采用Mo电极分别在空气和硅油中对Ti811钛合金表面进行电火花强化处理(ESS),探讨消除强化层中裂纹缺陷的途径.将ESS与喷丸强化复合,拟使Ti合金微动疲劳(FF)抗力得到显著改善.结果表明:Mo电极在空气中电火花强化处理Ti811钛合金表面后,强化层出现明显的微裂纹缺陷,由此导致其微动疲劳抗力降低.在硅油中用Mo电极电火花处理Ti811合金不仅消除了表面裂纹缺陷,而且使钛合金表面具有良好的减摩润滑作用,显著改善了钛合金基材的耐磨性能;再经喷丸强化处理,使钛合金基材的微动疲劳抗力显著提高.
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