Datong medium thick wall square tube wholesale direct production
Due to the different properties of seamless square and rectangular tubes, the behaviors reflected by the data are different; The mechanical performance indicators are all performance indicators under the static seamless square tube. Whether in the static tensile test or hardness test, the seamless square tube is slowly added to the sample or workpiece. However, in consumption practice, many workpieces accept the impact of seamless rectangular tubes, that is, seamless rectangular tubes act on workpieces at a great speed, such as the hook between train carriages when the train starts or stops. When the gear is shifting; The seamless square and rectangular tubes that the forging die and the stamping die are subjected to when they are working belong to this category. The difference between the impact seamless square tube and the static load is that the static load is simply the function of force, while the impact seamless square tube has the speed problem of force besides the function of force. Since it is extremely complicated to measure the impact stress on the workpiece under the impact seamless rectangular tube, it is convenient to think about the problem from the concept of energy, so the impact seamless rectangular tube can be regarded as an energy seamless rectangular tube. Due to the different nature of seamless square tube, the behavior reflected by the data is also different. The deformation and destruction process of the data under the impact of seamless rectangular tube is still elastic deformation, elastic seamless rectangular tube deformation and fracture, but the loading speed has a great influence on these three stages, especially the deformation of seamless rectangular tube. Due to the demand time for seamless rectangular tube deformation after the data is stressed, the deformation of seamless rectangular tube in the data may not be carried out in time with the increase of loading speed, which is manifested in the fall of deformation ability of seamless rectangular tube in the data and the increase of deformation resistance of micro seamless rectangular tube such as elastic limit and yield limit. Secondly, under the impact of the seamless square tube, the uneven or partial deformation of the plastic matrix of the data is more prominent than that under the static load. The deformation of the seamless square tube is likely to be limited to a small range, and it will lead to cracks and fractures here. This uneven deformation of the seamless square tube further limits the development of the deformation of the seamless square tube of the data. Therefore, in general, the impact seamless rectangular tube has a tendency to promote data embrittlement. The data with large deformation ability of seamless rectangular tube under static load may become very small and brittle under impact of seamless rectangular tube.
Datong medium thick wall square tube wholesale direct production
There are more and more manufacturers of seamless square and rectangular tubes. The demand and market sales are accumulated day by day, which means that the manufacture of seamless square and rectangular tubes is stopped by virtue of many advantages and characteristics of seamless square and rectangular tubes. Seamless square and rectangular tubes can be said to be icing on the cake in terms of processing technology and manufacturing process. The wear resistance and ductility of the process are relatively good. The products manufactured are smooth in appearance and superior in performance! The seamless square and rectangular tube has good strength, toughness, plasticity, welding and other process properties, and has good ductility. Its alloy layer is firmly attached to the steel base. Therefore, the seamless square and rectangular tube can stop cold punching, rolling, wire drawing bending and other forming without damaging the coating. It is suitable for ordinary processing such as drilling, cutting, welding, cold bending and other processes. The seamless rectangular tube after hot galvanizing has a bright and beautiful appearance. Seamless square and rectangular tube can be divided into seamless tube and welded tube. Seamless square and rectangular tube is extruded from seamless round tube. Generally, it can be selected and used according to detailed requirements. Due to its excellent performance, seamless rectangular tubes are widely used in such aspects as glass curtain walls, power towers, communication networks, water and gas escorts, wire casings, houses, bridges, metal structures, etc.
Datong medium thick wall square tube wholesale direct production
（1） The dimensional stability is related to the high-precision rectangular tube, which requires high precision, so it is necessary to adhere to the dimensional stability. Since the straightening is stopped in the air and the cooling speed is slow, it has a stabilizing effect on austenite, which will increase the number of the remaining austenitic rectangular tubes in the structure, so cold treatment must be stopped; （2） Reduce quenching deformation Due to the slender rectangular tube, it is easy to deform during quenching, so it is necessary to strictly control its deformation. Heat treatment is a very critical process. In the process of quenching and cooling, the plastic stop of undercooled austenite should be used for timely straightening, which is a key step to ensure the progress of its qualification rate, For this reason, stop hot bath quenching or propose hot straightening after cooling time in oil. At the same time, stop hanging heating during heating to reduce quenching deformation. For high-precision guide rails, stop gas nitriding or ion nitriding to reduce deformation; （3） High hardness square and rectangular tubes mainly accept contact fatigue load, so they must have high hardness. Therefore, quenching, surface quenching or chemical heat treatment should be stopped, and then low-temperature tempering treatment should be stopped.
Datong medium thick wall square tube wholesale direct production
1. Seamless square tube electrochemical coloring method: refers to the color of the film formed by electrochemical oxidation in a specific solution. 2. High temperature oxidation coloring method: immerse the workpiece in a specific molten salt and adhere to the corresponding process parameters, so that the profiled tube can form a certain thickness of oxide film and show various colors. 3. Chemical oxidation coloring method: refers to the color of the film formed by chemical oxidation in a specific solution, including salt method, mixed sodium salt method, sulfuration method, acid oxidation method and alkaline oxidation method. The common bacteriological method is widely used, but to ensure the color difference of a batch of products, reference electrodes must be used for control. 4. Gas phase cracking coloring method: it is relatively complex, and is rarely used in the industrial consumption of seamless square tubes. 5. Chemical method of ion stacking oxide coloring method: put the stainless steel seamless square tube in the vacuum coating machine to stop vacuum evaporation coating. This method is suitable for processing large quantities of products because of its large investment and high cost.
