65钢盘条拉拔断裂的原因及预防措施  

Cause of 65 Steel Wire Rod Fracturing During Drawing and Preventive Measures

作　　者：赵琼 刘西峰 袁月 彭兴东[3] 赵磊磊 辛春燕 王亮 王正康 ZHAO Qiong;LIU Xifeng;YUAN Yue;PENG Xingdong;ZHAO Leilei;XIN Chunyan;WANG Liang;WANG Zhengkang(Technical Center of Shanxi Jianlong Industry Co.,Ltd.,Yuncheng 043801,Shanxi China;Xinxing Transportation Construction Co.,Ltd.,Yantai 264006,Shandong China;University of Science and Technology Liaoning,Anshan 11400,Liaoning China)

机构地区：[1]山西建龙实业有限责任公司技术中心,山西运城043801 [2]新兴交通建设有限公司,山东烟台264006 [3]辽宁科技大学,辽宁鞍山114000

出　　处：《热处理》2023年第6期46-48,54,共4页Heat Treatment

摘　　要：Ф6.5 mm的65钢盘条在拉拔成线材的过程中断裂,一个断口呈笔尖状,另一个呈凹坑状。为弄清盘条断裂的原因,对断裂的盘条进行了断口分析、金相检验和能谱分析。结果表明:盘条中心有缩孔和裂纹,索氏体含量较低,而珠光体和网状铁素体含量较高,还有夹渣,导致其塑性变形性能降低从而拉拔时断裂。提出了相应的预防措施。6.5-mm-diam 65 steel wire rod fractured during being drawn out into wire,one fractures was nib-shaped and other was pit-shaped.To find out the cause for its fracturing the fractured wire rod was subjected to fracture test,metallographic examination and energy spectrum analysis.The results indicated that the wire rod exhibited shrinkage cavity and crack in its center,smaller amount of sorbite,pearlite and lager amount of ferrite network as well as slag inclusion,which resulted in reduction in its plastic deformability and its fracturing during drawing.The corresponding preventive measures were put forward.

关 键 词：65钢 拉拔 中心缩孔 索氏体 夹渣 

分 类 号：TG335.6[金属学及工艺—金属压力加工] TG115