oil tubing and casing pipe can improve toughness by heat treatment

Besides used in oil drilling, oil tubing and casing pipe can be also used as pipes of transport material. In order to strengthen the quality of the tubing and casing pipe, it is particular important for every link in the process of production, especially the temperature control during the period. The temperature control must be in strict in accordance with the regulations. Usually, oil casing pipe adopts the temperature quenching method, rather than ordinary quenching method, because ordinary quenching way will make a large number of residual stress within workpiece. Thereby, it is easy to expand the brittleness and it is not so convenient in subsequent processing. While temperature quenching is to prevent excessive tubing and casing pipe brittle influence subsequent technological process.

Main operating ways: first, choose the heating temperature of quenching usually between 740-810℃, the heating time is usually about 15 minutes. After quenching then tempering, the heating time of tempering is 50 minutes, the temperature chooses 630 ℃, certainly, and each steel material has its own heating temperature and time during the heat treatment. As long as it can enhance and improve the performance of the workpiece, the purpose of heat treatment can also reach.

Heat treatment is the most important process in the manufacturing process for oil tubing and casing pipe. The performance of finished product and quality is whether up to the standard most depending on the result of the heat treatment. So oil tubing and casing pipe manufacturer is very strict for heat treatment process without s snub. Sometimes, adopt the way of low temperature quenching. The low temperature quenching can remove the residual stress of oil casing pipe and oil tubing pipe effectively. This can not only reduce the degree of quenching deformation of the workpiece, but also make tubing and casing pipe process into more suitable for raw material of late process. By heat treatment, whether oil casing and tubing pipe impact toughness and anti-damage resistance and tensile strength has the great enhancement.