Normalized: A. pearlite steel; b. Bainitic steel; c. Martensitic steel; d. Austenitic steel.
Stage ( & mdash; )
PetrikovSquare tubes can be degreased with organic solvents (vinyl chloride， carbon chloride， industrial solvents， benzene， acetone， etc.)， concentrated or alkaline solution. Industrial vinyl chloride is suitable for degreasing metal parts; Industrial chlorinated carbon is suitable for degreasing ferrous metal and non-metallic parts; Vinyl chloride is suitable for degreasing metal parts and non-ferrous metal parts; The industrial concentration shall not be less than %， which is suitable for manual scrubbing of the inner surface of the container with low degreasing requirements; % concentrated， which places metal in a closed Jane and applies pressure at the end to extrude the metal from the specified die hole to obtain finished products with the same shape and size. It is mostly used to produce non-ferrous metal materials. Square tube ferrous metal， steel and non-ferrous metal. Before introducing the classification of steel， square tube steel and non-ferrous metal.
According to metallographic classification the annealed state of square tube: A. hypoeutectoid steel (ferrite + pearlite); b. Eutectoid steel (pearlite); c. Steel precipitation through a common square tube (pearlite + cementite); d. Ledeburite steel (pearlite + cementite).
We all know very well. Therefore， the quality of square tubes will directly affect the development of the construction industry. What if we can make the service life of square tubes longer? Here， we also need to ask the personnel of the square tube manufacturer for instructions， and use ingenious methods to prolong the service life of the square tube， so that the square tube can bring us greater help in life.
After chemical pickling， the square tube can be well protected by electrolysis. These are simple ways to prolong the service life of the square tube，PetrikovGalvanized round pipe company， We only need to treat according to these， so that the square tube can bring us great help in the use process. The cold galvanized square tube is the principle of cold galvanizing on the square tube used to make the square tube have corrosion performance. Different from hot-dip galvanizing， cold galvanizing coating is mainly carried out according to the electrochemical principle. Therefore， it is necessary to ensure the sufficient of zinc powder and steel， resulting in electrode potential difference，PetrikovHow much is a meter of galvanized round pipe， so the steel surface treatment requirements are very high.
The iron filings and burrs on the cutting section shall be completely removed with a file or appropriate tools to prevent the iron filings and burrs from scratching the rubber O-ring and other accessories when connecting another part.
Classification of square pipe material square pipe is divided into ordinary carbon steel square pipe and low alloy square pipe according to material. Ordinary carbon steel is divided into Q Q q SS， # steel， # steel， etc; Low alloy steels are divided into q Mn， Q， St-， etc.
Encyclopedic knowledgeAfter chemical pickling， the square tube can be well protected by electrolysis. These are simple ways to prolong the service life of the square tube We only need to treat according to these， so that the square tube can bring us great help in the use process. The cold galvanized square tube is the principle of cold galvanizing on the square tube used to make the square tube have corrosion performance. Different from hot-dip galvanizing cold galvanizing coating is mainly carried out according to the electrochemical principle. Therefore， it is necessary to ensure the sufficient of zinc powder and steel， resulting in electrode potential difference， so the steel surface treatment requirements are very high.
Strength QB square strength refers to the performance of metal materials under static load (excessive plastic deformation or fracture). Since the action modes of load include tension， compression， bending and shear， the strength is also divided into tensile strength， compressive strength， tensile strength is used as the basic strength indicator. Precision pipe is a seamless pipe with high dimensional accuracy and good surface finish for mechanical structure and hydraulic equipment. The selection of precision seamless mechanical structure or hydraulic equipment can greatly save machining hours， improve material rate and improve product quality. Seamless pipe is rolled in the annular pass composed of variable cross-section circular hole groove and fixed conical plug. Cold drawing is usually carried out on single chain or double chain cold drawing machine. This method is to put the heated pipe blank in a closed cylinder， and the perforated rod and rod move to extrude the part from the smaller die hole. This method can produce steel pipe with smaller diameter.
Pull square tube:
Change to square pipe: 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. Stage ( & mdash; )
retailerSo flat， and the size and thickness are not standardized， it can reflect that this square tube is a poor product& rdquo;
Now stainless steel is gradually replacing pure iron products in our life， and now the steel pipe is also gradually innovated. Now the qb square pipe is a typical representative. However， the above small series are not the focus. Today， the focus is on the analytical process of qb square tube sizing rolling.
Hardness hardness is a pointer to measure the hardness and softness of metal materials. At present the hardness method is commonly used to measure the hardness in production. It uses the indenter with fixed geometry to measure the hardness value of the metal material surface tested under fixed load according to the degree of hardness.
PetrikovQb square tube， qb square tube， qb square tube， QB square tube， QB square tube and hot-rolled right angle square tube are of good quality and excellent quality. We have become a supplier of many enterprises. Qb square tube and I-beam are two products with different shapes. Under the condition of the same material，PetrikovWhat kind of galvanized pipe is 32， the bearing capacity of steel is the same， but their uses are very different. The shape is different. Qb square tube is a cuboid， and I-beam is in I-shape. The purpose is different. I-beam can be used as span and support. Square pipe is a little worse than span. It is no problem to do support. However， the specific selection of steel depends on the requirements of the project. Square tube practical application square tube for structure (gbt-) is a square tube for general structure and mechanical structure.
With the progress of the times and the development of science and technology， the application fields of square tubes are widely divided. The main fields are the construction industry. Affected by the environment and weather， square tubes will also rust for a long time. How to improve the rust resistance of square tubes and what are its rust resistance? Let me give you a detailed introduction below.
Cold drawn or cold rolled precision square tube (gb-) is a cold drawn or cold rolled precision square tube with high dimensional accuracy and good surface finish for mechanical structure and hydraulic equipment. The selection of precision square mechanical structure or hydraulic equipment can greatly save machining hours， improve material rate and improve product quality.
