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Phase Diagrams and Tie Lines

Phase Diagrams and Tie Lines. Metallurgy Background 2. Learning Activities Look up Keywords View Slides; Read Notes, Listen to lecture View Demo Do on-line workbook Do homework. Lesson Objectives When you finish this lesson you will understand: Hypo and hyper euctectoid Steels

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Phase Diagrams and Tie Lines

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  1. Phase Diagrams and Tie Lines

  2. Metallurgy Background 2 • Learning Activities • Look up Keywords • View Slides; • Read Notes, • Listen to lecture • View Demo • Do on-line workbook • Do homework • Lesson Objectives • When you finish this lesson you will understand: • Hypo and hyper euctectoid Steels • How to calculate the percent of phases present in a Two phase region. Keywords: Hypo-eutectoid Steel, Hyper-eutectoid Steel, Tie line, Lever rule

  3. HYPOEUTECTOID STEEL Slow Cooled (Equilibrium) Phase Changes When Cooling From Austenite to Room Temperature

  4. Tie Line to Calculate % Ferrite and % Austenite Austenitie Ferrite Lever Rule Tie Line Demo

  5. Questions • Turn to the person sitting next to you and discuss (1 min.): • a hypereutectoid steel has carbon above 0.8%. What phase and percent phase do you expect at this tie line temperature?

  6. Demonstration A procedure called a “tie Line” can be used to determine the amount of each phase present in a Two Phase Compositional Region on a Phase Diagram. Please work the Demonstartion called “Phase Diagram Tie Line” found on the Demonstartion Page of the WE300 Website. Homework Please do Assignment 6 “Metallurgy” found on the Assignment Page. Note, it will help if you do the above Demonstration first.

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