The present invention discloses a method for
smelting rust preventing and
wear resistant alloy on the surface of a steel rail. The position needing
alloy smelting on the surface of the steel rail head is heated by supersonic frequency or
medium frequency induction-heating equipment, the
induction heater is arranged above the position needing
alloy smelting on the surface of the steel rail head, and the preheating temperature is 290-450 DEG C; the alloy is smelted on the surface of the steel rail head by using
plasma smelting or
arc welding smelting, when the preheating temperature is 290-450 DEG C, and the
welding gun of
plasma build up
welding or
arc welding equipment is moved to the position needing alloy smelting, the alloy
powder, the
alloy electrode or the alloy
welding wire are automatically smelted; the railroad steel rail adopting the present invention can ensure that the
train wheels and the
rust preventing and
wear resistant alloy layer are always in a contacting and compacting state, thereby the rail circuit works normally, and the
white light zone phenomenon is completely eliminated; the
cracking and breaking phenomena of the steel rail do not occur, the smelted alloy has good
rust preventing and
wear resistant properties, high
bonding strength with the steel rail, and long service life.