Investigation on wear resistance of Fe-based composite material containing titanium

A series of Fe-Cr-Ti-C hardfacing alloys with different Cr contents were prepared by PTA in order to develop a Fe-based wear resistant composite material.The microstructure and carbides morphology were investigated by means of scanning electron microscopy(SEM) and X-ray diffraction(XRD).The results show that the matrix transforms from austenite and ferrite to ferrite and martensite,the volume fraction of M₇C₃ and TiC increase with the Cr content being increased.In addition,the effects of Cr content on wear resistance were studied.The wear resistance of cladding layer increases with increase of Cr content.When Cr content is 20.1%,the microstructure characteristic with a high volume fraction of hexagonal M₇C₃ complex carbides and a small amount globular,exploded and agglomerated TiC particles are distributed in the lath martensite matrix with higher strength and toughness,which suggests that the cladding layer has a excellent wear resistance.