| Autor: |
Ustyukhin, A. S., Zelenskii, V. A., Milyaev, I. M., Alymov, M. I., Kovalev, D. Yu., Shustov, V. S. |
| Zdroj: |
Russian Metallurgy (Metally); Jul2023, Vol. 2023 Issue 7, p933-939, 7p |
| Abstrakt: |
Hard magnetic Fe–30Cr–20Co (wt %) compositions alloyed with to 3 wt % tungsten are obtained by powder metallurgy. The studies of the magnetic properties show that tungsten additions increase coercive force Hc and maximum energy product (BH)max but decrease remanence Br. This effect increases as the tungsten content in the material increases. The maximum values of Hc (55.8 kA/m) and (BH)max (17.2 kJ/m3) are observed for the alloy with 3 wt % W. In this case, the alloys investigated in the present study were found to be sensitive to heat-treatment conditions. According to X-ray diffraction data, the alloys subjected to a complete heat treatment cycle are characterized by the presence of a marked fraction of the nonmagnetic γ phase; however, in this case, the magnetic properties correspond to those observed for analogous as-cast alloys. In the course of compression tests, all compositions alloyed with tungsten fail before reaching a strain of 20%, whereas, under the same condition, the unalloyed Fe–30Cr–20Co (wt %) composition is deformed without failure. Thus, tungsten additions decrease the plasticity of the material. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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