WELDABILITY OF AUSTENITIC HEAT-RESISTING STEELS
Date Issued
2023-10-27
Author(s)
Grncharevska, Elena
Bogatinoski, Zoran
Krstevska, Aleksandra
Abstract
Austenitic heat-resisting steels are used in a
wide range of industries. Their use is motivated not only
by their excellent mechanical properties but also due to
their excellent resistance to corrosion and the ability to
withstand high temperatures. These steels are prone to
defects and challenges during welding because of their
high content of Cr, Ni, Al, and other alloying elements.
The main problem is the high heat energy input, which
causes differences in structure between the welded joint
and the surrounding area. The relatively high heat input and cooling in the heat-affected zone (HAZ) causes carbide formation and, as a result, coarse-grain
formation, which is undesirable for obtaining favorable
mechanical properties. This study investigates the
weldability of two heat-resistant austenitic steels (EN
X12CrNi23-13 and EN X8CrNi25-21) using the gas
tungsten arc welding (GTAW) technique. Both
materials are separately analyzed, and the results are
discussed in terms of potential welding techniques and
technological plan improvements to achieve high
quality welds without pre-heating or any other
additional post-welding heat treatment, which is
important for the industry because it can reduce
production time and cost.
wide range of industries. Their use is motivated not only
by their excellent mechanical properties but also due to
their excellent resistance to corrosion and the ability to
withstand high temperatures. These steels are prone to
defects and challenges during welding because of their
high content of Cr, Ni, Al, and other alloying elements.
The main problem is the high heat energy input, which
causes differences in structure between the welded joint
and the surrounding area. The relatively high heat input and cooling in the heat-affected zone (HAZ) causes carbide formation and, as a result, coarse-grain
formation, which is undesirable for obtaining favorable
mechanical properties. This study investigates the
weldability of two heat-resistant austenitic steels (EN
X12CrNi23-13 and EN X8CrNi25-21) using the gas
tungsten arc welding (GTAW) technique. Both
materials are separately analyzed, and the results are
discussed in terms of potential welding techniques and
technological plan improvements to achieve high
quality welds without pre-heating or any other
additional post-welding heat treatment, which is
important for the industry because it can reduce
production time and cost.
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