Study of the Features of Obtaining Bimetallic Pipes and Rods by Explosion Welding with Subsequent Hot Deformation

摘要

In this paper, we study the features of obtaining bimetallic pipes and rods using explosion welding and subsequent hot deformation. Explosion welding allowed obtaining continuous cylindrical two-layer billets with a combination of steel 20 + 08Crl8Ni10Ti layers with almost 100% adhesion of the layers, without surface defects, and with a specified residual deformation in diameter. We determined that replacing the atmosphere with helium in the welding gap does not reduce or eliminate microdefects in the joint. Subsequent hot plastic deformation did not affect the ratio of the component layer thicknesses. A combined technology for the production of bimetallic pipes and rods with a combination of steel 20 + 08Crl8Ni10Ti layers, which allows obtaining pipes and rods with a corrosion-resistant coating and sizes that are included in the range of pipes used in the energy industry, was developed and tested.