1.4539 tube seamless stainless steel pipe and tubes bright annealed

1.4539 tube seamless stainless steel pipe and tubes The difference between bright annealing and general annealing:

1.4539 tube seamless stainless steel pipe and tubes General annealing refers to the fact that the surface of the stainless steel tube does not have any gas and is directly placed in the furnace for annealing. This annealed stainless steel pipe also needs to be subjected to surface pickling to remove the iron oxide scale produced on the surface during the process of destocking. Due to the corrosion of acid, the surface roughness decreases, so the gloss is poor and the surface looks white. not bright.

1.4539 tube seamless stainless steel pipe and tubes bright annealed:

1.4539 tube seamless stainless steel pipe and tubes bright annealing is divided into two types, one is annealing under the protection of full hydrogen, the hydrogen comes from electrolysis or third-party supply, with high purity and low dew point, the other is decomposed with ammonia, The decomposed gas enters the furnace as a protective gas after drying, and its purity and dew point are relatively poor. However, the two methods are similar in that they both use hydrogen as the protective gas. The furnace body has a special structure. There is a thing called "muffle" inside. The flame first heats the "muffle", and then the heat is transferred by heat conduction. It is transmitted to the strip, which avoids the oxidation of the strip, so the strip after bright annealing does not need to be pickled again, and the strip "basically" maintains the original roughness, so the bright annealed strip is better than the general annealed strip. Steel is bright.