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Four - way stainless steel

Introduce

Four stainless steel different diameter diameter and generic points, such as pipe diameter four through the end are the same size; different diameter four. Charge the same size, and the size is smaller than the head of branch pipe pipe size. A stainless steel four pass is a pipe for the branch of a pipe. For the use of seamless tube manufacturing for four links, there are two commonly used processes: hydraulic bulging and hot pressing. The hydraulic bulging of the A. hydraulic bulging four - way is a forming process of expanding the branch pipe through the axial compensation of the metal material. The process is to use special hydraulic machine, tube with four equal diameter are injected into the liquid through the two level side hydraulic cylinder synchronous motion of extrusion billet, billet extrusion volume change, the liquid in the tube with the tube size and the pressure, when achieved the four branch expansion required pressure, the metal material in the cylinder and tube blank inner liquid pressure under the dual role of the mold cavity flow and expansion pipe. The four - way hydraulic bulging process can be formed once, and the production efficiency is high; the head of the four - pass and the wall thickness of the shoulder are increased. Because the hydraulic bulging process of seamless four - pass is large in tonnage, it is mainly used in the manufacturing of standard wall thickness four through less than DN400 at home. The suitable forming materials are low carbon steel, low alloy steel and stainless steel with relatively low cold hardening tendency, including some non-ferrous metals, such as copper, aluminum and titanium. B. hot forming four hot forming tube blank will be greater than four in diameter, about four to flatten the size of the diameter, open a hole in the pipe tensile part; billet heated in forming model, and the tube is arranged in the pipe drawing die; under the action of pressure tube is in the process of radial compression, radial compression in the direction of flow and the formation of metal pipe to pipe in the drawing die. The whole process is formed through the radial compression of the tube and the drawing process of the branch pipe. Different from the hydraulic bulging four, the metal of the hot pressed four - pass pipe is compensated by the radial motion of the tube, so it is also called the radial compensation process. The tonnage of the equipment needed for the material forming is reduced because of the use of four - pass after heating. The hot pressing four way has wide adaptability to materials, and is suitable for materials of low carbon steel, alloy steel and stainless steel. Especially for large diameter and thick wall four links, the forming process is usually adopted.

Standard

Makes the standard can be divided into standard, standard, water, electricity American Standard, German standard, Japanese standard, Russian standard, specific such as GB/T12459, GB/T13401,

ASME B16.9, SH3408, SH3409, HG/T21635, DL/T 695, SY/T 0510, DIN 2615