Title:
HOT-DIE NI-BASED ALLOY, HOT-FORGING DIE EMPLOYING SAME, AND FORGED-PRODUCT MANUFACTURING METHOD
Document Type and Number:
WIPO Patent Application WO/2019/107502
Kind Code:
A1
Abstract:
Provided are: a hot-die Ni-based alloy that possesses high high-temperature compressive strength and good oxidation resistance and that is capable of suppressing deterioration of the work environment and deterioration of the shape; a hot-forging die employing the same; and a forged-product manufacturing method employing the hot-forging die. The present invention provides a hot-forging die in which 80% or a greater portion of a surface of a hot-die Ni-based alloy is covered with an aluminum oxide layer, the hot-die Ni-based alloy comprising, in terms of % by mass: 7.0-15.0% of W, 2.5-11.0% of Mo, 5.0-7.5% of Al, 0.5-7.5% of Cr, and the remnant being Ni and inevitable impurities, wherein, in addition to the aforementioned composition, it is possible to additionally contain Ta: 7.0% or less, and, additionally, one type or two or more types of elements selected from Zr: 0.5% or less, Hf: 0.5% or less, rare-earth elements: 0.2% or less, Y: 0.2% or less, and Mg: 0.03% or less.
Inventors:
SUZUKI SHOGO (JP)
AOKI CYUYA (JP)
UENO TOMONORI (JP)
AOKI CYUYA (JP)
UENO TOMONORI (JP)
Application Number:
PCT/JP2018/044012
Publication Date:
June 06, 2019
Filing Date:
November 29, 2018
Export Citation:
Assignee:
HITACHI METALS LTD (JP)
International Classes:
C22C19/05; B21J13/02; C22F1/10; C22F1/00
Domestic Patent References:
| WO2017204286A1 | 2017-11-30 | |||
| WO2018117226A1 | 2018-06-28 |
Foreign References:
| JP2016069703A | 2016-05-09 | |||
| JP2016069702A | 2016-05-09 | |||
| CN1718803A | 2006-01-11 | |||
| JPS5016613A | 1975-02-21 | |||
| JPS6250429A | 1987-03-05 | |||
| JPS60221542A | 1985-11-06 | |||
| JP2016069702A | 2016-05-09 | |||
| JP2016069703A | 2016-05-09 | |||
| US4740354A | 1988-04-26 |
Other References:
See also references of EP 3719153A4
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