IndustrialHeating September 2011 : Page 5September 2011 • Vol. LXXIX • No. 9 CONTENTS Heat Treating On the Cover: The precision slot quench described in the article on p. 41 is shown. ARTICLES 41 Precision Quenching – Adding Science to Art Michael DiDonato – Thermatool Corp.; East Haven, Conn. With tube-and-pipe inventories drained from the 2009 recession, companies are trying to respond to increasing demands with new production facilities designed to boost harden and temper system efficiencies. Heat Treating 45 Quenchants Derived from Vegetable Oils as Alternatives to Petroleum Oil Ester Carvalho de Souza and Lauralice C.F. Canale – Universidade de São Paulo; São Carlos, SP. BRAZIL ; G.E. Totten – Portland State University; Portland, Ore. Properties of carbon and alloy steels vary with their composition and microstructures, which are dependent on the heat treatment and quenching process used. Vacuum/Surface Treating 51 Raw vs. Part Heat Treatments -What is the Difference? Robert Hill – Solar Atmospheres; Hermitage, Pa. FEA TURE The fuzzy definitions of “raw material” and “parts” in specifications create variable and debatable heat-treating quality standards. For years, military specification Mil-H-6875, often referred to as the bible of heat treating, never distinguished between the two. 55 Sintering/Powder Metallurgy Procedures for Reducing Atmosphere Consumption, Operating Costs James G. Marsden FAPMI and James G. Marsden II – F.A.S.T., Inc.; Brookville, Pa. This article describes methods to achieve atmosphere reduction during idle time, as well as the variables that must be controlled to produce a totally economical atmosphere system. While the procedures apply to P/M parts, they can be used for any continuous belt furnace application. 61 Heat & Corrosion Resistant Alloys/Composites Principles of Gas Nitriding (Part 3) Daniel H. Herring – The HERRING GROUP, Inc.; Elmhurst, Ill. This month, we focus on the materials used. Previous print articles have addressed the basics of the process (April) and the details of the process chemistry (May). IndustrialHeating.com -September 2011 5 Publication List Using a screen reader? Click Here |
