Effect of the post heat treatment on the sliding wear resistance of a nickel base coating deposited by high velocity oxy-fuel (HVOF)

Authors

  • P. Cadenas Escuela de Ingeniería Mecánica, Facultad de Ingeniería
  • M. Rodriguez Escuela de Ingeniería Mecánica, Facultad de Ingeniería
  • M. H. Staia Escuela de Ingeniería Metalúrgica y Ciencia de los Materiales, Facultad de Ingeniería,Universidad Central de Venezuela

DOI:

https://doi.org/10.3989/revmetalm.2007.v43.i1.51

Keywords:

Thermal spray coating, Comonoy 88, heat-treatment, oxyacetylene flame, wear performance

Abstract


In the present research, a nickel base coating was deposited on an AISI 1020 substrate by using high velocity oxy-fuel technique (HVOF). The coating was subsequently post heat -treated by means of an oxyacetylene flame. For the conditions evaluated in the present study, it was found that the CTT coating has 1,15 better wear resistance for the smaller level of the applied load and nearly 50 times for the highest level of the applied load when compared to the STT coatings. These results have been attributed to a better distribution of the hard phases, better cohesion between particles and an increase in hardness, as consequence of the post heat treatment process. A severe wear regime was found for all the samples since the wear rates presented values which were higher than 1·10-5 mm3/m. For the CTT coatings, the wear mechanism was mainly due to the adhesion and oxidation phenomena, meanwhile for the steel counterpart mechanisms such oxidation, grooving and three body abrasion were observed.

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References

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Published

2007-02-28

How to Cite

Cadenas, P., Rodriguez, M., & Staia, M. H. (2007). Effect of the post heat treatment on the sliding wear resistance of a nickel base coating deposited by high velocity oxy-fuel (HVOF). Revista De Metalurgia, 43(1), 50–62. https://doi.org/10.3989/revmetalm.2007.v43.i1.51

Issue

Vol. 43 No. 1 (2007)

Section

Articles

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