METHOD FOR PRODUCING HOT-FORGED MATERIAL

Title:

METHOD FOR PRODUCING HOT-FORGED MATERIAL

Document Type and Number:

WIPO Patent Application WO/2018/117226

Kind Code:

A1

Abstract:

[Problem] To provide a method for producing a hot-forged material in an atmosphere using, for the die, an Ni-base superalloy which is advantageous in terms of the service life of the die, and also using, as a lubricant, a glass lubricant which undergoes substantially no chemical reactions that would promote oxidative corrosion. [Solution] A method for producing a hot-forged material in which a hot forging raw material having a surface partially or entirely covered with a glass lubricant is placed in a lower die, and the hot forging raw material is pressed with the lower die and an upper die and thereby made into a hot-forged material, wherein the lower die and/or the upper die is/are made of an Ni-base superalloy, and the surfaces of the mold that come into contact with the hot forging raw material are coated with a glass lubricant composed primarily of SiO2, the total content of alkali metal oxides being 0 to 10.0% by mass.

Inventors:

SUZUKI SHOGO (JP)
UENO TOMONORI (JP)

Application Number:

PCT/JP2017/045961

Publication Date:

June 28, 2018

Filing Date:

December 21, 2017

Export Citation:

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Assignee:

HITACHI METALS LTD (JP)

International Classes:

B21J3/00; B21J13/02; C10M125/10; C10M169/04; C22C19/05; C10M103/00; C10M103/06; C10N10/02; C10N30/10; C10N30/12; C10N40/24

Domestic Patent References:

WO2016052523A1

2016-04-07

Foreign References:

JP2016069703A	2016-05-09
JPH1192169A	1999-04-06
JPS62116748A	1987-05-28
JPS6250429A	1987-03-05
JPS6321737B2	1988-05-09
US4740354A	1988-04-26
JPH06254648A	1994-09-13

Other References: