［Abstract］ A self-shielded flux with Fe，Cr，Ni and so on was welded onto 45 steel substrate and prepared to iron-based surfacing welding coating． The macro-morphology and welding process conditions were assessed． The phase composition and microstructureof the surfacing coating were characterized． And it＇s hardness，wear resistance，corrosion resistance，thermal stability，crack resistance，self-protective properties，etc were studied． The results show that welding coating contains amorphous，with good wear-resistant，crack resistance，corrosion resistance，and good thermal stability，welding process performance，excellent comprehensive properties．
［Key words］ self-shielded flux; surfacing coating; amorphous; high wear resistance; high hardness
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