The production process of 304 stainless steel tube:
a. Round steel ready; b. Heating; c. Hot rolling perforation; d. Cut the head; e. Pickling; f. Grinding; g. Lubrication; h. Cold rolling; i. Degreasing; j. solution heat treatment; k. Straightening; l. cut; m. Pickling; n. Product testing.
TIG welding for 304 stainless steel tube production process is as follows:
Rolling - Slitting - Straightening - Straightening - Cutting - Tooth welding - Sleeve - Forming - TIG welding - To the outside of the solder - (to within the welding) - cooling - sizing - eddy current testing - flying saw Cut off
After the cut off the 304 stainless steel tube according to product use is divided into the following three cases:
(1) Do not need heat treatment and drawing of the pipe by straightening a flat head of a water pressure check a packaging a storage;
(2) The need for heat treatment of the pipe by degreasing a bright heat treatment of a straightening an ultrasonic flaw detection of a flat head of a water pressure to check a packaging a storage;
(3) The need to pull the pipe by the degreasing a forging a straightening a straightening a pickling a lubrication a pull all the head of a degreasing a bright annealing a finishing a check a packaging a storage;
304 stainless steel tube welding technology, the application of multiple electrodes (usually three electrodes) of the multi-torch welding, it can be a combination of argon arc welding and plasma welding. Multi-torch welding for wall thickness greater than 2mm of the pipe, welding speed than the torch 3 to 4 times higher, welding quality can be improved. In addition, in the argon to add 5% to 10% of the hydrogen, and then the use of high-frequency pulse welding power supply, can improve the welding speed; to ensure the quality of welding welding torch with automatic tracking device, arc voltage automatic control system (AVC ), computer-controlled welding process. Clear the method of internal welding: (1) the inner wall of the gas technology, the wall filled with a certain pressure of inert gas to hold the molten droplets, do not make it sagging, which does not form a solder; (2) for φ30mm below the pipe; (3) inner wall rolling technology, suitable for φ50mm above the pipe; decorative tube to be equipped with high efficiency grinding and polishing equipment to improve the surface of the stainless steel pipe smooth degree.
