EVOLUTION OF MICROROUGHNESSES OF COPPER PIPES’ INSIDE SURFACE IN DRAWING
https://doi.org/10.17073/0021-3438-2014-3-39-44
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.
About the Authors
Yu. N. Loginov
Уральский федеральный университет (УрФУ) им. первого Президента России Б.Н. Ельцина, г. Екатеринбург
Russian Federation
Russian Federation
M. S. Shalayeva
Уральский федеральный университет (УрФУ) им. первого Президента России Б.Н. Ельцина, г. Екатеринбург
Russian Federation
Russian Federation
References
1. Chen Xuesheng, Yi Qin, Raj Balendra // J. Mater. Process. Technol. 2004. Vol. 145. P. 247.
2. Sachtleber M., Raabe D., Weiland H. // J. Mater. Process. Technol. 2004. Vol. 148. P. 68.
3. Stoudt M.R., Levine L.E., Creuziger A., Hubbard J.B. // Mater. Sci. Eng. A. 2011. Vol. 530. P. 107.
4. Кузнецов П.В., Панин В.Е., Левин К.В. и др. // Физ. мезомеханика. 2000. Т. 3, вып. 4. С. 89.
5. Кузнецов Д.Е. // Сучаснi проблеми металлургii. 2008. Т. 11. С. 305.
6. Perry L. Young, Timothy P. Brackbill, Satish G. Kandlikar // Proc. 5-th Intern. conf. on nanochannels, microchannels and minichannels (ICNMM-2007). Puebla, Mexico, 2007. P. 1—10.
7. Kazunari Yoshida, Masaki Watanabe, Hiroshi Ishikawa // J. Mater. Process. Tecnnol. 2001. Vol. 118. P. 251.
8. Розов Н.В. Производство труб. М.: Металлургия, 1974.
9. Колмогоров В.Л. Механика обработки металлов давлением. Екатеринбург: УГТУ—УПИ, 2001.
10. Логинов Ю.Н., Шалаева М.С., Овчинников А.С. // Пр-во проката. 2011. № 7. С. 31.
Review
For citations:
Loginov Yu.N., Shalayeva M.S. EVOLUTION OF MICROROUGHNESSES OF COPPER PIPES’ INSIDE SURFACE IN DRAWING. Izvestiya. Non-Ferrous Metallurgy. 2014;(3):39-44. (In Russ.) https://doi.org/10.17073/0021-3438-2014-3-39-44
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