Expansion of a pair of dissimilar metal shells in lined-pipe production

Abstract

Globally, the working life of metallurgical products is being increased. To that end, a promising approach is the use of laminar composites. In particular, experience shows that the working life may be greatly increased by using bimetallic and lined pipe instead of monometallic pipe. Lined pipe is bimetallic pipe produced by the expansion of coaxial shells made from different materials. Little attention has been paid to lined pipe in the literature on the production of composite and bimetallic pipe. The shaping methods used in the manufacturing of lined pipe differ from those for other bimetallic pipe. These differences must be taken into account in the development of lining technologies. The lack of information regarding the shaping of the shells in lining complicates the machining of lined pipe. Therefore, the present research is devoted to the deformation and shaping of paired coaxial shells and the nonuniform strain distribution between the inner and outer shells in the lining process, as well as the influence of these factors on the ratio of strength properties of the materials in the lined pipe produced.