Technology for manufacturing seamless Al-alloy pipe

A technology for manufacturing seamless Al-alloy pipe includes such steps as making hollow pipe blank and cold rolling. It features preheating the surface of steel mandrel and internal surface of mould to 280-320 deg.C, extrusion casting hollow pipe blank at 700-740 deg.C, instantaneous pressurizing by 45-140 MPa for 60-120 seconds, and cold rolling. Its advantages are simple process and high percentage of finished products.