Version 1
: Received: 16 November 2018 / Approved: 19 November 2018 / Online: 19 November 2018 (10:32:44 CET)
How to cite:
Gobbi, S.J.; Gobbi, V.J.; Reinke, G. Ultra Low Temperature Process Effects on Micro-Scale Abrasion of Tool Steel AISI D2. Preprints2018, 2018110448. https://doi.org/10.20944/preprints201811.0448.v1
Gobbi, S.J.; Gobbi, V.J.; Reinke, G. Ultra Low Temperature Process Effects on Micro-Scale Abrasion of Tool Steel AISI D2. Preprints 2018, 2018110448. https://doi.org/10.20944/preprints201811.0448.v1
Gobbi, S.J.; Gobbi, V.J.; Reinke, G. Ultra Low Temperature Process Effects on Micro-Scale Abrasion of Tool Steel AISI D2. Preprints2018, 2018110448. https://doi.org/10.20944/preprints201811.0448.v1
APA Style
Gobbi, S.J., Gobbi, V.J., & Reinke, G. (2018). Ultra Low Temperature Process Effects on Micro-Scale Abrasion of Tool Steel AISI D2. Preprints. https://doi.org/10.20944/preprints201811.0448.v1
Chicago/Turabian Style
Gobbi, S.J., Vagner João Gobbi and Gustavo Reinke. 2018 "Ultra Low Temperature Process Effects on Micro-Scale Abrasion of Tool Steel AISI D2" Preprints. https://doi.org/10.20944/preprints201811.0448.v1
Abstract
Ultra Low Temperature Process (ULTP) involve the material cooling in temperatures close to the liquid nitrogen (-196 °C), which is different from the cold-treatment (CT) made in temperatures close to -80 °C. ULTP treatments could raise the tool steel wear resistance through microstructural change that occurs on the material, enhancing, that way, the tools and dies lifetime. To investigate the impact on the wear resistance of tool steel AISI D2, micro abrasive wear tests were carried out and an analysis based on the Archard’s law was considered, evaluating specimen mass loss by laser interferometry. Micro hardness tests, X-ray diffractometry, scanning and optical microscopy and quantitative evaluation of carbides with image analysis were carried out aiming material characterization. Micro-scale abrasion tests shown a wear coefficient k about 1.73E-7 e 2.61E-7 mm3/N.mm to the specimens that received the ULTP phase and 3.12E-7 mm3/N.mm to the conventional thermal treatment, representing a wear resistance increase of 16.3 – 44.5% to cryogenically treated specimens. The results demonstrated a micro hardness improvement, ranging from 0.9 - 4.7% for the cryogenically treated specimens, when compared to the bulk material. This effect is related, mainly, to the retained austenite transformation in martensite and to the increase in the amount of fine secondary carbides dispersed in the martensitic matrixes of cryogenically treated specimens with ULTP. The best wear resistance improvements, on micro-scale, were achieved when the ULTP step is performed immediately after tempering.
Keywords
Micro-Scale Abrasion; Ultra Low Temperature Process (ULTP) Tool Steel AISI D2;
Subject
Engineering, Mechanical Engineering
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
