Abstract
There was considered evolution of Microroughnesses of an internal surface of copper pipes under drawing. There was employed procedure of measurement such parameter as roughness Ra on internal surface of pipes after extrusion and after drawing. It was revealed that minimum value Ra is observed for hot extruded pipes. At deformation of drawing until logarithmic quotient 0,417 there is increase of average parameter Ra from 0,20 to 6,16 μm, i.e. approximately in 30 times. The greatest rate of Ra increase was noted in the first pass of drawing, as well established increase of dispersion of measured value on drawing passes. The observable phenomenon is explained by means of a turn of copper grains.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
