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The Oxygen Diffusion Process

October 31, 2012
Jean Van Rensselar
Tip or Best Practice

The Oxygen Diffusion Process

The oxygen diffusion (OD) process creates dramatic improvements in the hardness and tribological performance for a variety of titanium alloys. The process consists of heat-treating titanium alloys in air or an oxygen-nitrogen binary gas at a temperature ranging between 1,022 F and 1,652 F (550C. – 900C.) for anywhere from a few minutes to hundreds of hours. This is followed by air or furnace cooling. OD produces a top oxide layer and a near-surface hard, wear-resistant oxygen-diffusion zone (1-300 um). The oxide layer is then intentionally polished off to expose the diffused surface. Advantages include:

  • The process is easy to conduct
  • The process is inexpensive
  • Efficiency increases due to friction reduction
  • Reliability and durability improve due to wear reduction
  • There are no part size and geometry restrictions
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