Production Process of Bright Annealing Tube
Time：2015.10.09
Source: http://www.sssshangshang.com
Author：www.sssshangshang.com
People will not be unfamiliar with bright annealing tube as bright annealing tube has a wider application than any other stainless steel tube in our life.
Do you know what bright annealing is? Bright annealing means heat the stainless steel tube to the critical temperature in the annealing furnace. Then the microstructure portion has the phase changes or phase changes partly. The pearlite can be transformed into austenite. Keep the temperature for a while and the stainless steel tube will get cooled. The bright annealing tube is produced.
The purpose of annealing is to remove internal stress generated during thermal processing. The metal microstructure can be changed and the mechanical properties and cutting performance can be improved. As a professional bright annealing tube supplier, we can explain that the principle of bright annealing tube manufacturing process is as follows:
Austenite nuclei are generally formed on the phase interface of ferrite and cementite. In addition, in the boundary of pearlite nodules, larger undercooling on ferrite grain boundaries due to sub-atomic disorder, in an unstable state also can become austenite nucleation site. After austenite nucleation, it will produce two new phase interface, an austenitic and cementite phase interface, and the other is austenite and ferrite phase interface. Since the recovery of the carbon concentration at the interface added austenite carbon concentration distribution gradient, it will lead to the diffusion of carbon in austenite. What's more, the balance of the destruction will be damaged. This process is repeated over and over again.
As a professional bright annealing tube supplier, we can tell what should be paid attention to when manufacturing bright annealing tube:
1. Ammonia gas decomposition must thorough.
2. Operating temperature of annealing furnace should be 1050℃, but gradually warmed to 0 ℃ --40 ℃. (ammonia gas decomposition point) --- insulation --600 ℃ --- 800 ℃ ---- 1050 ℃.
3. Avoid frequently opening furnace shutdown to prolong the life of the furnace tube.
4. To avoid scratches feed tube, tube should be regularly purged with nitrogen.
5. Control the holding time.
That is all for bright annealing tube manufacturing. If you are looking for good bright annealing tube supplier, Shangshang is your best choice. You can buy all kinds of stainless steel pipe here at factory price. The sizes and specifications are various for you to choose from. For further information about our products, you can visit www.sssshangshang.com.
Do you know what bright annealing is? Bright annealing means heat the stainless steel tube to the critical temperature in the annealing furnace. Then the microstructure portion has the phase changes or phase changes partly. The pearlite can be transformed into austenite. Keep the temperature for a while and the stainless steel tube will get cooled. The bright annealing tube is produced.
The purpose of annealing is to remove internal stress generated during thermal processing. The metal microstructure can be changed and the mechanical properties and cutting performance can be improved. As a professional bright annealing tube supplier, we can explain that the principle of bright annealing tube manufacturing process is as follows:
Austenite nuclei are generally formed on the phase interface of ferrite and cementite. In addition, in the boundary of pearlite nodules, larger undercooling on ferrite grain boundaries due to sub-atomic disorder, in an unstable state also can become austenite nucleation site. After austenite nucleation, it will produce two new phase interface, an austenitic and cementite phase interface, and the other is austenite and ferrite phase interface. Since the recovery of the carbon concentration at the interface added austenite carbon concentration distribution gradient, it will lead to the diffusion of carbon in austenite. What's more, the balance of the destruction will be damaged. This process is repeated over and over again.
As a professional bright annealing tube supplier, we can tell what should be paid attention to when manufacturing bright annealing tube:
1. Ammonia gas decomposition must thorough.
2. Operating temperature of annealing furnace should be 1050℃, but gradually warmed to 0 ℃ --40 ℃. (ammonia gas decomposition point) --- insulation --600 ℃ --- 800 ℃ ---- 1050 ℃.
3. Avoid frequently opening furnace shutdown to prolong the life of the furnace tube.
4. To avoid scratches feed tube, tube should be regularly purged with nitrogen.
5. Control the holding time.
That is all for bright annealing tube manufacturing. If you are looking for good bright annealing tube supplier, Shangshang is your best choice. You can buy all kinds of stainless steel pipe here at factory price. The sizes and specifications are various for you to choose from. For further information about our products, you can visit www.sssshangshang.com.
