Degarmo's Materials And Processes In Manufacturing
13th Edition
ISBN: 9781119492825
Author: Black, J. Temple, Kohser, Ronald A., Author.
Publisher: Wiley,
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Chapter 15, Problem 40RQ
To determine
Difference betweensemi centrifugal castings, centrifugal casting and centrifuging.
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Describe the die casting process in detail. Use neat sketches for clarity. Differentiate clearly between hot-chamber die casting and cold-chamber die casting processes.
What is the difference between true centrifugal and semi-centrifugal casting? Describe the centrifugal casting process in detail. Use neat sketches to elaborate your description.
2. What do the various elements that comprise the gating system? what are the
pouring basin in a sand casting?
3. Explain why a sprue should be tapered?
4. What are the disadvantages of die casting?
5. Explain the various kinds of patterns in use. What are the allowances provided
How do the patterns differ from the casting required?
6. Define Expendable-mold, Expendable-pattern Casting Processes
In turbine blade casting, how is a single-crystal structure achieved?
Select one or more:
a.
By using a curving coil-like channel in the casting mould
b.
By removing grain boundaries by hot working and recrystallisation
c.
By careful control of the temperatures of the mould
d.
By introducing impurities into the molten alloy in the mould
Chapter 15 Solutions
Degarmo's Materials And Processes In Manufacturing
Ch. 15 - What are some of the major disadvantages of the...Ch. 15 - What are some possible limitations of multiple-use...Ch. 15 - Prob. 3RQCh. 15 - Prob. 4RQCh. 15 - Why do permanent-mold castings generally have...Ch. 15 - Prob. 6RQCh. 15 - What is semipermanent-mold casting?Ch. 15 - Why might low production runs be unattractive for...Ch. 15 - Prob. 9RQCh. 15 - In addition to the mold cavity, what additional...
Ch. 15 - Prob. 11RQCh. 15 - Prob. 12RQCh. 15 - Prob. 13RQCh. 15 - Prob. 14RQCh. 15 - Prob. 15RQCh. 15 - Prob. 16RQCh. 15 - What types of products would be possible...Ch. 15 - Prob. 18RQCh. 15 - What are the most common die-cast materials?Ch. 15 - Contrast the materials used to make dies for...Ch. 15 - Prob. 21RQCh. 15 - Prob. 22RQCh. 15 - Prob. 23RQCh. 15 - Prob. 24RQCh. 15 - Prob. 25RQCh. 15 - Prob. 26RQCh. 15 - How does the air in the mold cavity escape in the...Ch. 15 - Are risers employed in die casting? Can sand cores...Ch. 15 - Prob. 29RQCh. 15 - Give some examples of cast-in inserts.Ch. 15 - Prob. 31RQCh. 15 - Prob. 32RQCh. 15 - Prob. 33RQCh. 15 - Prob. 34RQCh. 15 - Prob. 35RQCh. 15 - What is a thixotropic material? How does it...Ch. 15 - What are some of the attractive features of...Ch. 15 - Describe the inner surface profile of true...Ch. 15 - Prob. 39RQCh. 15 - Prob. 40RQCh. 15 - Prob. 41RQCh. 15 - Prob. 42RQCh. 15 - Prob. 43RQCh. 15 - What types of equipment are used by foundries to...Ch. 15 - What are some of the factors that influence the...Ch. 15 - What are some of the possible feedstock materials...Ch. 15 - What types of metals are commonly melted in...Ch. 15 - What are some of the ways that the melting rate of...Ch. 15 - What are some of the pros and cons of indirect...Ch. 15 - Prob. 50RQCh. 15 - Prob. 51RQCh. 15 - Prob. 52RQCh. 15 - What are the primary functions of a pouring...Ch. 15 - Prob. 54RQCh. 15 - Prob. 55RQCh. 15 - What are some common ways to remove cores from...Ch. 15 - Prob. 57RQCh. 15 - Prob. 58RQCh. 15 - What is the difference between infiltration and...Ch. 15 - Prob. 60RQCh. 15 - What are some of the ways that industrial robots...Ch. 15 - Prob. 62RQCh. 15 - Prob. 63RQCh. 15 - Attractive properties for casting alloys include...Ch. 15 - Prob. 2PCh. 15 - Prob. 3PCh. 15 - Prob. 4PCh. 15 - Select two of the methods used to produce and hold...Ch. 15 - Prob. 7PCh. 15 - Discuss the various features that this component...Ch. 15 - Prob. 3CSCh. 15 - Prob. 4CSCh. 15 - Prob. 5CSCh. 15 - Prob. 6CS
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- 1-In hot forming processes, the strain rate is important since deformation resistance of w.p. increases as is increased. ****** 2-The coating of interior surfaces of casting molds can aid....... 3- Based on nature of use, the cores can be classified into: 1. and 2. ..... and 4-In centrifugal casting, fine grain microstructure (resisting to corrosion, better mechanical properties) castings can be obtained because of...... 5-During manufacturing processes, the residual stresses can be arising due to three major reasons: 1......, 2...... and 3...... 6- The wheels, pulleys and flywheels can be manufacturing by...... casting. 7- The ...... of casting molds can help removing impurities and facilitating metal flow inside the molds. 8-In horizontal true centrifugal casting, a tubular products having uniform wall thickness can be obtained when...... is greater than ......arrow_forwarda) What is "Strip Casting" one of the casting methods? b) Which parameters affect strip thickness in strip casting? Write 4 parameters and list them. c) In the alumina based substrate shaped by strip casting, it is seen that the cast parts are quite fragile. What parameters do you intervene in order to increase the flexibility of the casting piece? (2 parameters) Explain the reasons. (2 Reasons)arrow_forward1) a) Explain the differences, advantages, disadvantages between expendable and permanent molds? , b) Explain fundamental properties and manufacturing sequence, in (a) sand casting and (b) cold chamber die castingarrow_forward
- Which of these factors causes more porosity to form toward the interior of a casting rather than toward the outside? (a) Gasses are less soluble in the solid metal than the liquid, so solidified areas push dissolved gasses toward the interior. (b) Casting under a vacuum causes gasses near the liquid metal surface to be drawn out of the liquid during solidification. (c) The feeding structures of the mold are designed to force entrapped air into the center of the casting. (d) Draft on the mold wall forces air bubbles toward the interior of the solidifying metal. (e) None of the above Non-eutectic alloys (most commercial alloys) solidify over a temperature range. Which of the following statements explains how this affects the casting process. (a) Solidified non-eutectic alloys are especially difficult to remove from metal dies (b) Non-eutectic alloys have significantly less fluidity than pure metals or eutectic alloys. (c) Non-eutectic alloys solidify starting from the outside of the…arrow_forwardWhat is a pattern? What are the consideration necessary while designing pattern in casting?arrow_forward: A horizontal true centrifugal casting process is used to make aluminum rings with the following dimensions: length=5 cm, outside diameter 65 cm, and inside diameter = 60 cm. (a) Determine the rotational speed that will provide a G- factor = 60. (b) centrifugal force per square meter (Pa) on the mold wall. %3Darrow_forward
- Mention all the features of centrifugal casting.arrow_forward3) What are the means of elastic and plastic deformations? List the passageway (gating system) elements in sand casting moulds and show them with drawing?arrow_forward(27) List the applications of permanent mold casting along with metals most commonly cast for permanent mold casting.arrow_forward
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