The cross-rolling piercing process is the most widely used in the production of seamless steel pipes, and was invented by the German Mannesmann brothers in 1883. The cross-rolling piercing machine includes two-roll cross-rolling piercing machine and three-roll cross-rolling piercing machine. The capillary quality defects produced by cross-rolling and piercing of tube blank mainly include inward fold, outward fold, uneven…
Read MorePiercing is the first process of deformation of hot-rolled seamless steel pipe, and its function is to pierce the solid tube blank into a hollow capillary tube. Due to the surface defects or eccentricity (uneven wall thickness) of the threaded capillary, it is difficult to eliminate or reduce it in the subsequent deformation process. Therefore, the quality of the…
Read MoreThe uneven wall thickness of the seamless tube(SMLS) is mainly manifested in the phenomenon of uneven wall thickness of the spiral shape, uneven wall thickness of the straight line, and thicker and thinner walls at the head and tail. The influence of continuous rolling process adjustment of seamless tubes is an important factor leading to uneven wall thickness of…
Read MoreAfter the quenching and tempering treatment of seamless pipes, the parts produced have good comprehensive mechanical properties and are widely used in various important structural parts, especially those connecting rods, bolts, gears and shafts that work under alternating loads. But the surface hardness is low and not wear-resistant. Tempering + surface quenching can be used to improve the surface…
Read MoreProject Location: Uzbekistan Product: Seamless steel pipe Standard and steel grade: GOST 8734-78 Specification: 18mm x 2mm
Read MoreAmong the many pipeline materials, the most practical one is seamless pipe (SMLS), which is a relatively powerful pipeline material, not only because of the wide range of application fields and scope of this pipeline material, but more importantly, Because the quality of seamless steel pipe is very good, the quality of seamless steel pipe is the reason why…
Read MoreThe scope of application of seamless tubes in production and life is getting wider and wider. The development of seamless tubes in recent years has shown a good trend. For the manufacture of seamless tubes, it is also to ensure its high-quality processing and production. I will give you some brief introductions about the production process of seamless tubes…
Read MoreAccording to different conditions, the metal material is heated to a suitable temperature and kept warm, and then cooled in different ways to change the metallographic structure of the metal material and obtain the required structural properties. This process is usually called metal material heat treatment. What three processes are included in the heat treatment of seamless tubes? Heat…
Read MoreXINYUE STEEL GROUP set up several production bases in Tianjin & Hebei Province, manufacturing ERW Steel Pipe, SSAW Steel Pipe, LSAW Steel Pipe, Seamless Steel Pipe, Scaffolding system and couplers, RHS, SHS, etc.
