Steel pipe-lined Fe–W₂B-based composite coating by centrifugal-Self-propagating high-temperature synthesis process

Abstract

In this study, Fe–W₂B-based composite coating on the inner surface of a steel pipe was produced by centrifugal- Self-propagating high-temperature synthesis (SHS) process. There were FeWO₄, B₂O₃, and Al powders as the major reactants. The effects of coupled additives X(Fe₂O₃–Al) of X = 1, 3, and 5 molar ratio on morphology, composition and micro-hardness of the obtained composite coatings were investigated. The results showed that the system of X = 1 mole was the optimum condition due to its reasonable smoothness (6.5 µm) and hardest (727.90 and 1170.71 HV on alloy and ceramic layers, respectively).