Title:
CORROSION-RESISTANT HIGH-HARDNESS ALLOY COMPOSITION AND PROCESS FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2016/020985
Kind Code:
A1
Abstract:
An alloy composition which contains 15.5-16.5 wt% Cr, 7.5-15.5 wt% Mo, 0-30 wt% Co, 4.5-15 wt% Fe, and 0.5-4.0 wt% Cu, with the remainder comprising Ni and unavoidably included elements, and in which the crystal phase consists only of a γ phase and the Vickers hardness at room temperature is 500 HV or greater. Thus, an Ni-Co-Cr-Mo alloy that combines corrosion resistance with wear resistance is obtained. The Ni-Co-Cr-Mo alloy is obtained by subjecting an ingot of an alloy having the makeup to a homogenization treatment at 1,100-1,300°C for 4-24 hours, subsequently to cold working at a degree of reduction of 30-60%, and then to an aging treatment for 0.5-3 hours in the temperature range of 300-600°C.
Inventors:
LI YUNPING (JP)
CHIBA AKIHIKO (JP)
CHIBA AKIHIKO (JP)
Application Number:
PCT/JP2014/070621
Publication Date:
February 11, 2016
Filing Date:
August 05, 2014
Export Citation:
Assignee:
UNIV TOHOKU (JP)
EIWA CORP (JP)
EIWA CORP (JP)
International Classes:
C22C19/05; C22F1/10; C22F1/00
Domestic Patent References:
| WO2006003954A1 | 2006-01-12 |
Foreign References:
| JPS62260033A | 1987-11-12 | |||
| JPS57210941A | 1982-12-24 | |||
| JP2010001558A | 2010-01-07 |
Other References:
YUNPING LI ET AL.: "Effects of partially substituting cobalt for nickel on the corrosion resistance of a Ni-16Cr-15Mo alloy to aqueous hydrofluoric acid", CORROSION SCIENCE, vol. 78, January 2014 (2014-01-01), pages 101 - 110, XP028778321
Attorney, Agent or Firm:
SUDA Atsushi et al. (JP)
Atsushi Suda (JP)
Atsushi Suda (JP)
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