Heat-resisting and wear-resisting alloy steel material for drill bits and preparation method thereof

Abstract

The invention relates to a heat-resisting and wear-resisting alloy steel material for drill bits. The alloy steel material comprises the following chemical element constituents by mass percent: 2.0 to 2.3 percent of carbon, 9.6 to 9.9 percent of chromium, 1.4 to 1.6 percent of tungsten, 2.0 to 2.3 percent of molybdenum, 6.5 to 6.7 percent of cobalt, 1.2 to 1.3 percent of manganese, 0.4 to 0.6 percent of titanium, 1.1 to 1.3 percent of Be, 0.03 to 0.05 percent of La, 0.16 to 0.19 percent of Ho, and the balance of iron and other inevitable impurities. The cobalt, the tungsten and the molybdenum are added to alloy steel for the drill bits, provided by the invention, so that hardness and red hardness are increased; through adding the La, the Ho, the Be and the titanium, the hardness and the wear resistance of alloy are increased, at the same time, favorable toughness is kept, and the alloy steel material has favorable corrosion resistance. The alloy steel material is used for manufacturing deep hole drills, long drill bits and the like, the alloy steel material is not easy to break, the service life of the alloy steel material is long, and the cost of the alloy steel material is lower than that of high-speed steel.

Description

technical field [0001] The invention relates to the field of alloy materials, in particular to a heat-resistant and wear-resistant alloy steel material for a drill bit and a preparation method thereof. Background technique [0002] Electric drill is a widely used electric tool, which is widely used in construction, processing and other fields. The main principle of the electric drill is to drive the operating device through the rotation of the motor, so that the drill bit scrapes the surface of the object to penetrate the object. The drill bit is one of the essential components of the electric drill. [0003] At present, the drill materials are mainly high-speed steel and cemented carbide. These two alloys have high hardness, wear resistance, good red hardness, and maintain a certain degree of toughness. However, during the use of electric drills, they often break, and the blades are easy to wear or bend. It needs to be replaced frequently, mainly because the hardness, wear...

AI Technical Summary

Problems solved by technology

[0003] At present, the drill materials are mainly high-speed steel and cemented carbide. These two alloys have high hardness, wear resistance, good red hardness, and maintain a certain degree of toughness. However, during the use of electric drills, they often break, and the blades are easy to wear or bend. It needs to be replaced frequently, mainly because the hardness, wear resistance, toughness and other properties of the drill bit material cannot be balanced