When light alloys used in coal mine, the sparks generated by mechanical friction and impacts are the main effective ignition source. While the hot surfaces are concomitant in friction process, prior to the occurrence of mechanical sparks, whether the hot surfaces will be an effective ignition source. Then this paper focuses on the development of hot surfaces generated by TC4 titanium alloy at the low friction velocities. Experiments and finite element simulation methods were used together to describe the temperature field of TC4 titanium alloy. It was found that the temperature of hot surfaces increased with the load and increased much faster at higher relative speed. By means of regression analysis, the variation law of friction coefficient and contact pressure with loads and the variation law of hot surface temperature with friction coefficient and pressure were studied, then the fitting curve of hot surface temperature was obtained. The results of calculations and experiments indicate that hot surfaces generated by light alloy was possible to be an effective ignition source for methane air mixture in coal mine.

在煤矿使用轻合金时，机械摩擦和冲击产生的火花是主要的有效点火源。虽然在摩擦过程中会伴有高温表面，但在发生机械火花之前，高温表面是否会成为有效的点火源。然后，本文着重研究TC4钛合金在低摩擦速度下产生的热表面的发展。实验和有限元模拟方法一起用于描述TC4钛合金的温度场。发现热表面的温度随负载而增加，并且在较高的相对速度下升高得更快。通过回归分析，研究了摩擦系数和接触压力随载荷的变化规律，以及热表面温度随摩擦系数和压力的变化规律，得出了热表面温度的拟合曲线。计算和实验结果表明，轻合金产生的热表面可能是煤矿瓦斯混合气的有效点火源。