Heat resistance steel type of H13 is used for theaircraft structure parts whose working temperature is 400~500℃Moreover

it is required to wear resistance for the parts in some specialservice environments In order to solve the problem of wear failure in hot workdies during service

a low power laser type of Nd：YAG was used to cladding SiC ceramics on thesurface of H13 steel The macroscopic feature

microstructures and compositionswere observed by the metalloscope

scanning electron microscope and energydepressive spectroscopy Experimental results indicated that that the crosssections of the cladding sample were markedly divisional (Clad Zone

Fusionzone

Heataffected zone

Substrate Zone) The microstructure of cladding layeris nondirectional and compact

without obvious crack and porosity and with goodperformance The homogeneous microstructure of bonding layer is dendrite andequiaxed grain with small size

and the massive columnar crystal grew from thebond line of H13 steel substrate to fusion zone The wear resistance of lasercladding ceramics on heat resistance steel surface is analyzedBesides

athrough crack appeared after the scanning speed up to 40mm/min、60mm/min on the cladding layer asthe hard and brittle characteristic of SiC ceramics and the difference ofthermal expansion coefficient between SiC ceramics and substrate; The aboveresearch results provide some theoretical support for improving the surfacewear resistance of aircraft heatresistant parts.