Elektr qarshilik qotishmalari elektr isitgichlarda, xususan, NiCrda keng qo'llaniladi. Nikrom nikel va xrom qotishmasi bo'lib, u 1250 ° C gacha bo'lgan haroratlarda yuqori qarshilik va barqaror oksidlanishga qarshi xususiyatlari tufayli qarshilik simlarini ishlab chiqarishda keng qo'llaniladi, shuning uchun qarshilik simlari bosim va issiqlikka duchor bo'lgan ekstremal muhitda xizmat ko'rsatish uchun juda mos keladi. Vladimir nozik qotishmalar zavodi tashkil etilganidan beri qarshilik qotishmalari va isitish qotishmalarini ishlab chiqarish bilan shug'ullanadi. Bizning kuchimiz simlar, chiziqlar, lenta va folga, shu jumladan NiCr qotishmalari va Fe-Cr-Al qotishmalarini ishlab chiqarishdir.
Baho | Ni80Cr20 | Ni70Cr30 | Ni60Cr23 | Ni60Cr15 | Ni35Cr20 | Karma | Evanohm | |
Nominal tarkibi% | Ni | Bal | Bal | 58,0-63,0 | 55,0-61,0 | 34,0-37,0 | Bal | Bal |
Cr | 20,0-23,0 | 28,0-31,0 | 21,0-25,0 | 15,0-18,0 | 18,0-21,0 | 19.0-21.5 | 19.0-21.5 | |
Fe | ≦1,0 | ≦1,0 | Bal | Bal | Bal | 2,0-3,0 | - | |
Al1,0-1,7 Ti 0,3-0,5 | Al2,7-3,2 Mn0,5-1,5 | Al2,7-3,2 Cu2,0-3,0 Mn0,5-1,5 | ||||||
Maksimal ish harorati (°C) | 1200 | 1250 | 1150 | 1150 | 1100 | 300 | 400 | |
Qarshilik (Ω/cmf, 20℃) | 1.09 | 1.18 | 1.21 | 1.11 | 1.04 | 1.33 | 1.33 | |
Qarshilik (uŌ/m,60°F) | 655 | 704 | 727 | 668 | 626 | 800 | 800 | |
Zichlik (g/sm³) | 8.4 | 8.1 | 8.4 | 8.2 | 7.9 | 8.1 | 8.1 | |
Issiqlik o'tkazuvchanligi (KJ/m·h·℃) | 60.3 | 45.2 | 45.2 | 45.2 | 43.8 | 46,0 | 46,0 | |
Chiziqli kengayish koeffitsienti (×10¯6/℃)20-1000℃) | 18.0 | 17.0 | 17.0 | 17.0 | 19.0 | - | - | |
Erish nuqtasi (℃) | 1400 | 1380 | 1370 | 1390 | 1390 | 1400 | 1400 | |
Qattiqlik (Hv) | 180 | 185 | 185 | 180 | 180 | 180 | 180 | |
Kuchlanish kuchi (N/mm2) | 750 | 875 | 800 | 750 | 750 | 780 | 780 | |
Uzayish (%) | ≥20 | ≥20 | ≥20 | ≥20 | ≥20 | 10-20 | 10-20 | |
Mikrografik tuzilma | ostenit | ostenit | ostenit | ostenit | ostenit | ostenit | ostenit | |
Magnit xususiyat | Yo'q | Yo'q | Yo'q | Bir oz | Yo'q | Yo'q | Yo'q | |
Tez hayot (h/℃) | ≥81/1200 | ≥50/1250 | ≥81/1200 | ≥81/1200 | ≥81/1200 | - | - |
150 0000 2421