Study on C/S interface in Fe based high carbon Nb-Ti-V alloyed surfacing welding layer

The C/S interface(interface between particulate carbide and solid solution) was investigated in Fe based high carbon Nb-Ti-V alloyed surfacing metal by means of SEM and TEM.It was indicated that the C/S interface was clean and free from other reactants,and mismatch between the two crystals was δ=(6.18.3)%,and there existed a crystal parallel relationship on the C/S interface:(002)_α-Fe//(220)_(NbTiV)C.It was also demonstrated by wear testing on the MM200 type wear machine that the two phase bound each other strongly on the C/S interface,which prevented the disbanding of carbides and provided the surfacing metal with better wear resistance than that of American MG700.