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用单片测磁和磁致伸缩测定仪测试了武钢硅铜片厂生产的Hi—B硅铜有,无涂层试样(同一卷)和有涂层试样去掉涂层前后的磁性;在对无涂层试样和去掉涂层试样施加张应力,对有涂层试样施加张应力和压应力情况下,测定它们的磁致伸缩λ_(OP)值,从而确定了T_2涂层对改善Hi—B钢磁性的作用程度。得到的结论是:T_2涂层可使Hi—B硅钢的铁损d_(17)改善4—7％,磁致伸缩λ_(op)值由(+1.3)变为(-0.4);T_2涂层对铁基体产生了约0.30kg/mm~2的张应力;为了进一步改善磁性,施加的张应力约为0.5kg/mm~2为宜;为了充分发挥T_2涂层改善磁性的作用,应要求有好的晶粒度,特别要避免线晶。
Using a single magnetometer and magnetostrictive measuring instrument tested the magnetic properties of Hi-B silicon-copper coated and uncoated samples (same coil) and coated samples before and after coating removal in the WISCO silicon copper sheet factory; Tensile strength and compressive stress were measured on both uncoated and uncoated specimens and their magnetostriction λ_ (OP) values were measured on the coated specimens to determine the T_2 coating pair Improve the degree of magnetic effect of Hi-B steel. The conclusion is that the T 2 coating can improve the iron loss d 17 of Hi-B silicon steel by 4-7% and the value of the magnetostriction λ op from (+1.3) to (-0.4) In order to further improve the magnetic properties, the applied tensile stress is about 0.5kg / mm ~ 2 is appropriate; in order to give full play to T_2 coating to improve the magnetic effect, should be required to have Good grain size, in particular, to avoid the line crystal.