Medical instrument for soft tissue and method for manufacture thereof
AssigneesIndependent Administrative Institution National Institute for Materials Science, Japan Lifeline Co., Ltd.
InventorsDaisuke Kuroda, Takao Hanawa, Morihide Makino, Takashi Kawabata
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Abstract
Ferritic stainless steel was produced by the melting method. The ferritic stainless steel was worked to the shape of a medical device for living soft tissue to obtain a medical device body. The medical device body was brought into contact with gas including nitrogen at a 800° C. treatment temperature or more to make the ferritic stainless steel forming the medical device body absorb the nitrogen and transform at least part of the ferritic stainless steel to austenite.
Claims17
A method for producing a medical device for living soft tissue having:
- a melting step of producing ferritic stainless steel by melting method,
- a working step of working said ferritic stainless steel to the shape of a medical device for living soft tissue to obtain a medical device body, and
- a nitrogen absorption step of bringing said medical device body into contact with a gas containing nitrogen at a predetermined treatment temperature or more to make said ferritic stainless steel forming said medical device body absorb nitrogen to transform at least part of said ferritic stainless steel to austenite.
Dependencies are inferred from the claim text.