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Investigation of Cast Copper Structure

Journal of Harbin Institute of Technology(New Series) 2014年第5期21卷 107-111页

作者： r k mysik S V Brusnitsyn A V Sulitsin Ural Federal University

In this paper,the results of exploration macrostructure and microstructure of continuous cast copper bars are shown. Quantitative parameters of copper cast bars depending on the speed of continuous casting are rated. It is fixed that independent of speed of casting the macrocrystalline columnar structure consisting of four zones is formed. By means of raster electron microscopy,the microstructure of cast copper is studied. It is determined that the accumulations of eutectic Cu-Cu2O in the form of lines and gas pores by size from 2 to 35 microns at the boundaries grain are observed. With the use of the transmission electron microscope,specific dislocation configuration on cast copper sub-boundary grains is determined. It indicates to high-temperature strain of cupper in the course of cast bar solidification. The important finding can be used for the design technology of copper continuous casting and plastic working of cast bars.

关键词： copper macrostructure microstructure electronic microscopy hardness cast bar continuous casting defects.

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Calculation of Solidification Process of Continuous Cast Bar

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Journal of Harbin Institute of Technology(New Series) 2014年第5期21卷 112-118页

作者： A I Golodnov r k mysik A V Sulitsin S V Brusnitsyn I A Gruzdeva Ural Federal University

In this paper,it presents the results of calculation of solidification process of copper continuous cast bar by cross section size 120 mm × 70 mm with application of Pro Cast 2010 software. The estimation of mould design effect on solidification process of continuos copper cast bar is completed at various speeds of *** of liquid metal cavities and temperature allocations in the cast bar at various casting speeds are *** analysis of received liquid metal cavity profiles shows that a new mold construction allows significantly decrease of the length of the liquid metal cavity during continuous copper casting at HAZELETTcasting machine and the increase of maximum casting speed from 10 to 11 m / min. Adequacy of the results of copper continuous cast bar solidification process calculation is confirmed by the experimental data.

关键词： continuous casting copper cast bar water cooling mold liquid metal cavity heat emission coefficient calculation of solidification process

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