Densification Of Metal Powder Extruded AISI 904L To Increase Corrosion Resistance

Authors:

Alexandru Sorea (1), Peter Valler (1), Peter Kjeldsteen (1), Phillip Hjelmeborn Kaae (2)

1- Sintex a/s, Hobro, Denmark

2- Grundfos China Holding Co.Ltd., Suzhou, China

Abstract:

Metal powder extrusion (MPE) of AISI 904L super austenitic stainless steel makes it possible to produce complex structures with a higher corrosion resistance compared to austenitic stainless steels such as AISI 304L and AISI 316L. The initial sintering trials resulted in a porous part with low corrosion resistance. As AISI 904L is a steel with austenitic phase through the entire sintering window, densification during sintering was inhibited which resulted in the reduced corrosion resistance due to open porosities. This paper will show how to enhance densification in order to improve the corrosion resistance closer to the expected level comparable to cast and rolled material but with the shaping possibilities of MPE.

DOI:

https://doi.org/10.59499/EP246278527