NiFe轧制盘条拉拔断丝原因分析
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摘要
本文利用金属氧氮分析仪(TC436型)、金相显微镜(2G-200L型)和电子探针(IXA-8800R型)对断丝样品进行气体含量、金相组织及断口形貌分析,分析了经过酸洗过后的NiFe轧制盘条在拉拔过程中出现频繁断丝现象的主要原因。结果表明,主要原因一是轧制盘元表面氧化严重,氧化层酸洗时疏松层被融掉,致密层无法去除,酸洗过度,导致存盘条表面存在凸凹不平缺陷;二是轧制盘条存在裂纹缺陷。
NiFe rolled wire rod after pickling during drawing appeare frequently broken wires. Gas content, microstructure and fracture morphology on the broken wire samples was analyzed by metal oxygen nitrogen analyzer(TC436), metallographic microscope(2G-200L) and electron probe microanalysis(IXA-8800R), and study its main reason for frequent broken of wire. The results show that, there are two main reasons by drawing rod broken wire, First, the surface of rolling wire rod are seriously oxidized.During pickling on oxide layer the loose layer was melt and compact layer can not be removed. Pickling is excessive and cause uneven defects exist on surface, another aspect is the crack defect in the rolling rod.
NiFe rolled wire rod after pickling during drawing appeare frequently broken wires. Gas content, microstructure and fracture morphology on the broken wire samples was analyzed by metal oxygen nitrogen analyzer(TC436), metallographic microscope(2G-200L) and electron probe microanalysis(IXA-8800R), and study its main reason for frequent broken of wire. The results show that, there are two main reasons by drawing rod broken wire, First, the surface of rolling wire rod are seriously oxidized.During pickling on oxide layer the loose layer was melt and compact layer can not be removed. Pickling is excessive and cause uneven defects exist on surface, another aspect is the crack defect in the rolling rod.
引文
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