Affiliation:
1. Hyundai Motors Technical Research Laboratory
2. Pohang University of Science and Technology (POSTECH)
3. Pohang University of Science and Technology
Abstract
The present study is concerned with the improvement of hardness and wear resistance in
(Cr3C2,CrB)/carbon steel surface composites fabricated by high-energy electron beam irradiation.
Two kinds of powder mixtures, 50Cr3C2-50STS304 and 50CrB-50STS304 (wt.%), were placed on a
plain carbon steel substrate, which was then irradiated with electron beam. The surface composite
layer of 1.0~1.3 mm in thickness was successfully formed without defects, and contained a large
amount (up to 58 vol.%) of Cr7C3 or Cr1.65Fe0.35B0.9 particles in the austenite or martensite matrix.
The hardness and wear resistance of the surface composites were 2~3 times higher than those of the
steel substrate according to hard particles. Particularly, the surface composite fabricated with CrB
powders showed excellent wear resistance because selective wear of the matrix was considerably
reduced.
Publisher
Trans Tech Publications, Ltd.
Subject
Mechanical Engineering,Mechanics of Materials,General Materials Science
Reference8 articles.
1. E. Rimini, in: Surface Modification and Alloying by Laser, Ion, and Electron Beams, edited by J.M. Poate, G. Foti, and D.C. Jacobson, Plenum Press, New York (1983), p.15.
2. M. Bauccio : ASM Engineered Materials Reference Book, 2nd ed. (ASM Intern., Materials Park, OH 1994).
3. ASTM Standard Practice for Conducting Dry Sand/Rubber Wheel Abrasion Tests, ASTM G65-85 (ASTM, Philadelphia, PA 1985).
4. W.L. Song, P.D. Zhu and K. Cui: Surf. Coat. Tech. Vol. 80 (1996), p.279.
5. K. -S. Park, D. -S. Bae, S-K. Lee, G. -H. Lee, K. -H. Kim and T. Endo: Met. Mater. Int. Vol. 12 (2006), p.385.