발간논문

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Vol.8, No.2, 72 ~ 84, 1970
Title
A Study on the Hot Extrusion of Seamless Pipe with Cast Steel Billets
최형섭H . S . Choi, 장경택K . T . Chang
Abstract
Usually forged steel billets are used to extrude tubes or rods. In this investigation, cast steel billets were hot-extruded to seamless pipes. By using cast billets, it is possible to elminate hot working operations of the material prior to extrusion. Fine fiber structures and mechanical properties equivalent to extruded products from for ged billets were obtained from the cast billet extrusion. Billet preparation and lubricating processes are described in details. The change of micro-structures and mechanical properties by hot-extrusion of cast steel billets are discussed.
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