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Lecture 6 Sept 6 - MSE 440/540 Processing of Metallic...

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NC State University Department of Materials Science and Engineering 1 MSE 440/540: Processing of Metallic Materials Instructors: Suveen Mathaudhu and Yuntian Zhu Office: 302E RBII / 308 RBII Ph: 549-4244 / 513-0559 [email protected] / [email protected] Lecture 6/7: Casting Methods Reading: Schey 7.5 – 7.9 Homework: Two Problems, Study Notes
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NC State University Department of Materials Science and Engineering 2 MSE 440/540: Announcements 1. Field Trip moving to Friday 9/16; time to be determined 2. Test Review moving to 9/8 3. Test moving to 9/13 4. No Class on 9/15 due to field trip 5. All lectures (1-6) now posted on website γ
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NC State University Department of Materials Science and Engineering 3 Casting Methods: Basics - Advantages - Intricate and small shapes - Any ferrous or non-ferrous material - Metal can be placed where required - Tooling is simple and inexpensive; good for small lots - Certain parts that can only be processed this way - Size and weight not a limitation - Limitations - Dimensional accuracy and surface finish - Labor intensive http://www.sfsa.org/tutorials/index.html
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NC State University Department of Materials Science and Engineering 4 Casting Alloys: History - 3200 BC – Copper Frog, cast in Mesopotamia - 233 BC – Cast iron plowshares poured in China - 1455 AD – Dillenburg Castle in Germany; first to use iron pipe to transport water - 1750 Benjamin Huntsmen invents cast crucible steel in England - 1896 America Foundry Society formed - 1996 – Cast metal matrix composites used in brake rotors for Lotus Elite
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NC State University Department of Materials Science and Engineering 5 Typical Sand Casting Operation
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NC State University Department of Materials Science and Engineering 6 Casting and Mold Terminology Six Basic Steps to Sand Casting 1. Pattern making 2. Core making 3. Molding 4. Melting and Pouring 5. Cleaning
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NC State University Department of Materials Science and Engineering 7
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