Hardfacing composition for rock bits

A hardfacing composition for a drill bit, comprising:

• a carbide phase comprising
• from about 80% to about 95% by weight of a combination of sintered carbide pellets and crushed cast carbide, and
• from about 5% to about 20% by weight of macro-crystalline tungsten carbide;
• and
• a binder alloy.

A roller cone drill bit, comprising:

• a bit body;
• and
• at least one roller cone rotatably mounted to the bit body, the at least one roller cone comprising at least one cutting element, the at least one cutting element having on an exterior surface thereof a hardfacing, the hardfacing being formed with a hardfacing composition comprising
• a carbide phase comprising
• from about 80% to less than 100% by weight of a combination of sintered carbide pellets and crushed cast carbide, and
• from more than 0% to about 20% by weight of carburized tungsten carbide;
• and
• a binder alloy.

A roller cone drill bit, comprising:

• a bit body;
• and
• at least one roller cone rotatably mounted to the bit body, the at least one roller cone comprising at least one cutting element, the at least one cutting element having on an exterior surface thereof a hardfacing, the hardfacing being formed with a hardfacing composition comprising
• a carbide phase comprising
• from about 80% to about 95% by weight of a combination of sintered carbide pellets and crushed cast carbide, and
• from about 5% to about 20% by weight of macro-crystalline tungsten carbide;
• and
• a binder alloy.