Structure and working principle of bright annealing furnace for stainless steel tube
Nov. 21, 2020
Structure and working principle of bright annealing furnace for stainless steel tube
The structure of stainless steel tube bright annealing furnace:
The stainless steel continuous bright annealing furnace includes heating furnace, water-cooling equipment, stainless steel muffle tube, front and rear transmission material table, electrical control and ammonia decomposition furnace. The annealing furnace is a process used in the manufacture of semiconductor devices, which involves heating multiple semiconductor wafers to affect their electrical properties. Heat treatment is designed for different effects. The wafer can be heated to activate the dopant, convert the thin film into a thin film or the thin film into a wafer substrate interface, make a densely deposited thin film, change the state of the grown thin film, repair the implanted damage, move the dopant or dope The agent is transferred from one film to another or from the film into the wafer substrate. Separately install stainless steel muffle tubes in the heating furnace and cooling chamber. The muffle tube is equipped with stainless steel belts (or stainless steel mesh belts) for carrying workpieces in and out. The transmission material table is separately set before the heating furnace and after the cooling chamber; the lower part of the material table is equipped with a main , Driven wheel and S roller group, the reducer drives the above-mentioned driving wheel to rotate continuously through the chain transmission, so that the stainless steel mesh belt drives the workpiece above it to move forward, so that the workpiece is evenly heated, without bumps, and has little deformation. The maintenance of the gas in the tube isolates the outdoor air, and the workpiece is not oxidized, achieving the purpose of bright annealing.
Continuous bright annealing furnace
Purpose: Used for continuous bright annealing of copper straight pipes (rods), steel pipes, aluminum pipes or coils of different specifications under a controlled atmosphere.
Features: The workpiece continuously passes through preheating, heating, heat preservation, slow cooling, and cooling, without being restricted by length. The transmission adopts roller type synchronous transmission, frequency conversion speed regulation, stable and reliable. Through protective atmosphere and strong thermal atmosphere circulation, the temperature is uniform, and the inner and outer surfaces are very bright. The unique design of the cooling zone ensures uniform cooling of the workpiece. The processed products have bright internal and external surfaces, high product quality and high productivity.
Heating method: electric heating or gas heating.
Production line composition: front roller table, front ventilating chamber, front preheating zone, heating furnace, slow cooling zone, cooling zone (including transition zone and strong air cooling zone), rear ventilating chamber (water cooling zone), rear roller Material system, computer control system, electrical control system, protective atmosphere device.
The principle of stainless steel tube annealing:
After eliminating the work hardening of stainless steel pipes, a satisfactory metallographic arrangement can be obtained. The annealing equipment is a stainless steel continuous bright annealing furnace, which is mainly used for heat treatment of stainless steel products in a maintenance atmosphere. When the application performance requirements of stainless steel tubes are different, the requirements for the metallographic arrangement after bright annealing are different, so the bright heat treatment process will also be different.
The typical heat treatment process of 300 series austenitic stainless steel is solution treatment. In the heating process, the carbide is dissolved into the austenitic stainless steel, heated to 1150, and then kept for a short period of time, the carbide can be completely dissolved in the austenite arrangement, and then quickly cooled to 55/s, and then passed quickly The re-precipitation temperature zone after carbide solid solution is 850). The heat preservation time of other stainless steel pipes should be as short as possible, otherwise it will make the grains coarse and affect the surface finish.
The 400 series ferritic stainless steel has a relatively low heating temperature), and to a large extent, slow cooling is used to obtain an annealing softening arrangement. The annealing method used in martensitic stainless steel can also be treated by the method of quenching and tempering in sections.
