Wear and corrosion resistance of Nb-V carbide layers produced in vermicular cast iron using TRD treatments
| Autor: | Gustavo Satoru Takeya, Luiz Carlos Casteletti, Carlos Alberto Picone, Fábio Edson Mariani, Amadeu Neto Lombardi |
|---|---|
| Přispěvatelé: | Universidade de São Paulo (USP), Univ Tecnol Fed Parana, Universidade Estadual Paulista (Unesp) |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
chemistry.chemical_element 02 engineering and technology engineering.material Indentation hardness Corrosion Carbide 0203 mechanical engineering Wear Aluminium Materials Chemistry Molten salt Boron Vermicular cast iron Metallurgy Surfaces and Interfaces General Chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Surfaces Coatings and Films 020303 mechanical engineering & transports chemistry engineering Cast iron 0210 nano-technology FERRO FUNDIDO Austempering TRD treatment |
| Zdroj: | Web of Science Repositório Institucional da UNESP Universidade Estadual Paulista (UNESP) instacron:UNESP Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual) Universidade de São Paulo (USP) instacron:USP |
| Popis: | Made available in DSpace on 2020-12-11T20:53:22Z (GMT). No. of bitstreams: 0 Previous issue date: 2020-09-15 Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Nb, V and Nb-V carbide layers were produced by means of the diffusion thermo-reactive treatment (TRD) in a vermicular cast iron, in baths composed of sodium borate, aluminum, ferro-niobium and/or ferro-vanadium, at 1000 degrees C with 2 h treatment time. Austempering was carried out after the TRD treatment in a molten salt bath at 300 degrees C. The samples were characterized by optical microscopy, XRD, Vickers microhardness, Daimler-Benz Rockwell-C, microadhesive wear tests and corrosion tests using potentiodynamic polarization tests. The TRD treatments were highly efficient in the production of uniform carbide layers, with thicknesses above 25 mu m and with good adhesions to the substrates. The layers showed hardness above 2300, 2500 and 3050 HV for the cases of Nb, V and Nb-V carbides, respectively. The wear resistance of the samples was increased from 10 to 30x in relation to the austempered substrate. The layers also showed corrosion resistance much higher than that of the substrate. The results obtained indicated the great effectiveness of the TRD treatment for the production of high performance carbide layers in vermicular cast iron. Univ Sao Paulo, Sao Carlos Sch Engn, Prod Engn Dept, 400 Trabalhador Saocarlense Ave, BR-13140170 Sao Carlos, SP, Brazil Univ Sao Paulo, Sao Carlos Sch Engn, Mat Engn Dept, 1100 Joao Dagnone Ave, BR-13140170 Sao Carlos, SP, Brazil Univ Tecnol Fed Parana, Mech Engn Dept, 3131 Pioneiros Ave, BR-86036370 Londrina, Parana, Brazil Sao Paulo State Univ, 56 Brasil Ave, BR-15385000 Ilha Solteira, SP, Brazil Sao Paulo State Univ, 56 Brasil Ave, BR-15385000 Ilha Solteira, SP, Brazil CAPES: 001 CNPq: 305294/2015-6 CNPq: 141416/2016-5 |
| Databáze: | OpenAIRE |
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