The raw materials used in the production of seamless steel pipes are mainly continuous cast round pipe billets and rolled round steel. Ensuring the quality of steel billets is the first step to ensure the quality of steel pipes. It mainly includes steelmaking level, pouring and cooling processes, and forming quality.

The first is to improve the level of steelmaking. It is necessary to reduce harmful elements and gases, improve the uniformity and purity of the composition, reduce non-metallic inclusions, and change their distribution patterns at the same time. When the composition of the steel billet is uneven and severe segregation occurs, the rolled steel pipe will show a serious band structure, thereby reducing the mechanical properties and corrosion properties of the steel pipe, or even unqualified. The non-metallic inclusions are pressed into thin sheets, which will not only affect the performance of the steel pipe but also may cause the steel pipe to crack during the production process.

Secondly, perfect the pouring and cooling process to reduce subcutaneous bubbles, subcutaneous cracks, porosity and shrinkage holes. It should not be ignored, because no matter what kind of defects, they may cause defects in the process of piercing and rolling, and some defects are in use. Post-amplification shortens the life of the product. In serious cases, the intermediate product is directly scrapped, such as inwardly folded.

In addition, the shape deviation of the billet, such as straightness, diameter and ovality, will directly affect the quality of the perforation and cause the quality of the waste pipe.

Huzhou Nanxun Yintuo Special Material Technology Co., Ltd. specializes in the production of austenitic stainless steel seamless pipe. If you need to buy seamless pipes, you can contact us at any time.