Mercedes25 gal
HerediaDN25 gaQ355b square tube, the selected die material, has obvious hardening in the deep drawing process, resulting in many hard metal points, resulting in adhesion. Special products such as professional square tube, seamless square tube, galvanized square tube and galvanized tube are 20-year-old brands, with advantageous price and guaranteed quality. It makes the surface of workpiece and die easy to scratch and wear, so tool steel for general die can not be used.
It is learned from the authority that if there is dirt on the outer surface of the square pipe during degreasing, it can be washed with purified water and dried naturally, then soaked with degreasing agent with a dry cloth to remove the oil, the end of the pipe can be tightly blocked with a wooden plug or closed with other. The degreasing solvent with the volume of 15% - 20% of the pipe from the other end shall be sealed with a wooden plug, placed in a flat and clean place or on a workbench with sleepers for 60-80min, degreasing solvent shall be appropriately added to make it fully soaked. After degreasing,Mercedes25 hot dip galvanized pipe, pour out the solvent in the pipe, dry the pipe with exhaust fan, or dry it with oil-free compressed air or nitrogen, or dry it with natural air. Large diameter pipes can be manually scrubbed with cotton cloth dipped in solvent; The square tube can also be soaked in a long tank containing solvent for 60 to 80 minutes. The concentrated pipeline and equipment of the concentrated unit can be directly pumped and circulated with 88% concentrated for pickling after all installation. Pipes that cannot circulate or are not resistant to concentrated corrosion must be degreased separately.
Mercedes.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, 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.
You can really feel that the square tube is widely used in the development, and q355b square tube factory continues to extend in the technical level, which makes the current square tube develop more widely.
.From the perspective of production, we should give full play to the productivity of production equipment and reduce the consumption of fuel and equipment on the basis of meeting the size and performance requirements of q355b square tube. Therefore, the temperature of no open forging and final forging is a comprehensive technical and economic problem. If qualified q355b square tubes can be obtained in the temperature range of the vehicle,MercedesThin walled rectangular tube, reasonable process procedures should be selected from an economic point of view. Obviously, the higher the temperature, the easier the forging and the higher the productivity but the greater the fuel consumption and the loss of the heating furnace; We should consider these two aspects and make a reasonable choice.
High hardness square tubes mainly bear fatigue load, so they must have high hardness. Therefore, quenching, surface quenching or chemical heat treatment shall be carried out, followed by low-temperature tempering treatment.
Square tubes are more and more widely used in practice. Different types of square tubes have different characteristics, and the performance of each type of square tube is also different. Choose according to its performance in different aspects, so as to improve its work efficiency. Next, let's introduce what should be paid attention to when heating the lower tube.
In order to ensure the stability of the perforation performance and chemical properties of the billet of the square tube the technical regulations shall be strictly implemented in the operation of the circular furnace,MercedesDN25 hot dip galvanized pipe, the operation of the heating furnace shall be frequently, the abnormal conditions shall be handled in time and recorded, and the follow-up posts and quality management department shall be notified in time for handling.
Zinc layer thickness: there is a great difference between cold galvanized square pipe and hot galvanized square pipe in galvanizing process; Cold galvanized square pipes are prone to & ldquo; Electric burning & rdquo; The color of this part is gray and the zinc layer is thick. It is easy to form a current dead angle at the corner resulting in an under current area. The zinc layer at this part is thin, and there is no zinc layer attached to the cold galvanized square pipe. The cold galvanized square pipe has no zinc lump and caking as a whole, but the overall zinc layer is thin, and the thickness of the outer wall zinc layer is 5μ m-10μ m. The and outer walls of the hot-dip galvanized square tube are attached with zinc layer, and there will be water marks and a few zinc tumors, but the overall zinc layer is thick, and the thickness of the zinc layer on the inner and outer walls of the square tube is 70-mu; M above. The nature of Q345B square tube!
The service life has a great impact on the isotropic performance of the square tube. The use of secondary refining technology (including vacuum refining, ESR and ladle powder spraying) can improve the purity of the square tube, which is beneficial to improve the performance.
Customer first.Upper yield point (& sigma; Su): the large stress before the yield of the sample occurs and the stress decreases for the first time; Lower yield point (& sigma; SL): the small stress in the yield stage when the initial instantaneous effect is not considered.
It is a kind of cleaning for the surface of square pipe. Shot blasting is often used to clean the casting surface or strengthen the surface of square pipe.
Square pipe, the steel pipe whose ratio of outer diameter to wall thickness is less than 20 is called square pipe. At present, the square tubes produced by q355b square tube factory are mainly used in tap water engineering petrochemical industry, chemical industry, electric power industry, agricultural irrigation and urban construction. For transportation: water supply and drainage. For gas transmission: gas, steam and liquefied petroleum gas. do
Square pipe, the steel pipe whose ratio of outer diameter to wall thickness is less than 20 is called square pipe. At present, the square tubes produced by q355b square tube factory are mainly used in tap water engineering, petrochemical industry, chemical industry, electric power industry, agricultural irrigation and urban construction. For transportation: water supply and drainage. For gas transmission: gas, the head and root of each batch of square tube shall be subject to strict first inspection. The mechanical properties, chemical composition, fusion condition, surface quality of square tube and NDT shall be carried out to ensure that the pipe making process is qualified before it can be officially put into production.
For oil, the oil brush work shall be carried out in accordance with the requirements of the rule system, so as to ensure the oil brush and the oil in the correct position of the brush and avoid wrinkles.
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, so when you cut, it's easy to leave the corner of the side end.
Mercedes.Square tube with complex section: flower shaped square tube, open square tube, corrugated square tube and special-shaped square tube.
The welded joints of square pipes are subject to on-line continuous ultrasonic automatic flaw detector to ensure the NDT coverage of spiral welds. If there are defects it will automatically alarm and spray marks. The production will adjust the process parameters at any time to eliminate the defects in time.
In the trend of the times, we will change with the changes of the times, so that the square tube can be used more widely. In our daily life, we will the use of the square tube, so that we can use the square tube more in future production. Next, let's introduce the difference between carbon steel and square tube.