论文部分内容阅读
作者从摩擦温度的观点考察了钢在滑动接触中擦伤的温度效应。擦伤试验是在环-块试验机上进行的。采用埋在固定的块试样表面下0.15～0.25mm深度处的NiCr-NiAI热电偶测量摩擦温度。热电势由采样间隔为5ms的数字电压表测得。 研究结果表明,金属发生擦伤时的表面摩擦温度T_(oa)与载荷及滑动速度有关:载荷越高,T_(oa)也越高;而滑动速度越高,则T_(oa)越低。金属擦伤时,表面形成“白层”组织,认为这是由于瞬时经历很高的摩擦温度及随后的快速冷却所致。
From the viewpoint of friction temperature, the authors investigated the temperature effect of steel on the sliding contact in the sliding contact. The abrasion test is carried out on a ring-block tester. The friction temperature was measured using a NiCr-NiAI thermocouple buried at a depth of 0.15 to 0.25 mm below the surface of the fixed block specimen. The thermoelectric power is measured by a digital voltmeter with a sampling interval of 5 ms. The results show that the surface friction temperature T oa (oa) is related to the load and sliding velocity when the metal is scratched. The higher the load, the higher the T oa. The higher the sliding velocity, the lower the T oa. When the metal scratches, the surface forms a “white layer” of tissue, which is believed to be due to the instantaneous high friction temperature followed by rapid cooling.