Welding Points and Precautions of Stainless Steel

posted on 29 Sep 2016 12:12 by qzz10011

Welding Points and Precautions of Stainless Steel First, the vertical characteristics of the power supply, DC using a positive polarity (wire connected to the negative) 1, generally suitable for the following sheet of 6mm welding, welding with beautiful appearance, the characteristics of small welding deformation. 2, the protective gas is argon, the purity is 99.99%. When the welding current is 50 ~ 150A, argon flow rate of 8 ~ 10L / min, when the current is 150 ~ 250A, argon flow rate of 12 ~ 15L / min.type 304 type 316 stainless steel 3, the length of the tungsten protruding from the gas nozzle to 4 ~ 5mm better in the fillet welding and other shielding poor place 2 ~ 3mm, in the slot deep place is 5 ~ 6mm, the nozzle to the work of the general distance of not more than 15mm . 4, in order to prevent the emergence of welding stomata, welding parts such as rust, oil, etc. must be clean.

  • Stainless Steel Bar Manufacturers 5, the welding arc length, welding ordinary steel to 2 ~ 4mm is better, and welding stainless steel to 1 ~ 3mm good, too long to protect the effect is not good. 6, butt backing, in order to prevent the back of the bottom of the bead is oxidized, the back also need to implement gas protection.
  • Hot rolled stainless steel coil 7, in order to argon gas well to protect the welding pool, and to facilitate the welding operation, the tungsten center line and welding parts should generally maintain 80 ~ 85 ° angle, filler wire and the workpiece surface angle should be as small as possible, Generally about 10 °. 8, wind and ventilation. Where there is wind, please take measures to block the network, and in the room should take appropriate ventilation measures.
  • 310S stainless steel bar

 

Sanitary stainless steel tube heat treatment

posted on 02 Sep 2016 08:41 by qzz10011

Sanitary stainless steel tube heat treatment can be divided into two categories, namely, final heat treatment and heat treatment in order to meet sanitary stainless steel tube manufacturing process product performance requirements in between processes.stainless steel grade 304 properties

Other products, according to the technical requirements of product standards, sanitary stainless steel pipe commonly used heat treatment process mainly quenching, tempering, annealing and normalizing. For example: in the OCTG casing, tubing, drill pipe, line pipe, etc., according to the grade level of the corresponding normalizing, normalizing plus tempering, quenching and tempering (quenching) process; high-pressure boiler tube , high pressure chemical fertilizer pipe usually normalized, normalized and tempered, quenched and tempered (thick-walled tubes) and austenitic stainless steel sanitary pipe solution treatment; bearing ball sanitary stainless steel tube annealing, etc. .Stainless steel angle bar for sale

For heat treatment step between cold-rolled, cold-drawn production process sanitary stainless steel tube, usually recrystallization annealing, softening annealing. The aim of eliminating work hardening effect, reduce the hardness and improve ductility in order to facilitate further cold deformation process to be implemented.303 Stainless Steel Threaded Rod

edit @ 2 Sep 2016 08:43:08 by qzz10011

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