Title:
METHOD FOR PRODUCING HOT-FORGING MATERIAL
Document Type and Number:
WIPO Patent Application WO/2019/065543
Kind Code:
A1
Abstract:
Provided is a method for producing a hot-forging material by which it is possible to prevent the occurrence of double-barreling forging defects. A method for producing a hot-forging material, the method including a hot-forging step in which a hot-forging raw material is pressed by a lower mold and an upper mold in air to form a hot-forging material, both of the upper mold and the lower mold comprising an Ni-based super-heat-resistant alloy, wherein: the method for producing a hot-forging material includes a raw-material heating step in which the hot-forging raw material is heated to a heating temperature within the range of 1025-1150°C inside a heating furnace, a metal mold heating step in which the upper mold and the lower mold are heated to a heating temperature within the range of 950-1075°C, and a transportation step in which the hot-forging raw material is transported from the heating furnace to the lower mold by a manipulator; and the value obtained by subtracting the heating temperature of the upper mold and the lower mold from the heating temperature of the hot-forging raw material is at least 75°C.
Inventors:
SUZUKI SHOGO (JP)
UENO TOMONORI (JP)
KOBAYASHI SHINICHI (JP)
TAKAHASHI SHOICHI (JP)
MATSUI TAKANORI (JP)
UENO TOMONORI (JP)
KOBAYASHI SHINICHI (JP)
TAKAHASHI SHOICHI (JP)
MATSUI TAKANORI (JP)
Application Number:
PCT/JP2018/035215
Publication Date:
April 04, 2019
Filing Date:
September 21, 2018
Export Citation:
Assignee:
HITACHI METALS LTD (JP)
International Classes:
B21J13/02; B21J3/00; C22C19/05
Foreign References:
| JP2016529106A | 2016-09-23 | |||
| JP3227223B2 | 2001-11-12 | |||
| JP2016196026A | 2016-11-24 | |||
| JP2016068134A | 2016-05-09 | |||
| JPS61127832U | 1986-08-11 | |||
| JP6045434B2 | 2016-12-14 | |||
| JPS6250429A | 1987-03-05 | |||
| JPS6321737B2 | 1988-05-09 | |||
| US4740354A | 1988-04-26 | |||
| JPH03174938A | 1991-07-30 |
Other References:
TRANSACTIONS OF THE IRON AND STEEL INSTITUTE OF JAPAN, vol. 28, no. 11, 1988, pages 958 - 964
See also references of EP 3689493A4
See also references of EP 3689493A4
Download PDF: