Method for making rock bits

Details Method for making rock bits Method for making rock bits

E - Fixed Constructions

21

B

76/21, 255/74

E21B 10/50 (2006.01)

Patent

CA 1121331

Abstract of the Disclosure Segments of a rock bit are secured together by electron- beam welding. The segments are slightly spaced apart prior to welding by a thin shim of alloying metal such as titanium which improves ductility of the weld and is a strong carbide- former during welding. The shim is positioned between adjacent segments in the region of the crown or dome of the bit. The resulting welded interface is a fine-grain stress-relieved structure with good ductility and resistance to cracking.

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