分析了直升机主减速器齿轮电刷镀修复后产生裂纹的成因，通过试验提出了喷丸强化改进措施。
The cause of cracks after brush-plating on the main speed reducer of helicopter was analyzed and the ameliorative measures by shot-peening were brought forward consolidation.
采用高能喷丸方法使工业纯钛疲劳试样的表层实现纳米化，并进行了疲劳试验。
Fatigue test was carried out for commercial pure titanium that have nano-crystallized in surface by high-energy shot peening.
台架试验表明，采用该喷丸机对后桥主动锥齿轮进行强化喷丸处理，齿轮的平均寿命提高约40%。
The test results show that the average life of gear can increase40%approximately by taking peen shot for rear axle pinion gear.
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