Equal channel angular pressing and extrusion of low-carbon steel
Abstract
Combined treatment of low-carbon steel St3sp by means of equal-channel angular pressing and extrusion is presented. The increase in the strength of steel as a result of combined treatment is shown. At the same time, the low temperature (213 K) of testing hardened steel specimens for uniaxial stretching practically does not affect the change in its strength, whereas for steel in the initial state, a decrease in temperature affects the growth of the values of these characteristics. A description of the mechanisms of failure based on the analysis of fractograms of fissures of specimens is performed. A qualitative difference in the mechanism of the destruction of steel before and after the combined treatment has not been established. Destruction of samples from steel St3sp in the initial and reinforced by ECAP and extrusion conditions is viscous with the formation of pits by merging micropores.
Keywords
steel,
equal-channel angular pressing,
extrusion,
strength,
plasticity,
temperature,
specimen,
fracture,
fractogram,
fissure
Supporting agencies: the study was performed on the program of basic scientific research of the State academies of Sciences (the III.28.1.1 project.) with use of the multiple commuting access equipment "Station of Natural Tests" of IFTPS of the SB RAS.
About the Author
Afanasiy Mikhailovich Ivanov
V.P. Larionov’s Institute of the physical and engineering problems of the North, Siberian Department of Russian academy of sciences
Russian Federation
Russian Federation
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Review
For citations:
Ivanov A.M. Equal channel angular pressing and extrusion of low-carbon steel. Arctic and Subarctic Natural Resources. 2018;23(1):60-66. (In Russ.)
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