Curve squeal noise is one of the greatest noise sources among railway noise when a vehicle is passing through the sharp radius curve. Furthermore, its high frequency and pure tone component cause a great deal of pain to residents around the track. Squeal noise is caused by lateral creep of wheel/rail contact point in curve. When railway vehicle passes through a sharp curve, negative friction under conditions of lateral creepage induces stick–slip oscillations, and these in turn induce resonance of the wheel web. Thus, wheel squeal noise is generated. In this study, laser cladding rail with composite material on the rail head was tested to prevent decrease of adhesion coefficient versus creepage. To make a composite rail specimen for test rig, composite material was cladded using high power diode laser. Four distinct types of composite material were processed to prepare rail disc specimens. To determine their effect on squeal noise reduction, adhesion coefficient and noise test were performed using a wheel / rail scale test rig. Lateral adhesion coefficient and squeal noise were also measured. Our results showed that steel rail disc had negative slope of adhesion coefficient and generated squeal noise in 2 kHz and 4 kHz. However, there was less or no negative slope when composite material rail specimen was used. Some cladded rail specimens had negative friction at higher degree of yaw angle than steel rail. Particularly, the specific test specimen exhibited excellent friction characteristic without decreasing the adhesion coefficient even when the yaw angle increased, and that specimen did not generate the squeal noise. Experimental results showed that it is possible to suppress the wheel squeal noise by changing the friction characteristics of the contact point by applying the composite material.

弯道尖叫噪声是车辆通过急半径弯道时铁路噪声中最大的噪声源之一。此外，它的高频和纯音成分给轨道周围的居民带来了很大的痛苦。尖叫噪音是由曲线中轮轨接触点的横向蠕变引起的。当铁路车辆通过急转弯时，横向爬电条件下的负摩擦引起粘滑振荡，进而引起轮辐共振。因此，产生车轮尖叫噪音。在这项研究中，测试了在轨头上使用复合材料的激光熔覆轨，以防止粘附系数与爬电距离的降低。为了制作用于试验台的复合钢轨试样，使用高功率二极管激光器熔覆复合材料。对四种不同类型的复合材料进行了加工以制备轨道盘试样。为了确定它们对减少尖叫噪音的影响，使用车轮/轨道秤测试台进行了附着系数和噪音测试。还测量了横向粘附系数和尖叫噪音。我们的结果表明，钢轨盘具有负的粘附系数斜率，并在 2 kHz 和 4 kHz 下产生尖叫噪声。然而，当使用复合材料钢轨试件时，负斜率较小或没有。一些包覆钢轨试样在比钢轨更高的偏航角下具有负摩擦。特别是，特定试验片即使在偏航角增大时也不会降低附着系数，表现出优异的摩擦特性，并且该试验片不产生尖叫噪音。