Alloy steel pipe
Steel pipe is mainly used in power plants, nuclear power, high-pressure boilers, high-temperature superheaters and reheaters, and other high-pressure and high-temperature pipelines and equipment. It is made of high-quality carbon steel, alloy structural steel and stainless heat-resistant steel. Hot rolled (extruded, expanded) or cold rolled (drawn).
Alloy pipes have a hollow cross-section and are widely used as pipelines for transporting fluids, such as pipelines for transporting oil, natural gas, gas, water and certain solid materials. Compared with solid steel such as round steel, alloy steel pipe is lighter when the bending and torsional strength is the same. Alloy steel pipe is an economical cross-section steel, which is widely used to manufacture structural parts and mechanical parts, such as petroleum drill rods and automobile transmissions. Axles, bicycle frames, and steel scaffolding used in building construction. Manufacture of annular parts with alloy steel pipes can improve the utilization rate of materials, simplify the manufacturing process, save materials and processing hours, such as rolling bearing rings, jack sleeves, etc. Currently, steel pipes have been widely used for manufacturing. Alloy steel pipe is also an indispensable material for various conventional weapons. Gun barrels, barrels, etc. must be made of steel pipes. Alloy steel pipes can be divided into round pipes and special-shaped pipes according to the different cross-sectional area shapes. Since the circular area is the largest under the condition of equal perimeter, more fluid can be transported by the circular tube. In addition, when the cross section of the ring is subjected to internal or external radial pressure, the force is more uniform. Therefore, most steel pipes are round pipes.
| Title: Alloy Steel Pipe 3 |
| Brief introduction: With the advancement of the superheating temperature of molten iron in the smelting of 12cr1mov seamless steel pipes and the extension of the hot metal holding time at high temperature, the graphitization of cast iron weakens, pearlite increases, and the graphite and matrix structure refine; The cast iron, which was originally white or hemp, turned gray, and the spheroidizing agent could make the flake graphite into a floc or spherical shape. That is to say, with the same chemical composition and 12cr1mov seamless steel pipe cooled in the same mold, different cast iron structures can be obtained due to different treatment methods of molten iron melting. According to 12cr1mov seamless steel pipes, different cast iron structures are requested. Request high-strength castings: graphite is preferred to be spherical or floc, and matrix is to be pearlite; request tough castings: in addition to wishing to have spherical or floc graphite, ferrite is better; request resistance Grinded castings: In addition to the desire to have a fine pearlite outer body, and have a low alloy without ... [ Details ] |