Effect of purity on the magnetic properties of alloy 79NM
Increasing the cooling rate in the ordering range to 2·103 deg/h improves the magnetic properties of alloy 79NM.
The development of cubic texture during recrystallization leads to lower magnetic permeability and squareness factor.
An increase in the original purity of the material leads to accelerated recrystallization, lowers the temperature threshold of secondary recrystallization, and makes it possible to obtain higher mechanical properties at annealing temperatures not exceeding 1100°.
Secondary recrystallization impairs the magnetic characteristics of alloy 79NM with an isotropic structure, particularly in the high-purity metal.
Magnetic properties comparable with the properties of the EBR heat can be obtained in the alloy with a high concentration of thermodynamically unstable nonmetallic inclusions by raising the annealing temperature.
KeywordsPermeability Mechanical Property Recrystallization Magnetic Property Cool Rate
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