PPT Slide
1) Better knowledge of the effects of Ti, S and P on the physical metallurgy of Fe 9Cr martensitic steels.
2) Assessment of heat treatments to obtain doping elements in solid solution in the different steels :
- alloys doped with only Ti : after heat treatment, 1000 ppm can be retained in solid solution
- alloys doped with sulphur : sulphides are very stable MnS, CrS, Ti(C,S) and it appears difficult to put it in solid solution even in a low manganese heat => very strong tendency of sulphur to precipitate.
- alloy doped with phosphorus : possibility to have P in solid solution