低温板坯加热取向3%硅钢热轧板的研究

A Study on Texture in Hot Rolled Plate of Grain-Oriented 3%Si Steel with Slab Reheating at Low Temperature

研究的两种取向硅钢(%:No1-0.042C、3.16Si、0.009Al、0.07Mn、0.50Cu、0.015S、0.0084N和No2-0.040C、3.20Si、0.014Al、0.22Mn、0.49Cu、0.016S、0.008 2N)由50 kg真空感应炉冶炼,锻成(mm)350×120×35板坯,经1 250℃30 min加热,开轧温度1 100℃,5道次热轧成2.3 mm板,终轧温度950～1 000℃。实验结果表明,两热轧板沿板厚方向存在组织和织构的不均匀性,热轧板次表层为再结晶组织,有较强的Goss织构组分;中心层为形变组织,具有典型的形变织构。含0.22%Mn的No2钢次表层{110}〈001〉织构组分比含0.07%Mn的No1钢弱,中心层{001}〈110〉织构组分大大强于0.07%Mn No1钢,导致两者磁性能差异,0.22%Mn No2钢磁感应强度(B_(800))和铁损(P_(1.7/50))分别为1.87 T和1.24 W/kg,0.07%Mn No1钢分别为1.88 T和1.18 W/kg。

Studied both grain-oriented silicon steels（%：No1- 0.042C,3.16Si,0.009Al,0.07Mn,0.50Cu, 0.015S,0.0084N and No2-0.040C,3.20Si,0.014Al,0.22Mn,0.49Cu,0.016S,0.0082N） are melted by a 50 kg vacuum induction furnace,forged to（mm） 350×120×35 slab,heated at 1 250℃for 30 min,with beginning rolling temperature 1 100℃hot-rolled to 2.3 mm plate by 5 passes,finishing-rolled at 950～1000℃.Test results show that the structure and texture along thickness of both hot-rolled plates are inhomogeneous：the subsurface layer is recrystallized structure which has a high Goss texture;the central layer is deformed structure which has typical deformation texture.The subsurface layer {110}001 texture component in 0.22%Mn No2 steel plate is weaker than that in 0.07%Mn No1 steel plate,while the central layer {001}110 texture component is greatly intensive than that in 0.07%Mn No1 steel plate,led to difference of magnetic properties between both plates,the magnetic induction（B_（800）） and iron loss（P_（1.7/50）） of 0.22%Mn No2 steel plate are respectively 1.87 T and 1.24 W/kg,while that of 0.07%Mn Nol steel plate are respectively 1.88 T and 1.18 W/kg.