Extruded steel pipe

Extruded steel pipe is produced by cold extrusion, hot extrusion, warm extrusion process.

Hot extrusion is widely used in the production of aluminum, copper and other nonferrous metal pipes and profiles. Hot extrusion of steel for the production of both special pipes and profiles, it is difficult to produce with cold or warm extrusion extrusion of solid and pore heart (through-hole or blind hole) of carbon and alloy steel parts, such as a rod having a thick head, barrel, containers and the like. Hot extrusion of dimensional accuracy and surface finish than hot forging, but still need to go through with the site generally finishing or machining.

Cold extrusion originally used only for the production of lead, zinc, tin, aluminum, copper and other pipes, profiles, as well as toothpaste tube (wrapped in tin-lead), dry shell (zinc), casings (copper) and other parts. The mid-20th century, the beginning of the cold extrusion technology for carbon steel and alloy steel parts, such as rods and rod-shaped pieces of various cross-sectional shapes, piston pin, wrench socket, spur gear, etc., and later for squeeze some high-carbon steel, bearing steel and stainless steel. High precision cold extrusion, surface finish, can be directly used by the parts without cutting or other finishing. Simple cold extrusion operation, suitable for mass production of small parts (steel extrusions generally not more than 100 mm in diameter).

Extrusion is an intermediate temperature between the cold extrusion process between the hot extrusion, under appropriate circumstances by warm extrusion can have both advantages of both. But warm extrusion billet and preheat the mold needs to be heated, high-temperature lubrication is still not ideal, shorter tool life, so not very widely applied.

Post time: Oct-30-2019