金年会 金字招牌诚信至上,金年会 金字招牌诚信至上,金年会 金字招牌诚信至上,金年会 金字招牌诚信至上

Processing method of large diameter seamless steel tube

Processing method of large diameter seamless steel tube

Medium frequency pipe expander has the characteristics of high production efficiency, low labor cost and intelligent constant temperature.The processing method of large diameter thick-wall seamless steel pipe relates to the field of mechanical processing, specifically to the processing method of large diameter thick-wall seamless steel pipe, including the following steps:Smelting and treatment of billet, ingot (or billet) is the raw material for pipe making, cold ingot, ingot surface cracks to be cleaned and polished, pits and pits generated after cleaning to carry out special treatment to prevent folding, ingot rising and bottom must be removed;The billet is heated before forging, and the vertical heating flame can not be sprayed directly to the billet. In addition, it is advisable to heat the billet below 1290℃ with gas fuel, and the heating rate is 50 ~ 150℃ / h.Fold the material and deal with the defects, the billet is descaled, that is, the oxide scale around the billet is knocked off, to prevent the oxide scale from falling into the mold and forming surface defects in the forging process;The medium frequency pipe expanding machine has the advantages of simple operation process, reasonable design, avoiding waste products, reducing the consumption of raw materials and energy, and significantly improving labor productivity, thus bringing good economic benefits.

Thermal expansion pipe is only a kind of pipe expansion manufacturing process, welded pipe and seamless pipe can be thermal expansion.

How to distinguish what is the hot expanding pipe machine: can be in the appearance of the steel pipe, the hot expanding is red, the inside diameter is lead powder.

We often say that the thermal expansion machine refers to the low density but strong shrinkage of the steel pipe, (seamless steel pipe) can be referred to as the thermal expansion pipe.A fine rolling process in which the diameter of the pipe is enlarged by cross rolling or drawing.The steel pipe can be thickened in a short time to produce non-standard and special seamless tubes with low cost and high production efficiency, which is the development trend in the field of international tube rolling at present.

Seamless steel pipe:The product is made of high quality coil plate, after re-inspection qualified longitudinal shear or coil automatic forming and welding, in the computer control of the best fusion temperature at the same time, remove the inner and outer burr of the steel pipe, non-destructive testing qualified steel pipe in the atmosphere of very little oxidation of the overall heating to 910℃-950℃, in addition to the scale by the tension reducing machine multi-pass rolling,The microstructure, grain size, geometrical size and mechanical properties of steel tubes are uniform.

Want to make a difference between the two can also be seen in the appearance of the steel pipe, the thermal expansion is red, and the inside diameter is lead powder