Author:
Ustyukhin A S,Zelensky V A,Milyaev I M,Ankudinov A B,Shustov V S
Abstract
Abstract
In present work, we studied the effect of sintering temperature and thermomagnetic treatment (TMT) on the magnetic hysteresis characteristics of the Fe-30Cr-8Co, Fe-30Cr-12Co and Fe-30Cr-16Co (wt. %) powder alloys. All investigated powder alloys, sintered at temperature range of 1100-1400 °C have a high level of magnetic properties ensuring their technical application. The highest values of magnetic properties for all three investigated powder alloys are observed after sintering at 1350 °C: Br = 1,28 T, Hc = 44,3 kA/m, BH(max) = 39 kJ/m3-for Fe-30Cr-8Co alloy; Br = 1,28 T, Hc = 48,2 kA/m, BH(max) = 39,2 kJ/m3-for Fe-30Cr-12Co alloy and Br = 1,23 T, Hc = 54,9 kA/m, BH(max) = 37,6 kJ/m3-for Fe-30Cr-16Co alloy. For Fe-30Cr-8Co alloy it was observed that additional annealing at 500 and 480 °C slightly increases the magnetic properties. For Fe-30Cr-12Co and Fe-30Cr-16Co alloys, there is no clear tendency regarding the effect of additional annealing on the magnetic properties. Compression tests of powder alloys Fe-30Cr-8Co and Fe-30Cr-16Co sintered in the temperature range 1100-1400 °C have shown that the yield strength σ0.2 of the Fe-30Cr-16Co alloy samples (970 – 1080 MPa) are higher compared to the Fe-30Cr-8Co alloy (710 – 930 MPa) throughout the entire sintering temperature range but Fe-30Cr-8Co alloy have a better ductility compared with Fe-30Cr-16Co alloy. Maximum values of σ0.2 were obtained on samples sintered at 1100 °C.
Subject
General Physics and Astronomy
Reference17 articles.
1. New Ductile Permanent Magnet of Fe-Cr-Co System;Kaneko,1971
2. Structure of a W-Enriched Phase in Fe–Co–Cr–W–Ga Alloys;Ivanova;J. Alloys Comp.,2011
3. Heat Treatment and Properties of Plastically Deforming, Highly Coercive Iron Alloy (30% Cr, 15% Co, 2% W, 1% Mo, and 1% Ti);Malinina;Steel in Transl.,2013
4. Concertation-Inhomogeneous Hard Magnetic Alloys of the Fe – Cr – Co System with Elevated Content of Cobalt and Boron;Shatsov;Met. Sci. and Heat Treat.,2017
5. Development of Mo Containing Fe-Cr-Co Permanent Magnets by Modified Single Step Thermomagnetic Treatment;Akbar;IEEE Trans. Magn.,2014