| 摘要 |
<p>A method for producing profiles from non-ferrous rod to close dimensional tolerances, and the profile, continuous or discontinuous, thus produced. The method comprises continuous casting of the metal using a wheel-casting arrangement to produce a shaped bar. The shaped bar may also be optionally scalped to remove segregated impurities. The bar then undergoes cross-sectional area reduction and pre-shaping by hot rolling, preferably in-line to produce a continuous rod. The shaped bar is optionally pre-heated before hot rolling. To produce small cross section profiles, continuous or discontinuous, the rod can then be cold rolled to produce the desired shape. To produce large cross section profiles, the hot rolled bar is subjected to an intermediate extrusion step to increase the cross-sectional area of the rod before cold rolling. The preferred metal working technique for this intermediate step is the frictional extrusion process, where an optional pre-shaping can also be performed.</p> |
