Title:
PRODUCTION METHOD FOR RING-ROLLED MATERIAL OF Fe-Ni-BASED SUPER-HEAT-RESISTANT ALLOY
Document Type and Number:
WIPO Patent Application WO/2020/059798
Kind Code:
A1
Abstract:
Provided is a production method for an Fe-Ni-based super-heat-resistant alloy ring-rolled material that is highly circular, suppresses AGG, and can suppress grain growth. A production method for a ring-rolled material of an Fe-Ni-based super-heat-resistant alloy that has an alloy 718 composition. As ring rolling steps for finishing a ring-shaped ring-rolled raw material that has the abovementioned composition, the production method comprises: a finishing ring rolling step in which the ring-rolled raw material is heated at 900°C–980°C and ring rolled; and an ellipticity correction step in which a ring expander that is configured from an expansion cone and an expansion die is used to expand the ring-rolled material that was rolled in the finishing ring rolling step and correct the ellipticity thereof. The ellipticity correction is performed without reheating the ring-rolled material that was rolled in the finishing ring rolling step or by heating at 960°C or below.
Inventors:
AOKI CHUYA (JP)
FUKUI TSUYOSHI (JP)
OHTOYO DAIGO (JP)
FUJITA ETSUO (JP)
IWASA NAOYUKI (JP)
HIROSAWA TAKU (JP)
FUKUI TSUYOSHI (JP)
OHTOYO DAIGO (JP)
FUJITA ETSUO (JP)
IWASA NAOYUKI (JP)
HIROSAWA TAKU (JP)
Application Number:
PCT/JP2019/036757
Publication Date:
March 26, 2020
Filing Date:
September 19, 2019
Export Citation:
Assignee:
HITACHI METALS LTD (JP)
International Classes:
C22F1/10; B21D3/14; B21H1/00; C22C19/05; C22F1/00
Foreign References:
| JP2011079043A | 2011-04-21 | |||
| KR20120017896A | 2012-02-29 | |||
| JP5994951B2 | 2016-09-21 |
Other References:
See also references of EP 3854902A4
Download PDF:
Previous Patent: PRODUCTION METHOD FOR RING-ROLLED MATERIAL OF Fe-Ni-BASED SUPER-HEAT-RESISTANT ALLOY
Next Patent: VEHICULAR LIGHT
Next Patent: VEHICULAR LIGHT