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1-3 of 3
William R. Jones
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Proceedings Papers
HT2017, Heat Treat 2017: Proceedings from the 29th Heat Treating Society Conference and Exposition, 545-549, October 24–26, 2017,
Abstract
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A new high strength and energy efficient graphite board (HEFVAC) was introduced in fall 2016 as a vacuum furnace insulation package, which has evolved with the goal of further reducing power consumption. The unique features of the HEFVAC material offer a new approach to the design and construction of a vacuum furnace hot zone. Our presentation will document the thermal advantages of the HEFVAC board as well as introduce a new hot zone design that integrates the board into a self-supporting structure. This new design offers greatly improved thermal efficiency, resulting in reduced power usage compared to current vacuum furnace hot zones.
Journal Articles
Journal: AM&P Technical Articles
AM&P Technical Articles (2017) 175 (4): 56–58.
Published: 01 May 2017
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A novel hot zone design featuring new graphite boards reduces heat loss and improves overall hot zone power requirements.
Series: ASM Handbook
Volume: 4B
Publisher: ASM International
Published: 30 September 2014
DOI: 10.31399/asm.hb.v04b.a0005955
EISBN: 978-1-62708-166-5
Abstract
Vacuum heat treating consists of thermally treating metals and alloys in cylindrical steel chambers that have been pumped down to less than normal atmospheric pressure. This article provides a detailed account of the operations and designs of vacuum furnaces, discussing their pressure levels, resistance heating elements, quenching systems, work load support, pumping systems, and temperature control systems. It describes the classification of instruments used for measuring and recording pressure inside a vacuum processing chamber. Common devices include hydrostatic measuring devices and devices for measuring thermal and electrical conductivity. The article also describes the applications of the vacuum heat treating process, namely, vacuum nitriding and vacuum carburizing. Finally, it reviews the heat treating process of tool steels, stainless steels, Inconel 718, and titanium and its alloys.
