Alloy-coated boiler part and method of welding self-fluxing...

Details Alloy-coated boiler part and method of welding self-fluxing... Alloy-coated boiler part and method of welding self-fluxing...

2005-03-24

2010-10-05

McNeil, Jennifer C (Department: 1784)

Stock material or miscellaneous articles

All metal or with adjacent metals

Laterally noncoextensive components

C428S679000, C428S680000, C428S683000

Reexamination Certificate

active

07807273

ABSTRACT:
An alloy-coated boiler part is furnished with a melted coating of alloy material excellent in erosion/corrosion resistance when joined by welding, and free from thermal shock cracking. Super alloy coating (15) is applied over rapid temperature rise region width (C), where thermal shock cracking may occur at a welding operation, at end portions subjected to weld joint including the vicinity. Self-fluxing alloy coating (16) is applied on remaining regions other than the rapid temperature rise region width (C). While over a half proportion of each of the alloy coatings (15, 16) occupied by an Ni-enriched Ni—Cr component, the super alloy coating (15) has the contents of B and Si suppressed to equal or less than 0.1% and equal or less than0.5%, respectively, and in the self-fluxing alloy coating (16), the content of each of B and Si is in the range of 1 to 5%.

REFERENCES:
patent: 2875043 (1959-02-01), Tour
patent: 6055943 (2000-05-01), Cochrane et al.
patent: 07060481 (1995-03-01), None
patent: 9-256100 (1997-09-01), None
patent: 10-30140 (1998-02-01), None
English Machine Translation of JP07-060481—Printed Nov. 2, 2009.
International Search Report of PCT/JP2005-005387 date of mailing Jun. 28, 2005.

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