Invention Grant
- Patent Title: Earth-boring bits and other parts including cemented carbide
- Patent Title (中): 地镗头等部件包括硬质合金
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Application No.: US13491649Application Date: 2012-06-08
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Publication No.: US08858870B2Publication Date: 2014-10-14
- Inventor: Prakash K. Mirchandani , Morris E. Chandler , Michale E. Waller , Heath C. Coleman
- Applicant: Prakash K. Mirchandani , Morris E. Chandler , Michale E. Waller , Heath C. Coleman
- Applicant Address: US PA Latrobe
- Assignee: Kennametal Inc.
- Current Assignee: Kennametal Inc.
- Current Assignee Address: US PA Latrobe
- Agent Matthew W. Gordon, Esq.
- Main IPC: B22F3/15
- IPC: B22F3/15 ; E21B10/42 ; B22F3/26 ; C22C29/08 ; B22F3/10 ; B22F5/00

Abstract:
A method of making an article of manufacture includes positioning a cemented carbide piece comprising at least 5% of the total volume of the article of manufacture, and, optionally, a non-cemented carbide piece in a void of a mold in predetermined positions to partially fill the void and define an unoccupied space. Inorganic particles are added to the mold to partially fill the unoccupied space and provide a remainder space. The cemented carbide piece, the non-cemented carbide piece if present, and the hard particles are heated and infiltrated with a molten metal or a metal alloy. The melting temperature of the molten metal or the metal alloy is less than the melting temperature of the inorganic particles. The molten metal or metal alloy in the remainder space solidifies and binds the cemented carbide piece, the non-cemented carbide piece if present, and the inorganic particles to form the article of manufacture.
Public/Granted literature
- US20120240476A1 EARTH-BORING BITS AND OTHER PARTS INCLUDING CEMENTED CARBIDE Public/Granted day:2012-09-27
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