May 2021 Volume 3

MATERIALS

timely achieved in a way that is relevant to the conditions that apply during production.This TUS requirement is a frequent source of non- conformity findings during AMS 2750 audits. System Accuracy Test (SAT). This is a periodic test designed to validate that the equipment and systems used to acquire and process electrical data and convert and record that as temperature data, are accurate per spec AMS 2750 requirements. Tracking of all the calibration procedures to recognized standards is a strict requirement too. System Effectiveness and Uniformity Tests. A detailed tensile and a metallurgical testing are required by spec AMS 2772 to initially qualify an aluminum heat treating facility, and thereafter when major changes are made to the equipment. When quenching of sensitive alloys 2XXX or 7XXX is at the facility, additional and periodic metallurgical tests are also required to assess the effectiveness and uniformity of the quenching process. The purpose of these tests is to determine the capability of the heat treating unit to provide a specified temper to all the components in a given load and with full uniformity within each component of the load. Operating an aluminum heat treating facility requires personnel that is trained to identify and eliminate or reduce processing conditions with potential for yielding a non-compliant heat treatment operation. As customer requirements flowdown the floor, encountering a process instruction that is ill-defined is always a possibility which might

bring the operator´s criteria into the process execution, and having knowledge of the key elements that might be cause for invalidating a heat treating sequence is crucial to avoid major mistakes and to maintain a high yield and quality operation. ■ Specifications cited in this article: • AMS 2772. Heat Treatment of Aluminum Alloy RawMaterials. • AMS 2770. Heat Treatment of Wrought Aluminum Alloy Parts. • AMS 2750. Pyrometry. • AS 1990. Aluminum Alloy Tempers. • ASTMB247. Aluminum and Aluminum-Alloy Die Forgings, Hand Forgings, and Rolled Ring Forgings. Jorge A. Manriquez, PhD., is Sr. Specialist at Frisa Aerospace. Monterrey N.L, México.

Miguel A. Bocanegra, M.Sc., is Metallurgical Process Engineer at Frisa Aerospace. Monterrey N.L, México.

REPLACE EXISTING HIGH MAINTENANCE MAGNETIC SEPARATORS WITH THE WE-3 AIR-WASH SEPARATOR

High efficiency, reverse flow air wash technology Greater than 2,000 ft./min/ vs. traditional air wash at 300 ft./min.

Greater than 12” cleaning envelope No moving parts or maintenance Eliminates the need for swing baffles Requires less CFM than conventional Double Lip Separators

TM

SINTO AMERICA SINTOKOGIO, LTD. www.sintoamerica.com sales@sintoamerica.com 150 Orchard St. Grand Ledge, MI 48837 Tel 517.371.2460 Fax 517.371.4930

www.sinto.com

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FIA MAGAZINE | MAY 2021