CRACK RESISTANT HARDFACING ALLOYS

摘要

Embodiments of an alloy that can be resistant to cracking. In some embodiments, the alloy can be advantageous for use as a hardfacing alloys, in both a diluted and undiluted state. Certain microstructural, thermodynamic, and performance criteria can be met by embodiments of the alloys that may make them advantageous for hardfacing.

主权项

1. A metal alloy composition, comprising:
an Fe-based alloy comprising alloying elements of:
boron;carbon;chromium; andniobium, titanium and/or vanadium; wherein the maximum eutectic carbide/boride phase fraction of the alloy is about 15 mole %; wherein the maximum grain boundary formation temperature gap of the alloy is about 80K; wherein the minimum carbon level in the liquid is about 0.5 wt. %; and wherein the alloy comprises both carbides and borides, and the carbides are thermodynamically stable at a temperature equal to or greater than about 80K below the liquid temperature of the austenite or ferrite matrix phase.