San-RamonDN25 
NaranjoIs JDG Among them, q355b square tube is divided into process & mdash& mdash; Arc welded square pipe, resistance welded square pipe (high frequency and low frequency),EdmontonQ355d rectangular tube manufacturer,EdmontonPrice of galvanized 40 square pipe, spiral welded square pipe.
Preheating must be carried out before heat treatment of q355b square tube, so as to better ensure that there will be no many problems in the whole heat treatment process of q355b square tube, and the quality of q355b square tube will also be well guaranteed.
Edmonton.For improper stamping direction, simulation software shall be used in the initial stage of design to ensure that the direction of stamping parts is analyzed, the direction shall be adjusted to seamless square tubes. The square tube manufacturer introduces the forming, bending and bending of square tubes. As the name suggests,Edmonton35 square tube, the bending is compacted, and the inner and outer rollers are double with the inner and outer walls of tube billets during actual bending Compact towards the.
Low alloy steel is divided into q34 16Mn, Q390, St52-3, etc.
.The cutting surface of the square tube shall be true circle, and the cutting line shall be at right angles to the axis of the square tube. Excessive force is the reason for cutting the square tube into flat or oval, so the square tube should be cut with appropriate force.
It is recommended that the galvanized surface be primed with epoxy zinc yellow primer.
It is feasible to use the theory to calculate static structures, such as warehouses, but it is not suitable for moving components such as wheels. At this time, people often use the plastic theory. The research of the plastic theory can be traced back to 1914. In 1975, the European Design Association formulated a plastic design code, which is mainly used for static load plane beams and frame structures subjected to bending stress The solution is as follows: for high-rise buildings, more detailed calculations are needed.
At the same time, the heating temperature and heating time will also have a great impact on the performance of square tube. The heating of square tube blank is the key process to ensure that the square tube blank has enough plasticity and complete the smooth perforation. If the heating temperature is too high or the heating time is too long, the billet of the square tube will be burned and decarburized, and even the chemical composition of the square tube will be unqualified (unqualified carbon content) which is easy to cause batch quality problems and seriously affect the product qualification rate.
Pulling square tube: it is the process of pulling the die hole of the rolled metal blank (shape, tube, product, etc.) into a section to reduce the length and increase. It is mostly used for cold processing.
When the square tube is covered, the surface of the square tube shall be ventilated to avoid the collection of water vapor on the surface due to difficult volatilization.
Recommendation and consultation.Q355b square pipe for mining fluid transportation, Standard No.: gbt14291-2000. The representative material is Q235 grade B steel, which is mainly used for coal mine air pressure, drainage and vertical shaft gas drainage straight seam q355b square pipe.
Square pipe is the name of square pipe, that is steel pipe with equal side length. It is made of rolled strip steel after process treatment. Generally, the strip steel is unpacked, leveled, crimped and welded to form a round pipe, then rolled into a square pipe from the round pipe, and then cut into the required length. Usually 50 pieces per bag.
The surface hardening treatment of qq355b square tube is generally isothermal quenching, that is heat treatment technology. After isothermal quenching, qq355b square tube will obtain more and better properties, and make qq355b square tube be applied in more fields.
To sum up, improving the quality level of square tube is the key to ensure the service life of die. Therefore, when the economic cost and equipment conditions permit, the quality level of square tube, including surface quality and internal quality, should be improved as much as possible by using more mature process measures.
Convenient and efficient.When the square tube is processed, it needs to be properly polished to ensure durability, smoothness and. There are kinds of polishing for general stainless steel profiles, including mechanical polishing, chemical polishing and electrochemical polishing.
High quality steel (P & le; 0.035%, S & le; 0.030%)
Cutting: 1 to be fast, no teeth, or whether the cutting line is flat, the starch taste of oil affects the quality of dishes. First choose to cut potatoes with less sharp bottom, it's easy to leave the corner of the side end.
Edmonton.According to the welding specification, process test and process analysis, it is determined that the butt weld of Q345B square pipe adopts double-layer CO2 gas shielded welding. H08Mn2SiA, 2mm welding wire for welding material; The shielding gas is pure CO2 gas. The welding current of layer weld is 200 ~ 250A, and that of the second layer is 240 ~ 320A; The arc voltage is 24 ~ 26V. The process requirement is that the layer weld must be fully welded to ensure good back forming; The welding current, arc voltage, wire feeding speed and welding speed can be adjusted according to the equipment model.
The test can be carried out under cold and hot conditions. If the test temperature is not specified the test shall be carried out under normal temperature, but not lower than - 10 ℃.
Square tube is in our reality