PortlandPrice of galvanized rectangular pipeWhat are the requirements for question handling

The modification of Ca, rare earth and other trace elements on inclusions changes the structure, morphology and physical properties of inclusions in steel, spheroidize and refine inclusions in steel, so as to improve the mechanical properties of square tubes.

Square tube is the main type of square tube. It is also very popular in the square tube market. There are many people doing this kind of thing, so there are many in the competition. The future market potential is huge. We should grasp this information well. In addition, we must learn about relevant maintenance and repair!

Portland.Large diameter q355b square tube production standard classification square tube is divided according to production standard: national standard square tube, Japanese standard square tube, British standard square tube, American standard square tube, European standard square tube and non-standard square tube.

Stainless steel q355b square pipe for fluid transportation, Standard No.: gbt12771-1991. The representative materials are 0Cr 0cr19ni 00cr19ni 00cr1 0cr18ni11nb, etc., which are mainly used to transport low-pressure corrosive media.

.Material classification: square pipe is divided into ordinary carbon steel square pipe and low alloy square pipe.

Dimensional stability for high-precision square tubes, the required accuracy is high, so the dimensional stability must be maintained. Due to straightening in the air and slow cooling speed, it has the effect of stabilization and will increase the number of residual square tubes in the, so it must be cooled; Reduce quenching deformation because the square tube is slender, it is easy to deform during quenching,PortlandWill galvanized pipes rust, so its deformation must be strictly controlled. Heat treatment is a key process. In the process of quenching and cooling the cold plasticity shall be corrected in time, which is a key step to ensure the improvement of its qualification rate. Therefore, hot bath quenching or cooling in oil for a fixed time shall be carried out to propose thermal correction.

As for the color treatment technology of q355b square tube, so as to improve the wear resistance, color and variety of q355b square tube, which can be applied to different occasions and obtain different economic benefits.

At the same time, hanging heating shall be carried out during heating to reduce quenching deformation. For high-precision guide rail, gas nitriding or ion nitriding shall be carried out to reduce deformation; Square tubes have outstanding performance in all aspects of performance. We will also test them in this regard when making square tubes more durable. What outstanding performance do square tubes have in mechanical properties? Next, I'll introduce it to you.

The pipeline is only subject to chemical pickling, which can remove oxide scale rust and old coating. Sometimes it can be used as the reprocessing after sand blasting. Although chemical cleaning can make the surface reach a certain cleanliness and roughness, its anchor lines are shallow and easy to pollute the surrounding environment. The square tube shall be submitted for acceptance in batches, and the batch rules shall comply with the provisions of corresponding product standards.

Good quality.Today, with the development of the world, all fields are coming rapidly, and the requirements of customers for square tube higher and higher. Now we are studying a new square tube. The following mainly introduces the performance of square tube in tensile strength.

When we understand the causes of defects in the drawing process of q355b square tube, we should constantly improve the technology in the subsequent production process, so that we can reduce the occurrence of defects.

High productivity of square tube: the efficiency of cold production of mechanical parts is very high, especially for parts with large batch. Cold production can be several times, several times or even hundreds of times higher than cutting. For example, the use of cold pin for automobile is twice higher than that of cutting. At present, cold pin automata is used to improve productivity. The productivity of table cooling automata is equivalent to that of 100 ordinary lathes or 10 shaft self-propelled machines.

The modification of Ca, rare earth and other trace elements on inclusions changes the structure, morphology and physical properties of inclusions in steel, spheroidize and refine inclusions in steel, so as to improve the mechanical properties of square tubes.

Total quality management.High productivity of square tube: the efficiency of cold production of mechanical parts is very high, especially for parts with large batch. Cold production can be several times, several times or even hundreds of times higher than cutting. For example, cold pin automata is used to improve productivity. The productivity of table cooling automata is equivalent to that of 100 ordinary lathes or 10 shaft self-propelled machines.

If the re inspection results are unqualified (including the items whose preliminary inspection results are unqualified and re inspection is not allowed), the supplier can submit them for acceptance one by one; Or re conduct heat treatment (the number of RE heat treatment shall not exceed times), and propose acceptance with a new batch.

The modification of Ca,PortlandStrength of galvanized square pipe,PortlandGalvanized square pipe manufacturing, rare earth and other trace elements on inclusions changes the structure, morphology and physical properties of inclusions in steel, spheroidize and refine inclusions in steel, so as to improve the mechanical properties of square tubes.

Portland.The general delivery length of q355b square pipe is 4000mm-12000mm mostly 6000mm and 12000mm. Q355b square tube is allowed to deliver short and non fixed length products not less than 2000mm, or in the form of interface tube, but the Demander shall cut off the interface tube when using it. The weight of short length and non fixed length products shall not exceed 5% of the total delivery. For q355b square tube with theoretical weight greater than 20kgm it shall not exceed 10% of the total delivery. The bending degree of q355b square tube shall not be greater than 2mm per meter, and the total bending degree shall not be greater than 0.2% of the total length. The square tube is classified according to the production process: hot rolled seamless square tube, cold drawn seamless square tube, seamless square tube and square tube.

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.