稀土对冷轧无取向电工钢成品组织和磁性能的影响

在220mm×1280mm弧形连铸机通过自动喂丝机经金属耳管向结晶器电工钢水(/%:≤0.005C、2.0～2.6Si、0.20～0.30Mn、0.008P、0.001～0.009S、0.15～0.40Al、≤0.0010O])喂稀土丝。通过光学、电子显微镜,系统地研究了钢中稀土含量(0～0.45%RE)对0.5 mm退火的冷轧无取向电工钢成品组织和织构、夹杂物形态和分布,以及磁性能的影响。结果表明,当钢中稀土含量为0.008%～0.020%时,能有效控制细小夹杂物的有害影响,促进退火成品晶粒尺寸增大,增强有利织构组分,显著地改善了冷轧无取向电工钢成品的磁性能。

Effect of Rare Earth Element on Structure and Magnetic Performance of Cold Rolled Non-Oriented Electrical Steel Products

Rare earth element(RE) wire is fed to electric steel liquid(/%:≤0.005C,2.0～2.6Si,0.20～0.30Mn,0.008P,0.001 ~0.009S,0.15 ~0.40A1,≤0.001 0O]) in mold by auto feeding wire machine through a side tube at 220 mm×1 280 mm curved caster.Effect of rare earth element content(0 ~0.45%RE) on structure and texture, morphology and distribution of inclusions,and magnetic performance of 0.5 mm annealed cold rolled non-oriented electrical steel products is systematically studied by optical and electric microscope.Results show that 0.008%~0.020%rare elements in steel,it is available to effectively control the harmful effect of fine inclusions in steel,promote increasing of grain size of annealed products,to intensify favorable texture ingredient and obviously improve magnetic performance of cold rolled non-oriented electrical steel products.