【摘要】 本文对模具钢模拟热磨损实验摩擦副的表面温度场进行了理论分析。算出3Cr2W8V模具钢试样表面温度达到740℃,表面0.5mm薄层内的温度高于600℃回火温度。采用“可磨式”动态热电偶进行动态测量得出:试样表面最高平均温度达800℃,而瞬时温度峰值可达1200℃。此外,采用金相(硬度)法对试样进行测温也得到了类似的结果。研究结果还表明:冲头温度和摩擦线速度增高,表面最高平均温度也增高,而正压力对表面温度的影响不明显。更多还原

【Abstract】 In this paper the temperature field of friction surface and secondary surfaceof die steel have been analyzed in thermal wear testing. The calculated surfacetemperature of 3Cr2W8V die steel is up to 740℃ and secondary surface tempera-ture 0.5 mm below the surface is high than 600℃. Using grindable thermocoup-le, the measured highest mean temperature is up to 800℃ and the maximum flashtemperature is up to 1200℃. The same results were obtained by metallographmethod (hardness method)and coincided were with calculated values. It is shownthe mean surface temperature is directly proportional to the workplace tempera-ture and friction speed. Obvious effect of normal stress was not observed.更多还原