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Why Industrial Stainless Steel Pipes Need To Be Annealed

Views: 379     Author: Iris     Publish Time: 2024-05-15      Origin: Hangao(SEKO)


For industrial-grade precision stainless steel pipes, the annealing process during the production process is a crucial link. Its main purpose is to adjust the internal organizational structure of the steel pipe, eliminate internal stress, and improve the plasticity and toughness of the steel pipe to meet the needs of different usage scenarios. Below, Hentech will discuss in depth the reasons why high-performance stainless steel pipes require annealing processes.


First, let’s take a look at the factors that affect the performance of stainless steel pipes during processing. Stainless steel is an alloy steel with a high content of alloy elements such as chromium and nickel, so it also has high strength and corrosion resistance. However, during the secondary processing of steel pipes, such as rolling and stretching, a certain amount of internal stress will be generated inside the steel pipe, which will reduce the plasticity and toughness of the steel pipe and affect the performance of the steel pipe. At the same time, some organizational structures that are not conducive to the performance of the steel pipe may also be formed during the processing, such as martensite.


To solve these problems, the induction heating bright annealing furnace's process came into being. Annealing recrystallizes the internal structure of the steel pipe through heating and heat preservation, eliminates internal stress, and improves the plasticity and toughness of the steel pipe. Specifically, the annealing process mainly includes the following steps:

1. Heating: Heating the steel pipe to a certain temperature allows the atoms inside the steel pipe to obtain enough energy to begin migration and reorganization.

2. Insulation: Maintain the heating temperature for a certain period of time to fully recrystallize the internal structure of the steel pipe and eliminate internal stress.

3. Cooling: Slowly cool the steel pipe to room temperature to keep the internal structure of the steel pipe stable and avoid the generation of new internal stress.


Through the annealing process, stainless steel pipes can obtain the following advantages:

1. The plasticity and toughness of the pipe are improved: Annealing treatment can help eliminate the internal stress of the steel pipe, improve the plasticity and toughness, and enable the steel pipe to better withstand deformation and impact when subjected to external forces.

2. The corrosion resistance of the steel pipe is improved: Through annealing heat treatment, the organizational structure of the steel pipe can be optimized, and the corrosion resistance of the steel pipe is improved, so that it can maintain stable performance under different environmental conditions.

3. Improve the processing performance of steel pipes: Annealing the pipes can reduce the hardness of the steel pipes and improve the processing performance, making it easier for the steel pipes to be cut, bent, welded, etc. in subsequent processes, reducing pipe cracking and increasing output. Rate.

4. The service life of the steel pipe can be effectively improved: annealing the steel pipe can eliminate defects and hidden dangers inside the steel pipe, and the overall performance and service life of the steel pipe can be effectively improved.


In short, for stainless steel industrial pipes, whether seamless pipes or welded pipes, the annealing and heating process is of great significance. Through this heat treatment, the organizational structure of the steel pipe is effectively optimized, internal stress is eliminated, thereby improving the plasticity and toughness of the steel pipe, and the corrosion resistance and processing performance of the pipe are greatly improved, thereby extending the service life of the steel pipe and reducing the cost of use. Therefore, in the production process of stainless steel pipes, the annealing process is very necessary. If you have any questions about the annealing process of steel pipes that need to be answered, please feel free to contact Hangao Machinery for consultation. We are more than happy to serve you!

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Every time the finishing tube is rolled, it must go through the process of solution treatment. Ta ensure that the performance of the steel pipe meets the technical requirements. and to provide guarantee for the post-process processing or use. Bright solution treatment process of ultra-long seamless steel pipe has always been a difficulty in the industry.

Traditional electric furnace equipment is large,covers a large area, has high energy consumption and large gas consumption, so it is difficult for realize bright solution process. After years of hard work and innovative development, the use of current advanced induction heating technology and DSP power supply. Precision control of heating temperature to ensure that the temperature is controlled within t2C,to solve the technical problem of inaccurate induction heating temperature control. The heated steel pipe is cooled by "heat conduction"in a special closed cooling tunnel, which greatly reduces the gas consumption and is more environmentally friendly.
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