7-10 Materials Testing and Heat Treatment (Mech-362).pdf

Reference the testing inspection of engineering

  • No School
  • AA 1
  • 112

This preview shows page 44 - 48 out of 112 pages.

Reference:- The Testing & Inspection of Engineering Materials by Harme E. Davis 3 rd Edition Publisher : McGraw Hill Book Company. Materials and process by James F. Young 2 nd edition Publish by: Charles E Tuttle company Tokyo
Image of page 44

Subscribe to view the full document.

41 LESSONPLAN TITLE OF TOPIC [Short, Description] Lesson No: 21 Tempering Name: MUHAMMAD RAZZAQ KHAN SUBJECT: (Course Title) Mech.362 Instructor: Mechanical Time: 50 min . GENERAL OBJECTIVES: 01 Tempering objectives 02- Understand tempering method SPECIFIC OBJECTIVES: The student should be able to Expected Entry behaviors 01 Understand tempering objection To aware defects of hardening 02 Define tempering 03 Describe tempering 04- Describe mar tempering Time Allocated Topics ,NOTES ( Brief ) With teacher students activates Key points/ Reminders / Sketch Teaching Aids / Evaluation Tempering . Definition A low temperature heat treatment applied to fully hardened steel (a steel which have been heated into the austenitic region and water quenched to form martensite )Immediately after quenching , hardened steel is very brittle and carries high internal stresses these can reserlt in cracking or slow small Dimensional changes with time . Objectives of tempering . 01- To avoid cracking during service 02- Prepare springs 03- To convert complete martensite into some amount of martensite and bainite 04- Reduce brittleness 05- Increase toughness. 06- To produce proper hardness in cutting tools . 07- Enhance resistance against shocks .
Image of page 45
42 Topics ,NOTES ( Brief ) With teacher students activities Key points/ Reminders / Sketch Teaching Aids / Evaluation Types of tempering . 01- Austempering 02- Mar tempering Tempered martensite form in austempering also some amount of bainite form high tensile strength and ductility achieved Austempering . After hardening preheated the steel (below the lower critical temperature) in a furnace In heavy oil in a salt bath or in molten lead , it is held long enough for heat to penetrate thoroughly after that it is allowed to cool down in air .No hardest structure can be obtained Mar tempering . Also held in bath but not long so much long to form bainite . It is taken out to cool down in air to maintain the mastensite Testing & follow UP : [ to see if leaner acquainted information or skill ] Write down the tempering and its objection Special assignment: [ usually homework ] Explain austempering and martempering Tools materials & aids : White board and marker wall chart . Reference:- The Testing & Inspection of Engineering Materials by Harme E. Davis 3 rd Edition Publisher : McGraw Hill Book Company. Materials and process by James F. Young 2 nd edition Publish by: Charles E Tuttle company Tokyo
Image of page 46

Subscribe to view the full document.

43 LESSONPLAN TITLE OF TOPIC [Short, Description] Lesson No : 22 Annealing Name: MUHAMMAD RAZZAQ KHAN SUBJECT: (Course Title) Mech. 362 Instructor: Mechanical Time: 50 min.
Image of page 47
Image of page 48
  • Fall '19
  • Materials Science, Nondestructive testing, Rockwell scale, Vickers hardness test, Testing & Inspection of Engineering Materials

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern