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Fe-Cr-Co永磁合金中元素Co一直作为基体元素来处理的.但随着低Co合金研究工作的进展.Co含量已降低到1～5％,Co完全可以作为合金元素来处理.本文主要研究: 1.经磁性、X-射线结构分析等试验得出.在Fe-(25～32)Cr二元合金中,分别加入1～5％Co.合金的相结构仍为a相,Fe-Cr-Co系合金中的γ、σ等复杂的合金相未出现.Co加入提高了合金的饱和磁化强度、Tc和Spinodal分解温度.可使合金磁场处理温度提高,时间缩短. 2.W、Mo、V、Ti、Nb、Zr、Si、Al等扩大a相区的元素对含Co量高的合金(如Fe-23Cr-15Co)表现出有益作用然而对于具有a相结构的低Co合金(≤5％Co)则没有显示出有益作用,相反,由于非磁性元素加入而使磁性下降. 3.本文提出一种分级磁场处理新工艺.既可缩短时间,又能提高合金的磁性,尤其Hc值如Fe-32Cr-4Co合金,其Br=12.0KG,Hc=670Oe,(BH)_(max)=5.9MGOe,又如Fe-32Cr-3Co合金,其Br=12.0KG.Hc=540Oe,(BH)_(max)=4.7MGOe.
The elemental Co in the Fe-Cr-Co permanent magnet alloy has been treated as the matrix element all the time, but with the progress of low-Co alloy research, the content of Co has been reduced to 1 ~ 5%, and Co can be completely treated as an alloying element. The main research: 1. By magnetic, X-ray structure analysis and other experiments obtained in the Fe- (25 ~ 32) Cr binary alloys were added 1 ~ 5% Co alloy phase structure is still a phase, Fe -Cr-Co-based alloy γ, σ and other complex alloy phase does not appear.Co addition to improve the saturation magnetization of alloy, Tc and Spinodal decomposition temperature can make the alloy magnetic field processing temperature, shorter time .W, The elements that expand the a-phase region such as Mo, V, Ti, Nb, Zr, Si, Al and the like exhibit beneficial effects on the alloys containing a high amount of Co such as Fe-23Cr-15Co. However, for the low-Co alloys having the a-phase structure ≤5% Co) did not show a beneficial effect, on the contrary, due to the addition of non-magnetic elements to make the magnetic decline.3.This paper presents a grading magnetic field processing technology can not only shorten the time, but also improve the magnetic properties of the alloy, especially Hc The value of the Fe-32Cr-4Co alloy, the Br = 12.0KG, Hc = 670Oe, (BH) _max = 5.9MGOe, and the other Fe-32Cr-3Co alloy, the Br = 12.0KG.Hc = 540Oe, ( BH) _ (max) = 4.7MGOe.