What factors affect the surface polish brightness of a sanitary valve?
May 21, 2021| The quality of the sanitary valve will be directly determined by the brightness of the product after annealing.Of course, there are many kinds of things that can affect its brightness. The five most important factors are as follows:
1. Whether the annealing temperature has reached the specified temperature of stainless steel pipe heat treatment is generally taken solution heat treatment, and this is usually referred to as "annealing", the temperature norm at about 1040~1120 degrees.You can also observe through the observation hole of the annealing furnace, the stainless steel pipe fittings in the annealing area are basically incandescent, but there is no softening and sagging.
2. Annealing atmosphere is basically going to use pure hydrogen as an annealing atmosphere, And the purity of the atmosphere is more than 99.99%,if the other part of the atmosphere is inert gas,then the purity can be lower, but absolutely can not contain too much oxygen and water vapor.
3 furnace body sealing bright annealing furnace should be closed, isolated from the outside air;If hydrogen gas is used as a shield, only one vent is open (to ignite the discharged hydrogen).The method of inspection can be used to wipe the joint cracks of the annealing furnace with soapy water to see whether the gas runs;The easy place to run gas is the place where the annealing furnace enters the pipe and the place where the pipe comes out. The sealing ring in this place is particularly easy to wear and tear, so it is necessary to check and change frequently.
4. Protective gas pressure In order to prevent micro-leakage, the protective gas in the furnace should maintain a certain positive pressure. If it is hydrogen protective gas, it is generally required to be above 20kBar.
5. On the one hand, the water vapor in the furnace needs to check whether the furnace material is dry. In the initial loading of the furnace, the furnace material must be dried;Two is whether the stainless steel tube into the furnace remains too much water stains, especially if there is a hole on the pipe, do not leak into the, otherwise it will be the atmosphere of the furnace all to destroy.Generally if normal, after opening the furnace should be back about 20 meters of stainless steel pipe will begin to shine, and is the kind of bright reflective, the important matters that need to pay attention to is that we mentioned above the knowledge, but also hope that we can pay more attention to in the production.
2. Annealing atmosphere is basically going to use pure hydrogen as an annealing atmosphere, And the purity of the atmosphere is more than 99.99%, if the other part of the atmosphere is inert gas,then the purity can be lower,
4. Protective gas pressure In order to prevent micro-leakage, the protective gas in the furnace should maintain a certain positive pressure. If it is hydrogen protective gas, it is generally required to be above 20kBar.
5. On the one hand, the water vapor in the furnace needs to check whether the furnace material is dry. In the initial loading of the furnace, the furnace material must be dried;Two is whether the stainless steel tube into the furnace remains too much water stains, especially if there is a hole on the pipe, do not leak into the, otherwise it will be the atmosphere of the furnace all to destroy.Generally if normal, after opening the furnace should be back
3 furnace body sealing bright annealing furnace should be closed, isolated from the outside air;If hydrogen gas is used as a shield, only one vent is open (to ignite the discharged hydrogen).The method of inspection can be used to wipe the joint cracks of the annealing furnace with soapy water to see whether the gas runs;The easy place to run gas is the place where the annealing furnace enters the pipe and the place where the pipe comes out. The sealing ring in this place is particularly easy to wear and tear, so it is necessary to check and change frequently.
4. Protective gas pressure In order to prevent micro-leakage, the protective gas in the furnace should maintain a certain positive pressure. If it is hydrogen protective gas, it is generally required to be above 20kBar.
5. On the one hand, the water vapor in the furnace needs to check whether the furnace material is dry. In the initial loading of the furnace, the furnace material must be dried;Two is whether the stainless steel tube into the furnace remains too much water stains, especially if there is a hole on the pipe, do not leak into the, otherwise it will be the atmosphere of the furnace all to destroy.Generally if normal, after opening the furnace should be back about 20 me