Assessment of micro-abrasive wear tribological properties of H10 tool-steel under conditions of ``constant normal force double right arrow variable pressure{''} and ``constant pressure double right arrow variable normal force{''}

Author(s)

Macedo, Marcelo de Matos ^[1] ; Humberto Luna-Dominguez, Jorge ^[2] ; Verma, Vikas ^[3] ; Schon, Claudio Geraldo ^[4] ; Cozza, Ronaldo Camara ^{[5, 6]}

Affiliation

^[1] UFABC Fed Univ ABC, Dept Mat Sci, R Abolicao S-N, BR-09210180 Santo Andre, SP - Brazil

^[2] Univ Autonoma Tamaulipas, Av Univ Esq COm Blvd, Adolfo Lopez Mateos S-N, Tampico 89337, Tamaulipas - Mexico

^[3] Natl Univ Sci & Technol MISIS, Thermochem Mat SRC, 4 Leninsky Prospect, Moscow 119049 - Russia

^[4] Univ Sao Paulo, Dept Met & Mat Engn, Av Prof Mello Moraes 2463, BR-05508030 Sao Paulo, SP - Brazil

^[5] CEETEPS State Ctr Technol Educ Paula Souza, Dept Mech Mfg, Av Antonia Rosa Fioravante 804, BR-09390120 Maua, SP - Brazil

^[6] Univ Ctr FEI, Educ Fdn Ignatius Priest Saboia de Medeiros, Dept Mech Engn, Av Humberto de Alencar Castel Branco 3972, BR-09850901 Sao Bernardo Do Campo, SP - Brazil

• Document type: Journal article
• Source: WEAR; v. 476, n. SI JUL 15 2021.
• Web of Science Citations: 0

Abstract

In industrial applications, tools of H10 tool-steel used in mechanical and metallurgical manufacturing processes, such as rolling, extrusion, forging, sheet metal stamping, milling and turning, frequently present significant levels of micro-abrasive wear, which occurs under specific circumstances of ``constant normal force{''}, resulting in a ``variable pressure{''} physical condition, or ``constant pressure{''}, resulting in a ``variable normal force{''} physical condition. Consequently, results of micro-abrasive wear generated under these tribological conditions can help engineers design materials and tools with a longer working life span when they are working under mechanical and metallurgical manufacturing processes. Observing the relevance of this subject, the purpose of this work is to assess the micro-abrasive wear tribological properties of H10 tool-steel submitted to experimental conditions of ``constant normal force double right arrow variable pressure{''} or ``constant pressure double right arrow variable normal force{''}. Ball-cratering wear tests were conducted on quenched and tempered AISI H10 tool-steel; the counter-body was a quenched and stressrelieved AISI 52100 bearing steel sphere and the abrasive slurries were prepared mixing abrasive particles of silicon carbide with distilled water. During the micro-abrasive wear tests, the abrasive slurry was, continuously, agitated and fed between the sphere and the tested material; values of coefficient of friction were, simultaneously, acquired, as well. After the tests, each wear crater was analyzed by optical microscopy, SEM and CAD software. The results were discussed based on the behavior of the ``Steady-State Wear Regime{''}, ``wear volume{''}, ``wear rate{''}, ``micro-abrasive wear modes{''}, ``pitch between grooves{''}, ``coefficient of friction{''} and, finally, validated by ANOVA. With the attainment of the Steady-State Wear Regime, it was possible to present the following conclusions: (i) wear volume and wear rate increased under conditions of ``constant pressure double right arrow variable normal force{''}, (ii) there was the predominance of ``grooving abrasion{''}, with the action of ``micro-rolling abrasion{''} wear phenomenon, (iii) the pitch between grooves presented, approximately, the same value of the average abrasive particles size and (iv) the coefficient of friction remained in a tribological condition classified, statistically, as ``constant{''}. (AU)

• FAPESP's process: 08/04477-8 - Upgrade of micro-abrasive wear test rig for the conduction of tests at constant pressure
• Grantee: Roberto Martins de Souza
• Support Opportunities: Regular Research Grants