Evaluation of the reduction products of a chromiferous concentrate in obtaining chromium carbide diffusive coatings

Authors

  • Jesús Eduardo González Ruiz
  • Rafael Quintana Puchol
  • Alejandro Rodríguez Cristo
  • Alejandro Duffus Scout

Abstract

The raw materials traditionally used as sources of chromium carriers (ferrochromium, chromium oxide and
chromium powder) in application chromizing processes present a high price and some difficulties for ferrochromium
grinding. In this work there is an assessment of the effect that has the use of the products of a reduction aluminothermic
chromium concentrate on the characteristics and properties of diffusive chromium carbide complex coatings. To assess
the coatings optical microscopy, micro – hardness test, Ray - X diffractometry and Energy Dispersive Ray - X Spectroscopy
was used. It has determined that the implementation of diffusive treatments using a treatment regimen of 1 000 oC
– 4 h giving complex carbides chromium coatings in three substrates researched (AISI 1055 steel, W108 tool steel and grey
cast iron). The layers do not differ by their morphology of those reported in previous work and are characterized as having
similar levels of microhardness and similar or high thicknessesthat achieved using conventional sources carrying chromium
in chromizing. Also coatings are highlighted by high contents of chrome that possess (among 65 and 71 % for steel
AISI 1055).In addition, it was found that mixtures of products made with the reduction of chromium concentrate possess
the ability to make chromium necessary for the normal development diffusive process with a durability of at least four
processes without the need for its revival, for the experimental conditions used.

Published

2020-12-28

How to Cite

González Ruiz, J. E. ., Quintana Puchol, R. ., Rodríguez Cristo, A. ., & Duffus Scout, A. (2020). Evaluation of the reduction products of a chromiferous concentrate in obtaining chromium carbide diffusive coatings. NATIONAL CENTER FOR SCIENTIFIC RESEARCH (CENIC) CHEMICAL SCIENCES JOURNAL, 40(3), 143-148. Retrieved from https://revista.cnic.edu.cu/index.php/RevQuim/article/view/836

Issue

Section

Research articles