The arc sprayform process is a new method for the economic,rapid manufacture of forming a shell of several centimeters thickness,in which the molten droplet spray is created by a DC arc between two consumable conductive wires of the raw materials.Arc sprayed coatings have a characteristic lamellar microstructure that typically contains a high proportion of inter-splat porosity and oxide stringers.Not only does oxide decrease toughness,it also affects the residual stress and mechanical properties.This paper describes the development of FeCrBSiMnNbY amorphous and nanocrystalline coating obtained from twin cored wire electric arc spraying technology,which aims to decrease the oxide content with compress air.The sprayed metal acts as the source of mass and heat,because the molten droplets transfer their heat to the spray formed metal shell as they cool and solidify,and will result in tensile thermal quenching stresses developing in the shell.Four pre-determined,repetitive manners referred to as the “path-plan” are proposed,which are optimized to ensure even mass coverage and minimize temperature variations.The surface temperature is directly measured by a thermal imaging camera during spraying.Unlike welding,only the time domain affects heat and cool process,the relatively dispersive arc will result in spatial thermal variation.Boitzmann fitting curve is adopted as the characteristic parameter of surface temperature cycle.The “mirror” path has been shown to improve the uniform of surface temperature compared with “Zip” type,“ring outward” and “ring inward” paths.The effect of path-plans on residual stress is also carried out using a X-ray residual stress tester.The results show that the coating prepared by the “mirror” path has the minimum residual stress,and its distribution is the most uniform,so it should be the optimal for arc sprayform among the four paths studied.