Huludao large diameter rectangular tube wholesale manufacturer
Square tube is a kind of tube that we have used a lot in recent years, so we would like to know how this kind of tube can be used in our life? Let's briefly introduce the role of this pipe in our life. Square tube is a special tube with hollow cross section. It is precisely for this special design that the application of this tube in our life has been expanded a lot. Especially in our shipbuilding and construction industries, as well as in the military and aviation fields, there has been a great expansion. The main function is to improve the service life and anti-corrosion performance of square tubes, which also makes the performance of square tubes further improved, and the quality and price of square tubes are directly affected by the good or bad layer. Assuming that to improve the quality of the pipe, it is necessary to reduce the iron content in the zinc liquid by reducing the zinc slag, that is, to reduce the factors of iron dissolution. This ability can form a better layer on the surface of our square pipes, and it is also because of this that our pipe manufacturers have a big direction to transform this kind of pipe.
Huludao large diameter rectangular tube wholesale manufacturer
Seamless rectangular tube is a kind of long steel with hollow section and no seam around. The inside of the pipe is hollow and has a set cross sectional area. A large number of pipes are used to guide fluid, such as pipes for oil, natural gas, gas, water and some solid materials. When the ring section bears internal or external radial pressure, the force is relatively uniform. Therefore, most steel pipes are round pipes. However, circular pipes also have limitations. For example, under the condition of plane bending, circular pipes are not as strong as square and rectangular pipes in bending strength. Square and rectangular pipes are commonly used for some agricultural machinery frameworks, steel and wood furniture, etc.
Huludao large diameter rectangular tube wholesale 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.
Huludao large diameter rectangular tube wholesale manufacturer
1. Cooling curve of heat treatment. The heat treatment processing process generally includes three whole processes: heating, thermal insulation and refrigeration, in which heating is to change the ferrite to austenitic stainless steel, thermal insulation and insulation is to stainless steel the austenite, and the seamless square tube refrigeration method is different due to different processing technologies. The current situation of rectangular tube market products is mainly to dominate the refrigeration rate, Due to different cooling rates, they change into ferrite, martensite, austenite or mixed structure. 2. Ideal heat treatment mode. According to the regularity of steel refrigeration change, when waiting for the temperature in the critical value area, the refrigeration rate is high. According to the nose area of the C curve as soon as possible to prevent the transformation into ferrite or martensite mechanism. In the risk area where the austenite change is just beginning, the refrigeration rate must become slower to reduce the deformation or crack caused by the stress of the mechanism due to the mechanism change. 3. Cooling curve of quenching oil. The heat treatment quenching oil must have the said refrigeration characteristics. The seamless square tube has a faster refrigeration speed for parts at the temperature of the critical value area, and a slower refrigeration speed for parts at the temperature of the risk area. 4. Strength rules and deformation hazards. The critical value of different raw materials is different in the cooling rate, and the strength rules of the parts are also different when they are applied. The fineness of the current parts in the square tube market is also different in the rules governing deformation. Therefore, it is necessary to select quenching oil with moderate cooling rate according to the details of the strength rules and the consumption process rules governing deformation. 5. Selection of quenching oil for heat treatment of seamless square tube. The selection specification of quenching oil was mentioned from the consideration of heat treatment and heat treatment process: the cooling characteristics of quenching oil must meet the requirements of regular strength and no cracks are allowed to form, and the deformation governing heat treatment should find a very good blend between each other within the effective small range, and this divergent cooling rate rule is a rule clearly proposed for different temperature sections, This shows an orientation for the research and development of heat treatment quenching oil.
