The brightness of the industrial titanium plate after annealing determines the quality of the industrial pure titanium plate, and there are many factors that affect the brightness, the most important are the following five points:
1. Whether the annealing temperature can reach the regular temperature. The heat treatment of industrial pure titanium plate usually adopts solution heat treatment, which is what we usually call “annealing”. The temperature scale of high temperature industrial pure titanium plate is 1040~1120℃. You can also investigate through the annealing furnace survey hole. The industrial pure titanium plate tube in the annealing area should be incandescent, but it does not show softening and sagging.
2. Annealing atmosphere. Usually, pure hydrogen is used as the annealing atmosphere. The best purity of the atmosphere is more than 99.99%. If some of the atmosphere is inert gas, the purity can be lower, but it must not be rich in too much oxygen and water vapor.
3. Furnace body tightness. The bright light annealing furnace should be closed and blocked from outside air; hydrogen is used as the maintenance gas, as long as one exhaust port is open (used to light the discharged hydrogen). Check the method to use soapy water on the joints of the annealing furnace to see if it can run out of gas; the simplest place to run out of gas is the place where the annealing furnace enters the industrial pure titanium plate tube and the place where the industrial pure titanium plate tube exits. This local sealing ring is extremely simple to wear, so you have to check it often and change it frequently.
4. Maintain air pressure. In order to avoid micro-leakage, the maintenance gas in the high-temperature industrial pure titanium plate furnace should adhere to a certain positive pressure. If it is hydrogen maintenance gas, it usually requires more than 20kBar.
5. Water vapor in the furnace. On the one hand, check whether the furnace body data is boring, the furnace body data must be dried for the initial installation of the furnace; second, whether the industrial pure titanium plate tube entering the furnace can leave too much water stains, if there is a hole on the extra tube, don’t Don’t let any water leak in, otherwise the atmosphere of the furnace will be completely destroyed.
It is basically these that should be paid attention to. Normally, the high-temperature resistant industrial pure titanium plate that should be backed about 20 meters after the furnace is started will start to shine and shine brightly.