Abstract
In order to control the shape and distribution of hard phases in a surfacing deposit, a longitudinal DC magnetic field was applied during plasma arc surfacing of low carbonsted with two iron based alloys (Fe 5 and Fe 3). Hardness and wear testing as well as microstructural X-ray diffraction analyses and microstructure of two surfacing deposits were investigated. The results show that the surfacing deposit subjected to a magnetic field exhibits higher hardness and better wear resistance than that produced without the application of magnetic field. When the magnetic field current is 3 A, properties of the surfacing deposit are optimal. Under this processing condition, both α and γ solid solutions are sufficiently refined and such hard phases as Cr7C3 and CrB can be obtained.
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