Iron-nickel alloy mostly in the alternating magnetic field use, mainly for yoke iron, relay, Small Power Transformers and Magnetically shielded.
Permalloy magnetic shielding to do: In order to prevent interference of external magnetic field, often in CRT, an external CRT electron beam focusing section plus the magnetic shield, you can play the role of magnetic shielding.
Chemical composition
composition | C | P | S | Mn | Si |
≤ | |||||
Content(%) | 0.03 | 0.02 | 0.02 | 0.3~0.6 | 0.15~0.3 |
composition | Ni | Cr | Mo | Cu | Fe |
Content(%) | 79.0~81.0 | - | 4.8~5.2 | ≤0.2 | Bal |
Heat treatment system
shop sign | Annealing medium | heating temperature | Keep the temperature time/h | Cooling rate |
1j85 | Dry hydrogen or vacuum, pressure is not greater than 0.1 Pa | Along with the furnace heating up 1100~1150ºC | 3~6 | In 100 ~ 200 ºC / h speed cooling to 600 ºC, fast to 300 ºC draw a charge |