Properties of plasma sprayed NiCrAlY+£¨ZrO₂+Y₂O₃£© coating on refractory steel surface

À´Ô´ÆÚ¿¯£ºÖÐÄÏ´óѧѧ±¨(Ó¢ÎÄ°æ)2005ÄêµÚz2ÆÚ

ÂÛÎÄ×÷ÕߣºÂÀÌÎ ³Â·É ¶¡»ª¶« º«µ¤·ï

ÎÄÕÂÒ³Â룺246 - 249

Key words£ºrefractory steel£» plasma spraying£» NiCrAlY+£¨ZrO₂+Y₂O₃£©£» heat insulation effect

Abstract: NiCrAlY+£¨ZrO₂+Y₂O₃£©thermal barrier coating was prepared on the surface of refractory steel 1Cr18Ni9Ti with plasma spraying technique. The phases and microstructure of the thermal barrier coating were determined by scanning electron microscopy£¨SEM£© and X-ray diffraction£¨XRD£©. The results show that the bonding between thermal barrier coating and substrate is sound. The surface hardness of 1Cr18Ni9Ti reaches up to 1¤@000 HV, but that of substrate is only 300¤@HV. The patterns sprayed with CoNiCrAlY+£¨ZrO₂+Y₂O₃£© ceramic coating have a good heat insulation effect at 800¤@¡æ for heat insulation temperature difference reaches 54¤@¡æ, which increases the operating temperature and service life of refractory steel.