Abstract
Microstructure and properties of structural steel layers subjected to overlay welding utilizing materials powder as well as elect of hardness and microstructure on adhesive wear are investigated. Materials powder spread over the Ct3 steel surface or mixed with the AMS1 flux was melted in low carbon wire Cb 08 arc. The powder of alloying elements Cr, Mo, W, Co and Fe-60%V, Fe 70% Mn, B4C, WC-8%Co and of secondary raw materials (glass, grinding wheels, hard metal plates) was used for overlay welding. Depending on the used powder composi tion and heat treatment, alloyed, hard (to 68 HRC) layers, which wear resistance is similar to standard tool steel, are obtained.http://dx.doi.org/10.5755/j01.mech.17.2.340
Highlights
Hardfacing is one of the most useful and economical ways to improve the performance of components submitted to severe wear conditions
WC-8 Co powder spread over the Cɬ3 steel surface and melted in Cɜ08 wire arc under flux AMS1 containing graphite resulted hard (Table 3), and many carbides containing layers (Fig. 2)
Cɜ 08 wire arc powder spread over the Cɬ3 steel surface without flux the Cɬ3 steel surface containing 60 P6M5 steel chips
Summary
Hardfacing is one of the most useful and economical ways to improve the performance of components submitted to severe wear conditions. The microstructure of overlays is more important than the hardness is determing the low abrasive wear resistance of iron based hardfacing alloys. The abrasive wear resistance of the weld overlay coating containing primary carbides M7C3 depend on the size of carbides and strength of the matrix [6]. The best results are obtained when hard carbide particles are inserted into the mild steel subjected to overlaying welding matrix. The objective of this investigation is to analyze properties and microstructure of the layers produced using powder materials as well as effect of heat treatment and effect of chemical composition and microstructure on adhesive wear
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