Author(s)

T. Sakamoto, M. Hasegawa, S. Kakunai & M. Abo

Abstract

Laser clad lubricant layer with graphite/BN T. Sakamoto, M. Hasegawa, S. Kakunai, M. Abo Department of Mechanical Engineering, Faculty of Engineering, Himeji Institute of Technology, Himeji, Hyogo 671-22, Japan ABSTRACT A composite thin clad layer containing graphite and hexagonal boron nitride powders was tried to form on stainless steel using a continuous-wave C0~ gas laser. The layer formed only with boron nitride has no appreciable effect on friction reduction. Increase in graphite content in the coatings led to lower friction. A good lubricant layer with the lowest friction and the longest life was obtained from the powder mixture with higher graphite content about 90 vol.%. 1. INTRODUCTION Laser beam melts a very thin surface layer of the substrate. The molten top layer mixes with the molten cladding materials or permeates into the cladding powder with high melting point, and subsequently freezes. This process can form a good bonding b

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