CORROSION RESISTANT HARDFACING ALLOY

摘要

Disclosed herein are embodiments of iron-based corrosion resistant hardfacing alloys. The alloys can be designed through the use of different compositional, thermodynamic, microstructural, and performance criteria. In some embodiments, chromium content in the alloy can be increased while avoiding the formation of different hard chromium carbides, thereby increasing the corrosion resistance of the alloy.

主权项

1. A work piece having at least a portion of its surface covered by a layer comprising a microstructure comprising:
an Fe-based matrix comprising ferrite, austenite, martensite or a combination thereof, whereby the matrix contains a minimum of 8 wt. % chromium; primary hard phases defined as carbides or borides which form 1-20 micron spherical particles at a volume fraction of at least 5%; and a matrix microhardness of at least 300 Vickers; wherein the matrix contains less than 10% mole fraction of iron or chromium containing carbide or borocarbide particles in excess of 5 microns in size.