Study on Load Carrying Capacities of Gears with Multiple Layer

分别在四球试验机和动力循环齿轮机上研究了463K左右硫化处理后钢球的抗夹紧性和齿轮的抗划痕性能。结果表明，渗硫球的抗夹持性和齿轮表面渗硫层的划痕阻力约为未渗层的1.5~2.0倍，并认识到钢球试验中的尺寸阻力与齿轮试验中的划痕阻力之间存在较大的关系。为了解镀锡后热扩散不锈钢球的耐震性和摩擦特性，在浸渍进给润滑和干摩擦条件下进行了四球试验。从癫痫发作试验中，获得了以下结果。在浸渍进给润滑条件下，摩擦因数随扩散层厚度的增加而减小，而钢球的抗咬合性随扩散层厚度的增加而增大。扩散层厚度为8m的球体的咬合阻力约为无扩散层时的2.6倍。此外，在干摩擦条件下，锡扩散层厚度超过4m的钢球与其夹持初期的运行时间约为5min，与扩散层厚度无关，比没有扩散层的钢球的运行时间要长得多。

The seizure resistance of balls and the scoring resistance of gears, which are sulphurized at a temperature of about 463 K were investigated by a four-ball machine and a power-circulating gear machine, respectively. As a result, it was clarified that the seizure resistance of the sulphurized balls and the scoring resistance of the suplhurized gears were about 1.5-2.0 times larger than those of the unsuplhurized ones, and a considerable relationship between the siezure resistance in the ball tests and the scoring resistance in the gear tests was recogized. Further, the scoring resistance of the gears was increased with increasing viscosity of the lubricants.To clarify the seiezure resistance and the frictional characteristics of stainless steel ball, which was thermally diffused after Sn-plated, four-ball test was run under dip-feed lubrication and dry friction. From the seizuring test, the following results were obtained. Under dip-feed lubrication, the coefficient of friction was decreased with increasing thickness of the Sn-diffused layer, and the seizure resistance of the ball was increased with increasing thickness of the diffused layer. The seizure resistance of the ball in which the diffused layer was 8 m thick was about 2.6 times larger than that without diffused layer. Further, under dry friction, the running time at the incipient stage of seizuring with the balls in which the thickness of the Sn-diffused layer exceeded 4 m was about 5 min independently of the thickness of its layer, and it was considerably longer than that without diffused layer.