Introduction to the principles of heat treatment process selection for H22 drill rods, come and collect them!

Introduction to the principles of heat treatment process selection for H22 drill rods, come and collect them!

H22 drill rods are tools that connect drill bits and rock drills in tunnel engineering. H22 drill rods used in mine tunnel engineering are generally hexagonal hollow steel and hollow round steel. The inscribed circle diameter of hexagonal hollow steel is 22mm and 25mm, and the outer diameter of hollow round steel is 32mm and 38mm. Steel drill rods are finished steel and forged steel. Finished drill rods are forged to a certain length, and then the drill bit is directly installed to drill holes. Forged steel is to cut the hollow hexagonal steel according to needs, and then use a forging press to forge the drill tail and drill bit, and then install the drill bit to drill holes. H22 drill rod is a tool for connecting the drill bit and rock drilling in tunnel engineering. The H22 drill rod used in mine tunnel engineering is generally hexagonal hollow steel and hollow round steel. The inscribed circle diameter of hexagonal hollow steel is 22mm and 25mm, and the outer diameter of hollow round steel is 32mm and 38mm. The finished drill is forged according to a certain length, and then the drill bit is directly installed to drill holes. Forged steel is to cut the hollow hexagonal steel according to needs, and then use a forging press to forge the drill tail and drill bit, and then install the drill bit to drill holes.

What is the principle of selecting the heat treatment process for H22 drill rod?

Let's analyze it together.

1. The selection of H22 drill rod process is based on the steel used for drilling tools.

With the development of impact rock drilling machinery, various series and types have been formed. In the production of H22 drill rods, by correctly selecting the steel type, you can choose a heat treatment process that can give full play to the advantages of the steel type, thereby ensuring the quality and life of the drill rod. Different steel types have different processes.
2. The selection of H22 drill rod process is based on the basic requirements of drill rods and failure analysis of drill rods.
The basic requirements of drill rods vary from variety to variety. The reasons for failure of drill rods include unreasonable structural design of drill rods, defects in various processing procedures during the manufacturing of drill rods, and mistakes in use. However, whether the process is suitable and whether there are quality problems in the process are inherent and essential. According to the main reasons for the failure of drill rods, after excluding various external factors, the heat treatment process is selected to ensure internal quality.
3. The selection of H22 drill rod process should follow the principles of economy, rationality and feasibility.
At present, the development of heat treatment technology is changing with each passing day. In addition to conventional heat treatment, induction heating, chemical and vacuum heat treatment, there are also new surface strengthening technologies, such as high-energy beam (laser, electron beam, etc.) heat treatment, physical vapor deposition, chemical vapor deposition, ion implantation and spraying. The drill rod is a slender rod, and the overall treatment has great limitations. Often one process cannot meet the basic requirements of each part of the drill rod. Several heat treatment processes should be selected to treat each part separately. How to choose a heat treatment process suitable for the various basic requirements of H22 drill rods among many processes should consider economy, rationality and feasibility.
4 The standard for selecting the process is to increase the actual service life of H22 drill rods.
So far, the quality of H22 drill rods is judged by on-site mine drilling tests. Prior to this, many companies, research institutes and universities at home and abroad have developed indoor life test benches and life test devices for drill rods. Tests or test results can only be relative or used as a preliminary screening method for brazing or heat treatment processes. It should be pointed out that field mine drilling test data are often relative. Only at the same location, with the same machinery and at the same operating level, can the data after statistical processing be reliably compared. The long life results of mine drilling tests are an important basis for selecting heat treatment processes.