导热能力对TC4合金高速干摩擦及其热行为的影响

Effect of Thermal Conductivity of TC4 Alloy on Tribological and Thermal Behaviors under High Speed Dry Sliding

采用具有较好导热性能的紫铜与TC4合金机械镶嵌,组成的销试样与纯TC4合金销试样的摩擦磨损特性及热行为特性进行对比研究。研究结果表明随着摩擦功的增加,使用紫铜强化导热的TC4-紫铜组合销试样与纯TC4合金销试样的摩擦表面温度整体均为上升趋势,但是TC4-紫铜组合销试样的摩擦表面温度与纯TC4合金销试样相比有大幅度的降低,纯TC4合金销试样的表面温度在升高到一定程度以后由于相变吸收热量,其表面温度出现降低的趋势。使用紫铜强化导热后,摩擦副的摩擦因数有所提高,材料的耐磨性也有一定程度的提高。

Red copper was used as the backseat to enhance the capacity of heat transmission of TC4 sample. The tribological and wear and thermal behavior of TC4 alloy of different capacity of heat transmission was measured under high speed sliding. The results indicate that the surface temperature is increased as the friction power increasing. Compared with the all TC4 alloy sample, the surface temperature of the TC4- red copper combination sample is further lower. When the temperature of the all TC4 alloy sample rises to some value, it will decrease due to the endothermic process of phase transformation. The friction coefficient and the wear resisting property of the TC4- red copper combination sample is higher than that of the original sample.