摘要
针对永兴特种不锈钢股份有限公司303Cu易切削钢φ14 mm大规格线材减定径轧制过程中出现线材头部开裂问题,对其产生原因进行了分析。结果表明,303Cu易切削钢因S含量较高,易形成MnS夹杂,而MnS夹杂的变形能力与钢基体相差较大,在轧制温度较低且轧制力较大的情况下,线材头部容易开裂。为此,对孔型系统进行了改进,减小减径机中的轧制力,使MnS夹杂受到的剪切应力较小,降低了使其脱离基体的可能性,解决了φ14 mm大规格线材头部开裂的问题。
Aiming at the problem of head cracking during reducing and sizing rolling of 303 Cu free-cutting steel of φ14 mm large gauge wire production in Yongxing Special Stainless Steel Co.,Ltd.,the cause was analyzed.The results show that 303 Cu free-cutting steel is easy to form MnS inclusions due to the high S content,and the deformation capacity of MnS inclusions is greatly different from that of the steel matrix.When the rolling temperature is lower and the rolling force is large,the wire head is easy to crack.Therefore,the pass system was improved,the rolling force in the reducing mill was reduced,the shear stress on the MnS inclusion was reduced,and the possibility of leaving the basement metal was reduced.The head cracking problem of φ14 mm gauge wire was solved.
作者
顾建林
俞国红
李少正
胡月霞
彭飞
GU Jian-lin;YU Guo-hong;LI Shao-zheng;HU Yue-xia;PENG Fei(Yongxing Special Stainless Steel Co.,Ltd.,Huzhou 313005,China)
出处
《轧钢》
2020年第3期105-107,110,共4页
Steel Rolling
关键词
303Cu易切削钢
MnS夹杂物
减定径轧机
低温轧制
轧制力
孔型改进
303Cu free-cutting steel
MnS inclusions
reducing and sizing mill
low temperature rolling
rolling force
pass improvement
