Controlling surface oxidation during titanium alloy forging remains critical for maximizing material utilization and mechanical performance. Recent process innovations demonstrate that integrated surface treatments combined with advanced heating methodologies can significantly enhance final product quality.
Pre-oxidation treatment establishes a controlled oxide layer that fundamentally alters surface morphology. This preparatory step eliminates undesirable fish-scale patterns while facilitating subsequent glass-enamel coating removal. The treatment modifies surface plasticity characteristics, particularly when combined with abrasive blasting techniques that refine grain structure near the surface.
Heating methodology selection directly impacts oxidation kinetics. Conventional electric furnace heating below allotropic transformation temperatures maintains acceptable gas absorption levels within one-hour cycles. However, pseudo-fluidized bed heating in particulate media demonstrates superior thermal transfer efficiency, approaching molten salt bath performance while eliminating salt contamination risks. The enhanced heat transfer coefficients enable rapid, uniform heating that minimizes high-temperature exposure duration.
Process optimization requires systematic evaluation of oxidation treatment parameters, protective coating formulations, and post-forging surface conditioning. Glass-enamel coatings applied over pre-oxidized substrates demonstrate synergistic effects on surface plasticity. Environmental controls including inert atmosphere shielding and positive pressure furnace operation further suppress oxide formation. These integrated approaches enable consistent production of precision titanium forgings with controlled surface characteristics and optimized mechanical properties.
