Research on the surface inclusions in non-oriented silicon steel and their evolutions in the post processes
Non-oriented silicon steels are widely used in a variety of rotating parts such as motors and small transformer cores.In recent years;with the competition in the market;the products with low iron loss;high magnetic induction have been developed and at the same time;much attention are paid to the improvement of the surface quality.The surface inclusions are one of the common defects in non-oriented silicon steels;but the related defect characters and evolution features are rarely investigated.In this paper;by analysis of the characters of the defects;the hot coils with typical defects were chosen to do experiments through shot blasting;normalized annealing,pickling,cold rolling and final annealing.It was founded that the defects can be eliminated for steels with low Si and Al content while the defects cannot be eliminated for steels with medium or high Si and Al content.Based on the experimental results;a semi-quantitative model was proposed.Evolution features of surface inclusions with different Si and Al content were also discussed with deformation resistance of different Si and Al content.Especially;some coils with the defects can be cut through final finishing process to achieve the purpose of the elimination of the defects.
non-oriented silicon steel surface inclusions evolution features
MA Changsong JIANG Feng
Silicon Steel Department,Baoshan Iron & Steel Co.,Ltd.,Shanghai 201900,China Hot Rolling Plant,Baoshan Iron & Steel Co.,Ltd.,Shanghai 201900,China
国内会议
上海
英文
1-5
2013-06-01（万方平台首次上网日期，不代表论文的发表时间）