Novel copper-based dip brazing alloy for drilling bit

Abstract

The invention discloses a novel copper-based dip brazing alloy used in drilling bit production. Cutting drill teeth and a drill body form a whole by dip brazing. The dip brazing copper alloy has excellent mechanical property and high strength, toughness and abrasion resistance. A brazing process is simple and convenient and suitable for brazing drill bits of multiple types. When the brazing temperature is between 900 and 1,000 DEG C, the alloy comprises the following chemical components in percentage by weight: 5 to 10 percent of Ni, 3 to 9 percent of Mn, 3 to 5 percent of Fe, 7 to 13 percent of Sn, 0.1 percent of sigma RE and the balance of Cu. When the brazing temperature is between 950 and 1,150 DEG C, the alloy comprises the following chemical components in percentage by weight: 8 to 15 percent of Ni, 10 to 13 percent of Mn, 5 to 10 percent of Zn, 1 to 2 percent of Fe, 0.05 to 0.1 percent of Ce and the balance of Cu. When the brazing temperature is between 1,100 and 1,250 DEG C, the alloy comprises the following chemical components in percentage by weight: 15 to 20 percent of Ni, 5 to 10 percent of Mn, 3 to 5 percent of Fe, 0.05 to 0.1 percent of sigma RE and the balance of Cu.

Description

technical field [0001] The invention belongs to brazing copper alloy material. Background technique [0002] An important component used in geological exploration or oil drilling is the drill bit. It directly affects the quality, cost and efficiency of drilling. Drill bits are generally machined from a drill body - alloy steel; and drill teeth - synthetic diamond or cemented carbide. The two become a complete drill bit by brazing. The brazing here is very different from ordinary brazing. The number of drill teeth to be welded is large, the shape of the drill body is complex, and the area is large. Therefore, the welding process is very complicated and generally takes more than 10-20 hours. [0003] For drill teeth, brazing is done with solder. And then different for the drill body, the solder that melts into liquid will be filled with the whole surface that accepts welding of the drill body. Dip into all voids that will accept welding. The drill body, although still so...

AI Technical Summary

Problems solved by technology

[0004] For a long time, the production of this type of drill bit has been highly specialized and its scope of application is relatively narrow. The research and development of its welding principle and process, especially welding, is far from sufficient

The welding process used by each drill bit production unit is different, and the type and chemical composition of the solder are more different, which seriously limits the development of production and the improvement of quality