Affiliation:
1. Scientific and Didactic Laboratory of Nanotechnology and Material Technologies, Faculty of Mechanical Engineering, Silesian University of Technology, Konarskiego 18a St., 44-100 Gliwice, Poland
Abstract
This paper describes the combination of surface engineering and powder metallurgy to create a coating with improved corrosion resistance and wear properties. A new method has been developed to manufacture corrosion-resistant surface layers on steel substrate with additional carbide reinforcement by employing a polymer-powder slurry forming and sintering. The proposed technology is an innovative alternative to anti-corrosion coatings applied by galvanic, welding or thermal spraying techniques. Two different stainless-steel powders were used in the research. Austenitic 316 L and 430 L ferritic steel powders were selected for comparison. In addition, to improve resistance to abrasive wear, coatings containing an additional mixture of tetra carbides (WC, TaC, TiC, NbC) were applied. The study investigates the effects of using multicomponent polymeric binders, sintering temperature, and atmosphere in the sintering process, as well as the presence of reinforcing precipitation, microstructure and selected surface layer properties. Various techniques such as SEM, EDS, hardness and tensile tests and corrosion resistance analysis are employed to evaluate the characteristics of the developed materials. It has been proven that residual carbon content and nitrogen atmosphere cause the release of hard precipitations and thus affect the higher mechanical properties of the obtained coatings. The tensile test shows that both steels have higher strength after sintering in a nitrogen-rich atmosphere. Nitrogen contributes over 50% more to the tensile strength than an argon-containing atmosphere.
Funder
Silesian University of Technology
Subject
General Materials Science
Reference47 articles.
1. German, R.M., and Bose, A. (1997). Injection Molding of Metal and Ceramics, Metal Powder Industries Federation.
2. Application of powder injection moulding and extrusion process to manufacturing of Ni-YSZ anodes;Matula;J. Achiev. Mater. Manuf. Eng.,2009
3. Metal injection moulding in Europe: Ten facts that you need to know;Petzoldt;Powder Inject. Mould. Int.,2007
4. (2023, May 30). Available online: https://mepsinternational.com/gb/en/products/world-stainless-steel-prices.
5. Šmak, M., Kubíček, J., Kala, J., Podaný, K., and Vaněrek, J. (2021). The Influence of Hot-Dip Galvanizing on the Mechanical Properties of High-Strength Steels. Materials, 14.