Pipe billet impact on quality of seamless pipe

The pros and cons of pipe billet quality is the primary factor to judge the quality of seamless pipe. In order to guarantee the reasonable progress of perforation process and obtain high-quality seamless pipe, it is necessary to make strict requirements on the geometric dimensions of the pipe billet, the microstructure and the surface state of the low magnification.

Pipe billet diameter is too large or oval too large, will bite perforation conditions worse, but also because of tube diameter compression is too large to promote the occurrence of inflection.

Critical internal organization refers to the shrinkage and the central loose, non-metallic inclusions, gas accumulation and so on. The stringency of this requirement varies with the use of the seamless pipe and the type of steel.

The most important thing is the surface quality of the pipe billet, because in the pipe billet to any disability to the city seamless pipe products, and frequently dislocation sites will lead to stress concentration, plastic deformation will deepen and extend the handicap.

To sum up in order to produce high-quality seamless pipe products, the good quality of the tube is crucial to the first step.