摘要
针对高碳钢盘条在拉拔、合股过程中产生劈丝断裂的情况,取样进行金相及扫描电镜和能谱分析,结果表明,盘条表面有较深的裂纹,裂纹两侧无脱碳,在靠近表面的裂纹两侧有块状渗碳体(Fe3C);试样断口呈不规则状,试样表面有大量不规则形状的夹杂物,大多数夹杂物中含有Na元素和K元素。综合分析认为,浇注过程中发生了结晶器卷渣,并导致连铸坯局部增碳,使盘条产生了表面碳化物,从而引起劈丝断裂。
Aiming at the splitting phenomena of high carbon wire rod in the course of drawing or twine,sampling carried through metallographic examination,SEM and EDAX analysis. The results showed that there are rather deep crack on the surface of the wire rod,no decarburizations hereabout the crack and there are massive cementites near the submarginal crack;the fracture texture is abnormity,there are many erose inclusions and there are natrium and kalium in most of the inclusions. Comprehensive analysis considered that mould slag entrapment happened in casting course,causing billet carbon pickup,and then forming surface carbide in wire rod,accordingly resulting in splitting.
出处
《山东冶金》
CAS
2011年第5期87-89,共3页
Shandong Metallurgy
关键词
高碳钢盘条
劈丝断裂
夹杂物
卷渣
high carbon wire rod
splitting
inclusion
slag entrapment
