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Open AccessArticle

Development of a Novel Resistance Heating System for Microforming Using Surface-Modified Dies and Evaluation of Its Heating Property

Tokyo Metropolitan University, Tokyo 191-0065, Japan
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Author to whom correspondence should be addressed.
Metals 2019, 9(4), 440; https://doi.org/10.3390/met9040440
Received: 20 March 2019 / Revised: 7 April 2019 / Accepted: 11 April 2019 / Published: 15 April 2019
(This article belongs to the Special Issue Metal Micro-forming)
For this study, a novel resistance heating system for microforming was developed using surfaces of forming dies as heating resources. The electrical resistance of the die surfaces was designed and the hard-coating material AlCrSiN was selected to coat the die surfaces for heating. To clarify the effects of the thickness and modified surfaces on heating efficiency, the temperature and stress reduction were evaluated in a micro-compression test using dies coated with 0.5 and 1 μm AlCrSiN films. Furthermore, the formability was also demonstrated using 1 μm thick AlCrSiN-coated tools in a microforging test. By applying surface-modified dies to the forming processes, we found that not only was the heating efficiency improved, but also the dependence of heating on the product’s shape and the material’s electrical properties was reduced. View Full-Text
Keywords: resistance heating system; surface modification; microforming resistance heating system; surface modification; microforming
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MDPI and ACS Style

Yang, M.; Shimizu, T. Development of a Novel Resistance Heating System for Microforming Using Surface-Modified Dies and Evaluation of Its Heating Property. Metals 2019, 9, 440. https://doi.org/10.3390/met9040440

AMA Style

Yang M, Shimizu T. Development of a Novel Resistance Heating System for Microforming Using Surface-Modified Dies and Evaluation of Its Heating Property. Metals. 2019; 9(4):440. https://doi.org/10.3390/met9040440

Chicago/Turabian Style

Yang, Ming; Shimizu, Tetsuhide. 2019. "Development of a Novel Resistance Heating System for Microforming Using Surface-Modified Dies and Evaluation of Its Heating Property" Metals 9, no. 4: 440. https://doi.org/10.3390/met9040440

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