The whole process of stainless steel pipe production:
I. Calendering and annealing
A metal heat treatment process in which a workpiece is heated to a predetermined temperature and slowly cooled after a certain period of time. The purpose of annealing is to:
① Improve or eliminate various structural defects and residual stress caused by steel in the process of casting, forging, rolling and welding to prevent deformation and cracking of the workpiece.
② Soften the workpiece for cutting.
③ Refine the grains and improve the structure to improve the mechanical properties of the workpiece. ④ Prepare the organization for final heat treatment and pipe making
The slitting of stainless steel coils is to cut the stainless steel coils to the corresponding width for further deep processing and pipe making. The slitting process should pay attention to the scratches of the coils by the slitting knife, the width and error of the slitting In addition, the slitting is related to the pipe making process, and the striped cape and burr are very important for the pipe making process.
The most important process of stainless steel pipe. Stainless steel mainly uses argon arc welding and plasma welding. The protective gas for argon arc welding is pure argon. It mainly welds stainless steel pipes below 3mm. Plasma welding has a strong penetration force. 8mm stainless steel tube.
4. welding bead grinding
In the process of welding stainless steel pipes, the corresponding external bead needs to be polished and water cooled. After the water bead is cooled, the bead is directly polished with a water grinder until it is flat. 5 sets of water mills for grinding and dressing of weld beads.
The process of stainless steel welded pipe is called extrusion production. All square and rectangular pipes are initially produced from round pipes. Through the production of round pipes with the same perimeter, they are extruded into corresponding square and rectangular pipes. Mold shaping and straightening.
The manufacturing process of stainless steel tubes is relatively rough. Most of them are cut with abrasive wheels. After cutting, a cloak will be generated and further trimming is required. The other is a band saw for cutting. The use of the tube requires bright heat treatment, so that the ductility of the tube reaches a higher level.
Generally, there are several processes for surface treatment of product pipes and decorative pipes. Polishing is divided into 400 #, 600 #, and 800 #, while sandblasting is divided into round sand and straight sand, with 180 #, 240 #, and 400 #. , 600 #, 800 #, applicable to the needs of customers at different levels.
The inspection mainly checks whether the outer diameter and thickness of the pipe are up to standard, the surface treatment is up to standard, and the welding process is up to standard.