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 Precision tube manufacturer
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Precision tube manufacturer

Contact person: manager Yan
Hand machine: 13603273751
Tel: 13603273751
Address: No.1, North Hehai village, JIANGGUANTUN office, Liaocheng Economic Development Zone, Shandong Province (ANZ logistics company)

Processing of 45 ා finish rolling seamless pipe

Release time: September 21, 2020 popularity: one

No. 45 seamless steel tube is made from ingot or solid tube blank by piercing and then hot rolling, cold rolling or cold drawing. 45 seamless steel pipe plays an important role in China's steel pipe industry. According to incomplete statistics, there are more than 240 seamless steel pipe manufacturers in China, and there are more than 250 sets of seamless steel pipe mills with an annual capacity of more than 4.5 million tons. In terms of caliber< φ 76, accounting for 35%< φ 159-650, accounting for 25%. In terms of varieties, general purpose pipes are 1.9 million tons, accounting for 54%; 760000 tons of oil pipes, accounting for 5.7%; Hydraulic prop Precision tube 150000 tons, accounting for 4.3%; Stainless pipe, bearing pipe and automobile pipe were 50000 tons, accounting for 1.4%.

The raw material for rolling No.45 seamless steel pipe is round tube blank. The round tube blank is cut by cutting machine, and the billet with a growth of about 1 m is sent to the furnace by conveyor belt for heating. The billet is heated in a furnace at about 1200 degrees Celsius. The fuel is hydrogen or acetylene. The temperature control in the furnace is a key problem. After the round tube is discharged from the furnace, it needs to pass through the pressure piercer.

Generally, the more common piercer is the cone roll piercer. This kind of piercer has high production efficiency, good product quality, large perforation diameter expansion, and can wear a variety of steel grades. After piercing, the round billet is successively rolled by three roll cross rolling, continuous rolling or extrusion. After extrusion, the tube should be removed for sizing. The sizing machine rotates the cone drill bit into the steel blank at high speed to form a steel pipe. The inner diameter of the steel pipe is determined by the outer diameter length of the drill bit of the sizing machine.

After sizing, the 45 seamless steel pipe enters the cooling tower and is cooled by water spray. After cooling, the steel pipe will be straightened. After straightening, No.45 seamless steel pipe is sent to metal flaw detector (or hydraulic test) by conveyor belt for internal flaw detection. If there are cracks and bubbles inside the steel pipe, it will be detected.


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