Methods for fabricating drill bits, including assembling a bit crown and a bit body material and integrally securing the bit crown and bit body material to one another

A method of fabricating a rotary-type earth-boring drill bit, comprising:

• fabricating a substantially hollow bit crown from a particulate material, comprising:
• defining peripheries in a plurality of layers of said particulate material, said plurality of layers corresponding to contiguous layers of a computer model of said substantially hollow bit crown;
• superimposing contiguous layers of said plurality of layers;
• introducing a bit body material into an interior of said substantially hollow bit crown following said fabricating, said bit body material forming at least a portion of a bit gage of said bit body, said bit gage extending to at least an exterior lateral extent of said bit crown and being exposed beyond said bit crown;
• and
• infiltrating at least said particulate material of said substantially hollow bit crown with an infiltrant material.

A method of fabricating a rotary-type earth-boring drill bit, comprising:

• fabricating a substantially hollow bit crown from a particulate material, comprising:
• defining peripheries in a plurality of layers of said particulate material, said plurality of layers corresponding to contiguous layers of a computer model of said substantially hollow bit crown;
• superimposing contiguous layers of said plurality of layers;
• assembling said substantially hollow bit crown with a bit gage mold including a cavity configured to communicate with an interior of said substantially hollow bit crown;
• introducing a bit body material into an interior of said substantially hollow bit crown;
• and
• infiltrating at least said particulate material of said substantially hollow bit crown with an infiltrant material.