Ni含量对富硼型FeSiBCuNbNi合金磁性能的影响

Effect of Ni content on the magnetic properties of boron-rich FeSiBCuNbNi alloy

采用电弧熔炼炉制备母合金锭,使用单辊快淬法制备了Fe Si BCu Nb Ni合金薄带,利用差示扫描量热仪、X射线衍射仪和直流软磁测试设备,对合金的热稳定性、热处理前后物相及Ni含量对富硼型Fe Si BCu Nb Ni合金的非晶形成能力、晶化过程和软磁性能的影响进行了分析.实验结果表明:制备出的Fe_(78-x)Si_(3)B_(16)Cu_(1)Nb_(2)Ni_(x)(x=10,12)非晶态合金的非晶形成能力随Ni含量升高而减弱,生成α-Fe(Ni)单一软磁相的热处理区间变窄;当Fe_(78-x)Si_(3)B_(16)Cu_(1)Nb_(2)Ni_(x)(x=10,12)合金分别在480和470℃下保温10 min时,其矫顽力达到最小值,分别为6.9和8.3 A/m;经普通热处理后,Fe_(68)Si_(3)B_(16)Cu_(1)Nb_(2)Ni_(10)和Fe_(66)Si_(3)B_(16)Cu_(1)Nb_(2)Ni_(12)合金的饱和磁感应强度均为1.28 T,起始磁导率分别为5.6和4.8 K,而Fe_(68)Si_(3)B_(16)Cu_(1)Nb_(2)Ni_(10)合金的磁滞回线的线性度更好.

The influence of Ni content on the amorphous formability,crystallization process and soft magnetic properties of boron-rich Fe Si BCu Nb Ni alloy was studied,the master alloy ingot was prepared by arc melting furnace,and the strip was prepared by single roll rapid quenching method.The thermal stability,phase analysis before and after heat treatment and soft magnetic properties of the alloy were analyzed by DSC,XRD,DC soft magnetic testing equipment,and the Fe_(78-x)Si_(3)B_(16)Cu_(1)Nb_(2)Ni_(x)(x=10,12)amorphous alloy was successfully prepared.The experimental results show that with the increase of Ni content,the amorphous formability of the alloy decreases,and the heat treatment range of formingα-Fe(Ni)single soft magnetic phase becomes narrow.When the Fe_(78-x)Si_(3)B_(16)Cu_(1)Nb_(2)Ni_(x)(x=10,12)alloy was annealed at 480℃and 470℃for 10 min,the coercivity reaches the minimum value of 6.9 A/m and 8.3 A/m,respectively;after annealing,the saturation magnetic induction of Fe_(68)Si_(3)B_(16)Cu_(1)Nb_(2)Ni_(10)and Fe_(66)Si_(3)B_(16)Cu_(1)Nb_(2)Ni_(12)alloys are both 1.28 T,and the initial permeability are 5.6 K and 4.8 K respectively.The linearity of hysteresis loop of Fe_(68)Si_(3)B_(16)Cu_(1)Nb_(2)Ni_(10)alloy is better.