PLASMA WELDING OF HIGH CARBON STEEL AFTER SPD PROCESS

1 OCHODEK Vladislav
Institution:
1 VSB - Technical University of Ostrava, Faculty of Mechanical Engineering, Dept. of Mechanical Technology, Ostrava, Czech Republic, EU, vladislav.ochodek@vsb.cz
Conference:
24th International Conference on Metallurgy and Materials, Hotel Voronez I, Brno, Czech Republic, EU, June 3rd - 5th 2015
Proceedings:
Proceedings 24th International Conference on Metallurgy and Materials
Pages:
804-809
ISBN:
978-80-87294-58-1
ISSN:
2694-9296
Published:
12th January 2015
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
42 views / 11 downloads
Abstract

The methods of intensive plastic deformation SPD (Severe Plastic Deformation) belong to a group of very attractive means of increasing utility properties of metallic materials (strength and structural characteristics). The paper is focused on experimental verification of weldability of high-carbon steel C55E processed by the SPD DRECE (Dual Rolling Equal Channel Extrusion) process. Within experimental works, test welded joints were made from the C55E steel with the use of 15-PAW single or double weld thermal cycle. A test of basic mechanical properties, metallographic examination and an analysis of residual stresses were performed on these joints. Acquired results show that the choice of an appropriate technology and the optimization of welding parameters and thermal cycles allow to achieve solid welds even in the case of materials rather difficult to weld. The optimized welding process does not significantly degrade the properties acquired by SPD.

Keywords: plasma welding, weldability, high-carbon steel, residual stress, severe plastic deformation

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