超硬涂层材料滚动接触疲劳试验机的研制

在总结分析目前国内外表面超硬涂层零件接触疲劳失效行为评估技术的基础上，依据超硬涂层零件接触疲劳失效机制模型，自主研制了一种超硬涂层材料滚动接触疲劳试验机。介绍了该试验机的设计原理和特殊功能，采用该试验机对51306纳米超硬材料涂层轴承滚动接触疲劳失效行为进行了试验评定。试验证明所研制的超硬涂层材料滚动接触疲劳试验机智能检测控制系统能够动态探测诊断涂层轴承表面初始疲劳裂纹并实现急停，可捕捉试验轴承表面疲劳初始状态，为超硬涂层零件接触疲劳失效机制分析提供可靠的试验依据。

Design and Development of a Rolling Contact Fatigue Test Machine for Superhard Coatings

Based on a model of the mechanism of rolling contact fatigue of coated components, a new test machine for roiling contact fatigue for coated ball bearing components was designed and developed, and evaluation experiments on the rolling contact fatigue performance of nanostructured coatings on bearing raceways were performed by applying the new test machine. These experiments confirm the suitability of the machine to evaluate the rolling contact fatigue resistance of coated raceways. The measurement system of the test machine can detect and diagnose the initial fatigue cracks of the raceways with nanostructured coatings applied. The control and transmission system of the fatigue test machine can quickly stop its operation to maintain the initial state of the fatigue cracks, which provides a revealing insight into coating behaviour under rolling contact conditions.