- Meaning of precision-drawn tube
Precision-drawn tube is a kind of steel tube made by stretching and finishing, with high precision and high finish. Its diameter and wall thickness, concentricity can be accurately controlled, surface roughness of Ra0.2 or less, is a high standard, high quality steel tube products.
- the use of precision drawn tube
Precision drawn tube is widely used in various fields. In machinery manufacturing, fine-drawing tube is used as the support and sealing of hydraulic system, lubrication system, machine tool guides and other high-precision transmission parts. In the automotive industry, fine-drawing tube is used as fuel system, brake system, hydraulic system and other key components. In the petroleum, chemical, electric power and other industries, fine-drawn tubes are used as important parts of fluid transmission, pressure vessels, heat exchangers and so on.
- the production method of fine-drawn tube
The production method of precision drawn tube mainly includes the following steps:
1. Selection of high-quality raw materials: selection of high-quality billets as raw materials to ensure that the chemical composition is stable, dense internal organisation.
2. Heating: Heating the billet to a certain temperature, so that it has enough plasticity and deformation capacity.
3. precision stretching: carry out a number of stretching in the heating state, gradually reduce the diameter and wall thickness of the billet, and at the same time to ensure the internal and external quality of the steel pipe.
4. Cold Rolling: The stretched steel pipe will be stretched again in cold state to further reduce the diameter and wall thickness, and improve the length accuracy of the steel pipe.
5. heat treatment: heat treatment of steel tubes to improve their strength, hardness and stability.
6. finishing: surface finishing and cleaning of steel pipe to remove surface defects and impurities and improve the finish of steel pipe.
- the heat treatment method of precision drawn tube
Precision drawn tube heat treatment methods are mainly the following:
1. annealing treatment: through the annealing treatment to eliminate residual stress within the steel pipe, improve its organisation and properties, improve the plasticity and toughness of the steel pipe.
2. tempering treatment: through the tempering treatment so that the steel pipe to obtain the appropriate strength and toughness, to improve its overall mechanical properties and service life.
3 solid solution treatment: through solid solution treatment to make the alloying elements in the steel pipe to achieve the ideal dissolution state, improve the hardness, strength and wear resistance of the material.
