KondovoThick wall hot dip galvanized square pipeWhat are the main types of production lines

Square pipe for diamond core drilling (gb-) is a square pipe for drill pipe, core rod and casing for diamond core drilling.. fake and inferior square tubes are easy to fold. Folding is a variety of broken lines formed on the surface of square tubes, and this defect often runs through the longitudinal direction of the whole product. The reason for the folding is that the fake and shoddy manufacturers pursue the rate, the reduction is too large, resulting in ears, folding occurs during the next rolling, the folded products will crack after bending, and the strength of the square tube will be greatly reduced.Kondovo,The analytical technology of square tube sizing rolling. When sizing rolling is adopted, because there is no tool on the inner surface, the shape of the inner surface of the rolled material is not neat when rolling the tube. When the roll mill is used, the inner surface of the rolled material is angular. The occurrence mechanism of this phenomenon and the countermeasures to be taken are clarified by using the three-dimensional finite element method.There are many ways of ignition, such as arc, electric spark, flame, strong current, high-temperature furnace, electron beam, laser, high-temperature radiation, microwave, etc.Erzincan,Stage ( & mdash; )High quality steel (P & le; .%, S & le; .%)Functional index analysis of qb square tube - mechanical function of plastic square tube. Solid bending, 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.

Due to the increase of square tube production, there are more and more fake and shoddy square tubes in the market. How to distinguish the fake and shoddy square tubes? Let me teach you some points to distinguish the fake and shoddy square tubes.For seamless qb 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 qb square tubes.Compared with other welding, square pipe welding has many advantages, mainly because of the exothermic reaction the material only needs to be heated below the melting pointThe cheapest,Put the pig iron for steelmaking into the steelmaking furnace according to the specified process to obtain steel. The products of steel include ingots, steel refers to the steel rolled into various square tubes. Square tube steel belongs to ferrous metal,Kondovo159 galvanized pipe,KondovoPrice list of 6m galvanized square pipe, but steel is not completely equal to ferrous metal.Square tube for automobile half shaft sleeve (gb-) is a high-quality carbon structural steel and alloy structural steel hot-rolled square tube for automobile half shaft sleeve and drive axle housing.Among them, qb square tube is divided into: (a) by 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 (b) are divided by weld & mdash& mdash; Straight seam welded square pipe spiral welding

Hardness hardness is a pointer to measure the hardness and softness of metal materials. At present, the hardness method is commonly used to measure the hardness in production. It uses the indenter with fixed geometry to measure the hardness value of the metal material surface tested under fixed load according to the degree of hardness.Home page recommendation,The strength, plasticity and hardness discussed above in fatigue QB are the indicators of the mechanical properties of metals under static load. In fact, many machine parts work under cyclic load, under which fatigue will occur.The purpose of heat is to prevent the generation of cold cracks. Cold crack is directly related to carbon equivalent. Therefore, and the carbon equivalent of the qb square tube is the same. If the carbon equivalent of Q is less than .%, it can be said that the weldability is OK. Generally speaking, the cold crack increases when the carbon equivalent is .%.Fake and shoddy square tubes are easy to scratch, because the equipment of fake and shoddy material manufacturers is simple and easy to produce burrs and scratch the surface of square tubes. Deep scratches reduce the strength of square tubes.Kondovo,Large diameter qb square tube production standard classification square tube is divided according to production standard: national standard square tube, Japanese standard square tube,Kondovo4 points galvanized pipe outer diameter, British standard square tube, American standard square tube, European standard square tube and non-standard square tube.Main uses of square tube: square tube is mainly used in tap water engineering, petrochemical industry chemical industry, electric power industry, agricultural irrigation and urban construction. It is one of the key products developed.In this period, the technology of continuous rolling pipe was not mature.