METHOD FOR MANUFACTURING Ni-BASED SUPER-HEAT-RESISTANT ALLOY

Title:

METHOD FOR MANUFACTURING Ni-BASED SUPER-HEAT-RESISTANT ALLOY

Document Type and Number:

WIPO Patent Application WO/2016/129485

Kind Code:

A1

Abstract:

The invention of the present application facilitates hot working of a steel γ'-containing Ni-based super-heat-resistant alloy by a method for manufacturing a Ni-based super-heat-resistant alloy that comprises: a first cold working step for cold working a Ni-based super-heat-resistant alloy ingot, which has a composition in which the γ' mole ratio is at least 40%, at a working ratio of 5% to less than 30%; and a first heat treatment step for heat-treating the cold worked material, on which the first cold working was performed, at a temperature exceeding the γ' solid solution temperature. It is preferable that the manufacturing method also comprises a second cold working step for performing, after the first heat treatment step, a second cold working on the heat-treated material at a working ratio of at least 20%, and a second heat treatment step for heat-treating the second cold worked material, on which the second cold working has been performed, at less than the γ' solvus temperature.

Inventors:

HAN GANG (JP)
SATO KOJI (JP)
UENO TOMONORI (JP)
CHIBA AKIHIKO (JP)

Application Number:

PCT/JP2016/053243

Publication Date:

August 18, 2016

Filing Date:

February 03, 2016

Export Citation:

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Assignee:

HITACHI METALS LTD (JP)
UNIV TOHOKU (JP)

International Classes:

C22F1/10; C22C19/05; C22F1/00

Domestic Patent References:

WO2015008343A1

2015-01-22

Foreign References:

JP2001512785A	2001-08-28
JP2015059239A	2015-03-30

Other References: