Acta Metallurgica Sinica (English Letters) ›› 2005, Vol. 18 ›› Issue (6): 695-700 .

• Research Articles • Previous Articles     Next Articles

STUDY ON PTA CLAD (Cr,Fe)7C3 /γ-Fe CERAMAL COMPOSITE COATING

J.B. Liu, J.H. Huang and L.M. Wang   

  1. Department of Mechanical and Electronic Engineering, Weifang University, Weifang 261061, China
  • Received:1900-01-01 Revised:1900-01-01 Online:2005-12-25 Published:2009-10-10
  • Contact: J.B. Liu

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Abstract: A wear resistant (Cr,Fe)7C3 /γ-Fe ceramal composite coating was fabricated on substrate of a 0.45%C carbon steel by plasma transferred arc (PTA) cladding process using the Fe-Cr-C elemental powder blends. The microstructure, microhardness and dry sliding wear resistance of the coating were evaluated. Results indicate that the plasma transferred arc clad ceramal composite coating has a rapidly solidified microstructure consisting of blocky primary (Cr,Fe)7C3 and the inter- blocky (Cr,Fe)7C3 /γ-Fe eutectics and is metallurgically bonded to the 0.45%C carbon steel substrate. The ceramal composite coating has high hardness and excellent wear resistance under dry sliding wear test condition.

Key words: plasma transferred arc (PTA) cladding, (Cr, Fe)7C3 /γ-Fe, coating

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