Φ12.5 mm 82B笔尖状断裂原因分析  

Analysis on Pen-Tip Shaped Fracture ofΦ12.5 mm High Carbon Steel Wire Rod 82B

作　　者：范伟[1] 胡明[1] 王立洲 FAN Wei;HU Ming;WANG Li-zhou(Gansu Jiu Steel Group Hongxing Iron&Steel Co.Ltd.,Jiayuguan 735100,China)

机构地区：[1]甘肃酒钢集团宏兴股份有限公司,甘肃嘉峪关735100

出　　处：《甘肃冶金》2021年第6期73-76,共4页Gansu Metallurgy

摘　　要：通过光学显微镜、能谱仪等分析了Φ12.5 mm 82B盘条笔尖状断口形成的原因和断裂机理。结果表明:盘条芯部的C、Mn元素偏析是产生笔尖状断口的主要原因。通过优化过程控制参数,可将钢丝的C偏析系数由原来的1.35下降至1.09,Mn偏析系数由原来的1.30下降至1.08,笔尖状断口出现几率也随之降低。The cause and mechanism of pen-tip shaped ofΦ12.5 mm wire rod 82B were analyzed by optical microscope and energy dispersive spectrometer.The results show that the carbon and the manganese segregation is the main causes of the fracture.By optimizing process control parameters,the carbon segregation index decreases from 1.35 to 1.09,and the manganese segregation index decreases from 1.30 to 1.08,and the rate of pen-tip shaped fracture further decreases.

关 键 词：高碳82B 笔尖状断口 原因分析 中心偏析 改进措施 

分 类 号：TG356.21[金属学及工艺—金属压力加工]