The heat treatment process determines the quality of the drill rod
In order to meet the needs of mine production and engineering construction, domestic hydraulic rock drilling machinery has been introduced. Heavy-duty hydraulic drilling rigs have been used in mines, It has been widely used in water conservancy, tunnels, highways, railways and other rock drilling operations, and the domestic heavy-duty drill market has further expanded.
In the whole drilling process, in addition to the raw material factors, the heat treatment process is the most important factor in determining the quality of the drill rod. The thread failure of the drill rod is mainly due to dynamic wear and impact wear, which leads to the failure of the drill rod. Existence, it directly affects product quality, and is related to the credibility and survival of the company. Wear, corrosion and fracture are the three main forms of drill rod failure. Among them, wear failure caused by friction is the main reason for the failure of drill rods. About 70%-80% of drill rods are damaged. Caused by various forms of wear. The selection of the heat treatment process of the drill rod is based on the steel for the steel type drill tool. With the development of impact rock drilling machinery, various series and categories have been formed. In the production of drill rods, the correct choice of steel type is possible to select a heat treatment process that can fully utilize the advantages of the steel type to ensure the quality and life of the drill rod. Different steel grades have different better heat treatment processes.
The selection of the heat treatment process of the drill rod should follow the principles of economy, rationality and feasibility. The current development of heat treatment technology is changing with each passing day. In addition to conventional heat treatment, induction heating, chemical heat treatment, and vacuum heat treatment, there are also high-energy beams (laser, electron beam, etc.) ) Heat treatment, physical vapor deposition and chemical vapor deposition, ion implantation, spraying and other new surface strengthening heat treatment technologies. The drill rod is a long and slender rod, and the overall treatment has great limitations. Often a heat treatment 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 basic requirements of drill rods among the many heat treatment technologies, it is necessary to consider economy, rationality and feasibility.
