Page 148 - 04. Subyek Engineering Materials - Manufacturing, Engineering and Technology SI 6th Edition - Serope Kalpakjian, Stephen Schmid (2009)

Qualitative Problems |27

KEY TERMS

Age hardening Distortion Maraging Solute
Aging End-quench test Martempering Solution treatment
Alloy Equilibrium diagram Martensite Solvent
Annealing Eutectic point Normalizing Spheroidite
Austenite Eutectoid reaction Overaging Stress relieving
Austempering Ferrite Pearlite Tempered martensite
Bainite Furnaces Phase diagram Tempering
Case hardening Hardenability Phase transformations Time-Temperature-
Cast iron Heat treatment Precipitation hardening transformation
Cementite Intermetallic compounds Pure metals diagrams
Curie temperature Iron-Carbon system Retained austenite Two-phase systems
Decarburization _Iominy test Solid solution

BIBLIOGRAPHY

ASM Handbook, Vol. 3: Alloy Phase Diagrams. ASM Heat Treater’s Guide: Practices and Procedures for Irons and
International, 1992. Steels. ASM International, 1995.
ASM Handbook, Vol. 4: Heat Treating. ASM International, Heat Treater’s Guide: Practices and Procedures for Non-
1991. ferrous Alloys. ASM International, 1996.
ASM Handbook, Vol. 9: Metallography and Microstructures, Krauss, G., Steels: Heat Treatment and Processing Principles.
ASM International, 2004. ASM International, 1990.
Brooks, C.R., Principles of the Heat Treatment of Plain Totten, G.E., Steel Heat Treatment Handbook, 2 Vols.,
Carbon and Low Alloy Steel, ASM International, 1996. 2nd ed., CRC Press/Taylor 86 Francis, 2007.
Bryson, WE., Heat Treatment, Selection, and Application of
Tool Steels, 2nd ed., Hanser Gardner, 2005.

REVIEW QUESTIONS

4.I. Describe the difference between a solute and a solvent. 4.8. What is the difference between “eutectic” and
“eutectoid”?
4.2. What is a solid solution?
4.9. What is tempering? Why is it performed?
4.3. What are the conditions for obtaining (a) substitutional
4.|0. Explain what is meant by “severity of quenching.”
and (bl interstitial solid solutions?
4.l I. What are precipitates? Why are they significant in
4.4. Describe the difference between a single-phase and a
precipitation hardening?
two-phase system.
4.I2. What is the difference between natural and artificial
4.5. Explain what is meant by “second-phase particle.”
aging?
4.6. Describe the major features of a phase diagram. 4.l3. Describe the characteristics of ferrite, austenite, and
4.7. What do the terms “equilibrium” and “constitutional,” cementite.
as applied to phase diagrams, indicate? 4.l4. What is the purpose of annealing?

QUALITATIVE PROBLEMS

4.l5. You may have seen some technical literature on prod- 4.|7. What is the difference between hardness and harden-
ucts stating that certain parts in those products are “heat ability?
treated.” Describe briefly your understanding of this term 4.l8. Referring to Table 4.1, explain why the items listed
and why the manufacturer includes it. under typical applications are suitable for surface hardening.
4.l6. Describe the engineering significance of the existence 4.l9. It generally is not desirable to use steels in their as-
of a eutectic point in phase diagrams. quenched condition. Explain why.