Filtern
Erscheinungsjahr
Dokumenttyp
- Vortrag (8)
- Zeitschriftenartikel (7)
- Beitrag zu einem Tagungsband (7)
- Corrigendum (2)
- Dissertation (1)
Schlagworte
- Welding (8)
- Creep-resistant steel (4)
- Stress relief cracking (4)
- 13CrMoV9-10 (3)
- Post weld heat treatment (3)
- Schrumpfbehinderung (3)
- Eigenspannungen (2)
- Heat control (2)
- High-strength steel (2)
- Large-scale test (2)
Organisationseinheit der BAM
Eingeladener Vortrag
- nein (8)
Realization and safe operation of modern welded structures are progressively requiring for base and filler materials to cope with continually increasing loads, Analyses with a view to crack prevention therefore need to accommodate particularly the structural design (restraint intensity) and the thermomechanical effects in terms of stresses introduced during welding, Against this background, multi-run welding experiments were carried out in an IRC - (Instrumented Restraint Cracking) Test under defined restraint intensity in order to examine the influence of heat control (preheating and interpass temperatures) on the weldinq-specific forces and stresses, The experiments revealed significant rises in the reaction force and stress after welding with increasing preheating and interpass temperature, Furthermore, various concepts for calculating the preheating temperature are discussed, It is demonstrated that the hitherto existing concepts for high-strength finegrained structural steels can lead to divergent results.
Hydrogen Diffusion in Steel
(2013)
A 20 mm thick heat resistant 13CrMoV9-10 steel was welded using a multi-pass submerged arc tandem setup on a 3-D testing facility designed to prevent shrinkage both during the welding and the subsequent cooling to room temperature. The effects of variations in pre-heating and interpass temperatures on the local stresses were monitored by in situ measurement of reaction forces and bending moments during welding and the subsequent dehydrogenation heat treatment. The austenite to bainite transformation and its effects on the overall loads were monitored through the use of a high sampling rate. Increasing the pre-heating and interpass temperatures led to a rise in reaction forces and bending moments. The bending moments originated from the eccentric force transmission over the backing, with a concomitant risk of fracture, especially in the critical root zone. Although the pre-heating and interpass temperatures had a strong effect on the reaction forces, their effect on the bending moments upon cooling to room temperature was negligible.