Abstract The combined effects of low-temperature nitriding (LTN) and cold rolling on the microstructure of commercially pure titanium (CP titanium) were investigated. The grain size of the LTN-treated CP titanium decreased with increasing thickness reduction due to the cold rolling pre-treatment and with decreasing the nitriding temperature. The fatigue limit for the nitrided CP titanium depended on the grain size beneath the nitrided layer and increased with decreasing the nitriding temperature because of the suppression of grain-coarsening. Furthermore, the LTN at 873 K decreased the friction coefficient and reduced the wear loss of CP titanium during the ball-on-disk dry friction tests.

中文翻译：

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低温渗氮冷轧对工业纯钛疲劳性能的综合影响

摘要 研究了低温氮化（LTN）和冷轧对工业纯钛（CP钛）显微组织的综合影响。LTN 处理的 CP 钛的晶粒尺寸随着冷轧预处理导致的厚度减少量的增加和氮化温度的降低而减小。渗氮 CP 钛的疲劳极限取决于渗氮层下方的晶粒尺寸，并且由于晶粒粗化的抑制而随着渗氮温度的降低而增加。此外，在 873 K 的 LTN 降低了摩擦系数，并降低了 CP 钛在球盘干摩擦试验期间的磨损损失。