Production process and material of threaded drill rods for underground mining

Date: 2024-05-07     Source: SDK      Author: admin

The production process and materials of threaded drill rods for underground mining mainly involve the following aspects:

Production process:

Raw material preparation: Cut the raw materials into appropriate lengths of drill rods and perform preliminary processing, such as drilling holes, threading, etc.
Heat treatment: Heat treatment is applied to drill pipes to adjust their mechanical properties, such as hardness and toughness.
Coating treatment: Coating the surface of drill pipes to improve their wear resistance and corrosion resistance. Common coating materials include hard alloys, tungsten carbide, etc.
Connection method: Process and assemble according to the connection method of the drill pipe (such as cold installation, hot installation, friction welding, etc.). For example, cold assembly process refers to the pre processing of inner square holes at both ends of the rod body, and then threading square steel into the pre processed inner square holes at one end for drilling, welding, and fixing pin holes; The hot fitting process involves heating the rod body, installing the square steel on the fixture, directly pressing the square steel inside the rod body, and then drilling pin holes to press the pins and welding them.

Material:

Carbon steel drill pipe: Carbon steel drill pipe is the most common drill pipe material in mining, mainly composed of carbon and iron alloys, with good machinability and structural strength, and relatively low cost. However, carbon steel drill pipes are prone to rust, corrosion, and wear in humid environments, and have a relatively short service life.
Alloy steel drill rods: Alloy steel drill rods are composed of steel and alloy elements (such as chromium, molybdenum, etc.), which have extremely high corrosion resistance, wear resistance, and strength, especially suitable for use in acidic or high-temperature mining environments. It has a longer service life, but its cost is also relatively high.
It should be noted that different mining conditions and operational requirements may require different drilling rod production processes and materials. Therefore, when selecting drill pipes, it is necessary to comprehensively consider the specific situation and choose the most suitable type and specification of drill pipes.