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Which process parameters can effectively inhibit the formation of holes?

The process parameters that effectively inhibit the formation of holes in high-temperature titanium alloy foil mainly include:

• Reasonable control of heating and cooling rates
Using slow heating and cooling rates (such as heating at about 60℃/hour and cooling at about 40℃/hour) for multi-stage annealing treatment can help eliminate residual stress and reduce holes and cracks caused by thermal stress.

• Optimize rolling temperature and deformation degree
Hot rolling is carried out within a suitable temperature range to avoid gas precipitation and coarse structure caused by excessive temperature, and at the same time control the deformation amount to prevent microcracks and holes.

• Control alloy composition and purification level
Use high-purity raw materials, strictly control the content of gases such as oxygen, nitrogen, and hydrogen, and reduce the formation of holes caused by inclusions and gases.

• Use vacuum or protective atmosphere heat treatment
Heat treatment is carried out under vacuum or inert gas protection to prevent oxidation and gas adsorption and reduce hole defects.

• Adjust the laminated sintering process parameters
By controlling the thickness, pressure and temperature of the laminated material, the material can be densified and the interlayer pores can be eliminated.

• Processing cooling and tool parameter optimization
Use high-pressure and high-flow cutting fluid cooling, combined with high-performance tools, to reduce processing temperature and hardening, and avoid holes caused by local overheating.

• Online monitoring and intelligent control of process parameters
Use process monitoring technology to adjust parameters such as temperature, pressure, deformation rate in real time to ensure process stability and prevent holes.

In short, through reasonable temperature control, alloy purification, heat treatment environment, laminate densification and optimization of processing cooling process, the generation of holes in high-temperature titanium alloy foil can be effectively suppressed, the density and mechanical properties of the material can be improved, and the needs of high-end applications can be met.