Experimental study on dry friction characteristics of titanium alloy TC11 before and after laser beam quenching

Titanium alloy is a wide used as the blade material in aeroturbine. This paper reported the experimental results of wear capacity of bearing steel GC15 ball on Ti alloy disk processed by laser beam quenching (LBQ) or not,at the friction temperature of room temperature,150℃, 300℃, 450℃.With the increasing of the f riction temperature from room temperature up to 300℃,the wear rate of surface of Ti alloy increased.The scanning electron micrography proved that the large amount of Fe was found in worn zone of Ti alloy.But it was low greatly at 450℃,and the X-ray photography indicated that an oxide film called glazing layer,which consisted of TiO2,Al2O3 and Fe2O3, formed to resist being worn.By using LBQ,the wear resistance of Ti alloy to dry friction at 150℃ and 300℃ was greatly improved, but there was no obvious improvement at room temperatu re and 450℃.