Affiliation:
1. Faculty of Mechanical Engineering, Belgrade
2. Institute for testing of materials IMS, Belgrade
3. Institute "Kirilo Savić", Belgrade
Abstract
The steam pipe line (SPL) and steam line material, along with its welded
joints, subject to damage that accumulates during operation in coal power
plants. As a result of thermal fatigue, dilatation of SPL at an operating
temperature may lead to cracks initiation at the critical zones within heat
affected zone (HAZ) of steam pipe line welded joints. By registration of
thermal cycle during welding and subsequent HAZ simulation is possible to
obtain target microstructure. For the simulation is chosen heat resisting
steel, 12H1MF (designation 13CrMo44 according to DIN standard). From the
viewpoint of mechanical properties, special attention is on impact toughness
mostly because very small number of available references. After simulation of
single run and multi run welding test on instrumented Charpy pendulum.
Metallographic and fractographic analysis is also performed, on simulated
12H1MF steel from service and new, unused steel. The results and correlation
between microstructure and impact toughness is discussed, too.
Publisher
National Library of Serbia
Subject
Renewable Energy, Sustainability and the Environment
Cited by
8 articles.
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