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Diffusion of C and Mn in steel weldment Fe-0,3C/Fe-0,3C-15Mn
 Král, L. ; Million, Bořivoj ; Čermák, Jiří
In the present paper, the results of measurements of C and Mn diffusion in steel weldments of ternary alloys Fe-0.3C/Fe-0.3C-15Mn are reported. Alloys were cast in induction furnace under protective Ar atmosphere. Ingots were hot-forged to rods of the diameter 15mm and homogenized. After annealing they were machined on diameter 12mm and cut into pieces of 4mm thickness. These cylindrical samples were ground and welded by electrical impulse. Diffusion couples were sealed into evacuated silica ampoules together with Ti-chips. They were annealed at 500-1100 °C for 1.5-96 hours. Measurement of carbon and manganese redistribution was done by means line segment microanalysis in normal direction to welded interface using electron scanning microscope Philips SEM-505WDS equiped with Microspec WDX-2A. Diffusion coefficients of C and Mn were obtained and the relations between them were found.
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