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Deformation characteristics and grain size effect of thin silicon steel sheet during shearing
Machining Science and Technology ( IF 2.7 ) Pub Date : 2020-02-06 , DOI: 10.1080/10910344.2019.1698613
Yiwei Zhu 1 , Qiusheng Yan 1 , Jiabin Lu 1
Affiliation  

Abstract The characteristics of shearing force and shearing surface, working hardening at the shearing edge, and structural evolution of microstructures during the transverse shearing of thin silicon steel sheet (SSS) were explored. On this basis, the influences of the thickness and grain size of the thin SSS and lateral clearance of the tool on shearing deformation processes were further analyzed. The results showed that on the condition that the grain size of the thin SSS increased, the compatibility of deformation was worsened and thus the orientation of grains influenced the deformation process more, consequently leading to the expansion of the plastically deformed zone and therefore increased shearing force. On the condition of having the same lateral clearance of the tool, with the growth of grain size, the rollover zone of shearing surface increased, the burnish zone reduced, burr increased, the plastically deformed zone size increased, the range and degree of work hardening increased, and the quality of shearing surface was impaired. The shearing of the thin SSS with a large grain size was more sensitive to lateral clearance of the tool: various defects were more likely to occur in the shearing fracture surface.

中文翻译:

薄硅钢片剪切变形特性及晶粒尺寸效应

摘要 研究了硅钢薄板(SSS)横向剪切过程中剪切力和剪切面、剪切边加工硬化和显微组织的结构演变。在此基础上,进一步分析了薄SSS的厚度和晶粒尺寸以及刀具横向间隙对剪切变形过程的影响。结果表明,在薄SSS晶粒尺寸增大的情况下,变形相容性变差,因此晶粒的取向对变形过程的影响更大,从而导致塑性变形区扩大,从而增加剪切力。 . 在刀具横向间隙相同的情况下,随着晶粒尺寸的增长,剪切面翻转区增加,抛光区减少,毛刺增多,塑性变形区尺寸增大,加工硬化范围和程度增大,剪切面质量下降。具有大晶粒尺寸的薄SSS的剪切对工具的横向间隙更敏感:剪切断面更容易出现各种缺陷。
更新日期:2020-02-06
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