Authors:
Elin Olsson (1), Jean-Marc Lardon (2), Nicolas Stern (3), Stefan Sundin (1)
1- Erasteel, Sweden
2- Aubert&Duval, France
3- Erasteel, France
Abstract:
Martensitic stainless steels are highly alloyed in C, Cr and Mo for hardness and corrosion resistance and often in V for increased wear resistance. Due to the high alloying content, powder metallurgy (PM) including gas atomization and hot isostatic pressing (HIP) is the best technique to eliminate segregation and thus to increase properties such as strength, fatigue resistance etc. However, further improvement of properties is made possible thanks to the recent developments of gas atomization process, which give very low levels of non-metallic inclusions. High cleanliness of PM material is well known to be critical for good polishing ability, fatigue resistance, strength etc. This paper describes results regarding the effect of cleanliness and heat treatment on the impact toughness and salt spray corrosion resistance of PM martensitic stainless grades containing 14 % Cr, more than 2% C and 10% Mo + V.
DOI:
https://doi.org/10.59499/EP235764056