Bertrand Ph., Movchan I., Samodurova M.N., Dzhigun N.S. Laser cladding as a perspective surface hardening technique for die tooling

Abstract

The present study looks at the main surface hardening techniques used for die tooling and mill rolls. Among various physical techniques, laser-assisted coating deposition (or laser cladding) is worth special attention due to its multiple advantages. Laser cladding offers a high efficiency (up to 150cm3/h of the deposit) and versatility in terms of coating thickness (0.1–1.0 mm) and applicable materials (Fe-based, Co-based, Ni-based alloys etc.). Moreover, laser cladding offers the possibility to produce multi-material coatings with enhanced properties such as wear-, heat- and shock-resistance. Considering the afore-mentioned advantages, a hypothesis was suggested regarding the possibility of obtaining coatings with advanced, physical properties through laser cladding. The purpose of the study is to provide an overview of the key techniques behind enhancing the surface mechanical properties and to study the process of laser cladding with cobalt- based powder containing a reinforcing phase as a perspective technique for enhanced die tool performance. The experimental section of the study is concerned with the laser cladding process used for the production of metal-ceramic composite coatings. Coatings were obtained which consist of a matrix built with a cobalt alloy and a titanium carbide reinforcing phase. Key physical properties of such coatings were studied. Although the application of heat-resistant cobalt-based alloys for die tool protection is of high relevance, its industrial application is rather limited. It is obvious that such die tool protection techniques will be in high demand in the future. However, a large-scale experiment is necessary to optimize the laser cladding process and to identify the proper composition of the powder mixture.

Keywords

Powder metallurgy, die tooling, thermal treatment, chemical thermal treatment, laser cladding, stellite, titanium carbide.

Philippe Bertrand – Ph.D., Professor, National Engineering School of Saint Etienne. Director of Education and Innovations, Director of Studies in Additive Technologies and Surface Engineering, France. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it..

Igor Movchan – Ph.D. (Physics and Mathematics), responsible for research projects at the National Engineering School of Saint Etienne, France. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it..

Samodurova Marina Nikolaevna – Ph.D. (Eng.), Assistant Professor, South Urals State University, Chelyabinsk, Russia. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it..

Dzhigun Nikolay Sergeevich – Postgraduate Student, South Urals State University, Chelyabinsk, Russia. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it..

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Details: Published: 27 June 2016; Last Updated: 17 November 2016; Hits: 2747