Structural Transformations in Hull Material Clad by Nitrogen Stainless Steel using Various Methods

摘要

Specimens of a 10N3KhDMBF shipbuilding hull steel were clad by a 04Kh20N6GllM2AFB nitrogen austenitic steel using various treatment conditions, which included hot rolling, austenitic facing, and explosive welding followed by hot rolling and heat treatment. Between the base and cladding materials, an intermediate layer with variable concentrations of chromium, manganese, and nickel was found, in which a martensitic structure was formed. In all the cases, the strength of bonding of the cladding layer to the hull steel (determined in tests for shear to fracture) was fairly high (σ_(sh)= 437-520 MPa). The only exception was the specimen produced by unidirectional facing without subsequent hot rolling (σ_(sh)= 308 MPa), in which non-fusions between the faced beads of stainless steel were detected.