→ compared with the concrete structure, the I-steel structure can increase the service area by %, reduce the self weight of the structure by % - %, and reduce the structural design internal force.b. The professional two-sided arc welding processing technology can complete the electric welding at a good position, which is not easy to have the disadvantages of staggered joint, welding deviation and incomplete penetration, and it is very easy to manipulate the welding quality.Drashkin,Cutting machine, electric welding machine, polishing machine, electric hammer, etc The defects can be removed by grinding with sand wheel, but the remaining wall thickness must be within the allowable standard.Mogadishu,At present, there is still a big gap in the production technology of C-section steel between China and foreign countries.I-beam is widely used in buildings or other metal structures.Due to the relatively high and narrow section size of ordinary I-beam and light I-beam, the moment of inertia of the two main sleeves of the section is quite different, which makes it very limited in the scope of application. The use of I-beam shall be selected according to the requirements of design drawings.

I-beam: national standard * what is the wall thickness of I-beamSeamless pipe is made of steel block or solid pipe blank and then made by hot rolling, cold rolling or cold dial. Seamless pipe plays an important role in China&#;s steel pipe industry. Seamless pipe production processes are relatively rich, generally according to the corresponding steps of processing and production.After the passivation treatment of alloy pipe, it is clearly proposed that water cleaning shall be carried out immediately after the aqueous solution, ~ times of water cleaning, and then chromic acid closed solution shall be carried out. Chromic acid solution must be carried out h after the subsequent water cleaning of metallographic structure and austenitic alloy pipe. Chromic acid aqueous solution (mass ratio) is % ~ %, the solution temperature is ~ ℃, and the solution time is min. Then dry.how much,I-beam is mainly divided into ordinary I-beam, light I-beam and wide flange I-beam. According to the height ratio of flange to web, it is divided into wide, medium and narrow flange I-beams. The specifications of the first two are -, that is, the corresponding height is -. At the same height, the light I-beam has narrow flange, thin web and light weight. Wide flange I-beam, also known as H-beam, is characterized by two parallel legs and no inclination on the inner side of the legs. It belongs to economic section steel and is rolled on four high universal mill, its utilization value is higher, the chemical composition of alloy pipe contains more Cr, and its performance of high temperature resistance, aerospace, chemical industry, electric power boiler and other industries because the mechanical properties of alloy tubes change and are easy to adjust.I-beam has the dual properties of high hardness and toughness materials. Compared with other engineering wear-resistant materials in China,Drashkin16Mn welded pipe manufacturer, such as various alloy steel plates, cast wear-resistant plates, cast stones, rubber,DrashkinHastelloy C276 tube, polyurethane, it has irreplaceable comprehensive excellent properties.

Precision cold rolling of small and medium-sized bearing sleeves with alloy tubes can greatly improve material utilization, bearing performance and service life. This paper systematically introduces the development of high quality cold drawn bearing steel pipe and its application in bearing. Precision cold rolling of small and medium-sized bearing sleeves with bearing steel pipes can greatly improve material utilization, bearing performance and service life. This paper systematically introduces the service life of high quality cold drawn bearings.average method,Metallization: refers to the process of penetrating metal atoms into the surface layer of alloy steel pipe. It is to alloy the surface layer of steel so that the workpiece surface has the characteristics of some alloy steel. Aluminizing chromizing, boronizing, siliconizing and so on are commonly used in production. Seamless tube has high elasticity, can be reused on mechanical equipment, no memory, no deformation anti-static.At the same height, light I-beam has narrower legs, thinner waist and lighter weight than ordinary I-beam. No. - is large I-beam, and No. - is medium I-beam. Imported I-beam shall be marked with actual specifications, dimensions and relevant standards.Drashkin,→ the two surfaces of the flange are parallel to each other, making it easy to connect, process and install.C - section steel is reliable and stable in stress, can be accurately positioned, it has good versatility and combination,DrashkinHow much is a 200x200 I-beam, and has a variety of C-section steel and size selection to ensure its flexibility Special rolling method. When it is difficult to roll the required I-beam by the usual rolling method for some reason, the special rolling method can be used to make full use of the skills of uneven deformation and pass design. For example, when the billet section is narrow and wide I-beam is required to be rolled, the wave rolling method can be used; for example, when the billet is wide and small I-beam is required to be rolled, the negative rolling method can be used Spread rolling, etc.