Three production methods of carbon steel seamless tube

by chase.Liu on Nov 25, 2021 Security 280 Views

seamless pipe means:A seamless pipe is a tube that does not have any welding seam. Seamless pipes are derived from solid steel that is in sheet or bar form and is formed into a solid round shape known as “billets” which are then heated and cast over a form such as a piercing rod to create a hollow tube or shell. A seamless tube may also be known as a seamless pipe.

The application field of carbon steel seamless tube is very wide, many machinery and engineering will use it, so how is it produced?

1. Reducing rolling and sizing rolling

Although there is no technical development worthy of special introduction in reducing rolling and sizing rolling for final adjustment of outer diameter, many large-diameter sizing machines also use three-roll sizing machines. The disadvantage of using three rolls is that the roll pitch cannot be changed, so the number of stands is large, but rolling mills with variable roll pitches have recently appeared, and the idea of ​​a four-roll reducer has also been proposed. In the future, the direct connection technology of the mandrel-type seamless tube rolling mill and the sizing machine and the tension reducer will also arouse people's attention. The development of mandrels for high-alloy piercing in the steel pipe field mentioned above and the development of mandrels and blank guide groove lubricants are closely related to tribological technology. Therefore, it is hoped that further development of technology for longevity will be made. .

2. Stretch rolling

The mandrel-type seamless tube rolling mill has been developed in the direction of large-scale and compact. The number of stands is reduced from 7-9 stands to 4-5 stands, and the total energy consumption required for the piercing machine and mandrel seamless tube rolling can be reduced by about 20%. In the control technology of the mandrel-type seamless tube rolling mill, in order to reduce the cutting loss of the tube end wall thickness in the tension reducer, the tube end pre-thinning forming technology was developed, that is, the mandrel-type seamless tube The rolling mill uses the forming technology of thinning the pipe ends in advance, and the hydraulic pressure reduction device is used for the first time on the steel pipe rolling mill.

3. Piercing and rolling

The PPM (pressure roll piercing machine) that uses square billets has been replaced with an oblique roll piercing machine that uses round billets. The advantage of the conical piercing machine is that it has the effect of rotary forging and the effect of restraining the shear deformation in the circumferential direction, so it can suppress the defects of the inner surface of the steel pipe, and can be used for perforating difficult-to-process materials, especially for reaming and thin-wall perforation. . When using an ordinary piercing machine, the limit of the wall thickness/outer diameter ratio (T/D) is about 6%, while when using a conical piercing machine, thin-walled pipes with a T/D of 3.2% can be pierced.

Article source: https://article-realm.com/article/Internet-Business/Security/17472-Three-production-methods-of-carbon-steel-seamless-tube.html

Reviews

Guest

Overall Rating:

Comments

No comments have been left here yet. Be the first who will do it.
Safety

captchaPlease input letters you see on the image.
Click on image to redraw.

Statistics

Members
Members: 13874
Publishing
Articles: 58,269
Categories: 202
Online
Active Users: 955
Members: 8
Guests: 947
Bots: 4689
Visits last 24h (live): 3854
Visits last 24h (bots): 18900

Latest Comments

Thank you! I'm glad you found the quote valuable. <a href="https://dahlcore.com/armed-security-guard">Armed Security New York</a>        
 Apartments are the affordable choice to lead a stress-free life with your family and friends. color blind test
What are your thoughts on the attractiveness of the way connections game appears?
Translation services in Dubai have become essential for businesses looking to expand their reach globally. With the diverse population and international business community in Dubai, the need for...
on Mar 23, 2024 about Interpreters in Dubai
<a href="https://rummystar.io/">rummystar</a> <br>  
on Mar 23, 2024 View Subject