TY - JOUR

T1 - Influência da operação de roleteamento sobre a integridade superficial do aço abnt 1020

AU - Santos, Filipe Figueiredo Dos

AU - Silva, Sandro da Costa

AU - Abrão, Alexandre Mendes

AU - Denkena, Berend

AU - Breidenstein, Bernd

AU - Meyer, Kolja

N1 - Funding Information: Este trabalho foi realizado com apoio da Coordenação de Aperfeiçoamento de Pessoal de Nível Superior-Brasil (CAPES)-Código de Financiamento 001 e também por intermédio do programa BRAGECRIM-Ini-ciativa Brasil-Alemanha para Pesquisa Colaborativa em Tecnologia de Manufatura (projeto 029/14). Os auto-res agradecem ao Programa de Pós-Graduação em Engenharia Mecânica da UFMG pelo apoio à realização deste projeto, à professora Elaine Carballo Siqueira Corrêa do Departamento de Engenharia de Materiais do Centro Federal de Educação Tecnológica de Minas Gerais (CEFET-MG) pela disponibilização do Laborató-rio de Tratamentos Térmicos e orientações e à professora Geralda Cristina Durães de Godoy do Departamen-to de Engenharia Metalúrgica e de Materiais da UFMG pela disponibilização do Laboratório de Tribologia e Corrosão de Materiais. Experimentos e análises envolvendo microscopia eletrônica foram realizados no Centro de Microscopia da Universidade Federal de Minas Gerais, Belo Horizonte, Brasil (http://www.microscopia.ufmg.br).

PY - 2020/7/24

Y1 - 2020/7/24

N2 - Surface integrity refers to a set of characteristics of the surface and subsurface layer that have great influence on the functional performance of mechanical components under conditions of wear, corrosion and fatigue, and is determined by the manufacturing processes employed. Thus, surface treatments are used to generate a surface integrity suited to the desired function. Deep rolling is one of the surface treatments that involve cold working of the surface and subsurface layer. This work addresses the influence of some deep rolling parameters (pressure, speed, feed and number of passes) on the surface integrity (roughness, surface and subsurface microhardness and microstructure) of AISI 1020 low carbon steel. A significant improvement on surface finish was observed after deep rolling, however, the excessive increase in pressure and in feed caused an increase in roughness. Regarding the surface microhardness, it was reduced or remained stable after deep roll-ing. In addition, under all conditions tested deep rolling promoted an increase in the microhardness of the subsurface layer and in the affected depth in comparison to the specimen only turned. However, an elevation in pressure further increased the subsurface microhardness and the affected depth and the subsurface micro-hardness increased slightly with higher feeds and reduced with increasing number of passes, along with the affected depth. Finally, the microstructural analysis showed that deformation increased with pressure and number of passes and reduced with the elevation of speed and feed.

AB - Surface integrity refers to a set of characteristics of the surface and subsurface layer that have great influence on the functional performance of mechanical components under conditions of wear, corrosion and fatigue, and is determined by the manufacturing processes employed. Thus, surface treatments are used to generate a surface integrity suited to the desired function. Deep rolling is one of the surface treatments that involve cold working of the surface and subsurface layer. This work addresses the influence of some deep rolling parameters (pressure, speed, feed and number of passes) on the surface integrity (roughness, surface and subsurface microhardness and microstructure) of AISI 1020 low carbon steel. A significant improvement on surface finish was observed after deep rolling, however, the excessive increase in pressure and in feed caused an increase in roughness. Regarding the surface microhardness, it was reduced or remained stable after deep roll-ing. In addition, under all conditions tested deep rolling promoted an increase in the microhardness of the subsurface layer and in the affected depth in comparison to the specimen only turned. However, an elevation in pressure further increased the subsurface microhardness and the affected depth and the subsurface micro-hardness increased slightly with higher feeds and reduced with increasing number of passes, along with the affected depth. Finally, the microstructural analysis showed that deformation increased with pressure and number of passes and reduced with the elevation of speed and feed.

KW - AISI 1020 steel

KW - Deep rolling

KW - Microhardness

KW - Roughness

KW - Surface integrity

UR - http://www.scopus.com/inward/record.url?scp=85088555523&partnerID=8YFLogxK

U2 - 10.1590/s1517-707620200002.1051

DO - 10.1590/s1517-707620200002.1051

M3 - Article

AN - SCOPUS:85088555523

VL - 25

JO - Revista Materia

JF - Revista Materia

SN - 1517-7076

IS - 2

M1 - e-12651

ER -