Title:
SUPERPLASTIC NI-CO-BASE ALLOY AND SUPERPLASTIC WORKING METHOD THEREFOR
Document Type and Number:
Japanese Patent JP3190566
Kind Code:
B2
Abstract:
PURPOSE: To facilitate the working of an Ni-Co-base alloy into a shape requiring large deformation or a complicated shape at low stress and also to make it possible to perform forming, conventionally performed by multistages, by a single stage.
CONSTITUTION: An Ni-Co-base alloy, having an alloy composition consisting of, by weight ratio, 31.4-33.4% Ni, 19.5-20.5% Cr, 9.5-10.5% Mo, 0.8-1.2% Nb, 0.3-0.7% Ti, 1.1-2.1% Fe, and the balance Co, is used. This alloy is subjected to solution heat treatment and then cold-worked at ≥30% draft, by which fine deformed twins are formed in a base phase. Then, plastic working is done at ≤10-3/S strain rate at a temp. in the region between 750 and 900°C and not lower than the recrystallization temp.
Inventors:
Yutaka Koyama
Isao Kuboki
Masaaki Takahashi
Osamu Takahashi
Isao Kuboki
Masaaki Takahashi
Osamu Takahashi
Application Number:
JP8582796A
Publication Date:
July 23, 2001
Filing Date:
March 14, 1996
Export Citation:
Assignee:
Seiko Instruments Inc.
International Classes:
C22F1/10; C22C19/00; C22C30/00; (IPC1-7): C22C19/00; C22C30/00; C22F1/10
Domestic Patent References:
| JP61243143A | ||||
| JP6033329A | ||||
| JP225537A | ||||
| JP57194237A |
Attorney, Agent or Firm:
Keinosuke Hayashi