Process for heat treating and tempering surgical needles

Details Process for heat treating and tempering surgical needles Process for heat treating and tempering surgical needles

1996-11-14

1998-09-29

Yee, Deborah

Metal treatment

Process of modifying or maintaining internal physical...

Heating or cooling of solid metal

606222, 163 5, C21D 926

Patent

active

058141669

ABSTRACT:
A continuous process for heat treating and cleaning and tempering martensitic stainless steel surgical needles is disclosed. The method comprises exposing the surgical needles to a partial vacuum at a temperature less than the heat treating temperature to remove volatile surface contaminant. Then the needles are heat treated in an argon gas environment at a pressure equal to or greater than 1.0 Torr. Next the temperature of the oven is lowered to temper the needles.

REFERENCES:
patent: 3314831 (1967-04-01), Hoenie et al.
patent: 5330441 (1994-07-01), Prasad et al.
patent: 5358577 (1994-10-01), Uehara et al.
patent: 5411613 (1995-05-01), Rizk et al.
patent: 5533982 (1996-07-01), Rizk et al.

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