Mechanism of seizure and the evaluation of antiseizure property of bearing materials

新设计了一种轴承材料夹持测试仪。将旋转的空心气缸与静止的空心气缸按压摩擦，使两气缸的接触界面之间发生抓扣。通过具有不同柔度的螺旋弹簧给予接触载荷，从而控制上缸试件的向上运动阻力。通过对各种轴承材料的卡扣试验，了解到卡扣是摩擦副上部构件被抬起的现象，在摩擦界面和滑动间隙的另一端之间插入了大尺寸的粘附颗粒。这一事实意味着材料的夺取是磨损颗粒通过相互材料转移和生长机制形成的过程之一。因此，很明显，一个强有力的对策是选择材料组合，因为只有所谓的轻度磨损，在这种情况下，即使润滑状态变差，也会在摩擦过程中显示出在大范围内很少观察到的粘附颗粒的相互转移和生长。结果表明，本文设计的止动测试仪可用于评估轴承材料的抗止动性能。

A seizure-tester for bearing materials was newly designed. A rotating ho11ow cylinder is pressed and rubbed against a stational hollow cylinder, so that the seizure caught be occure between the contact interface of the two cylinders. The contact load is given through a coil spring with various compliance, then the upward moving resistance of upper cylinder specimen can be controlled. After the seizure tests for various bearing materials, it was understood that the seizure is a phenomenon in which the upper component of rubbing pair is lifted up with a grown big-sized adhered particle interposed between the rubbing interface to opposite end of sliding clearance. This fact means that the seizure of materials is one of the formation process of wear particles through mutual material transfer and growth mechanism. Accordingly, it becomes obvious that a strong countermeasure for seizure of materials is to select the material combination as only so-called mild wear, in which the mutual transfer and glowth of adhered partcles scarecely observed at a big scale, is revealed during rubbing, even if the lubrication state becomes poor. As a result, it is seen that the seizure tester designed here is useful to evaluate the antiseizure property of bearing materials.