | qulay | qulay | qulay | qulay | qulay | |
| Fe | Dam olish | Dam olish | Dam olish | Dam olish | Dam olish | Dam olish | Dam olish | |
| Nb0.5 | Dushanba 1.8-2.2 | |||||||
| Elementning maksimal uzluksiz ishlash harorati (°C) | 950 | 1250 | 1250 | 1250 | 1100 | 1350-yil | 1400 | |
| 20ºC (μΩ·m) da qarshilik | 1.25 | 1.42 | 1.42 | 1.35 | 1.23 | 1.45 | 1.53 | |
| Zichlik (g/sm3) | 7.4 | 7.1 | 7.16 | 7.25 | 7.35 | 7.1 | 7.1 | |
| Issiqlik o'tkazuvchanligi (KJ/m·h·ºC) | 52.7 | 46.1 | 63.2 | 60.2 | 46.9 | 46.1 | – | |
| Chiziqlar kengayish koeffitsienti (α×10-6/ºC) | 15.4 | 16 | 14.7 | 15 | 13.5 | 16 | 16 | |
| Erish nuqtasi taxminan (ºC) | 1450-yil | 1500 | 1500 | 1500 | 1500 | 1510-yil | 1520-yil | |
| Cho'zilish kuchi (N/mm2) | 580-680 | 630-780 | 630-780 | 630-780 | 600-700 | 650-800 | 680-830 | |
| Yorilish paytidagi cho'zilish (%) | >16 | >12 | >12 | >12 | >12 | >12 | >10 | |
| Maydonning o'zgarishi (%) | 65-75 | 60-75 | 65-75 | 65-75 | 65-75 | 65-75 | 65-75 | |
| Bükme chastotasini takrorlash (F/R) | >5 | >5 | >5 | >5 | >5 | >5 | >5 | |
| Qattiqlik (HB) | 200-260 | 200-260 | 200-260 | 200-260 | 200-260 | 200-260 | 200-260 | |
| uzluksiz xizmat ko'rsatish vaqti (soat/ºC) | – | ≥80/1300 | ≥80/1300 | ≥80/1300 | ≥80/1250 | ≥50/1350 | ≥50/1350 | |
| Mikrografik tuzilish | Ferrit | Ferrit | Ferrit | Ferrit | Ferrit | Ferrit | Ferrit | |
| Magnit xususiyatlari | Magnit | Magnit | Magnit | Magnit | Magnit | Magnit | Magnit | |
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