レーザクラッド法による炭素鋼表面の耐食・体磨耗肉盛層の形成

概要

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In order to improve the corrosion and wear resistances of carbon steel (SS400), laser cladding has been done to make a TiC particle-dispersed Ni-Cr composite layer by irradiating a CW CO_2 laser beam on a precoated powder layer, which consisted of the powder mixtures of Ni-Cr with 10,20,25,30,40,50,lOO mass% TiC. The optimum laser beam traveling speed to obtain a smooth surface layer decreased with the increase in TiC content in the powder mixture. The hardness of the composite layer increased with increasing TiC content to HV300,HV340-350 and HV390-420 for lO, 20,30 mass% TiC, respectively. The wear resistance of the composite layer increased with the increase in TiC content and that with 30 mass% TiC reached ten times as large as that of basemetal . The corrosion resistance of the composite layer was equaled to that of SUS304.
1998-05-05