Abstract
1. To simplify the thermomagnetic treatment of alloys YuNDK38T8 and YuNDK40T8 it is necessary to separate the step of “nuclei formation” from the stage of decomposition. 2. Nuclei of α′ phase can be formed in alloys YuNDK38T8 and YuNDK40T8 without magnetic field with cooling at a rate of 125–280 deg/min in the range of 900–600°. 3. The thermomagnetic treatment developed consists of cooling from the single-phase region to 800–600° at a rate of 125–280 deg/min and high-temperature tempering in magnetic field at 830–850° for 12 min. The thermomagnetic treatment is completed by triple tempering in the range of 650–550°. 4. This method of TMT makes it possible to obtain high magnetic properties in alloys YuNDK38T8 and YuNDK40T8.
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