Research of Erosion Sesistance of HVOF-sprayed Fe-Al/Cr_3C_2 Composite Coating
The Fe-Al/Cr3C2 composite coating was made in the 20 steel by HVOF. The erosion sesistance of HVOF-sprayed Fe-Al/Cr3C2 were researched. The coatings surface was analysed by SEM. The results show that the erosion mechanism of HVOF-sprayed Fe-Al/Cr3C2 is brittleness?brittleness-ductile and ductile at 300℃?450℃ and 650℃.Impingement angles do effects to erosion resistance, the erosion resistance of HVOF-sprayed Fe-Al/Cr3C2 at 30°impingement angles is better than that at 90°. The erosion resistance of HVOF-sprayed is enhanced with the temperature increasing.