Weld repair of grade 91 steel without post-weld heat treatment
| Autor: | K. C. Mitchell, S. J. Brett |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Materials science
Mechanical Engineering Metallurgy Alloy steel chemistry.chemical_element Welding engineering.material Condensed Matter Physics law.invention Fracture toughness chemistry Creep Mechanics of Materials law Residual stress engineering General Materials Science Composite material Carbon Normal range Weld metal |
| Zdroj: | Materials Research Innovations. 17:312-317 |
| ISSN: | 1433-075X 1432-8917 |
| Popis: | A weld repair technique to be used without post-weld heat treatment has been developed for use on grade 91 steel. The approach makes use of standard (non- modified) 9CrMo weld metal. The work has extended an approach used successfully on the low alloy steel ½CrMoV, which utilised a low strength 2CrMoL weld metal, to the more advanced steel grade 91, using an equivalently lower strength weld metal, standard (non-modified) 9CrMo. This has considerably lower creep strength than matching modified 9CrMo weld metal. Two variants of standard 9CrMo weld metal were chosen for investigation: a specially commissioned low carbon 9CrMoL version, with carbon below the normal minimum for this grade of weld metal (0·05 wt-%), and a conventional batch of 9CrMo weld metal, but selected to have carbon in the bottom half of the normal range. Comparison between the 9CrMoL weld metal and the standard 9CrMo weld metal, on the basis of residual stress level and creep and fracture toughness properties, has shown the latter to be ... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|