Newest production process of seamless steel pipe

It is roughly divided into the oblique rolling method (mengnessmann method) and the kneading method.

The oblique rolling method (Mengnessmann method) is to first use a diagonal roll to perforate seamless steel tubes and then use a rolling mill to extend them. This method has a high production speed, but it has a higher requirement on the processability of seamless steel tubes. It is primarily suitable for the production of carbon steel and low-alloy steel tubes.

The kneading rule is to use a piercing machine to perforate seamless tube blanks or steel ingots and knead them into a seamless steel tube using a kneading machine. This method has lower power than the oblique rolling method and is suitable for producing high-strength alloy seamless steel tubes.

The oblique rolling method and the kneading method must first heat the tube blank or the steel ingot, and the produced steel tube is called a hot-rolled seamless steel tube. Seamless pipes produced by hot working can sometimes be cold-worked as needed. There are two kinds of cold processing methods: one is the cold drawing method, that is, drawing a seamless steel pipe through a pipe drawing die, so that the steel pipe gradually becomes thin and elongated; the other method is a cold rolling method, which is to Meng Neisiman. The siblings invented hot rolling mills used in cold working methods. Cold-working of seamless steel tubes can advance the standard accuracy and processing finish of steel tubes and improve the mechanical properties of materials.