LouisvilleGalvanized steel round pipeWide range of applications

Strictly feed Si Ca wire quantity to ensure effective & Omega in steel; When (CA) is about 0.002%, the inclusions can be fully denatured without generating more high melting point inclusions.

Solid bending, as the name suggests, is to compact the bending. During real bending,Louisville6-inch galvanized square pipe, the inner and outer rollers and the inner and outer walls of the pipe blank are compacted in both directions.

Louisville.Spraying (throwing) derusting spraying (throwing) derusting is that the high-power motor drives the spraying (throwing) blade to rotate at high speed, so that the steel sand, steel shot iron wire section, minerals and other abrasives can be sprayed (thrown) on the surface of the square tube under the action of centrifugal force, which can not only completely remove rust, oxides and dirt, but also the square tube under the violent impact and force of abrasives, It can also achieve the required uniform roughness.

The raw material for rolling square tube is round tube blank. For a long time, square tube, rectangular tube, seamless square tube, galvanized square tube and galvanized tube have complete products, and the blank with a growth of about 1m shall be brought to the furnace for heating. The billet is sent to the furnace for heating at a temperature of about 1200 degrees Celsius. The fuel is hydrogen or acetylene. The temperature in the furnace is the key problem. After the round tube billet is discharged from the furnace, it should be pierced through the pressure piercer. Generally the more common piercer is the conical roll piercer. This piercer has high production efficiency, good product quality, large perforation expansion and can wear a variety of steel grades.

.Should choose, in the end is galvanized or paint; For paint, it is recommended to match: epoxy zinc rich 50um + epoxy micaceous iron intermediate paint 80um + polyurethane finish paint 60um. In this way, according to the standard of iso12944, you can protect the indoor and outdoor environment for 10 years, which is not a big problem.

The common surface treatment of square pipe includes surface treatment, chemical treatment, shot blasting treatment, manual mechanical treatment and flame treatment. The treated will be separated. 4 ~ 6Mpa compressed air entrains abrasives, and the nozzle sprays to the steel surface at high speed. The impact and friction of abrasives remove the oxide scale, rust and dirt on the steel surface, and make the steel surface reach a certain roughness.

The banding caused by component segregation is difficult to be eliminated by heat treatment. Generally,Louisville125 galvanized welded pipe,LouisvilleGalvanized square pipe 100, normalizing can reduce this segregation to a certain extent. Generally, normalizing can correct the segregation to the allowable level. If the banding is serious, it can be improved by multiple normalizing. It is reliable to conduct high-temperature diffusion annealing first and then normalize again, which can completely eliminate the strip, but the cost will be very high, which is difficult to achieve for the steel plate due to the surface quality.

To sum up, improving the quality level of square tube is the key to ensure the service life of die. Therefore, when the economic cost and equipment conditions permit, including surface quality and internal quality, should be improved as much as possible by using more mature process measures.

B. converter steel: (a) acid converter steel; (b) Basic converter steel. Or (a) bottom blown converter steel; (b) Side blown converter steel; (c) Top blown converter steel.

It must be noted that in the overall process of square tube coating process, the cost of surface treatment is still relatively high, so it is very important to select appropriate treatment. Only by selecting the right treatment can the coating quality of square pipe be well guaranteed.

Management Department.After the sample is flattened to the specified flattening distance h, remove the load and remove the sample.

As for the color treatment technology of q355b square tube, the application of color q355b square tube treatment technology includes chemical method and electrochemical method from the process point of view. They can get different colors by treatment in specific electrolyte, so as to improve the wear resistance, color and variety of q355b square tube, which can be applied to different occasions and obtain different economic benefits.

When the square tube is covered, the surface of the square tube shall be ventilated to avoid the collection of water vapor on the surface due to difficult volatilization.

For seamless q355b square tubes there is a certain hardness, so there are still many for bearing in application, so it is necessary to test the mechanical properties of seamless q355b square tubes.

Pursuit of excellence.Square tubes can be degreased with organic solvents (vinyl chloride, vinyl chloride, carbon chloride, industrial solvents, benzene, acetone, etc.), which is suitable for manual scrubbing of the inner surface of the container with low degreasing requirements; 88% concentration, applicable to the concentration of some pipe fittings and porcelain rings of concentration device

Derusting: This is an important process for galvanized square pipes and components before coating, and it is the key to the quality of galvanized square pipes. Thorough derusting can improve the adhesion of antirust paint and prolong the service life of galvanized square pipe.

Performance index analysis of square tube - strength refers to the performance of metal materials under static load. Since the action modes of load include tension, compression, bending and shear, compressive strength, flexural strength and shear strength. There is often a certain between various strengths. Generally, tensile strength is used as the basic strength indicator.

Louisville.Material classification: square pipe is divided into ordinary carbon steel square pipe and low alloy square pipe.

Elongation after square tube breaking (& sigma;): in the tensile test the percentage of the length increased by the gauge length of the sample after breaking and the length of the original gauge length is called elongation. In & sigma; Expressed in%.

Solid bending, as the name suggests, is to compact the bending. During real bending, the inner and outer rollers and the inner and outer walls of the pipe blank are compacted in both directions.