Fe_(76)Cu_1Nb_2V_1Si_(10)B_(10)新型纳米晶合金的研究

The Studies of New Type of Nanocrystalline Fe 76 Cu 1Nb 2V 1Si 10 Alloy

报道了Ｆｅ７６Ｃｕ１Ｎｂ２Ｖ１Ｓｉ１０Ｂ１０新型纳米晶合金的研究结果。透射电镜和穆斯堡尔谱研究表明，合金经８３３Ｋ×３０ｍｉｎ真空退火，形成由平均晶粒尺寸为１８ｎｍ左右的α－Ｆｅ（Ｓｉ）相（～８６％）和少量非晶组成的显微结构。合金的饱和磁感应强度Ｂ５为１４２Ｔ，ｆ＝１ｋＨｚ时有效磁导率（μｅ）的最大值为５７８％×１０－３Ｈ／ｍ，铁损Ｐ１２／２ｋ≤２２３ｋＷ／ｍ３，Ｐ１１／１０ｋ≤２３７ｋＷ／ｍ３，Ｐ０５／２０ｋ≤１６５ｋＷ／ｍ３，Ｐ０２／１００ｋ≤３１５ｋＷ／ｍ３，矫顽力Ｈｃ≈１３Ａ／ｍ。合金具有明显的磁场处理效果，经纵向磁场退火后其Ｂ３０、Ｂｒ／Ｂ３０分别为１４９Ｔ、０９１，经横向磁场退火后其Ｂ３０、Ｂｒ／Ｂ３０分别为１３５Ｔ、００９。与Ｆｅ７３５Ｃｕ１Ｎｂ３Ｓｉ１３５Ｂ９相比，由于用Ｖ代替部分Ｎｂ，提高了钢水流动性，改善了快淬合金带材的力学特性，降低了成本。

The studies of new type of nanocrystalline Fe 76 Cu 1Nb 2V 1Si 10 B 10 alloy are reported. Jsing transmission electron mocroscope (TEM) and Mssbauer, we found that the annealing of the alloy at 833K for 0.5h in a vacuum tube furnace caused the formation of a nanoscale grains of bcc a-Fe(Si)wit about 86% in volume fraction coexisting with the residual amorphous phase, the average grain size is about 18nm. The B s is 1.42T, the highest value of effective permeability ( μ e) at 1kHz is 57.8×10 -3 H/m, the losses at different frequecies are as follows: P 1 2/2k ≤22 3kW/m 3, P 1 1/10k ≤237kW/m 3, P 0 5/20k ≤165kW/m 3, P 0 2/100k ≤315kW/m 3,and the coercivity ( H c) is about 1 3A/m. The new alloy shows obuious effect of field annealing, the B 30 and B r/ B 30 have reached 1 49T and 0 91, respectively, after annealing in longitudinal magnetic field. whereas B 30 and B R/B 30 are 1.35T and 0.09, respectively, after annealing in transverse magnetic field. Because of partial Nb replacing with V, the fluidity of liquid Fe 76 Cu 1Nb 2V 1Si 10 B 10 alloy and the ductivity of quenching ribbon are better than those of Fe 73 5 Cu 1Nb 3Si 13 5 B 9, and the cost is also reduced.