Erosive Wear Study of the AISI 201LN Stainless Steel: A Comparison with the AISI 304 and AISI 410 Stainless Steels
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INTRODUCTION
EROSIVE wear is caused by hard particles striking the surface, either carried by a gas stream or a liquid flow.[1,2] It is a common phenomenon in mining and agroindustry processes, mainly where materials transfer
ANA PAULA MARQUES DE OLIVEIRA is with the Department of Chemical Engineering, Federal University of Minas Gerais (UFMG), Avenida Presidente Antoˆnio Carlos, 6627, Campus UFMG, Escola de Engenharia, bloco 2, 5° andar, Belo Horizonte, MG CEP: 31270-901, Brazil. Contact e-mail: [email protected] MANUEL HOUMARD is with the Department of Materials Engineering and Civil Construction, Federal University of Minas Gerais (UFMG), Avenida Presidente Antoˆnio Carlos, 6627, Campus UFMG, Escola de Engenharia, bloco 1, sala 3304, Belo Horizonte, MG, CEP: 31270-901, Brazil. WILIAN DA SILVA LABIAPARI is with the R&D of Aperam South America, Prac¸a 1° de Maio, 9, Centro, Timo´teo MG CEP: 35.180-018, Brazil. CRISTINA GODOY is with the Department of Metallurgical Engineering and Materials, Federal University of Minas Gerais (UFMG), Avenida Presidente Antoˆnio Carlos, 6627, Campus UFMG, bloco 1, sala 1804, Escola de Engenharia, Belo Horizonte, MG CEP: 31270-901, Brazil. Manuscript submitted August 21, 2018.
METALLURGICAL AND MATERIALS TRANSACTIONS A
occurs (e.g., chutes). In some parts of the chute equipment, the iron core particles flow, for example, strikes the equipment surface, applying a contact force during a long period of time, which leads to an erosive wear of the structural material used. The erosive wear intensity depends on the number, mass, velocity, and hardness of the individual particles striking the surface, as well as their impact velocity. These characteristics define the erosive wear problems.[1,2] Several factors and parameters of the tribological system influence the erosion mechanism. Thus, the knowledge of the mechanical and metallurgical characteristics of the involved materials is fundamental for such a study.[3] The concern in studying stainless steels for applications in areas, such as mining and agroindustry, is that in addition to wear resistance, it is necessary to use materials that are resistant to corrosion due to the presence of humidity in these processes.[4] In studies carried out by Aperam in the Valemix Mining Company,[5] the performances of both AISI 410 and carbon steels were compared. In this work, the carbon steel with an initial thickness of 6 mm reaches, after 6 months of use, a thickness ranging from 1 to 3 mm, owing to a
severe wear in an environment combining the corrosion and abrasion phenomena. On the other hand, for AISI 410 stainless steel with an initial thickness of 4.75 mm, a reduction of only 0.3 mm has been observed. In this application, mechanical strength and good corrosion resistance enable a significant increase in durability, making the stainless steel highly competitive and the best alternative for such industrial applications. In addition, due to its higher mechanical resistance, smaller thicknesses are required. Thus, the expanded stainless st
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