By　specially　designing　the　cladding　head,　the　optimal　coupling　of　laser　beam　and　powder　flow　could　be　achieved　in　the　newly　developed　high　speed　laser　cladding　(HSLC)　process.　Using　such　head,　the　particles　melt　in　flight　while　the　surface　of　substrate　forms　a　micro-melt　pool,　so　that　a　coating　with　metallurgical　bonding　can　be　obtained　due　to　the　high　deposition　speeds　and　powder　utilization　rate.　As　a　result,　producing　high　quality　coatings　with　thickness　2O3)　forms　by　pre-oxidation.　Overall,　the　coatings　with　low　dilution　ratio　prepared　by　HSLC　exhibit　good　protection　for　the　substates　studied.　©　2020,　Editorial　Office　of　CHINA　SURFACE　ENGINEERING.　All　right　reserved.