MENU

/
/
Key technology of precision welded pipe production by used welded pipe machine—Weld heat treatment

Key technology of precision welded pipe production by used welded pipe machine—Weld heat treatment

  • Sort:Information
  • Auth:
  • Source:
  • Release time:2022-11-02 11:30
  • Pvs:

【概要描述】Used welded pipe machine often consider many key technologies when producing precision welded pipes, such as ① quality requirements for raw materials. ② welded pipe forming process. ③ formation and removal of weld burrs. ④ weld heat treatment. ⑤ non-destructive testing. ⑥ correct Equipment requirements for welded pipe unit. For this reason, we introduce the ② welded pipe forming process to be considered in the production of precision welded pipes.

Key technology of precision welded pipe production by used welded pipe machine—Weld heat treatment

【概要描述】Used welded pipe machine often consider many key technologies when producing precision welded pipes, such as ① quality requirements for raw materials. ② welded pipe forming process. ③ formation and removal of weld burrs. ④ weld heat treatment. ⑤ non-destructive testing. ⑥ correct Equipment requirements for welded pipe unit. For this reason, we introduce the ② welded pipe forming process to be considered in the production of precision welded pipes.

  • Sort:Information
  • Auth:
  • Source:
  • Release time:2022-11-02 11:30
  • Pvs:
Detail

Used welded pipe machine often consider many key technologies when producing precision welded pipes, such as ① quality requirements for raw materials. ② welded pipe forming process. ③ formation and removal of weld burrs. ④ weld heat treatment. ⑤ non-destructive testing. ⑥ correct Equipment requirements for welded pipe unit. For this reason, we introduce the ② welded pipe forming process to be considered in the production of precision welded pipes.

 

Used welded pipe machine

 

Precision welded pipes are more accurate in geometric dimensions than general welded pipes, and the welds and inner and outer surfaces are of good quality, and the wall thickness is uniform. It can be used in equipment components directly or with a small amount of processing. It is widely used in chemical, textile machinery, aviation, instrumentation, automotive and other sectors.

 

Used welded pipe machine

 

The welding process of high-frequency welded steel pipes in used welded pipe machine is carried out under the conditions of high heating speed and high cooling speed. The sharp temperature changes cause certain welding stress, and the structure of the weld seam also changes. Welding along the weld seam The structure in the central area is low-carbon martensite and a small area of free ferrite; the transition area is composed of ferrite and granular pearlite; and the parent structure is ferrite and pearlite. Therefore, the performance of the steel pipe is due to the difference between the metallographic microstructure of the weld and the parent body, which leads to an increase in the strength of the weld, while a decrease in the plasticity index, and the process performance deteriorates. In order to change the performance of the steel pipe, it is necessary to use heat treatment to eliminate the microstructure difference between the weld and the parent metal, refine the coarse grains, make the structure uniform, remove the stress generated during cold forming and welding, and ensure the quality of the weld and the quality of the steel pipe. Process and mechanical properties, and adapt it to the production requirements of the subsequent cold processing process.

 

Used welded pipe machine

 

There are generally two types of heat treatment processes for precision welded pipes of used welded pipe machine:

(1) Annealing: mainly to eliminate welding stress and work hardening, and improve the weld ductility of welded pipes. The heating temperature is below the phase transition point.

 

(2) Normalizing (normalizing treatment): It is mainly to improve the unevenness of the mechanical properties of the welded pipe, make the mechanical properties of the parent metal and the metal at the weld close, and improve the metal microstructure and refine the grain. The heating temperature is air-cooled at a certain point above the phase transition point.

 

Used welded pipe machine

 

According to the different use requirements of the precision welded pipe produced by the used welded pipe machine, it can be divided into weld heat treatment and overall heat treatment.

 

(1) Weld heat treatment: It can be divided into online heat treatment and offline heat treatment.

Weld heat treatment: After the steel pipe is welded, a set of intermediate frequency strip-shaped induction heating devices are used for heat treatment along the axial direction of the weld, and the diameter is directly sizing after air cooling and water cooling. This method only heats the weld area, does not involve the steel pipe matrix, and aims to improve the weld structure and eliminate welding stress, without the need to fix the heating furnace. The welding seam is heated under the rectangular sensor. The device is equipped with a temperature measuring device automatic tracking device. When the welding seam is deflected, it can automatically center and perform temperature compensation. It can also use the welding waste heat to save energy. Its biggest disadvantage is the heating zone. The temperature difference between and the non-heated zone will cause significant residual stress, and the operating line is longer.

 

Used welded pipe machine

 

(2) Overall heat treatment: it can be divided into online heat treatment and offline heat treatment

On-line heat treatment: After the steel pipe is welded, use two or more intermediate frequency ring-shaped induction heating devices to heat the whole pipe, heating to the normalized temperature of 900~920℃ in a short time, holding for a certain period of time, and air cooling to 400℃Normally cool down after the temperature is below, so that the whole tube organization is improved.

关键词:

More News

In the face of high-frequency pipe burning machine equipment failure, what are the special precautions for second-hand high-frequency pipe welding machine?
In the face of high-frequency pipe burning machine equipment failure, what are the special precautions for second-hand high-frequency pipe welding machine?
The second-hand high-frequency pipe welding machine has a history of previous use, and its product characteristics are often more complex, requiring users to pay attention to the following aspects when purchasing and using.
Detail
The second-hand high-frequency pipe welding machine has a history of previous use, and its product characteristics are often more complex, requiring users to pay attention to the following aspects when purchasing and using.
Second-hand high-frequency pipe welding machine common problems: how to identify and solve?
Second-hand high-frequency pipe welding machine common problems: how to identify and solve?
there are some common problems that can be encountered when choosing and using second-hand high-frequency pipe welding machine.
Detail
there are some common problems that can be encountered when choosing and using second-hand high-frequency pipe welding machine.
Environmental responsibility and economic benefits-the position of second hand high-frequency welded pipe mills in the sustainable development trend
Environmental responsibility and economic benefits-the position of second hand high-frequency welded pipe mills in the sustainable development trend
 As a key equipment for steel pipe production, second hand high-frequency welded pipe mills show their unique position in such industry trends.
Detail
 As a key equipment for steel pipe production, second hand high-frequency welded pipe mills show their unique position in such industry trends.
Investment perspective-The market trend of second-hand high-frequency welded pipe mills as a cost saving solution
Investment perspective-The market trend of second-hand high-frequency welded pipe mills as a cost saving solution
With the slowdown of global economic growth and the improvement of cost awareness, many pipe manufacturers have begun to look for more economical and affordable equipment renewal methods, and the second-hand high-frequency welded pipe mills market has thus developed rapidly.
Detail
With the slowdown of global economic growth and the improvement of cost awareness, many pipe manufacturers have begun to look for more economical and affordable equipment renewal methods, and the second-hand high-frequency welded pipe mills market has thus developed rapidly.
Contact information
Tel: +86-13392281699
Wechat: 13392281699
Email: zty@usedpipemill.com
Company address:No. A99, East Lecong Avenue, Lecong Town, Foshan City, Guangdong Province

Recommendation

Online Inquiry

留言应用名称:
底部留言
描述:

LINK

Contact Us

Tel (wechat): 13336487288
Wechat:+86 13336487288

WhatsApp:+86 13336487288
Email: zty@usedpipemill.com

Address: No. A99, Lecong Avenue East, Lecong Town, Foshan City, Guangdong Province

QRCODE

Copyright 0 2021 jinyujie. 粤ICP备13051810号 Powerby:  300.cn