Effect of forced cooling after welding on CGHAZ mechanical properties of a martensitic steel
Laitila, Juhani; Larkiola, Jari; Porter, David (2018-06-27)
Laitila, J., Larkiola, J. & Porter, D. Effect of forced cooling after welding on CGHAZ mechanical properties of a martensitic steel. Weld World 62, 1247–1254 (2018). https://doi.org/10.1007/s40194-018-0617-3
© International Institute of Welding 2018. This is a post-peer-review, pre-copyedit version of an article published in Welding in the World. The final authenticated version is available online at: https://doi.org/10.1007/s40194-018-0617-3
https://rightsstatements.org/vocab/InC/1.0/
https://urn.fi/URN:NBN:fi-fe202101283029
Tiivistelmä
Abstract
The effects of forced cooling, meaning forced cooling rate and forced cooling finish temperature, on the tensile and impact toughness properties of simulated weld coarse-grained heat-affected zones have been studied for a commercial grade martensitic steel with a yield strength of 960 MPa. The simulations were done by using a Gleeble 3800 to give forced cooling finish temperatures of 500, 400, 300, 200, and 100 °C and forced cooling rates of 50 and 15 °C/s. For the steel studied, strength significantly increased with no significant negative effects on impact toughness when the steel was cooled rapidly to 200 or 100 °C at 15 °C/s. The results indicate that it may be possible to improve welding productivity and mechanical properties of the steel by using forced cooling down to 100 °C to reduce waiting time between weld passes.
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