Qian'an large diameter square tube manufacturer directly supplies the manufacturer
Square tubes are divided into plain carbon steel square tubes and low-alloy square tubes according to their materials. 1. Ordinary carbon steel is divided into Q195, Q215, Q235, SS400, 20 # steel, 45 # steel, etc. 2. Low alloy steels include Q345, 16Mn, Q390, ST52-3, etc. According to consumption specifications, the square tube can be divided into: 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. The square tubes are classified according to the section shape: 1. Simple section square tubes: square square tubes, rectangular square tubes. 2. Complex cross-section square tube: flower shaped square tube, tooth shaped square tube, corrugated square tube, special-shaped square tube. Square tubes are divided into hot-dip galvanized square tubes, electrogalvanized square tubes, oiled square tubes and pickled square tubes according to their appearance. Square pipes are classified according to their uses: square pipes for decoration, machine tool equipment, machinery industry, chemical industry, steel structure, shipbuilding, automobile, steel beam and column, and special pipes. Square and rectangular tubes are classified according to wall thickness: extra thick square and rectangular tubes, thick square and rectangular tubes and thin-walled square and rectangular tubes.
Qian'an large diameter square tube manufacturer directly supplies the manufacturer
Consumption and manufacturing methods: ① The operating temperature of ordinary boiler tubes is below 450 ℃, and domestic tubes are mainly made of No. 10 and No. 20 carbon bonded steel hot-rolled tubes or cold drawn tubes. ② High pressure boiler tubes are often in high temperature and high pressure conditions when they are used. Under the action of high-temperature flue gas and water vapor, the tubes will be oxidized and corroded. The steel pipe is required to have high durability, high oxidation and corrosion resistance, and good organizational stability.
Qian'an large diameter square tube manufacturer directly supplies the manufacturer
1. Performance index analysis of rectangular tube - plasticity: plasticity refers to the ability of metal materials to produce plastic deformation (permanent deformation) without destruction under load. 2. Analysis of performance index of rectangular tube - hardness: hardness is a pointer to weigh the soft and hard level of metal data. At present, the commonly used method for measuring hardness in consumption is the indentation hardness method, which uses an indenter of geometric shape to press into the surface of the metal data to be tested under load, and determines the hardness value according to the indentation level. 3. Performance index analysis of rectangular tube - fatigue: the strength, plasticity and hardness discussed above are all mechanical performance indicators of metal under static load.
Qian'an large diameter square tube manufacturer directly supplies the manufacturer
During the installation, the axis lines of the fixed and moving pipes should be in a straight line, otherwise the rubber ring will be easily pushed out, affecting the quality and speed of the device. The Q345 seamless rectangular tube device should be flat, and the Q345 seamless rectangular tubes should be in a straight line. Pay attention to the inclination angle. Align the interface connecting Q345 seamless rectangular pipe with the socket. If the insertion resistance is too large, do not force the insertion to prevent the rubber ring from twisting. Vegetable oil should be used as the smooth oil of rubber ring; In cold winter, the rubber ring can be preheated with hot water to reduce hardness and speed the device.
Qian'an large diameter square tube manufacturer directly supplies the manufacturer
The billet of square tube is a necessary raw material for square tube consumption. When the bending degree exceeds the specification requirements, the billet of square tube is easy to cause the piercer to roll and jam, which is easy to form uneven wall thickness of perforated blank. It is necessary to strictly implement the billet acceptance system of square tube and the billet sawing system of square tube. It is necessary to timely inspect the necessary raw materials of the consumption square tube with the incoming materials and deal with the problems found in a timely manner, which will not only affect the normal perforation structure adjustment of the piercer, but also affect the dimensional accuracy of the entire square tube.
Qian'an large diameter square tube manufacturer directly supplies the manufacturer
Fine tube is a type of steel tube with a higher degree of fineness than steel tube, and its use is also very common. In particular, various properties and uses of fine tube are relatively important manifestations of fine tube. If fine tube is not used, it is necessary to understand the nature and use of fine tube in all aspects, so as to achieve reasonable use of fine tube. Fine tube is a special condition of steel pipe and also a good steel. It can be said that the material of fine tube is also quite special, and its application volume and market prospect are relatively large. Fine tube is a kind of high-precision steel tube material after cold drawing or hot rolling. Fine steel pipes are mainly used to consume products of pneumatic or hydraulic components, such as air cylinders or oil cylinders, which can be seamless pipes or welded pipes, because they have no oxide layer on the inner and outer walls, can accept high pressure without leakage, high precision, high brightness, cold bending without deformation, flaring, flattening without cracks, etc. The chemical composition of fine steel pipe includes carbon C, silicon Si, manganese Mn, sulfur S, phosphorus P and chromium Cr.
