Abstract：In the rolling process of the cold charged 35CrMnSiA large round billet in Laigang special steel division, the billets cracked just like the birds nest, which seriously affected the production efficiency and product quality .In order to solve the defect, survey was did in the rolling mill, the reason was analyzed, the theory was discussed and the heating process was adjusted, and finally the heating process of the large round billets was optimized . the speed of billet reheating was reduced, the residence time of the slab in the preheating zone was extended; through calculating, the heating time of 500mm, 650mm cold billet was determined to be more than 7.5 and 9h respectively, and the nest cracking defects of cold rolling equipment was eliminated.
收稿日期: 2014-04-02
出版日期: 2015-02-15
通讯作者:
刘超群
E-mail: liuchaoqunsky@126.com
引用本文:
刘超群，王宝，马丙涛，闻小德，刘兵. 35CrMnSiA大规格连铸圆坯加热工艺的改进[J]. 中国冶金, 2015, 25(02): 44-46.
LIU Chao-qun,WANG Bao,MA Bing-tao,WEN Xiao-de,LIU Bing. Improvement for the heating process of large size continuous casting round billets 35CrMnSiA. China Metallurgy, 2015, 25(02): 44-46.
2015, Vol. 25 
