The heat treatment process of Professional manufacturer aisi 304 0.4mm stainless steel sheet is basically the same as that of ordinary stainless steel sheet. The typical heat treatment process of 300 series austenitic stainless steel is solution treatment. During the heating process, the carbides are dissolved into the austenite, heated to 1050-1150°C, and kept for a short period of time, so that all the carbides are dissolved in the austenite, and then rapidly cooled to below 350°C to obtain a supersaturated solid solution that is uniform. unidirectional austenite structure. The key to this heat treatment process is rapid cooling. The cooling rate is required to reach 55 °C/s, and it will quickly pass through the reprecipitation temperature zone (550 ~ 850 °C) after carbide solid solution. The holding time should be as short as possible. Surface finish.
The heating temperature of 400 series ferritic stainless steel is relatively low (about 900 ℃), and slow cooling is often used to obtain annealed softening structure. Martensitic stainless steel can also be treated by segmental quenching and then tempering. Another key problem in the heat treatment of stainless steel cold-rolled strip is that the entire strip is required to be uniform in width and length. The muffle type bright annealing furnace adopts a large size muffle tube, and the heating airflow is evenly organized from the outside of the muffle tube to spiral around, so that the strip is heated evenly. To ensure the uniformity of the strip along the length direction, it is necessary to keep the linear velocity of the strip in the heating furnace constant.
Therefore, the roller tension adjustment device that can be precisely adjusted is installed before and after the modern vertical bright heat treatment furnace. It not only needs to make the strip import and export speed meet the requirements of the heat treatment speed, and is not affected by the amount of loopers empty or full, but also to establish and precisely adjust the strip according to the shape of the professional manufacturer aisi 304 0.4mm stainless steel sheet. Small tension to meet the requirements of the plate type.