The Structure of Multi-Layer Composite Material Obtained by the Method of Diffusion Welding

Abstract

Creation of reliable and durable composite materials made of components with different properties is an urgent task. Such materials include multilayered steel. Alternation of a large number of heterogeneous layers leads to a set of properties that are unattainable for homogeneous steel. Production of such composite materials faces many problems. The use of diffusion welding has created a number of composite materials based on steels of different composition, and their properties allow you to use them in the manufacture of cutting tools. The purpose of this work was to study the structure of multilayer composite materials obtained with the help of diffusion welding and the study of the heat treatment effect on the material structure. During the study, the structures of samples of six different composite materials were studied after annealing and after quenching of the metal. The study showed that the studied materials have a pronounced layered structure with a sharp transition boundary from one layer to another. The technology used in the production of composites ensures the actual absence of the transition zone and the absence of such frequent diffusion welding defects as stratifications, pores, oxide inclusions, etc. The study found that during heat treatment process sizes of carbide inclusions in the composite layers decreases, and their number increases.