Influencing factors of annealing of stainless steel seamless elbow
The stainless steel seamless elbow has an annealing process, which is a necessary process in its processing, mainly to ensure the improvement of performance.
There are mainly several influencing factors in the annealing of stainless steel seamless elbows, which are explained below:
1. The tightness of the furnace body The bright annealing furnace should be closed and isolated from the outside air.
Nitrogen is used as the protective gas, and only one exhaust port is used to ignite the exhausted hydrogen. You can use soapy water to check, and wipe it on the joints of the annealing furnace to check whether there is air leakage. The place where the air is most likely to escape is the place where the annealing furnace enters the pipe and the pipe exits. This is because these two positions are easy to wear, so It should be checked and replaced frequently.
2. Whether the annealing temperature reaches the specified temperature.
Stainless steel seamless elbows generally use solution heat treatment, which is the so-called annealing treatment. The temperature is in the range of 1040-1120 ° C. It can be observed through the observation hole of the annealing furnace. The surface of the stainless steel seamless elbow in the annealing area should be Incandescent state, but there will be no sagging of the softened spreader.
3. Moisture in the furnace.
① Check whether the furnace material is dry. The furnace material should be dried when the furnace is installed for the first time.
② Check whether there is too much water stain on the stainless steel pipe entering the furnace, especially the pipe with holes, and it is forbidden to leak water into it, otherwise it will destroy the atmosphere in the furnace.
4. Annealing atmosphere.
Generally, hydrogen is used as the annealing atmosphere. If part of the gas in the atmosphere is an inert gas, the temperature can be lower but at the same time it cannot contain too much oxygen and water vapor.
5. Protect air pressure.
The protective air pressure is to prevent micro-leakage, and the protective air pressure in the furnace should maintain a corresponding positive pressure. If it is hydrogen protective gas, it is generally required to be above 20KBar.
Therefore, the annealing treatment during production and processing should pay attention to the above points.
Influencing factors of annealing of stainless steel seamless elbow
The stainless steel seamless elbow has an annealing process, which is a necessary process in its processing, mainly to ensure the improvement of performance.
There are mainly several influencing factors in the annealing of stainless steel seamless elbows, which are explained below:
1. The tightness of the furnace body The bright annealing furnace should be closed and isolated from the outside air.
Nitrogen is used as the protective gas, and only one exhaust port is used to ignite the exhausted hydrogen. You can use soapy water to check, and wipe it on the joints of the annealing furnace to check whether there is air leakage. The place where the air is most likely to escape is the place where the annealing furnace enters the pipe and the pipe exits. This is because these two positions are easy to wear, so It should be checked and replaced frequently.
2. Whether the annealing temperature reaches the specified temperature.
Stainless steel seamless elbows generally use solution heat treatment, which is the so-called annealing treatment. The temperature is in the range of 1040-1120 ° C. It can be observed through the observation hole of the annealing furnace. The surface of the stainless steel seamless elbow in the annealing area should be Incandescent state, but there will be no sagging of the softened spreader.
3. Moisture in the furnace.
① Check whether the furnace material is dry. The furnace material should be dried when the furnace is installed for the first time.
② Check whether there is too much water stain on the stainless steel pipe entering the furnace, especially the pipe with holes, and it is forbidden to leak water into it, otherwise it will destroy the atmosphere in the furnace.
4. Annealing atmosphere.
Generally, hydrogen is used as the annealing atmosphere. If part of the gas in the atmosphere is an inert gas, the temperature can be lower but at the same time it cannot contain too much oxygen and water vapor.
5. Protect air pressure.
The protective air pressure is to prevent micro-leakage, and the protective air pressure in the furnace should maintain a corresponding positive pressure. If it is hydrogen protective gas, it is generally required to be above 20KBar.
Therefore, the annealing treatment during production and processing should pay attention to the above points.