Title:
PARTS PARTIALLY HAVING SUPERELASTICITY, AND ITS MANUFACTURING METHOD
Document Type and Number:
Japanese Patent JP3915543
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a method for manufacturing parts partially having superelasticity, as a typical example, the 'temple' part of spectacle frames by a simple process where a final annealing step is omitted, accordingly at a low cost.
SOLUTION: A material in which transformation temperature is regulated and hardness is controlled is prepared by providing an Ni-Ti-M (where M is Fe, V or Co) alloy which consists of 55.0 to 55.9 wt.% of (Ni+M) and the balance Ti and in which M content is properly selected. After this material is worked into a desired parts shape, annealing is applied to make shape memory characteristics disappear. Then cold working is applied only to a specific part (the temple part, in the case of the spectacle frames) and finally shape memory treatment is applied. By this method, a product in which a cold-worked part alone exhibits superelasticity and the other part can be subjected to plastic working can be obtained.
Inventors:
Morii Koichi
Yoshitaka Morita
Takazumi Shimizu
Yoshitaka Morita
Takazumi Shimizu
Application Number:
JP2002047336A
Publication Date:
May 16, 2007
Filing Date:
February 25, 2002
Export Citation:
Assignee:
Daido Steel Co., Ltd.
International Classes:
C22F1/10; G02C5/16; C22C19/03; C22F1/00; (IPC1-7): C22F1/10; C22C19/03; G02C5/16; //C22F1/00
Domestic Patent References:
| JP9228012A | ||||
| JP58186719A |
Attorney, Agent or Firm:
Sooo Suga