WELD METAL WITH EXCELLENT CREEP CHARACTERISTICS

Title:

WELD METAL WITH EXCELLENT CREEP CHARACTERISTICS

Document Type and Number:

WIPO Patent Application WO/2012/108517

Kind Code:

A1

Abstract:

This weld metal has excellent creep characteristics and has a given chemical composition. In the weld metal, the value A defined by equation (1) is 200 or greater, and carbide grains each having an equivalent-circle diameter of 0.40 µm or more have an average equivalent-circle diameter less than 0.85 m. In the segments that connect the centers of three or more carbide grains which are present on a 6-µm straight line and which each has an equivalent-circle diameter of 0.4 µm or more, the sum of the lengths of the portions where the segments intersect the carbide grains is 25% or more of the overall length of the segments. Value A = ([V]/51+[Nb]/93)/{[V]×([Cr]/5+[Mo]/2)}×104 (1) In the equation, [V], [Nb], [Cr], and [Mo] respectively indicate the contents (mass%) of V, Nb, Cr, and Mo in the weld metal.

Inventors:

NAKO HIDENORI
YAMASHITA KEN
OTSU MINORU
SAKATA MIKIHIRO
TANIGUCHI GENICHI

Application Number:

PCT/JP2012/053016

Publication Date:

August 16, 2012

Filing Date:

February 09, 2012

Export Citation:

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Assignee:

KOBE STEEL LTD (JP)
NAKO HIDENORI
YAMASHITA KEN
OTSU MINORU
SAKATA MIKIHIRO
TANIGUCHI GENICHI

International Classes:

B23K35/30; B23K9/23; C22C38/00; C22C38/50; B23K9/00; B23K35/362; B23K35/365; B23K103/04

Foreign References:

JPH06328292A	1994-11-29
JPH08150478A	1996-06-11
JP2004230410A	2004-08-19
JP2002018593A	2002-01-22
JPH07290275A	1995-11-07

Other References: