摘要
采用化学成分、组织、脱碳及硬度、观察断口宏观形貌等检测手段,分析了M2冷拉扁钢在拉拔过程中发生断裂的原因。认为硬度高、塑性差是导致M2冷拉扁钢拉拔断裂的主要原因。而硬度高是由于退火过程中退火炉部分炉丝熔断导致温度不一致造成的。通过排查并恢复退火炉电器元件,对未拉拔的热轧扁钢母材进行二次退火等措施, M2冷拉扁钢拉拔断裂现象得到明显改善。
By means of chemical composition,structure,decarbonization and hardness,and macro-morphology of fracture surface,the causes of M2 cold-drawn flat steel fracture during drawing were analyzed.It is considered that high hardness and poor plasticity are the main causes of drawing fracture.The high hardness is caused by the temperature inconsistency caused by the partial silk fusing of annealing furnace during annealing process.The drawing fracture of M2 cold-drawn flat steel has been obviously improved by checking and restoring the electrical components of annealing furnace,and secondary annealing of base metal of hot rolled flat steel without drawing.
作者
梁敬斌
张磊
何宁
Liang Jingbin;Zhang Lei;He Ning(Heye Science and Technology Co.,Ltd.,Shijiazhuang,Hebei,052165;Hebei High Speed Tool Steel Engineering and Technology Research Center,Shijiazhuang,Hebei,052165)
出处
《河北冶金》
2019年第3期43-45,49,共4页
Hebei Metallurgy
关键词
M2冷拉扁钢
断裂
硬度
二次退火
M2 cold drawn flat steel
fracture
hardness
secondary annealing
