Texture evolution of semi-processed non-oriented silicon steel with temper rolling
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摘要: 測定了半工藝無取向電工鋼熱軋(終軋溫度在Ar1以下)到成品各工序的織構,以取向分布函數(ODF)的形式對加臨界變形的半工藝無取向硅鋼的織構演變作了分析.發現其熱軋板表層織構基本是典型的鐵素體再結晶{111}組分,心部和1/4厚度處以鐵素體剪切織構和軋制變形織構為主.冷軋變形后,心部和表層織構組分比較接近,{111}、{112}和{100}面織構都增加,但{111}組分增加最明顯.軟化退火后,{001}<110>與{112}<110>組分迅速降低,織構組分以γ纖維織構為主.通過增加臨界變形,在最終去應力退火后,{111}不利面織構大量減少,高斯組分增加明顯.Taylor因子可以表征不同取向晶粒對變形能的儲存能力,從軋制變形時Taylor因子的分布可以解釋該實驗結果.Abstract: Macrotextures of a semi-processed non-oriented silicon steel were measured in the production process from hot rolling (with the finish rolling temperature below Ar1) to final stress relief annealing, and the texture evolution were analyzed in the form of orientation distribution function. It was found that the main component in the surface layer of a hot rolled strip was {111}plane texture resulting from ferritic recrystallization; while shear texture and rolling texture were dominant at the center and at the 1/4 thickness of the strip. After cold rolling, the texture components at the center and in the surface were similar. The fractions of {111}, {112} and {00} plane textures all increased, particularly {111} component was intensified most significantly. After softening annealing, the fractions of {001}〈110〉 and {112} 〈110〉 components both decreased rapidly and T fiber emerged as the dominant component. When the primarily annealed strip was subjected to temper rolling and subsequent stress relief annealing, the unfavorable { 111} plane texture diminished while the GOSS component increased distinctly. Such experimental results could be explained by the calculated Taylor factor distribution since Taylor factors quantitatively linked deformation stored energy in grains to orientations of the grains.
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Key words:
- non-oriented silicon steel /
- orientation distribution function /
- temper rolling /
- texture
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