Aluminum Production and Properties. Resistance Welding Lesson Objectives When you finish this lesson you will understand: Learning Activities 1.View Slides;

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Presentation transcript:

Aluminum Production and Properties

Resistance Welding Lesson Objectives When you finish this lesson you will understand: Learning Activities 1.View Slides; 2.Read Notes, 3.Listen to lecture 4.Do on-line workbook Keywords

Carbon Anode Aluminum Cathode Bauxite Alumina plus Fluoride salts CO 2 OAl Hall- Heroult Process Pxxyy xx = % Si Impurity yy = % Fe Impurity Grades Range From: P0202 to P1535 Typical Grade: P % Si & 0.20% Fe Additional Electrolytic Refining Available to get % Purity

Facility for producing aluminum sheet re-rolled directly from molten aluminum Metals Handbook vol 2, ASM

AWS Welding Handbook

Chemical Composition of Aluminum Alloys [Reference: Resistance Welding Manual, p.11-2, RWMA]

Classification of Aluminum Alloys Heat-Treatable Alloys –Can obtain increased strength levels through precipitation hardening –Typical hardening additions include copper, magnesium, zinc and silicon –These additions show increasing solid solubility with increasing temperature –Alloys of this type include the 2000, 6000 and 7000 series Non-Heat-Treatable Alloys –Strengthened by work- hardening and solid solution strengthening –Elements such as manganese, silicon, iron and magnesium are typical solid-solution hardening agents –Alloys of this type include the 1000, 3000, 4000 and 5000 series

Some Applications of Aluminum Alloys Heat-Treatable Alloys –2014 Hydraulic fittings for aircraft and automotive – Automotive Body –2219 tanks –6061 Structural –6101 Electrical Conductors –7075 High Strength Aircraft Non-Heat-Treatable Alloys –1060 Chem Processing Tanks –1100 Architectural –3003 General Purpose, Tanks –5052 Sheet Applications

Employing These Various Treatments Can Produce Aluminum Alloys With A Wide Range of Mechanical Properties As Observed in The Following Tables

Mechanical Properties of Some Aluminum Alloys [Reference: Resistance Welding Manual, p.11-12, RWMA]

Mechanical Properties of Some Aluminum Alloys (CONT.) [Reference: Resistance Welding Manual, p.11-12, RWMA]

Effect of Temperature on Mechanical Properties of Aluminum Alloys [Reference: Resistance Welding Manual, p.11-13, RWMA]

Effect of Temperature on Mechanical Properties of Aluminum Alloys (CONT.) [Reference: Resistance Welding Manual, p.11-13, RWMA]

Effect of Temperature on Mechanical Properties of Aluminum Alloys (CONT.) [Reference: Resistance Welding Manual, p.11-14, RWMA]

Mechanical and Physical Properties of Some Automotive Alloys [Reference: Guidelines to Resistance Spot Welding Aluminum Automotive Sheet, p.4, The Aluminum Association]