Wear-resistant, corrosion-resistant cobalt-based alloys

Details Wear-resistant, corrosion-resistant cobalt-based alloys Wear-resistant, corrosion-resistant cobalt-based alloys

2005-02-08

2005-02-08

Sheehan, John P (Department: 1742)

Metal treatment

Stock

Cobalt base

C148S442000, C420S436000, C420S437000, C420S438000, C420S439000, C420S440000, C420S588000

Reexamination Certificate

active

06852176

ABSTRACT:
A Co-based alloy comprising 13-16 wt % Cr, 20-30 wt % Mo, 2.2-3.2 wt % Si, and balance Co, with a Cr:Si ratio of between about 4.5 and about 7.5, a Mo:Si ratio of between about 9 and about 15, wear resistance, and corrosion resistance in both oxidizing and reducing acids.

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ASTM Designation: G 31-72, Standard Practice for Laboratory Immersion Corrosion Testing of Metals, 1972.
ASTM Designation: G133-95, Standard Test Method for Linearly Reciprocating Ball-on-Flat Sliding Wear, 1995.
ASTM Designation: E23-96, Standard Test Methods for Notched Bar Impact Testing of Metallic Materials, 1996.
Schmidt, R. D. and Ferriss, D.P., “New Materials Resistant To Wear and Corrosion To 1000° C.”, Wear, 1975, pp. 279-289, vol. 32, No. 3, Elsevier Sequoia S.A., Lausanne.
Raghu, Damodaran, and Wu, James B. C., “Recent Developments in Wear- and Corrosion-Resistant Alloys for the Oil Industry”, Materials Performance, 1997, pp. 27-36, vol. 36, No. 11.

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