L. A. Maltseva , S. Yu. Mitropolskaya, A. V. Levina
PROGRESS IN ULTRA-DEFORMABLE STAINLESS STEELS FOR MEDICAL TOOL APPLICATION
This paper provides a survey of current trends in stainless steel design with the emphasis on strength mechanisms available for further progress. The paper is focused on deformable austenite and duplex wire steels suitable for intensive plastic strain. The advantages of a newly developed TRIP-steel of Fe-Cr-Ni-Co-Al-Ti composition over conventional stainless steels are discussed in terms of feasibility for large-scale production of tiny cross section medical core tools. High strength and superior formability of the steel makes it possible to avoid costly annealing treatment as a part of the cold deep-drawing technology. Saturation magnetization and coercivity measurements reveal the structural changes in course of deformation and thermal processing.
Keywords: stainless steels, medical core tools, deep drawing, TRIP-effect, magnetic measurements