Manufacturing Engineering & Technology
7th Edition
ISBN: 9780133128741
Author: Serope Kalpakjian, Steven Schmid
Publisher: Prentice Hall
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Chapter 4, Problem 20QLP
To determine
It generally is not desirable to use steels in their as quenched condition. Explain why.
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3. List as many problems encountered with water-hardening
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Use the TTT diagram for O1 Tool steel provided above to estimate the amounts ofpearlite and martensite formed in the quenched heat-treated samples.
Chapter 4 Solutions
Manufacturing Engineering & Technology
Ch. 4 - Describe the difference between a solute and a...Ch. 4 - What is a solid solution?Ch. 4 - Prob. 3RQCh. 4 - Describe the difference between a single-phase and...Ch. 4 - What is an induction heater? What kind of part...Ch. 4 - Describe the major features of a phase diagram.Ch. 4 - What do the terms equilibrium and constitutional,...Ch. 4 - Prob. 8RQCh. 4 - What is tempering? Why is it performed?Ch. 4 - Explain what is meant by severity of quenching.
Ch. 4 - What are precipitates? Why are they significant in...Ch. 4 - Prob. 12RQCh. 4 - Prob. 13RQCh. 4 - Prob. 14RQCh. 4 - Prob. 15RQCh. 4 - You may have seen some technical literature on...Ch. 4 - Prob. 17QLPCh. 4 - What is the difference between hardness and...Ch. 4 - Prob. 19QLPCh. 4 - Prob. 20QLPCh. 4 - Prob. 21QLPCh. 4 - Describe the characteristics of (a) an alloy, (b)...Ch. 4 - Explain why carbon, among all elements, is so...Ch. 4 - Prob. 24QLPCh. 4 - In Section 4.8.2, several fluids are listed in...Ch. 4 - Why is it important to know the characteristics of...Ch. 4 - Explain why, in the abscissa of Fig. 4.16c, the...Ch. 4 - Prob. 28QLPCh. 4 - Prob. 29QLPCh. 4 - Prob. 30QLPCh. 4 - Design a heat-treating cycle for carbon steel,...Ch. 4 - Using Fig. 4.4, estimate the following quantities...Ch. 4 - Prob. 33QTPCh. 4 - Prob. 34QTPCh. 4 - Prob. 35SDPCh. 4 - Figure 4.18b shows hardness distributions in...Ch. 4 - Throughout this chapter, you have seen specific...Ch. 4 - Refer to Fig. 4.24, and think of a variety of...Ch. 4 - Inspect various parts in your car or home, and...
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- Why must cracks in the martensite layer of high-manganese steels be removed?arrow_forwardWhy is the formation of martensite a problem when welding on high carbon steels?arrow_forwardExplain the reason for the quenching cracking that may occur when hardening some parts. Describe the alternative methods applied to prevent this situation by showing them on a single figure.arrow_forward
- Estimate the quench rate (in °C/s) needed to avoid pearlite formation in 1.13 wt % C steel. Note that the quench rate is ΔT/tarrow_forward1. What distinguishing features do eutectoid and martensitic transformations in steel have? Compare and contrast them in brief.arrow_forwardWhich of the following is a method for strengthening metals and alloys: a. solution hardening b. full annealing c. work hardening d. incomplete casting e. cold working f. quenching g. incomplete fusionarrow_forward
- 1. Cold working is done in ambient temperature while hot working is done at around 600°C for steel. Differentiate the effect of the two process in steel, and the reason for using one from the other.arrow_forwardBriefly explain the heat treatment steps of a tool steel by use of proper drawings and explainwhy multiple tempering is applied during heat treatment?arrow_forwardIncrease in carbon content in plain carbon steels raise its (a) Ductility and UTS (b) Tensile strength and malleability (c) Tensile strength and hardness (d) Ductility and melting temperaturearrow_forward
- Explain the concept and procedures involved in a case hardening process of a low carbon steel and provide an example of the application of this technique to solving engineering problemsarrow_forwardIn your own words describe the following heat treatment procedures for steels and, for each, the intended final microstructure: (a) full annealing (b) normalizing (c) quenching (d) tempering.arrow_forwardMake use of drawings of segments of the Fe-Cr phase diagram to illustrate the reason for theexistence of ferritic, martensitic and austenitic stainless steels by also noting the influence ofspecific alloying elements where applicable.arrow_forward
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