THE CROSS-WELD PERFORMANCE OF 9CR CREEP-RESISTANT STEELS, AND THE INFLUENCE OF WELDING PARAMETERS

摘要

9-12%Cr martensitic-ferritic steels continue to be developed for target temperatures of 650°C. This paper reviews the performance of two experimental European steels against the performance of the better known grade 92 alloy. It comments on the problem of type IV cracking and the effect of welding variables on cross-weld creep performance. Preliminary results from an on-going creep test programme are presented in context, and the findings compared with published data. The author acknowledges the VALID project partners, contributors and funding body: Air Liquide Welding, Metrode, Polysoude, E.ON New Build & Technology Ltd, UK, Doosan, Centrica Energy, SSE, Tenaris, TU Chemnitz, The University of Nottingham, The Open University and UK TSB.