文章信息/Info

Title:

Effect of Cooling Rate on Recrystallization Texture and Magnetic Induction of 6.5%Si High Silicon Steel

作者:

海龍; 劉靜; 程朝陽; 袁澤喜; 畢云杰; 賈涓; 范麗霞

（武漢科技大學 省部共建耐火材料與冶金國家重點實驗室，湖北 武漢 430081）

Author(s):

LU Hailong; LIU Jing; CHENG Zhaoyang; YUAN Zexi; BI Yunjie; JIA Juan; FAN Lixia

（The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081，China）

關鍵詞:

6.5%Si高硅鋼; 再結晶織構; 殘余應力; 磁感B8

Keywords:

6.5%Si high silicon steel; recrystallization texture; residual stress; magnetic induction B8

分類號:

TM275

DOI:

10.7502/j.issn.1674-3962.201908034

文獻標志碼:

A

摘要:

將6.5%Si高硅鋼薄板在1000 ℃下保溫1 h后，以不同冷卻方式冷卻，通過XRD測試分析試樣的宏觀織構和殘余應力，采用EBSD測量試樣的微觀織構，并通過磁性測量儀測量磁感B8，研究冷卻速度對6.5%Si高硅鋼再結晶織構、殘余應力以及磁感的影響。結果表明，再結晶退火后的冷卻速度對6.5%Si高硅鋼薄板再結晶織構的類型、含量以及分布無顯著影響，但是隨著冷卻速度的降低，{100}和{110}面織構與理想取向的偏離程度減小，對提高磁感B8有利。（100）和（110）面的殘余應力遠大于（111）面的殘余應力，且隨著冷卻速度的降低，試樣中的殘余應力逐漸減小，這是織構偏離程度發生變化的主要原因。隨著冷卻速度的降低，殘余應力引起的晶格畸變減小，則磁化過程中磁疇壁的位移阻力減小，磁感B8逐漸增加。

Abstract:

In this paper, we have studied the effect of cooling rate on the recrystallisation texture, the residual stress and the magnetic induction of 6.5%Si high silicon steel. The thin sample sheets were kept at 1000 ℃ for 1 h and then cooled with different cooling mediums. The macro�瞭exture and the residual stress were measured by XRD, while the micro-texture was analysed by EBSD. Magnetic measuring instrument was used to obtain the magnetic induction B8. The results showed that the cooling rate after recrystallization annealing had no significant effect on the type, content and distribution of recrystallized texture of 6.5%Si high silicon steel. However, with the decrease of cooling rate, the deviation of {100} and {110} fiber textures from the ideal orientation was reduced, which was beneficial to improving magnetic induction B8. The residual stress on (100) and (110) crystal planes was much higher than that on (111) crystal plane. Moreover, as cooling rate decreased, the residual stress in all specimens decreased gradually, which was the main reason for the change in deviation degree of texture. Since the crystal lattice distortion caused by residual stress reduced with the decrease of the cooling rate, the displacement resistance of magnetic domain walls decreased during magnetization. Thus the magnetic induction B8 increased gradually.