Section 3A Shaping Metals

Section 3A Shaping - Section 3 PROCESSING(Shaping Metal Alloys(Smith 6.1 How do we convert materials into useful forms Processing depends on

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Section 3 PROCESSING (Shaping) Metal Alloys (Smith 6.1) How do we convert materials into useful forms? Processing depends on application but similar underlying principles apply to all classes of materials
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Processing Criteria: performance requirements reliable, reproducible properties need controlled microstructures! cost of production raw materials, labor, utilities, tooling Fabrication Techniques : 1. Forming Extrusion Rolling •D r a w i n g Forging 2. Casting 3. Joining 4. Machining
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FORMING Hot working - above recrystallization temperature: material stays ductile Cold working - strain hardening , high quality surface Rolling - reduce thickness by compression of rollers Material experiences shape change by plastic deformation - material must be ductile: metals, polymers
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FORMING (cont’d.) Drawing - Sheet metal forming Drawing Extrusion die and punch, stamping push or pull material complex cross-section
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9 Drawing & dome forming 9 Trimming, cleaning & decorating 9 Neck & flange forming Formed Aluminum Beverage Can
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FORMING (cont’d.) Forging - “work” material into desired shape (blacksmithing, anvil, hammer) wrought alloys
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Forging: strike (hot) metal with hammer Drop forging – compress with dies * often stronger than cast or machined metals improved strength WHY?
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This note was uploaded on 04/02/2008 for the course MATE 210 taught by Professor Niebuhr during the Spring '05 term at Cal Poly.

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Section 3A Shaping - Section 3 PROCESSING(Shaping Metal Alloys(Smith 6.1 How do we convert materials into useful forms Processing depends on

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