Destressing method and device for amorphous alloy transformer iron core

Abstract

The invention discloses a destressing method and device for an amorphous alloy transformer iron core, wherein the method comprises the steps of: loading an iron core to a heating furnace chamber; exhausting the air inside the furnace chamber by injecting an inert gas into the heating furnace chamber; heating up the heating furnace chamber; keeping the temperature of the heating furnace chamber when the iron core temperature reaches a keeping temperature, wherein the iron core keeping temperature is 342-348 DEG C, and the temperature keeping time is 40-50 min; cooling the iron core, wherein the cooling step comprises a step of cooling the heating furnace chamber and a step of cooling the iron core along with the furnace; and keeping to feed the inert gas into the furnace in the processes of heating up, keeping temperature and cooling the heating furnace chamber. By adopting the method and the device disclosed by the invention, the stresses of the amorphous alloy generated in the processes of fast quenching, winding, cutting, forming and the like are effectively eliminated, and no-load loss of the amorphous alloy iron core is obviously reduced.

Description

technical field [0001] The invention relates to the technical field of transformer iron core manufacturing, in particular to a stress relief method and device for an amorphous alloy transformer iron core. Background technique [0002] There are generally two kinds of materials that people come into contact with in daily life: one is crystalline material and the other is amorphous material. The so-called crystalline material refers to the arrangement of atoms inside the material follows certain rules. Conversely, if the internal atomic arrangement is in a random state, it is an amorphous material. General metals, whose internal atoms are arranged in an orderly manner, are all crystalline materials. The study found that after the metal is melted, the internal atoms are in an active state. Once the metal starts to cool, the atoms will slowly arrange in an orderly manner according to a certain crystal state law as the temperature drops, forming a crystal. If the cooling proce...

AI Technical Summary

Problems solved by technology

However, the heat preservation temperature of the above first patent is 480°C, which is higher than the Curie temperature, and the effect of stress relief is not obvious

The furnace temperature range of the second patent is 300-400°C, and the temperature range of the amorphous alloy core is 290-390°C. When the amorphous alloy material is annealed, it is sensitive to temperature and time, and only at a narrow temperature and Only within the time range can the best annealing effect be achieved, and the temperature and time range in this patent are too wide, the temperature is too high, the time is too long, the amorphous iron core has a tendency to crystallize, and the amorphous iron core no longer has a low The advantage of no-load loss; if the temperature is too low and the time is too short, the best heat treatment effect will not be achieved, nor will it have low no-load loss

Images