IMPACT RESISTANT HARDFACING AND ALLOYS AND METHODS FOR MAKING THE SAME

摘要

Disclosed herein are embodiments of alloys which can be used for hardfacing applications, and hardfacing layers themselves. In particular, embodiments of the alloys can have high hardness as well as impact resistance. These advantageous properties can occur due to the inclusion of hardfacing particles, as well as other compositional, microstructural, thermodynamic, and performance criteria.

主权项

1. An iron-based hardfacing layer formed from an alloy comprising boron, carbon, and at least one other element configured to form borides and/or carbides, the hardfacing layer comprising:
greater than 2 mole and volume % of extremely hard boride/carbide particles having a Knoop hardness of 1500 or greater; an ASTM G65 abrasion loss of less than 0.5 grams; a macro-hardness of 55 HRC or greater; wherein a difference between a formation temperature of the extremely hard boride/carbide particles and a formation temperature of an iron matrix phase of the alloy is 200K or lower.