Through analyzing fracture morphology of line breaking in ultra-fine copper wires during drawing process

origination of line breaking was approached.Some defects are responsible for the occurrence of line breaking

such as gas hole

porosity

inclusion

surface defects and inadequate plasticity in the copper wire billets

and uneven copper line deformation

large deformation force

loss of tool as well as precision and stability of the equipment.Based on defects analysis and practical production

countermeasures were presented.Through optimizing raw materials and mould

and selection of lubricant as well as equipment optimization

occurrence of line breaking can be significantly decreased

realizing the normal production of copper wire.