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Title:
CHROMIUM-NICKEL-BASED ALLOY FOR RADIANT TUBE, HAVING EXCELLENT HIGH-TEMPERATURE DEFORMATION RESISTANCE AND CRACK RESISTANCE, AND MANUFACTURING METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2019/112234
Kind Code:
A1
Abstract:
The present invention relates to a Cr-Ni-based alloy for a radiant tube, having excellent resistance to high-temperature deformation and cracks, and a manufacturing method therefor. One embodiment of the present invention provides: a Cr-Ni-based alloy for a radiant tube, having excellent high-temperature deformation resistance and crack resistance, the Cr-Ni-based alloy comprising, by wt%, 0.17-0.3% of carbon (C), 30-35% of chromium (Cr), 45-55% of nickel (Ni), 1% or less of manganese (Mn), 1% or less of silicon (Si), 1-3% of one of niobium (Nb) and vanadium (V) or the sum of the both, 5-18% of tungsten (W), 0.1-1.5% of tantalum (Ta), 0.1-1.5% of hafnium (Hf), 0.001-0.02% of boron (B), 0.05-1.5% of yttrium (Y) and the balance of Fe and other inevitable impurities, and having an average interval between solidified dendrites of 30 μm or less; and a manufacturing method therefor.

Inventors:
PARK JAI-HYUN (KR)
YANG MYUNG-MO (KR)
Application Number:
PCT/KR2018/014833
Publication Date:
June 13, 2019
Filing Date:
November 28, 2018
Export Citation:
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Assignee:
POSCO (KR)
RES INST IND SCIENCE & TECH (KR)
International Classes:
C22C19/05; C22B1/02; C22C30/00
Foreign References:
KR20050009232A2005-01-24
KR101018211B12011-02-28
KR20150071055A2015-06-26
KR20110079881A2011-07-11
KR20050092452A2005-09-21
JP2015137420A2015-07-30
Attorney, Agent or Firm:
C&S PATENT AND LAW OFFICE (KR)
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