TampaHeat zinc square tubeWhat are the reasons for the trip fault

Performance index analysis of square tube - impact toughness the load acting on the part at a great speed is called impact load, and the ability of metal under impact load is called impact toughness.

General shot blasting is used for square tube with regular shape. Several polishing heads are up, down, left and right, with high efficiency and little pollution.

Tampa.Section shape classification of large-diameter q355b square tube square tube is classified according to section shape: simple section square tube & mdash& mdash; Square tube, rectangular tube and complex section square tube & mdash& mdash; Flower shaped square pipe,Tampa200 galvanized pipe, open square pipe, corrugated square pipe, special-shaped square pipe, large-diameter q355b square pipe surface treatment classification square pipe is divided according to surface treatment: hot-dip galvanized square pipe, electro galvanized square pipe, oil coated square pipe, acid pickling square pipe, large-diameter q355b square pipe purpose classification square pipe is classified according to purpose & mdash& mdash; Square tubes for decoration, machine tool equipment, machinery industry, chemical industry steel structure, steel beam and column, special purpose, large-diameter q355b square tube wall thickness classification,TampaSpecification of galvanized pipe, large-diameter q355b square tube according to wall thickness Classification & mdash& mdash; Super large diameter q355b square pipe, large diameter q355b square pipe and thin-wall large diameter q355b square pipe rectangular pipe are the names of square pipe and Q345B square pipe, that is, steel pipe with equal side length. It is made of rolled strip steel after process treatment. Generally, the strip steel is unpacked leveled, crimped and welded to form a round pipe, then rolled into a square pipe from the round pipe, and then cut into the required length. Usually 50 pieces per bag. Q355b square pipe, also known as square and rectangular cold-formed hollow section steel, is referred to as square pipe and rectangular pipe, code f and j respectively. The allowable deviation of wall thickness of q355b square pipe shall not exceed plus or minus 10% of nominal wall thickness when the wall thickness is not greater than 10mm plus or minus 8% of wall thickness when the wall thickness is greater than 10mm, except for the wall thickness of corner and welding joint area.

Now stainless steel is gradually replacing pure iron products in our life, and now the steel pipe is also gradually innovated. Now the q355b square pipe is a typical representative. However, the above small series are not the focus. Today, the focus is on the analytical process of q355b square tube sizing rolling.

.Common specifications of square tube: ~ 5 18 & times; 18× 0.4～ 5 20× 20× 0.4～ 5 25× 25× 0.6～ 0 30× 30× 0.6～ 0 34× 34×0～ 0 35× 35×0～ 0 38× 38×0～ 0 40× 40×0～ 5 44× 44×0～ 5 45× 45×0～ 0 50× 50×0～ 0 60× 60×5～ 0 70× 70×0～ 0 75× 75×0～ 0 80× 80×0～ 0 85× 85×0～ 0 95× 95×0～ 0 100× 100×0～ 0 120× 120×0～ 0 150× 150×0～ 0 180× 180×0～

Square tube flattening test is a kind of test to check the deformation performance of metal tubes (seamless square tubes and rectangular tubes) flattened to the specified size and show their defects. Relevant flattening tests shall be carried out in accordance with relevant provisions of test standards. Requirements for samples samples can be taken from metal pipes with qualified appearance. Generally, sawing is adopted. The inner and outer walls of the pipe shall retain the original surface without any processing. Sample length L & asymp; D (D is the outer diameter of the pipe). When the outer diameter is large,TampaHow much is square tube galvanizing per ton, the length l shall not exceed 100mm. When the outer diameter is less than 20mm l = 20mm. When cutting the sample, the surface of the sample shall not be damaged and the performance of the metal shall not be changed due to heating or cold processing. The edge of the section shall be flattened. The flattening test is a test to check the deformation performance of the metal pipe (seamless square pipe and rectangular pipe) flattened to the specified size and show its defects. Relevant flattening tests shall be carried out in accordance with relevant provisions of test standards.

The q355b square tube rolled from the strip steel through process treatment is generally to unpack, flatten, curl and weld the strip steel to form a round tube, then roll the round tube into a square tube, and then cut it to the required length. Nowadays, and the total bending degree shall not be greater than the actual bending of the total length. As the name suggests, the bending is compacted, and the internal and external rollers and the internal and external walls of the tube blank are compacted in both directions during the actual bending.

Functional index analysis of square tube - commonly used are square tube Brinell angle (HB), Rockwell angle (HRC) and Vickers angle (HV). Angle is a gauge needle to weigh the soft and hard level of metal data. The angle method is rarely used to determine the internal angle in the current life. It uses the metal data surface tested under the fixed load of the indenter with a certain number and shape to determine its angle value according to the level of the object.

Steel used & mdash& mdash; Such as bridge steel, ship steel, boiler steel, pressure vessel steel, agricultural machinery steel, solar energy equipment, steel structure, automobile parts, guardrail and ship internal structure.

Where is good.Sample length L & asymp; D (D is the outer diameter of the pipe). When the outer diameter is large, the length l shall not exceed 100mm. When the outer diameter is less than 20mm, l = 20mm.

Degrease.

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, the quality level of square tube, including surface quality and internal quality, should be improved as much as possible by using more mature process measures.

After RH treatment, the molten steel should be fed with Si Ca line when the molten steel temperature is high. At this time, calcium treatment can reduce sulfur segregation in the later solidification process.

How much does it cost?.Among them, q355b square tube is divided into process & mdash& mdash; Arc welded square pipe, resistance welded square pipe (high frequency and low frequency), gas welded square pipe and furnace welded square pipe are divided by weld & mdash& mdash; Straight seam welded square pipe, spiral welded square pipe.

It should be noted that the position of the disc from the calibration line can be adjusted according to the reinforcement diameter, and R1 and R2 can be equal or different.

It is forbidden to degrease the oil square pipes and pipe fittings in the direct production concentration unit, air separation unit, oil refining and chemical engineering according to the design requirements. The purpose of degreasing is to prevent the transported or stored materials from being contaminated by grease or organic matter; Avoid mixing transported or stored materials with grease or organic matter; Oil content to ensure the activity of the catalyst; The content of oil and organic matter to ensure the purity of the product. The installed square pipe shall be disassembled into pipe sections for degreasing. Pipes that cannot be disassembled after installation shall be degreased before installation. Square pipes with obvious oil stains or serious corrosion shall be cleaned by steam purging, sand blasting or other methods before degreasing.

Tampa.On the basis of thermodynamic calculation, the quality assurance of square tube, rectangular tube, seamless square tube, galvanized square tube and galvanized tube is professional. New and old customers are welcome to consult during the preferential activities. The process conditions of calcium treatment of 20CrMo sulfur-containing square tube are analyzed, and the sulfur-containing gear rolled products after calcium treatment are sampled and studied. The conclusions are as follows: in order to minimize the generation of Cao in sulfur-containing square tube steel, Omega in molten steel; (O) It must be taken off to 10 & times; The rate of calcium can only be guaranteed below 10-6.

Production standard classification square tube is divided according to production standard: 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 tensile test is to make q355b into a sample, pull the sample to fracture on the tensile testing machine, and then measure one or more mechanical properties. Usually, only tensile strength, yield strength, elongation after fracture and reduction of area are measured. Tensile test is the basic mechanical property test of metal materials. Almost all metal materials have specified tensile test as long as they have requirements for mechanical properties. Especially for those materials whose shape is not convenient for hardness test, tensile test has become the only means to test mechanical properties.