EARTH BORING DRILL BIT WITH MATRIX DISPLACING MATERIAL

摘要

EARTH BORING DRILL BIT WITH MATRIX DISPLACING MATERIAL A rotary drill bit for drilling earth formations is provided and includes a bit shank, a hard metal matrix secured to a blank and cutting elements on the exterior face thereof. The matrix includes a displacement material having a different composition than the matrix material within the matrix. The displacement material is preferably less expensive than the matrix material and also has different material properties. The resulting bit nay be custom-engineered for toughness, ductility, and impact resistance.