BONDED COMPONENT - MITSUBISHI HEAVY IND LTD

Title:

BONDED COMPONENT

Document Type and Number:

WIPO Patent Application WO/2013/080828

Kind Code:

A1

Abstract:

An objective is to provide a bonded component, capable of inhibiting carbon and nitrogen contained in a steel member from diffusing into a TiAl-based alloy, preventing the occurrence of voids, titanium carbide, and nitride caused by the diffusion of carbon and nitrogen contained in the steel member, and preventing brazing strength from being lowered. The bonded component is formed by bonding a steel member containing alloying elements such as C and Cr, and a TiAl-based alloy member through Ni brazing, wherein the steel member is formed through the generation of carbide and nitride which are bonded to the alloying elements in at least an Ni brazing boundary, and the carbide and nitride can prevent C and N from diffusing into the Ni brazing side adjacent to the TiAl-based alloy member. The bonded component comprises a shaft (3), which is a part of a turbine body (1) composed of a turbine wheel (2) and said shaft (3), and the structural steel thereof is structural steel comprising 0.30-0.45 wt% of carbon and 0.85-1.25 wt% of Cr, or martensite stainless steel comprising 0.15 wt% or less of carbon and 11.5-13 wt% of Cr.

Inventors:

ARAI TAKASHI (JP)

Application Number:

PCT/JP2012/079974

Publication Date:

June 06, 2013

Filing Date:

November 19, 2012

Export Citation:

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Assignee:

MITSUBISHI HEAVY IND LTD (JP)

International Classes:

B23K1/19; B23K1/00; C22C38/00; C22C38/18; C22C38/38; F01D5/04; F01D5/28; F01D25/00; F02B39/00; F02C7/00; B23K103/24; C22C14/00

Foreign References:

JP2010005643A	2010-01-14
JPH108924A	1998-01-13
JP2004090130A	2004-03-25

Other References: