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30. Structural Aspects of Execution and Thermal Treatment of Welded Joints of Hardox Extreme Steel.

Author

Konat, Łukasz

Subjects
WELDED joints, STEEL welding, SUBMERGED arc welding, STEEL, HEAT treatment
Abstract

The paper presents structure and mechanical properties of welded joints of the high-strength, abrasive-wear resistant steel Hardox Extreme. It was shown that, as a result of welding this steel, structures conducive to lowering its abrasion-wear resistance are created in the heat-affected zone. Width of the zone exceeds 60 mm, which results in accelerated wear in the planned applications. On the grounds of the carried-out examinations of structures and selected mechanical properties, a welding technology followed by heat treatment of heat-affected zones was suggested, leading to reconstruction of HAZ structures that is morphologically close to the base material structure. In spite of high carbon equivalent (CEV) of Hardox Extreme, the executed welding processes and heat treatment did not result in the appearance, in laboratory conditions, of welding imperfections in the welded joints. [ABSTRACT FROM AUTHOR]

Published
2019
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